private File imgFile;
	private String path;// 注意当前路径，为啥？下面讲到。

    public void takePhotoBy8(int requestCode) {
        File file = new File(path);
        if (!file.exists()) {
            file.mkdirs();
        }

        fileName = String.valueOf(System.currentTimeMillis()) + ".jpg";//文件的名字
        imgFile = new File(path, fileName);//生成该文件的 File 对象
        Uri imgUri;

        if (Build.VERSION.SDK_INT < 24) {
            imgUri = Uri.fromFile(imgFile);
        } else {//Android 7.0 访问本地文件的方式有变化，变得更加安全。
            // 注意：必须在 AndroidManifest.xml 添加对应的 provider，
            // 这里的第二个参数必须和 AndroidManifest 中 provider里面的 authorities: = 一致
            imgUri = FileProvider.getUriForFile(this, getPackageName(), imgFile);
        }

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);
        startActivityForResult(intent, requestCode);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == Activity.RESULT_OK) {
            Bitmap bitmap = BitmapFactory.decodeFile(path + fileName);
            //处理你的图片
        }
    }

    <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/AppTheme">

        <!--适配7.0+拍照返回 Start-->
        <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_path" />
        </provider>
        <!--适配7.0+拍照返回 End-->
				
    </application>

<paths>
    <external-path
        name="external_files"
        path="." />
    <root-path
        name="external_files"
        path="/storage/"/>
</paths>

<paths>
    <external-path
        name="BieMing"
        path="MyApp/image" />
</paths>

<paths>
    <external-path
        name="BieMing"
        path="MyApp" />
</paths>