使用的时候直接在布局中引入即可
<com.icbc.elife.views.CircleImageView android:id="@+id/logo" android:layout_width="70dp" android:layout_height="70dp" android:scaleType="fitXY" android:src="@drawable/ic_launcher" />实现类：
package com.icbc.elife.views; import java.lang.ref.SoftReference; import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Path;import android.graphics.PorterDuff;import android.graphics.PorterDuffXfermode;import android.graphics.RectF;import android.util.AttributeSet;import android.widget.ImageView; public class CircleImageView extends ImageView { private Paint paint;private Paint paint2; private int width;private int height; private int angleSize; private SoftReference<Bitmap> sr; public CircleImageView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);init(context);} public CircleImageView(Context context, AttributeSet attrs) {super(context, attrs);init(context);} public CircleImageView(Context context) {super(context);init(context);} private void init(Context context) {paint = new Paint(Paint.ANTI_ALIAS_FLAG);paint.setColor(Color.WHITE);paint.setAntiAlias(true);paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); paint2 = new Paint(Paint.ANTI_ALIAS_FLAG);paint2.setXfermode(null); } @Overridepublic void draw(Canvas canvas) { Bitmap bmpCache = null;if (sr != null) {bmpCache = sr.get();} if (bmpCache == null || bmpCache.isRecycled()|| bmpCache.getWidth() != width|| bmpCache.getHeight() != height) {if (bmpCache != null) {bmpCache.recycle();}bmpCache = Bitmap.createBitmap(width, height,Bitmap.Config.ARGB_8888);sr = new SoftReference<Bitmap>(bmpCache);} else {bmpCache.eraseColor(0);} Canvas canvas2 = new Canvas(bmpCache);super.draw(canvas2);drawLiftUp(canvas2);drawRightUp(canvas2);drawLiftDown(canvas2);drawRightDown(canvas2);canvas.drawBitmap(bmpCache, 0, 0, paint2); } private void drawLiftUp(Canvas canvas) {Path path = new Path();path.moveTo(0, angleSize);path.lineTo(0, 0);path.lineTo(angleSize, 0);path.arcTo(new RectF(0, 0, angleSize * 2, angleSize * 2), -90, -90);path.close();canvas.drawPath(path, paint);} private void drawLiftDown(Canvas canvas) {Path path = new Path();path.moveTo(0, height - angleSize);path.lineTo(0, height);path.lineTo(angleSize, height);path.arcTo(new RectF(0, height - angleSize * 2, 0 + angleSize * 2,getHeight()), 90, 90);path.close();canvas.drawPath(path, paint);} private void drawRightDown(Canvas canvas) {Path path = new Path();path.moveTo(width - angleSize, height);path.lineTo(width, height);path.lineTo(width, height - angleSize);path.arcTo(new RectF(width - angleSize * 2, height - angleSize * 2,width, height), 0, 90);path.close();canvas.drawPath(path, paint);} private void drawRightUp(Canvas canvas) {Path path = new Path();path.moveTo(width, angleSize);path.lineTo(width, 0);path.lineTo(width - angleSize, 0);path.arcTo(new RectF(width - angleSize * 2, 0, width, 0 + angleSize * 2),-90, 90);path.close();canvas.drawPath(path, paint);} @Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {super.onSizeChanged(w, h, oldw, oldh);width = w;height = h;angleSize = ((width <= height) ? width : height) / 2;} }