Android实现水波纹扩散效果

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 super.onMeasure(widthMeasureSpec, widthMeasureSpec);
 if (!mInitDataSucceed){
 initData();
 }
}

private static final int ANIMATION_EACH_OFFSET = 800; // 每个动画的播放时间间隔
private static final int RIPPLE_VIEW_COUNT = 3;//波纹view的个数
private static final float DEFAULT_SCALE = 1.6f;//波纹放大后的大小

//点击有扩散效果的view
private CircleImageView mBtnImg;
private int mBtnViewHeight;
private int mBtnViewWidth;
private float mScale = DEFAULT_SCALE;
//图片资源
private int mBtnImgRes;
private int mRippleRes;
//是否初始化完成
private boolean mInitDataSucceed = false;

private void initData(){
 if (getMeasuredHeight() > 0 && getMeasuredWidth() > 0){
 mInitDataSucceed = true;

 int height = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();
 int width = getMeasuredWidth() - getPaddingLeft() - getPaddingRight();
 mBtnViewHeight = (int) (height / mScale);
 mBtnViewWidth = (int) (width / mScale);

 mBtnImg = new CircleImageView(getContext());
 mBtnImg.setImageResource(mBtnImgRes);
 mBtnImg.setOnTouchListener(this);

 addView(mBtnImg, getWaveLayoutParams());

 for (int i = 0; i 

@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
 if (mInitDataSucceed) {
 int childLeft = (getMeasuredWidth() - mBtnViewWidth) / 2;
 int childTop = (getMeasuredHeight() - mBtnViewHeight) / 2;
 for (int i = 0; i 

@Override
public boolean onTouch(View v, MotionEvent event) {
 switch (event.getAction()) {
 case MotionEvent.ACTION_DOWN:
  showWaveAnimation();
  break;
 case MotionEvent.ACTION_MOVE:
  break;
 case MotionEvent.ACTION_UP:
 case MotionEvent.ACTION_CANCEL:
  cancelWaveAnimation();
  break;
 default:
  cancelWaveAnimation();
  break;
 }
 return true;
}

private void showWaveAnimation() {
 for (int i = 0; i