Android实现水波纹扩散效果的实例代码

xmlns:app="http://schemas.android.com/apk/res-auto"
<com.army.rippleimage.RippleImageView
 android:id="@+id/rippleImageView"
 android:layout_width="match_parent"
 android:layout_height="180dp"
 android:background="#37B158"
 app:show_spacing_time="800"//动画播放间隔时间
 app:imageViewWidth="35dp"//图片的大小
 app:imageViewHeigth="35dp"
 android:layout_centerHorizontal="true">
</com.army.rippleimage.RippleImageView>

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 imageViewWidth="+imageViewWidth+"px imageViewHeigth="+imageViewHeigth+"px");
 typedArray.recycle();
 }
 private void initView(Context context) {
 setLayout(context);
 for (int i = 0; i <imgs.length ; i++) {
 mAnimationSet[i]=initAnimationSet();
 }
 }
 /**
 * 开始动态布局
 */
 private void setLayout(Context context) {
 LayoutParams params=new LayoutParams(dip2px(context,imageViewWidth),dip2px(context,imageViewHeigth));
 //添加一个规则
 params.addRule(RelativeLayout.CENTER_IN_PARENT,RelativeLayout.TRUE);
 /**添加水波纹图片*/
 for (int i = 0; i <SIZE ; i++) {
 imgs[i] = new ImageView(context);
 imgs[i].setImageResource(R.mipmap.point_empty);
 addView(imgs[i],params);
 }
 LayoutParams params_bg=new LayoutParams(dip2px(context,imageViewWidth)+10,dip2px(context,imageViewHeigth)+10);
 //添加一个规则
 params_bg.addRule(RelativeLayout.CENTER_IN_PARENT,RelativeLayout.TRUE);
 /**添加背景图片*/
 img_bg=new ImageView(context);
 img_bg.setImageResource(R.mipmap.point_org);
 addView(img_bg,params_bg);
 }
 /**
 * 初始化动画集
 * @return
 */
 private AnimationSet initAnimationSet() {
 AnimationSet as = new AnimationSet(true);
 //缩放度：变大两倍
 ScaleAnimation sa = new ScaleAnimation(1f, 2f, 1f, 2f,
 ScaleAnimation.RELATIVE_TO_SELF, 0.5f,
 ScaleAnimation.RELATIVE_TO_SELF, 0.5f);
 sa.setDuration(show_spacing_time * 3);
 sa.setRepeatCount(Animation.INFINITE);// 设置循环
 //透明度
 AlphaAnimation aa = new AlphaAnimation(1, 0.1f);
 aa.setDuration(show_spacing_time * 3);
 aa.setRepeatCount(Animation.INFINITE);//设置循环
 as.addAnimation(sa);
 as.addAnimation(aa);
 return as;
 }
 private static int dip2px(Context context, float dipValue) {
 final float scale = context.getResources().getDisplayMetrics().density;
 return (int) (dipValue * scale + 0.5f);
 }
 //============================对外暴露的public方法=========================================
 /**
 * 开始水波纹动画
 */
 public void startWaveAnimation() {
 imgs[0].startAnimation(mAnimationSet[0]);
 mHandler.sendEmptyMessageDelayed(MSG_WAVE2_ANIMATION, show_spacing_time);
 mHandler.sendEmptyMessageDelayed(MSG_WAVE3_ANIMATION, show_spacing_time * 2);
 }
 /**
 * 停止水波纹动画
 */
 public void stopWaveAnimation() {
 for (int i = 0; i <imgs.length ; i++) {
 imgs[i].clearAnimation();
 }
 }
 /**获取播放的速度*/
 public int getShow_spacing_time() {
 return show_spacing_time;
 }
 /**设计播放的速度，默认是800毫秒*/
 public void setShow_spacing_time(int show_spacing_time) {
 this.show_spacing_time = show_spacing_time;
 }
}

<declare-styleable name="custume_ripple_imageview">
 <attr name="show_spacing_time" format="integer"></attr>
 <attr name="imageViewWidth" format="dimension"></attr>
 <attr name="imageViewHeigth" format="dimension"></attr>
</declare-styleable>