对于现在最火的无外乎集五福了，而五福除了加十个好友获得外，最直接的途径就是支付宝的咻一咻了。那么咻一咻具体有哪些实现方式呢？下面我们将一一介绍这几种思路的实现过程。

1.自定义View实现咻一咻

那么这种实现方法需要掌握Canvas以及Paint几乎所有的方法。其对程序员的专业知识要求极高。

用该种方式实现的优点有：

㈠这种是最复杂的实现方法，但其兼容性最高，其支持android的所有设备。

㈡其对内存要求不大，几乎不占用任何内存。

下面我们来看看是怎样实现其效果的：

public class XiuYiXiuView extends View { /***
 * 中心图片画笔
 */
 private Paint paint;
 /***
 * 水波圆圈画笔
 */
 private Paint circlePaint;
 /***
 * 用bitmap创建画布
 */
 private Bitmap bitmap;
 /***
 * 中心图片
 */
 private Bitmap imageBit;
 /***
 * 画布
 */
 private Canvas canvas;
 /***
 * 屏幕的宽
 */
 private int screenWidth;
 /***
 * 屏幕的高
 */
 private int screenHeight;
 /***
 * 图片右上角坐标
 */
 private Point pointLeftTop;
 /***
 * 图片右下角坐标
 */
 private Point pointRightBottom;
 /***
 * 记录圆圈
 */
 private List<LYJCircle> lyjCircleList;
 /***
 * 标记是否按下按钮，并且源泉是否扩散消失
 */
 private boolean isSpread=false;
 /***
 * 默认没有按动时候的圆圈
 */
 private LYJCircle defaultCircle;
 public XiuYiXiuView(Context context, AttributeSet attrs) { super(context, attrs);
 this.lyjCircleList=new ArrayList<>();
 screenWidth=LYJUtils.getScreenWidth((Activity) context);
 screenHeight=LYJUtils.getScreenHeight((Activity) context);
 bitmap = Bitmap.createBitmap(screenWidth, screenHeight, Bitmap.Config.ARGB_8888); // 设置位图的宽高
 canvas = new Canvas();
 canvas.setBitmap(bitmap);
 paint=new Paint(Paint.DITHER_FLAG);
 paint.setAntiAlias(true);
 circlePaint=new Paint(Paint.DITHER_FLAG);
 circlePaint.setAntiAlias(true);
 imageBit= BitmapFactory.decodeResource(getResources(), R.drawable.bwa_homepage_yuyin);
 pointLeftTop=new Point((screenWidth/2)-(imageBit.getWidth()/2),(screenHeight/2)-(imageBit.getHeight()/2));
 pointRightBottom=new Point(pointLeftTop.x+imageBit.getWidth(),pointLeftTop.y+imageBit.getHeight());
 canvas.drawBitmap(imageBit,pointLeftTop.x,pointLeftTop.y,paint);
 //取图片上的颜色
 Palette.generateAsync(imageBit, new Palette.PaletteAsyncListener() { @Override
 public void onGenerated(Palette palette) { Palette.Swatch swatch1 = palette.getVibrantSwatch(); //充满活力的色板
 circlePaint.setColor(swatch1.getRgb());
 circlePaint.setStyle(Paint.Style.STROKE);
 circlePaint.setStrokeWidth(10);
 circlePaint.setAlpha(100);
 paint.setShadowLayer(15, 0, 0, swatch1.getRgb());//设置阴影效果
 int[] mColors = new int[] {//渲染颜色
 Color.TRANSPARENT,swatch1.getRgb() };
 //范围，这里可以微调，实现你想要的渐变
 float[] mPositions = new float[] { 0f, 0.1f
 };
 Shader shader=new RadialGradient(screenWidth / 2,screenHeight / 2,imageBit.getWidth() / 2 + 10,mColors, mPositions,
 Shader.TileMode.MIRROR);
 circlePaint.setShader(shader);
 defaultCircle=new LYJCircle(screenWidth / 2, screenHeight / 2, imageBit.getWidth() / 2 + 10);
 clearScreenAndDrawList();
 Message message = handler.obtainMessage(1);
 handler.sendMessageDelayed(message, 1000); //发送message

