Conversion between Android drawable, Bitmap, byte[]

Transfer from http://blog.csdn.net/june5253/article/details/7826597

1, bitmap-->drawable

Bitmap Drawable2bitmap (drawable drawable) {if(drawableinstanceofbitmapdrawable) {              return((bitmapdrawable) drawable). Getbitmap (); } Else if(drawableinstanceofninepatchdrawable) {Bitmap Bitmap=Bitmap. CreateBitmap (Drawable.getintrinsicwidth (), Drawable.getintrinsicheight (), drawable.getopacity ()! = Pixelformat.opaque?Bitmap.Config.ARGB_8888:Bitmap.Config.RGB_565); Canvas Canvas=NewCanvas (bitmap); Drawable.setbounds (0, 0, Drawable.getintrinsicwidth (), Drawable.getintrinsicheight ());              Drawable.draw (canvas); returnbitmap; } Else {              return NULL; }      }

2. Drawable-->bitmap obtained from the resources

Bitmap Bitmap=bitmapfactory.decoderesource (res,r.drawable.pic);

3, Bitmap-->drawable

drawable bitmap2drawable (Bitmap Bitmap) {  new  bitmapdrawable (Bitmap);  }

4, bitmap-->byte[]

byte [] bitmap2bytes (Bitmap BM) {          new  bytearrayoutputstream ();           , BAOs);           return Baos.tobytearray ();      }

5, Byte[]-->bitmap

Bitmap bytes2bimap (byte[] b) {          if (b.length! = 0)              {return Bitmapfactory.decodebytearray (b, 0, b.length);           Else {              returnnull;          }      }

Conversion between Android drawable, Bitmap, byte[]