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package xiaosi.RoundConcer;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.RectF;import android.os.Bundle;import android.widget.ImageView;public class RoundConcerActivity extends Activity{	/** Called when the activity is first created. */	private ImageView roundImage = null;	@Override	public void onCreate(Bundle savedInstanceState)	{		super.onCreate(savedInstanceState);		setContentView(R.layout.main);				roundImage = (ImageView)findViewById(R.id.roundconcer);						Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.a);		roundImage.setImageBitmap(getRoundCornerImage(bitmap, 50));	}	public static Bitmap getRoundCornerImage(Bitmap bitmap, int roundPixels)	{		//创建一个和原始图片一样大小位图		Bitmap roundConcerImage = Bitmap.createBitmap(bitmap.getWidth(),				bitmap.getHeight(), Config.ARGB_8888);		//创建带有位图roundConcerImage的画布		Canvas canvas = new Canvas(roundConcerImage);		//创建画笔		Paint paint = new Paint();		//创建一个和原始图片一样大小的矩形		Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());		RectF rectF = new RectF(rect);		// 去锯齿 		paint.setAntiAlias(true);		//画一个和原始图片一样大小的圆角矩形		canvas.drawRoundRect(rectF, roundPixels, roundPixels, paint);		//设置相交模式		paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));		//把图片画到矩形去		canvas.drawBitmap(bitmap, null, rect, paint);		return roundConcerImage;	}}

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