 } });
 } @Override
 public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()){ case MotionEvent.ACTION_DOWN: break;
 case MotionEvent.ACTION_MOVE: break;
 case MotionEvent.ACTION_UP: isSpread=true;//是否按下图片
 lyjCircleList.add(new LYJCircle(screenWidth / 2, screenHeight / 2, imageBit.getWidth() / 2 + 10));
 clearScreenAndDrawList();
 invalidate();
 break;
 default: break;
 } return true;
 } private Handler handler = new Handler(){ public void handleMessage(Message msg){ switch (msg.what) { case 1: //定时更新界面
 clearScreenAndDrawList();
 invalidate();
 Message message = handler.obtainMessage(1);
 handler.sendMessageDelayed(message, 200);
 } super.handleMessage(msg);
 } };


 /**
 * 清掉屏幕上所有的圆圈，然后画出集合里面的圆圈
 */
 private void clearScreenAndDrawList() { canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
 //判断是否按下图片，并且外圈执行完成没有。
 if(!isSpread){ circlePaint.setMaskFilter(null);
 canvas.drawCircle(defaultCircle.getRoundX(), defaultCircle.getRoundY(),defaultCircle.getRadiuLoop(), circlePaint);// 画线
 }else{ for (LYJCircle lyjCircle : lyjCircleList) { if(lyjCircle.getSpreadRadiu()==0){ }else if(lyjCircle.getSpreadRadiu()>(lyjCircle.getRadiu()+99)){ //如果圆圈扩散半径大于图片半径+99，那么设置边缘模糊，也就是淡出的效果
 circlePaint.setMaskFilter(new BlurMaskFilter(5, BlurMaskFilter.Blur.OUTER));
 canvas.drawCircle(lyjCircle.getRoundX(), lyjCircle.getRoundY(),lyjCircle.getSpreadRadiu(), circlePaint);// 画线
 }else{ //不是则按正常的环形渲染来
 circlePaint.setMaskFilter(null);
 canvas.drawCircle(lyjCircle.getRoundX(), lyjCircle.getRoundY(),lyjCircle.getSpreadRadiu(), circlePaint);// 画线
 } } } canvas.drawBitmap(imageBit,pointLeftTop.x,pointLeftTop.y,paint);
 //释放小时了的圆圈
 for(int i=0;i<lyjCircleList.size();i++){ if(lyjCircleList.get(i).getSpreadRadiu()==0){ lyjCircleList.remove(i);
 } } //如果没有点击图片发射出去的圆圈，那么就恢复默认缩放。
 if(lyjCircleList.size()<=0){ isSpread=false;
 } } @Override
 protected void onDraw(Canvas canvas) { canvas.drawBitmap(bitmap, 0, 0, null);
 }
}

圆类：

package com.example.liyuanjing.model;

/**
 * Created by liyuanjing on 2016/2/3.
 */
public class LYJCircle { private int roundX;//圆中心点X坐标
 private int roundY;//圆中心点Y坐标
 private int radiu;//圆半径
 private int currentRadiu;//当前radiu
 private int lastRadiu;//历史radiu
 private int spreadRadiu;//加速半径
 private int[] speed=new int[]{6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6};//半径扩大速度。这里为匀速
 private int speedLast=0;//记录历史值
 public LYJCircle(int roundX,int roundY,int radiu){ this.roundX=roundX;
 this.roundY=roundY;
 this.radiu=radiu;
 this.spreadRadiu=radiu;
 this.currentRadiu=this.radiu;
 this.lastRadiu=this.currentRadiu;
 } //获取半径
 public int getRadiu() { return radiu;
 } public void setRadiu(int radiu) { this.radiu = radiu;
 } //获取加速半径
 public int getSpreadRadiu(){ if(speedLast>=speed.length){ return 0;
 } spreadRadiu+=speed[speedLast];
 ++speedLast;
 return spreadRadiu;
 } //获取循环缩放半径
 public int getRadiuLoop() { if(currentRadiu==lastRadiu){ ++currentRadiu;
 }else if(currentRadiu>lastRadiu){ if(currentRadiu>(radiu+20)){ currentRadiu=19+radiu;
 lastRadiu=20+radiu;
 }else{ lastRadiu=currentRadiu;
 currentRadiu+=5;
 } }else{ if(currentRadiu<(radiu+9)){ currentRadiu=10+radiu;
 lastRadiu=9+radiu;
 }else{ lastRadiu=currentRadiu;
 currentRadiu-=5;
 } } return currentRadiu;
 } public int getRoundX() { return roundX;
 } public int getRoundY() { return roundY;
 }
}

