/**
 * Created by Iflytek_dsw on 2017/6/24.
 */public class MicRecordingView extends View{/**画笔*/private Paint paint;/**透明度集合*/private List<Integer> alphaList;/**所有圆环半径集合*/private List<Integer> circleList;/**圆环的颜色*/private int circleColor = Color.RED;/**圆环之间的间隔大小*/private int gapLength = 50;/**最大半径*/private int maxWidth = 200;/**圆环的个数*/private int circieNumber = 5;/**圆环的半径x，y*/private float circleX, circleY;/**是否运行动画*/private boolean isStarting = false;public MicRecordingView(Context context, AttributeSet attrs) {super(context, attrs);circleColor = Color.RED;paint = new Paint();paint.setColor(circleColor);alphaList = new ArrayList<>();circleList = new ArrayList<>();alphaList.add(0, 255);circleList.add(0, 0);}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {super.onSizeChanged(w, h, oldw, oldh);maxWidth = w > h ? h / 2 : w / 2;circleX = w / 2;circleY = h / 2;circieNumber = maxWidth / gapLength;}@Overridepublic void onDraw(Canvas canvas) {super.onDraw(canvas);for(int i = 0; i < circleList.size(); i++){int circleWidth = circleList.get(i);int alpha = alphaList.get(i);paint.setAlpha(alpha);canvas.drawCircle(circleX, circleY, circleWidth + gapLength, paint);if(isStarting && alpha > 0 && circleWidth < maxWidth){//一个圆环逐渐扩大alphaList.set(i, alpha - 1);circleList.set(i, circleWidth + 1);}/**当一个圆形的半径扩大到了gapLength的长度，就创建下一个圆*/if(isStarting && circleList.get(circleList.size() - 1) == gapLength){alphaList.add(255);circleList.add(0);}if(isStarting && circleList.size() == circieNumber){//保持圆圈在运行alphaList.remove(0);circleList.remove(0);}invalidate();}}/**
     *执行动画
     */public void start() {isStarting = true;}/**
     *停止动画
     */public void stop() {isStarting = false;}/**
     * 判断是都在不在执行
      */public boolean isStarting() {return isStarting;}
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"android:layout_width="match_parent" android:layout_height="match_parent"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context="dsw.iflytek.com.wymusic.MainActivity"><dsw.iflytek.com.wymusic.MicRecordingViewandroid:id="@+id/micView"android:layout_width="match_parent"android:layout_height="match_parent" /><ImageViewandroid:id="@+id/iv_mic"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerInParent="true"android:src="@mipmap/mic"/>
</RelativeLayout>

public class MainActivity extends AppCompatActivity {private ImageView imageView;private MicRecordingView micRecordingView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);micRecordingView = (MicRecordingView) findViewById(R.id.micView);imageView = (ImageView) findViewById(R.id.iv_mic);micRecordingView.start();}
}

paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(4);

int length = circleWidth + gapLength;
RectF rectF = new RectF(circleX - length, circleY - length/2,circleX + length, circleY + length/2);
canvas.drawOval(rectF, paint);