diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..0f0fcad644efcc6b5201c632e72b9fbdc6b21785
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/DevHub/.idea/
diff --git a/DevHub/.gradle/7.0.2/dependencies-accessors/dependencies-accessors.lock b/DevHub/.gradle/7.0.2/dependencies-accessors/dependencies-accessors.lock
new file mode 100644
index 0000000000000000000000000000000000000000..e9e7b959fe27901f67d684502562c664315d24f8
Binary files /dev/null and b/DevHub/.gradle/7.0.2/dependencies-accessors/dependencies-accessors.lock differ
diff --git a/DevHub/.gradle/7.0.2/dependencies-accessors/gc.properties b/DevHub/.gradle/7.0.2/dependencies-accessors/gc.properties
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/DevHub/.gradle/7.0.2/executionHistory/executionHistory.bin b/DevHub/.gradle/7.0.2/executionHistory/executionHistory.bin
new file mode 100644
index 0000000000000000000000000000000000000000..b0b2c18a2542b7c00f76a93264caa5a8c1ffc9e6
Binary files /dev/null and b/DevHub/.gradle/7.0.2/executionHistory/executionHistory.bin differ
diff --git a/DevHub/.gradle/7.0.2/executionHistory/executionHistory.lock b/DevHub/.gradle/7.0.2/executionHistory/executionHistory.lock
new file mode 100644
index 0000000000000000000000000000000000000000..8096605db8df04aaca11e5229a194b48b0608d30
Binary files /dev/null and b/DevHub/.gradle/7.0.2/executionHistory/executionHistory.lock differ
diff --git a/DevHub/.gradle/7.0.2/fileChanges/last-build.bin b/DevHub/.gradle/7.0.2/fileChanges/last-build.bin
new file mode 100644
index 0000000000000000000000000000000000000000..f76dd238ade08917e6712764a16a22005a50573d
Binary files /dev/null and b/DevHub/.gradle/7.0.2/fileChanges/last-build.bin differ
diff --git a/DevHub/.gradle/7.0.2/fileHashes/fileHashes.bin b/DevHub/.gradle/7.0.2/fileHashes/fileHashes.bin
new file mode 100644
index 0000000000000000000000000000000000000000..487c6052077d1f09bc3f1d9099db31d56b40bd56
Binary files /dev/null and b/DevHub/.gradle/7.0.2/fileHashes/fileHashes.bin differ
diff --git a/DevHub/.gradle/7.0.2/fileHashes/fileHashes.lock b/DevHub/.gradle/7.0.2/fileHashes/fileHashes.lock
new file mode 100644
index 0000000000000000000000000000000000000000..b39ef07c3b5c738324ec30f946af42a5e08cd5b4
Binary files /dev/null and b/DevHub/.gradle/7.0.2/fileHashes/fileHashes.lock differ
diff --git a/DevHub/.gradle/7.0.2/fileHashes/resourceHashesCache.bin b/DevHub/.gradle/7.0.2/fileHashes/resourceHashesCache.bin
new file mode 100644
index 0000000000000000000000000000000000000000..226b252996b0c559c39b2911eb04e13ccc990c81
Binary files /dev/null and b/DevHub/.gradle/7.0.2/fileHashes/resourceHashesCache.bin differ
diff --git a/DevHub/.gradle/7.0.2/gc.properties b/DevHub/.gradle/7.0.2/gc.properties
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/DevHub/.gradle/7.0.2/javaCompile/classAnalysis.bin b/DevHub/.gradle/7.0.2/javaCompile/classAnalysis.bin
new file mode 100644
index 0000000000000000000000000000000000000000..5bc7afd859600698004910e6fa5997cef2325ae5
Binary files /dev/null and b/DevHub/.gradle/7.0.2/javaCompile/classAnalysis.bin differ
diff --git a/DevHub/.gradle/7.0.2/javaCompile/jarAnalysis.bin b/DevHub/.gradle/7.0.2/javaCompile/jarAnalysis.bin
new file mode 100644
index 0000000000000000000000000000000000000000..dbc8dc7f24c12f59c98fe2d003e65547b60b7d5e
Binary files /dev/null and b/DevHub/.gradle/7.0.2/javaCompile/jarAnalysis.bin differ
diff --git a/DevHub/.gradle/7.0.2/javaCompile/javaCompile.lock b/DevHub/.gradle/7.0.2/javaCompile/javaCompile.lock
new file mode 100644
index 0000000000000000000000000000000000000000..64af6cb1e78455449d50959286854a790493925d
Binary files /dev/null and b/DevHub/.gradle/7.0.2/javaCompile/javaCompile.lock differ
diff --git a/DevHub/.gradle/7.0.2/javaCompile/taskHistory.bin b/DevHub/.gradle/7.0.2/javaCompile/taskHistory.bin
new file mode 100644
index 0000000000000000000000000000000000000000..34c80457996fac352b375f1d0349dfe89b50b4f8
Binary files /dev/null and b/DevHub/.gradle/7.0.2/javaCompile/taskHistory.bin differ
diff --git a/DevHub/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/DevHub/.gradle/buildOutputCleanup/buildOutputCleanup.lock
new file mode 100644
index 0000000000000000000000000000000000000000..22f0ec2fd07775c2a2ef9df89b173986f4e07edf
