HoldingDrawable.java 文件源码

public void setIcon(Bitmap bitmap) {
    if (bitmap != null) {
        mIconWidth = bitmap.getWidth();
        mIconHeight = bitmap.getHeight();
        mIconShader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
        mIconShader.setLocalMatrix(mIconMatrix);
        mIconPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mIconPaint.setShader(mIconShader);
        mIconPaint.setColorFilter(new PorterDuffColorFilter(Color.WHITE, PorterDuff.Mode.SRC_IN));

        invalidateSelf();
    } else {
        mIconWidth = 0;
        mIconHeight = 0;
        mIconShader = null;
        mIconMatrix = null;
        mIconPaint = null;
    }
}