android中bitmap和drawable互相转换

1.Android中Drawable和Bitmap 之间转换 
/** 
* Drawable转化为Bitmap 
*/  
public static Bitmap drawableToBitmap(Drawable drawable) {  
  int width = drawable.getIntrinsicWidth();  
  int height = drawable.getIntrinsicHeight();  
  Bitmap bitmap = Bitmap.createBitmap(width, height, drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);  
  Canvas canvas = new Canvas(bitmap);  
  drawable.setBounds(0, 0, width, height);  
  drawable.draw(canvas);  
  return bitmap;  
 
}  
/**
* Bitmap to Drawable
* @param bitmap
* @param mcontext
* @return
*/
public static Drawable bitmapToDrawble(Bitmap bitmap,Context mcontext){
Drawable drawable = new BitmapDrawable(mcontext.getResources(), bitmap);
return drawable;
}