Binary files /dev/null and b/DevHub/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ
diff --git a/DevHub/.gradle/buildOutputCleanup/cache.properties b/DevHub/.gradle/buildOutputCleanup/cache.properties
new file mode 100644
index 0000000000000000000000000000000000000000..04599456f34fdae853a6e3a60d39a5dd71b540b7
--- /dev/null
+++ b/DevHub/.gradle/buildOutputCleanup/cache.properties
@@ -0,0 +1,2 @@
+#Mon Oct 25 16:35:55 CST 2021
+gradle.version=7.0.2
diff --git a/DevHub/.gradle/buildOutputCleanup/outputFiles.bin b/DevHub/.gradle/buildOutputCleanup/outputFiles.bin
new file mode 100644
index 0000000000000000000000000000000000000000..b216ef769386df3d0d85e53ddccc0526a2c7255a
Binary files /dev/null and b/DevHub/.gradle/buildOutputCleanup/outputFiles.bin differ
diff --git a/DevHub/.gradle/checksums/checksums.lock b/DevHub/.gradle/checksums/checksums.lock
new file mode 100644
index 0000000000000000000000000000000000000000..bae9a0684cf5dd36350a22b7f037960248e7d908
Binary files /dev/null and b/DevHub/.gradle/checksums/checksums.lock differ
diff --git a/DevHub/.gradle/vcs-1/gc.properties b/DevHub/.gradle/vcs-1/gc.properties
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/DevHub/app/.gitignore b/DevHub/app/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..42afabfd2abebf31384ca7797186a27a4b7dbee8
--- /dev/null
+++ b/DevHub/app/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/DevHub/app/build.gradle b/DevHub/app/build.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..e259f108cae3205992b31b31b2ddef77087ad909
--- /dev/null
+++ b/DevHub/app/build.gradle
@@ -0,0 +1,38 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdk 31
+
+    defaultConfig {
+        applicationId "com.example.devhub"
+        minSdk 21
+        targetSdk 31
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}
\ No newline at end of file
diff --git a/DevHub/app/proguard-rules.pro b/DevHub/app/proguard-rules.pro
new file mode 100644
index 0000000000000000000000000000000000000000..481bb434814107eb79d7a30b676d344b0df2f8ce
--- /dev/null
+++ b/DevHub/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/DevHub/app/src/androidTest/java/com/example/devhub/ExampleInstrumentedTest.java b/DevHub/app/src/androidTest/java/com/example/devhub/ExampleInstrumentedTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..1849cea51c7738f1aedeb30fde3d3ce4b8898232
--- /dev/null
+++ b/DevHub/app/src/androidTest/java/com/example/devhub/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package com.example.devhub;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.example.devhub", appContext.getPackageName());
+    }
+}
\ No newline at end of file
diff --git a/DevHub/app/src/main/AndroidManifest.xml b/DevHub/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000000000000000000000000000000000000..9b48a00edc8044a17c97a19f403cf112f97feb56
--- /dev/null
+++ b/DevHub/app/src/main/AndroidManifest.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.devhub">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.DevHub">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
\ No newline at end of file
diff --git a/DevHub/app/src/main/java/com/example/devhub/MainActivity.java b/DevHub/app/src/main/java/com/example/devhub/MainActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..f7ee31cc2822c1e768e7ba63f6896ba8273d56ac
--- /dev/null
+++ b/DevHub/app/src/main/java/com/example/devhub/MainActivity.java
@@ -0,0 +1,18 @@
+package com.example.devhub;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.RadioButton;
+import android.widget.RadioGroup;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+    }
+}
\ No newline at end of file
diff --git a/DevHub/app/src/main/java/com/example/devhub/MyRadioButton.java b/DevHub/app/src/main/java/com/example/devhub/MyRadioButton.java
new file mode 100644
index 0000000000000000000000000000000000000000..f7b73d1be707d7feb029cee28744257048577bbb
--- /dev/null
+++ b/DevHub/app/src/main/java/com/example/devhub/MyRadioButton.java
@@ -0,0 +1,25 @@
+package com.example.devhub;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import androidx.annotation.Nullable;
+
+public class MyRadioButton extends androidx.appcompat.widget.AppCompatRadioButton {
