我通过将形状和句柄作为单独的视图添加到 ViewGroup 来创建可缩放的形状。单击处理程序后,如何获取对 ViewGroup 的引用,以便可以缩放所有内容?handle.getParent() 返回空值。我的 ViewGroup 是以编程方式创建的。
public class ShapeView extends ViewGroup {
private SelectorView mSelectorView;
public ShapeView (Context context) {
super(context);
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(200, 200);
this.setLayoutParams(p);
mSelectorView = new SelectorView(context);
this.addView(mSelectorView);
}
}
public class SelectorView extends View {
public RectangleDrawable mRectangleDrawable;
public SelectorView (Context context) {
super(context);
Log.v(TAG, "constructor");
mRectangleDrawable = new RectangleDrawable();
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(20, 20);
this.setLayoutParams(p);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mRectangleDrawable.draw(canvas);
}
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
ViewGroup parentView = (ViewGroup)this.getParent();
parentView.setX(100);
parentView.setY(100);
break;
}
}
return true;
}
}