看看其效果图：

你可以修改如下两个地方，会产生视觉上真真的波纹效果：

①支付宝的背景图片是淡红色，衬托了红色的波纹。当然了你也可以将画布设置为透明淡红色。

②其为填充圆圈渲染，不是我的边框渲染效果，你可以将circlePaint.setStyle(Paint.Style.STROKE);换成Paint.Style.FILL.然后，微调shader的mPositions实现环形填充渐变。你也许会觉得，你看支付宝咻一咻圆圈弹开的时候内圈有波纹也像外弹开，其实那就是环形渐变，当你圆圈变大后，其渐变的范围也就变大了，自然你看到有颜色周围扩散的迹象。

2.属性动画实现咻一咻

其要掌握的只是基本只需要属性动画，在加一点线程方面有关的知识而已。

下面我们看看其实现步骤：

㈠自定义View实现一个圆即可,代码如下：

public class LYJCircleView extends View { private Bitmap bitmap;
 private Paint paint;
 private Canvas canvas;
 private int screenWidth;
 private int screenHeight;
 private boolean isSpreadFlag=false;//标记是否发射完成

 public boolean isSpreadFlag() { return isSpreadFlag;
 } public void setIsSpreadFlag(boolean isSpreadFlag) { this.isSpreadFlag = isSpreadFlag;
 } public LYJCircleView(Context context,int width,int height,int statusHeight) { super(context);
 screenWidth= LYJUtils.getScreenWidth((Activity) context);
 screenHeight=LYJUtils.getScreenHeight((Activity) context);
 bitmap = Bitmap.createBitmap(screenWidth, screenHeight, Bitmap.Config.ARGB_8888); // 设置位图的宽高
 canvas = new Canvas();
 canvas.setBitmap(bitmap);
 paint=new Paint(Paint.DITHER_FLAG);
 paint.setAntiAlias(true);
 paint.setColor(Color.RED);
 paint.setStyle(Paint.Style.STROKE);
 paint.setStrokeWidth(5);
 paint.setAlpha(100);
 paint.setShadowLayer(10, 0, 0, Color.RED);
 int[] mColors = new int[] { Color.TRANSPARENT,Color.RED
 };
 float[] mPositions = new float[] { 0f, 0.1f
 };
 Shader shader=new RadialGradient(screenWidth / 2,screenHeight / 2,width / 2 + 10,mColors, mPositions,
 Shader.TileMode.MIRROR);
 paint.setShader(shader);
 canvas.drawCircle(screenWidth / 2, (screenHeight - statusHeight) / 2, width / 2 + 10, paint);
 invalidate();
 } @Override
 protected void onDraw(Canvas canvas) { canvas.drawBitmap(bitmap,0,0,null);
 }
}

代码与上面差不多，就不注释了。

㈡实现Activity即可

public class XiuYiXiuActivity extends AppCompatActivity { private ImageButton mImageButton;
 private LYJCircleView lyjCircleView;
 private RelativeLayout relativeLayout;
 private List<LYJCircleView> lyjCircleViewList;
 private int statusBarHeight;
 private Animator anim;
 @Override
 protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
 setContentView(R.layout.xiuyixiu_activity_main);
 this.mImageButton=(ImageButton)findViewById(R.id.xiuyixiu_imagebutton);
 this.relativeLayout=(RelativeLayout)findViewById(R.id.xiuyixiu_relativelayout);
 this.lyjCircleViewList=new ArrayList<>();
 this.mImageButton.setOnClickListener(new View.OnClickListener() { @Override
 public void onClick(View v) { lyjCircleView.setVisibility(View.GONE);//发射圆圈，即将循环动画View隐藏
 final LYJCircleView item=new LYJCircleView(XiuYiXiuActivity.this, mImageButton.getWidth(), mImageButton.getHeight(), statusBarHeight);
 Animator spreadAnim = AnimatorInflater.loadAnimator(XiuYiXiuActivity.this, R.animator.circle_spread_animator);
 spreadAnim.addListener(new Animator.AnimatorListener() { @Override
 public void onAnimationStart(Animator animation) { } @Override
 public void onAnimationEnd(Animator animation) { item.setIsSpreadFlag(true);//动画执行完成，标记一下
 } @Override
 public void onAnimationCancel(Animator animation) { } @Override
 public void onAnimationRepeat(Animator animation) { } });
 spreadAnim.setTarget(item);
 spreadAnim.start();
 lyjCircleViewList.add(item);
 relativeLayout.addView(item);
 relativeLayout.invalidate();
 Message message = handler.obtainMessage(1);
 handler.sendMessageDelayed(message, 10); //发送message,定时释放LYJCircleView
 } });
 } private Handler handler = new Handler(){ public void handleMessage(Message msg){ switch (msg.what) { case 1: for(int i=0;i<lyjCircleViewList.size();i++){ if(lyjCircleViewList.get(i).isSpreadFlag()){ relativeLayout.removeView(lyjCircleViewList.get(i));
 lyjCircleViewList.remove(i);
 relativeLayout.invalidate();
 } } if(lyjCircleViewList.size()<=0){ lyjCircleView.setVisibility(View.VISIBLE);
 } Message message = handler.obtainMessage(1);
 handler.sendMessageDelayed(message, 10);
 } super.handleMessage(msg);
 } };