+    public MyRadioButton(Context context) {
+        super(context);
+    }
+
+    public MyRadioButton(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public MyRadioButton(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @Override
+    public void toggle(){
+        setChecked(!isChecked());
+    }
+}
diff --git a/DevHub/app/src/main/res/drawable-hdpi/bg.png b/DevHub/app/src/main/res/drawable-hdpi/bg.png
new file mode 100644
index 0000000000000000000000000000000000000000..5a11f5d606d6fd065433c4fdd7daf26333b63e6e
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-hdpi/bg.png differ
diff --git a/DevHub/app/src/main/res/drawable-hdpi/design.png b/DevHub/app/src/main/res/drawable-hdpi/design.png
new file mode 100644
index 0000000000000000000000000000000000000000..7f2727a0830f64292857902a5835cf30cc8dddab
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-hdpi/design.png differ
diff --git a/DevHub/app/src/main/res/drawable-hdpi/img.png b/DevHub/app/src/main/res/drawable-hdpi/img.png
new file mode 100644
index 0000000000000000000000000000000000000000..dc4c81e120e2a92a2f6484b72157a7e206c6debe
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-hdpi/img.png differ
diff --git a/DevHub/app/src/main/res/drawable-hdpi/lock_icon.png b/DevHub/app/src/main/res/drawable-hdpi/lock_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..ce9a3122da4a2193b9e8d9bcdcd0229f3ea1e68a
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-hdpi/lock_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-hdpi/user_icon.png b/DevHub/app/src/main/res/drawable-hdpi/user_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..def107a5107d486cd68b9cfd3f40499181dcb14c
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-hdpi/user_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-ldpi/bg.png b/DevHub/app/src/main/res/drawable-ldpi/bg.png
new file mode 100644
index 0000000000000000000000000000000000000000..312ef9fa1c373ad4c92ca2648f78bbb161e443da
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-ldpi/bg.png differ
diff --git a/DevHub/app/src/main/res/drawable-ldpi/design.png b/DevHub/app/src/main/res/drawable-ldpi/design.png
new file mode 100644
index 0000000000000000000000000000000000000000..bce44a641754db539de282223f380f8cc22703c3
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-ldpi/design.png differ
diff --git a/DevHub/app/src/main/res/drawable-ldpi/img.png b/DevHub/app/src/main/res/drawable-ldpi/img.png
new file mode 100644
index 0000000000000000000000000000000000000000..2d78d83681b91e195e63e7edfe811a4318bbcdcf
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-ldpi/img.png differ
diff --git a/DevHub/app/src/main/res/drawable-ldpi/lock_icon.png b/DevHub/app/src/main/res/drawable-ldpi/lock_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..df5e72cfd3f20ad154f277a8d9a6e70286434cd1
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-ldpi/lock_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-ldpi/user_icon.png b/DevHub/app/src/main/res/drawable-ldpi/user_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..1f49fe5e9c43190f284dc56da803246865311d5d
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-ldpi/user_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-mdpi/bg.png b/DevHub/app/src/main/res/drawable-mdpi/bg.png
new file mode 100644
index 0000000000000000000000000000000000000000..3d6047cd959f0a8b0db94f823a933e4a6b67d372
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-mdpi/bg.png differ
diff --git a/DevHub/app/src/main/res/drawable-mdpi/design.png b/DevHub/app/src/main/res/drawable-mdpi/design.png
new file mode 100644
index 0000000000000000000000000000000000000000..22baff75f50bb4d1befa118e999ed08fe1dedfb8
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-mdpi/design.png differ
diff --git a/DevHub/app/src/main/res/drawable-mdpi/img.png b/DevHub/app/src/main/res/drawable-mdpi/img.png
new file mode 100644
index 0000000000000000000000000000000000000000..62856e5b5e94e113499681b64e4e705fdee80e77
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-mdpi/img.png differ
diff --git a/DevHub/app/src/main/res/drawable-mdpi/lock_icon.png b/DevHub/app/src/main/res/drawable-mdpi/lock_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..eb5634611636fa90fd865aee08013eda87ef5b5c
