bitmap和drawable转换

1.     // Drawable转换成Bitmap  
2.     public Bitmap drawableToBitmap(Drawable drawable) {  
3.         Bitmap bitmap = Bitmap  
4.                 .createBitmap(  
5.                         drawable.getIntrinsicWidth(),  
6.                         drawable.getIntrinsicHeight(),  
7.                         drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888  
8.                                 : Bitmap.Config.RGB_565);  
9.         Canvas canvas = new Canvas(bitmap);  
10.         drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),  
11.                 drawable.getIntrinsicHeight());  
12.         drawable.draw(canvas);  
13.         return bitmap;  
14.     }  
15.   
16.     // Bitmap转换成Drawable  
17.     public Drawable bitmapToDrawable(Bitmap bitmap) {  
18.         BitmapDrawable bd = new BitmapDrawable(bitmap);  
19.         Drawable d = (Drawable) bd;  
20.         return d;  
21.     }  
22. }