Android实现水波纹扩散效果的实例代码

xmlns:app="http://schemas.android.com/apk/res-auto"

rippleImageView=(RippleImageView)findViewById(R.id.rippleImageView);
//开始动画
rippleImageView.startWaveAnimation();
//停止动画
rippleImageView.stopWaveAnimation();

/**
 * Description :
 * Author : liujun
 * Email : liujin2son@163.com
 */
public class RippleImageView extends RelativeLayout {
 private static final int SHOW_SPACING_TIME=700;
 private static final int MSG_WAVE2_ANIMATION = 1;
 private static final int MSG_WAVE3_ANIMATION = 2;
 private static final int IMAMGEVIEW_SIZE = 80;
 /**三张波纹图片*/
 private static final int SIZE =3 ;
 /**动画默认循环播放时间*/
 private int show_spacing_time=SHOW_SPACING_TIME;
 /**初始化动画集*/
 private AnimationSet [] mAnimatiOnSet=new AnimationSet[SIZE];
 /**水波纹图片*/
 private ImageView [] imgs=new ImageView[SIZE];
 /**背景图片*/
 private ImageView img_bg;
 /**水波纹和背景图片的大小*/
 private float imageViewWidth=IMAMGEVIEW_SIZE;
 private float imageViewHeigth=IMAMGEVIEW_SIZE;
 private Handler mHandler = new Handler() {
 @Override
 public void handleMessage(Message msg) {
 switch (msg.what) {
 case MSG_WAVE2_ANIMATION:
  imgs[MSG_WAVE2_ANIMATION].startAnimation(mAnimationSet[MSG_WAVE2_ANIMATION]);
  break;
 case MSG_WAVE3_ANIMATION:
  imgs[MSG_WAVE2_ANIMATION].startAnimation(mAnimationSet[MSG_WAVE3_ANIMATION]);
  break;
 }
 }
 };
 public RippleImageView(Context context) {
 super(context);
 initView(context);
 }
 public RippleImageView(Context context, AttributeSet attrs) {
 super(context, attrs);
 getAttributeSet(context,attrs);
 initView(context);
 }
 /**
 * 获取xml属性
 * @param context
 * @param attrs
 */
 private void getAttributeSet(Context context, AttributeSet attrs) {
 TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.custume_ripple_imageview);
 show_spacing_time = typedArray.getInt(R.styleable.custume_ripple_imageview_show_spacing_time, SHOW_SPACING_TIME);
 imageViewWidth = typedArray.getDimension(R.styleable.custume_ripple_imageview_imageViewWidth, IMAMGEVIEW_SIZE);
 imageViewHeigth = typedArray.getDimension(R.styleable.custume_ripple_imageview_imageViewHeigth, IMAMGEVIEW_SIZE);
 Log.d("TAG","show_spacing_time="+show_spacing_time+"mm imageViewpx imageViewHeigth="+imageViewHeigth+"px");
 typedArray.recycle();
 }
 private void initView(Context context) {
 setLayout(context);
 for (int i = 0; i