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-mdpi/lock_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-mdpi/radius_border.xml b/DevHub/app/src/main/res/drawable-mdpi/radius_border.xml
new file mode 100644
index 0000000000000000000000000000000000000000..22157e087d074d2f63f2319fa0225f67e5087d74
--- /dev/null
+++ b/DevHub/app/src/main/res/drawable-mdpi/radius_border.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" >
+    <solid android:color="#FFFFFF" />
+    <stroke
+        android:width="1dp"
+        android:color="@color/purple_200" />
+
+    <padding
+        android:bottom="1dp"
+        android:left="1dp"
+        android:right="1dp"
+        android:top="1dp" />
+    <corners android:radius="100dp" />
+
+</shape>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/drawable-mdpi/user_icon.png b/DevHub/app/src/main/res/drawable-mdpi/user_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..c32cb2a5b72a149abf1c79d610734289ccbe4d2b
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-mdpi/user_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/DevHub/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
new file mode 100644
index 0000000000000000000000000000000000000000..2b068d11462a4b96669193de13a711a3a36220a0
--- /dev/null
+++ b/DevHub/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/drawable-xhdpi/bg.png b/DevHub/app/src/main/res/drawable-xhdpi/bg.png
new file mode 100644
index 0000000000000000000000000000000000000000..5e049fb08c6a7d46ff0919d1560dbb5f5fca3adb
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xhdpi/bg.png differ
diff --git a/DevHub/app/src/main/res/drawable-xhdpi/design.png b/DevHub/app/src/main/res/drawable-xhdpi/design.png
new file mode 100644
index 0000000000000000000000000000000000000000..3863d8c1367d2bb4b05d3cb6a50b9e0af55c8258
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xhdpi/design.png differ
diff --git a/DevHub/app/src/main/res/drawable-xhdpi/img.png b/DevHub/app/src/main/res/drawable-xhdpi/img.png
new file mode 100644
index 0000000000000000000000000000000000000000..91dc07f58828c52202ca7481374ef9c1102ccee3
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xhdpi/img.png differ
diff --git a/DevHub/app/src/main/res/drawable-xhdpi/lock_icon.png b/DevHub/app/src/main/res/drawable-xhdpi/lock_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..58f313b21887b57574aaa030e6fc482fbde1dd10
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xhdpi/lock_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-xhdpi/user_icon.png b/DevHub/app/src/main/res/drawable-xhdpi/user_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..d6ed062dad959dff01b312ebfdf58c08b7930577
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xhdpi/user_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxhdpi/bg.png b/DevHub/app/src/main/res/drawable-xxhdpi/bg.png
new file mode 100644
index 0000000000000000000000000000000000000000..4a9eb6590e1b87ae6f722c23c6ebe0e63119ebe4
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxhdpi/bg.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxhdpi/design.png b/DevHub/app/src/main/res/drawable-xxhdpi/design.png
new file mode 100644
index 0000000000000000000000000000000000000000..12456b4b6aaceb6be9a721e5265e34388d0b8930
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxhdpi/design.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxhdpi/img.png b/DevHub/app/src/main/res/drawable-xxhdpi/img.png
new file mode 100644
index 0000000000000000000000000000000000000000..e63a1a1e61eb77b463d068d1b8546782e2083edd
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxhdpi/img.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxhdpi/lock_icon.png b/DevHub/app/src/main/res/drawable-xxhdpi/lock_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..20af5a09c1c365f6bd30e2d96bbf645f9f79184a
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxhdpi/lock_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxhdpi/radius_button.xml b/DevHub/app/src/main/res/drawable-xxhdpi/radius_button.xml
new file mode 100644
index 0000000000000000000000000000000000000000..a3772077b94921f1dbafd71a8733b91380f04ec0
--- /dev/null
