20170303 每日一个工具类：Drawable转Bitmap

public static Bitmap drawableToBitmap(Drawable drawable){

Bitmap bitmap = null;
if(drawable==null){
return bitmap;
}
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.createBitmap(w,h,config);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0,0,w,h);
drawable.draw(canvas);
return bitmap;

}

public static Drawable bitmapToDrawable(Bitmap bitmap){
return new BitmapDrawable(bitmap);
}