FreeDrawView

allprojects {
    repositories {
        maven {
            url 'https://s01.oss.sonatype.org/content/repositories/releases/'
        }
    }
}

 dependencies {
    implementation('com.gitee.chinasoft_ohos:FreeDrawView:1.0.1')
    ......  
 }

    <com.rm.freedrawview.FreeDrawView
                    ohos:id="$+id:free_draw_view"
                    ohos:height="match_parent"
                    ohos:width="match_parent"
                    ohos:background_element="$color:white"
                    app:paintAlpha="255"
                    app:paintColor="@color/black"
                    app:paintWidth="4vp"
                    app:resizeBehaviour="crop"/>

public class AbilityDrawSlice extends AbilitySlice {
    FreeDrawView mSignatureView;

    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_Ability_draw);
       ((AbilityDraw) getAbility()).setAbilityCall(this);
        mSignatureView = (FreeDrawView) findComponentById(ResourceTable.Id_free_draw_view);
        // Setup the View
        mSignatureView.setPaintColor(Color.BLACK);
        mSignatureView.setPaintWidthPx(12);
        mSignatureView.setPaintWidthDp(6);
        mSignatureView.setPaintAlpha(255);// from 0 to 255
        mSignatureView.setResizeBehaviour(ResizeBehaviour.CROP);// Must be one of ResizeBehaviour
                                                                // values;

        // This listener will be notified every time the path done and undone count changes
        mSignatureView.setPathRedoUndoCountChangeListener(new PathRedoUndoCountChangeListener() {
                                  @Override
                                  public void onUndoCountChanged(int undoCount) {
                                      // The undoCount is the number of the paths that can be undone
                                  }

                                  @Override
                                  public void onRedoCountChanged(int redoCount) {
                                      // The redoCount is the number of path removed that can be redrawn
                                  }
                              });
        // This listener will be notified every time a new path has been drawn
        mSignatureView.setOnPathDrawnListener(new PathDrawnListener() {
                    @Override
                    public void onNewPathDrawn() {
                        // The user has finished drawing a path
                    }

                    @Override
                    public void onPathStart() {
                        // The user has started drawing a path
                    }
                });

        // This will take a screenshot of the current drawn content of the view
        mSignatureView.getDrawScreenshot(new FreeDrawView.DrawCreatorListener() {
                                  @Override
                                  public void onDrawCreated(Bitmap draw) {
                                      // The draw Bitmap is the drawn content of the View
                                  }

                                  @Override
                                  public void onDrawCreationError() {
                                      // Something went wrong creating the bitmap, should never
                                      // happen unless the async task has been canceled
                                  }
                              });
    }
    @Override
    public void onSaveAbilityState(PacMap outState) {
        mFreeDrawView.onSaveAbilityState(outState);
    }

    @Override
    public void onRestoreAbilityState(PacMap inState) {
        setBackgroundColor(mSideView, mFreeDrawView.getPaintColor());
        mFreeDrawView.onRestoreAbilityState(inState);
    }
    
}

Copyright 2017 Riccardo Moro.

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.