+++ b/DevHub/app/src/main/res/drawable-xxhdpi/radius_button.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle" >
+
+    <!-- 填充的颜色 -->
+    <solid android:color="#FF065E8D" />
+
+    <!-- 设置按钮的四个角为弧形 -->
+    <!-- android:radius 弧形的半径 -->
+    <corners android:radius="15dip" />
+
+    <!-- padding：Button里面的文字与Button边界的间隔 -->
+    <padding
+        android:bottom="10dp"
+        android:left="10dp"
+        android:right="10dp"
+        android:top="10dp" />
+</shape>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/drawable-xxhdpi/user_icon.png b/DevHub/app/src/main/res/drawable-xxhdpi/user_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..3bc9af9ad579c880b734f3923cfe600aacdaddf6
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxhdpi/user_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxxhdpi/bg.png b/DevHub/app/src/main/res/drawable-xxxhdpi/bg.png
new file mode 100644
index 0000000000000000000000000000000000000000..f08196688b19c49a4e32f7fe5afe07612cefd657
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxxhdpi/bg.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxxhdpi/design.png b/DevHub/app/src/main/res/drawable-xxxhdpi/design.png
new file mode 100644
index 0000000000000000000000000000000000000000..654c987507e7d159331da52455b485ac95df0246
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxxhdpi/design.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxxhdpi/img.png b/DevHub/app/src/main/res/drawable-xxxhdpi/img.png
new file mode 100644
index 0000000000000000000000000000000000000000..19f219102e5fd78db42a684648420d0b5cd98ea4
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxxhdpi/img.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxxhdpi/lock_icon.png b/DevHub/app/src/main/res/drawable-xxxhdpi/lock_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..7e5aa283952f34446f7b4bf2efadb3ec445677b8
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxxhdpi/lock_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable-xxxhdpi/user_icon.png b/DevHub/app/src/main/res/drawable-xxxhdpi/user_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..a92cfc65ceed04ffa33d8b115f7ac717eeeb5b95
Binary files /dev/null and b/DevHub/app/src/main/res/drawable-xxxhdpi/user_icon.png differ
diff --git a/DevHub/app/src/main/res/drawable/ic_launcher_background.xml b/DevHub/app/src/main/res/drawable/ic_launcher_background.xml
new file mode 100644
index 0000000000000000000000000000000000000000..07d5da9cbf141911847041df5d7b87f0dd5ef9d4
--- /dev/null
+++ b/DevHub/app/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>
diff --git a/DevHub/app/src/main/res/layout/activity_main.xml b/DevHub/app/src/main/res/layout/activity_main.xml
new file mode 100644
index 0000000000000000000000000000000000000000..4ec14e293af01196f7a5759e1ee6674ae551b5c2
--- /dev/null
+++ b/DevHub/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,148 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/bg"
+    android:gravity="center"
+    android:orientation="vertical"
+    tools:context=".MainActivity">
+
+    <androidx.cardview.widget.CardView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="20dp"
+        android:layout_marginRight="20dp"
+        app:cardCornerRadius="20dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <ImageView
+                android:layout_width="match_parent"
+                android:layout_height="275dp"
+                android:layout_marginLeft="30dp"
+                android:layout_marginRight="30dp"
+                android:src="@drawable/img"
+                tools:ignore="ContentDescription">
+
+            </ImageView>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="40dp"
+                android:layout_gravity="center_vertical"
+                android:layout_marginLeft="30dp"
+                android:layout_marginRight="30dp"
+                android:background="@drawable/radius_border"
+                android:gravity="center_vertical"
+                android:orientation="horizontal">
+
+                <ImageView
+                    android:layout_width="25dp"
+                    android:layout_height="25dp"
+                    android:layout_margin="10dp"
+                    android:src="@drawable/user_icon"
+                    tools:ignore="ContentDescription">
