RoundedImageView.java 文件源码

@Override
protected void onDraw(Canvas canvas) {
    Log.d("ONDRAW", "onDraw called ");
    Drawable drawable = getDrawable();

    if (drawable == null) {
        return;
    }

    if (getWidth() == 0 || getHeight() == 0) {
        return;
    }

    Bitmap b = null;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP
            && drawable instanceof VectorDrawable) {
        ((VectorDrawable) drawable).draw(canvas);
        b = Bitmap.createBitmap(canvas.getWidth(), canvas.getHeight(), Config.ARGB_8888);
        Canvas c = new Canvas();
        c.setBitmap(b);
        drawable.draw(c);
    }
    else {
        b = ((BitmapDrawable) drawable).getBitmap();
    }

    Bitmap bitmap = b.copy(Config.ARGB_8888, true);

    int w = getWidth(), h = getHeight();

    //Bitmap roundBitmap =  getCroppedBitmap(bitmap, w);
    //Bitmap roundBitmap = blur(bitmap, 50, 220);
    //canvas.drawBitmap(roundBitmap, 0,0, null);
    super.onDraw(canvas);
    Bitmap ors = this.getDrawingCache();

    Bitmap or = blur(ors, 20, (int)(0.3 * ors.getHeight()));
    canvas.drawBitmap(or, 0,0, null);
}