绘画板，支持平滑跟随，常用形状，图层变换
Add it in your project's build.gradle at the end of repositories:
repositories {
// ...
maven { url "https://jitpack.io" }
}Step 2. Add the dependency in the form
dependencies {
compile 'com.github.vilyever:AndroidDrawingView:1.6.7'
}<com.vilyever.drawingview.DrawingView
android:id="@+id/drawingView"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
drawingView = (DrawingView) rootView.findViewById(R.id.drawingView);
drawingView.setUndoRedoStateDelegate(new DrawingView.UndoRedoStateDelegate() {
@Override
public void onUndoRedoStateChange(DrawingView drawingView, boolean canUndo, boolean canRedo) {
undoButton.setEnabled(canUndo);
redoButton.setEnabled(canRedo);
}
});
drawingView.setInterceptTouchDelegate(new DrawingView.InterceptTouchDelegate() {
@Override
public void requireInterceptTouchEvent(DrawingView drawingView, boolean isIntercept) {
}
});
drawingView.setBackgroundDatasource(new DrawingView.BackgroundDatasource() {
@Override
public Drawable gainBackground(DrawingView drawingView, String identifier) {
return null;
}
});
penBrush = PenBrush.defaultBrush();
drawingView.setBrush(penBrush);