+
+                </ImageView>
+
+                <EditText
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:autofillHints="username"
+                    android:background="@null"
+                    android:hint="@string/username_hint"
+                    android:inputType="text"
+                    android:textColor="@color/purple_200"
+                    android:textColorHint="@color/purple_200"
+                    android:textSize="14sp" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="40dp"
+                android:layout_gravity="center_vertical"
+                android:layout_marginLeft="30dp"
+                android:layout_marginTop="20dp"
+                android:layout_marginRight="30dp"
+                android:background="@drawable/radius_border"
+                android:gravity="center_vertical"
+                android:orientation="horizontal">
+
+                <ImageView
+                    android:layout_width="25dp"
+                    android:layout_height="25dp"
+                    android:layout_margin="10dp"
+                    android:src="@drawable/lock_icon"
+                    tools:ignore="ContentDescription" />
+
+                <EditText
+                    android:id="@+id/editTextTextPassword"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:autofillHints="password"
+                    android:background="@null"
+                    android:ems="10"
+                    android:hint="@string/password_hint"
+                    android:inputType="textPassword"
+                    android:textColor="@color/purple_200"
+                    android:textColorHint="@color/purple_200"
+                    android:textSize="14sp" />
+            </LinearLayout>
+
+            <com.example.devhub.MyRadioButton
+                android:id="@+id/rbt"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="30dp"
+                android:layout_marginTop="10dp"
+                android:checked="false"
+                android:text="@string/remember_hint"
+                android:textColor="@color/purple_200"
+                android:textSize="14sp"
+                android:theme="@style/MyRadioButton" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="70dp"
+                android:layout_marginTop="20dp"
+                android:gravity="center">
+
+                <Button
+                    android:layout_width="150dp"
+                    android:layout_height="60dp"
+                    android:backgroundTint="#21E4B4"
+                    android:text="登录"
+                    android:textSize="18sp"
+                    app:cornerRadius="100dp"
+                    tools:ignore="HardcodedText" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="20dp"
+                android:gravity="center">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="注册账号"
+                    android:layout_marginEnd="10dp"
+                    tools:ignore="HardcodedText" />
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="忘记密码"
+                    android:layout_marginStart="10dp"
+                    tools:ignore="HardcodedText" />
+            </LinearLayout>
+        </LinearLayout>
+    </androidx.cardview.widget.CardView>
+
+
+</LinearLayout>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/DevHub/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
new file mode 100644
index 0000000000000000000000000000000000000000..eca70cfe52eac1ba66ba280a68ca7be8fcf88a16
--- /dev/null
+++ b/DevHub/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/DevHub/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
new file mode 100644
index 0000000000000000000000000000000000000000..eca70cfe52eac1ba66ba280a68ca7be8fcf88a16
--- /dev/null
+++ b/DevHub/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/mipmap-hdpi/ic_launcher.webp b/DevHub/app/src/main/res/mipmap-hdpi/ic_launcher.webp
new file mode 100644
index 0000000000000000000000000000000000000000..c209e78ecd372343283f4157dcfd918ec5165bb3
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-hdpi/ic_launcher.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp b/DevHub/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp
new file mode 100644
index 0000000000000000000000000000000000000000..b2dfe3d1ba5cf3ee31b3ecc1ced89044a1f3b7a9
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-mdpi/ic_launcher.webp b/DevHub/app/src/main/res/mipmap-mdpi/ic_launcher.webp
new file mode 100644
index 0000000000000000000000000000000000000000..4f0f1d64e58ba64d180ce43ee13bf9a17835fbca
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-mdpi/ic_launcher.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp b/DevHub/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp
new file mode 100644
index 0000000000000000000000000000000000000000..62b611da081676d42f6c3f78a2c91e7bcedddedb
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-xhdpi/ic_launcher.webp b/DevHub/app/src/main/res/mipmap-xhdpi/ic_launcher.webp
new file mode 100644
index 0000000000000000000000000000000000000000..948a3070fe34c611c42c0d3ad3013a0dce358be0
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-xhdpi/ic_launcher.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp b/DevHub/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
new file mode 100644
index 0000000000000000000000000000000000000000..1b9a6956b3acdc11f40ce2bb3f6efbd845cc243f
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp b/DevHub/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp
new file mode 100644
index 0000000000000000000000000000000000000000..28d4b77f9f036a47549d47db79c16788749dca10
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp b/DevHub/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
new file mode 100644
index 0000000000000000000000000000000000000000..9287f5083623b375139afb391af71cc533a7dd37
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp b/DevHub/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
new file mode 100644
index 0000000000000000000000000000000000000000..aa7d6427e6fa1074b79ccd52ef67ac15c5637e85
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp differ
diff --git a/DevHub/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp b/DevHub/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
new file mode 100644
index 0000000000000000000000000000000000000000..9126ae37cbc3587421d6889eadd1d91fbf1994d4
Binary files /dev/null and b/DevHub/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp differ
diff --git a/DevHub/app/src/main/res/values-night/themes.xml b/DevHub/app/src/main/res/values-night/themes.xml
new file mode 100644
index 0000000000000000000000000000000000000000..30a0f187ee49f5064418de5d893376ec31e41e30
--- /dev/null
+++ b/DevHub/app/src/main/res/values-night/themes.xml
@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.DevHub" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/values/colors.xml b/DevHub/app/src/main/res/values/colors.xml
new file mode 100644
index 0000000000000000000000000000000000000000..f8c6127d327620c93d2b2d00342a68e97b98a48d
--- /dev/null
+++ b/DevHub/app/src/main/res/values/colors.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/values/strings.xml b/DevHub/app/src/main/res/values/strings.xml
new file mode 100644
index 0000000000000000000000000000000000000000..b150231c5243ebe7bc2f52ac27ee894b99daaa4e
--- /dev/null
+++ b/DevHub/app/src/main/res/values/strings.xml
@@ -0,0 +1,6 @@
+<resources>
+    <string name="app_name">DevHub</string>
+    <string name="username_hint">请输入用户名/邮箱</string>
+    <string name="password_hint">请输入密码</string>
+    <string name="remember_hint">记住我</string>
+</resources>
\ No newline at end of file
diff --git a/DevHub/app/src/main/res/values/themes.xml b/DevHub/app/src/main/res/values/themes.xml
new file mode 100644
index 0000000000000000000000000000000000000000..ecabce89a30e11079ad70ad404f33b51b1bedba8
--- /dev/null
+++ b/DevHub/app/src/main/res/values/themes.xml
@@ -0,0 +1,20 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.DevHub" parent="Theme.MaterialComponents.DayNight.NoActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+    <style name="MyRadioButton" parent="Theme.AppCompat.Light">
+        <item name="colorControlNormal">@color/purple_200</item>
+        <item name="colorControlActivated">@color/purple_200</item>
+    </style>
+</resources>
\ No newline at end of file
