本文讲述了Android实现水波纹扩散效果的实例代码。分享给大家供大家参考，具体如下：

1.效果图：

2.使用方法：

在xml里使用RippleImageView自定义控件：

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

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">

在Activity中的使用：

rippleImageView=(RippleImageView)findViewById(R.id.rippleImageView);

//开始动画

rippleImageView.startWaveAnimation();

//停止动画

rippleImageView.stopWaveAnimation();

3.如何将自定义控件引入到项目：

拷贝自定义控件RippleImageView

/**

* 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

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

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[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;

}

}

拷贝自定义属性到arrts下

拷贝默认图片