bitmap drawable byte 转换

/** 将一个图片由Drawable格式转化为 Bitmap格式 */

 

public static Bitmap drawableToBitmap(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;
	}

 

/** 讲byte[] 转换为 bitmap格式 */

 

public static  byte[] bitmap2Bytes(Bitmap bm){
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
		return baos.toByteArray();
	}

 

/**bitmap 转换为 byte[]格式 */

 

public static Bitmap bytes2Bitmap(byte[] bytes){
		if(bytes == null || bytes.length == 0){
			return null;
		}
		return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
	}