diff --git a/DevHub/app/src/test/java/com/example/devhub/ExampleUnitTest.java b/DevHub/app/src/test/java/com/example/devhub/ExampleUnitTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..894eca78190e7411dcc718b10b4bbf8decfb321f
--- /dev/null
+++ b/DevHub/app/src/test/java/com/example/devhub/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package com.example.devhub;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}
\ No newline at end of file
diff --git a/DevHub/build.gradle b/DevHub/build.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..7cbb664471e9962ce0d1c8bd9c31d9ca689c0f3a
--- /dev/null
+++ b/DevHub/build.gradle
@@ -0,0 +1,17 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath "com.android.tools.build:gradle:7.0.3"
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
\ No newline at end of file
diff --git a/DevHub/gradle.properties b/DevHub/gradle.properties
new file mode 100644
index 0000000000000000000000000000000000000000..52f5917cb0d0c47fd00ba8ee85c14eb27e1c41cc
--- /dev/null
+++ b/DevHub/gradle.properties
@@ -0,0 +1,19 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
\ No newline at end of file
diff --git a/DevHub/gradle/wrapper/gradle-wrapper.jar b/DevHub/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000000000000000000000000000000000000..e708b1c023ec8b20f512888fe07c5bd3ff77bb8f
Binary files /dev/null and b/DevHub/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/DevHub/gradle/wrapper/gradle-wrapper.properties b/DevHub/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000000000000000000000000000000000000..1c795477d8d6035ebf640de5b442532da66bd1d7
--- /dev/null
+++ b/DevHub/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Mon Oct 25 16:35:48 CST 2021
+distributionBase=GRADLE_USER_HOME
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
diff --git a/DevHub/gradlew b/DevHub/gradlew
new file mode 100644
index 0000000000000000000000000000000000000000..4f906e0c811fc9e230eb44819f509cd0627f2600
--- /dev/null
+++ b/DevHub/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/DevHub/gradlew.bat b/DevHub/gradlew.bat
new file mode 100644
index 0000000000000000000000000000000000000000..107acd32c4e687021ef32db511e8a206129b88ec
--- /dev/null
+++ b/DevHub/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/DevHub/local.properties b/DevHub/local.properties
new file mode 100644
index 0000000000000000000000000000000000000000..bc6bbe5450a4558a1315dabd7ab55c9dfce15a25
--- /dev/null
+++ b/DevHub/local.properties
@@ -0,0 +1,10 @@
+## This file is automatically generated by Android Studio.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+#
+# This file should *NOT* be checked into Version Control Systems,
+# as it contains information specific to your local configuration.
+#
+# Location of the SDK. This is only used by Gradle.
+# For customization when using a Version Control System, please read the
+# header note.
+sdk.dir=C\:\\Users\\27813\\AppData\\Local\\Android\\Sdk
\ No newline at end of file
diff --git a/DevHub/settings.gradle b/DevHub/settings.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..b366667def9d923cf4ec0efaf2e5688fdcd8696e
--- /dev/null
+++ b/DevHub/settings.gradle
@@ -0,0 +1,10 @@
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+        jcenter() // Warning: this repository is going to shut down soon
+    }
+}
+rootProject.name = "DevHub"
+include ':app'
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000000000000000000000000000000000000..29f81d812f3e768fa89638d1f72920dbfd1413a8
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/git.md b/git.md
new file mode 100644
index 0000000000000000000000000000000000000000..9707d07a01dbb5702b6f3063131fcdec2e72c7a9
--- /dev/null
+++ b/git.md
@@ -0,0 +1,20 @@
+## Git 说明
+
+> - `git clone https://gitee.com/npu-devhub/app-practice1.git`  
+>   将链接中仓库克隆到本地
+
+> - `cd app-practice1`  
+>   打开克隆过来的仓库文件夹
+
+> - `git checkout -b practice1/sunwukong-2018303999`  
+>   切换分支到`practice1/sunwukong-2018303999`
+
+> - `git add .`  
+>   将当前目录下的文件都添加到暂存区
+
+> - `git commit -m 'practice1: sunwukong-2018303999'`  
+>   将暂存区文件添加到本地仓库  
+>   `-m` 参数后添加了备注信息 `practice1: sunwukong-2018303999`
+
+> - `git push origin practice1/sunwukong-20183031999`  
+>   将本地`practice1/sunwukong-20183031999`分支推送到`origin`主机的同名分支下