带有位图标记的Android XML可绘制圆角

我用这个函数制作圆角：

    public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {        Bitmap output = Bitmap.createBitmap(bitmap.getWIDth(),bitmap.getHeight(),Config.ARGB_8888);        Canvas canvas = new Canvas(output);        final int color = 0xff424242;        final Paint paint = new Paint();        final Rect rect = new Rect(0,bitmap.getWIDth(),bitmap.getHeight());        final RectF rectF = new RectF(rect);        final float roundPx = 12;        paint.setAntiAlias(true);        canvas.drawARGB(0,0);        paint.setcolor(color);        canvas.drawRoundRect(rectF,roundPx,paint);        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));        canvas.drawBitmap(bitmap,rect,paint);        return output ;      }     

最后,活动中的代码：

public voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.menu);    // i use a relative Layout      relativeLayout rl = (relativeLayout) findVIEwByID(R.ID.rlmenu);    // Obtain then backgroud of relativeLayout    LayerDrawable layer = (LayerDrawable) rl.getBackground();    // obtain the image set in the Layer    BitmapDrawable bg = (BitmapDrawable) layer.getDrawable(1);    // create a new BitmapDrawable from the function    Drawable d =new BitmapDrawable(getRoundedCornerBitmap(bg.getBitmap()));    // set the new roundcorner image in the layer    layer.setDrawableByLayerID(1,d);    rl.setBackgroundDrawable(d);}