 @Override
 public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus);
 //获取状态栏高度
 Rect frame = new Rect();
 getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
 statusBarHeight = frame.top;
 this.mImageButton.post(new Runnable() { @Override
 public void run() { lyjCircleView = new LYJCircleView(XiuYiXiuActivity.this, mImageButton.getWidth(), mImageButton.getHeight(), statusBarHeight);
 relativeLayout.addView(lyjCircleView);
 relativeLayout.postInvalidate();
 // 加载动画
 anim = AnimatorInflater.loadAnimator(XiuYiXiuActivity.this, R.animator.circle_scale_animator);
 anim.addListener(new Animator.AnimatorListener() { @Override
 public void onAnimationStart(Animator animation) { } @Override
 public void onAnimationEnd(Animator animation) { anim.start();//循环执行动画
 } @Override
 public void onAnimationCancel(Animator animation) { } @Override
 public void onAnimationRepeat(Animator animation) { } });
 anim.setTarget(lyjCircleView);
 anim.start();
 } });
 }
}

㈢布局文件代码如下：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/xiuyixiu_relativelayout"
 android:layout_width="match_parent"
 android:layout_height="match_parent">

 <ImageButton
 android:id="@+id/xiuyixiu_imagebutton"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_centerInParent="true"
 android:background="@drawable/bwa_homepage_yuyin"/>

</RelativeLayout>

当然上面两个实现方法，我都只设置圆边框，没有填充，你可以设置为填充后，在微调渐变值。

其属性动画文件circle_scale_animator.xml：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
 android:ordering="together">
 <objectAnimator
 android:duration="1000"
 android:propertyName="scaleX"
 android:valueFrom="1.0"
 android:valueTo="1.2"
 android:valueType="floatType">
 </objectAnimator>
 <objectAnimator
 android:duration="1000"
 android:propertyName="scaleY"
 android:valueFrom="1.0"
 android:valueTo="1.2"
 android:valueType="floatType">
 </objectAnimator>
 <objectAnimator
 android:startOffset="1000"
 android:duration="1000"
 android:propertyName="scaleX"
 android:valueFrom="1.2"
 android:valueTo="1.0"
 android:valueType="floatType">
 </objectAnimator>
 <objectAnimator
 android:startOffset="1000"
 android:duration="1000"
 android:propertyName="scaleY"
 android:valueFrom="1.2"
 android:valueTo="1.0"
 android:valueType="floatType">
 </objectAnimator>
</set>

另一个circle_spread_animator.xml为：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
 <objectAnimator
 android:duration="1000"
 android:propertyName="scaleY"
 android:valueFrom="1.0"
 android:valueTo="2.0"
 android:valueType="floatType">
 </objectAnimator>
 <objectAnimator
 android:duration="1000"
 android:propertyName="scaleX"
 android:valueFrom="1.0"
 android:valueTo="2.0"
 android:valueType="floatType">
 </objectAnimator>
</set>

其效果图如下：

3.Android 5.0逆天实现咻一咻

这个仅标记出来，不做讲解，不过有几个知识提示一下，你就明白了，不过此种方式实现只兼容5.0以上设备，不兼容5.0以下设备。

我们都知道5.0中提供如下两个属性：

android:background="?android:attr/selectableItemBackground"波纹有边界


android:background="?android:attr/selectableItemBackgroundBorderless"波纹超出边界

设置下面这个就会绘制一个圆形的波纹（不管你的控件是不是圆形）。

通过android:colorControlHighlight设置波纹颜色。

那么好了就，介绍这么多了，时间匆促，要过年了。最后附上本文源码：

https://github.com/liyuanjinglyj/XiuYiXiuDemo

文章来源: liyuanjinglyj.blog.csdn.net，作者：李元静，版权归原作者所有，如需转载，请联系作者。

原文链接：liyuanjinglyj.blog.csdn.net/article/details/50638848