Bitmap -- Drawable

1:BitmapDrawable bd= new BitmapDrawable(bitmap)

Bitmap -- byte[]

1:private byte[] bitmap2Bytes(Bitmap bitmap) {ByteArrayOutputStream baos = new ByteArrayOutputStream();bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);return baos.toByteArray();}

Drawable -- Bitmap

1:Bitmap bitmap = ((BitmapDrawable) getResources().getDrawable(R.drawable.icon)).getBitmap();2:private Bitmap drawable2Bitmap(Drawable drawable) {Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight(),drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);Canvas canvas = new Canvas(bitmap);drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());drawable.draw(canvas);return bitmap;}

byte[] -- Bitmap

1:public Bitmap bytes2Bimap(byte[] bytes) {if (bytes.length != 0) {return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);} else {return null;}}

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