ACache.java 文件源码

private static Bitmap drawable2Bitmap(Drawable drawable) {
    if (drawable == null) {
        return null;
    }

    int w = drawable.getIntrinsicWidth();
    int h = drawable.getIntrinsicHeight();

    Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
            : Bitmap.Config.RGB_565;

    Bitmap bitmap = Bitmap.createBitmap(w, h, config);

    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, w, h);

    drawable.draw(canvas);
    return bitmap;
}