DialogAdapter.java 文件源码

private Drawable icon(Drawable drawable) {
    if (drawable != null) {
        Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
        @SuppressWarnings("SuspiciousNameCombination")
        Drawable resizeIcon = new BitmapDrawable(context.getResources(), Bitmap.createScaledBitmap(bitmap, leftIcon, leftIcon, true));
        Drawable.ConstantState state = resizeIcon.getConstantState();
        resizeIcon = DrawableCompat.wrap(state == null ? resizeIcon : state.newDrawable().mutate());
        return resizeIcon;
    }
    return null;
}