Android将drawable图像转化为二进制字节数组与逆转换

          首先是将图像转换为二进制字节数组进行存储

// ------------------------将drawable 图像转化成二进制字节----------------public  synchronized  byte[] drawableToByte(Drawable drawable) {if (drawable != null) {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);int size = bitmap.getWidth() * bitmap.getHeight() * 4;// 创建一个字节数组输出流,流的大小为sizeByteArrayOutputStream baos = new ByteArrayOutputStream(size);// 设置位图的压缩格式，质量为100%，并放入字节数组输出流中bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);// 将字节数组输出流转化为字节数组byte[]byte[] imagedata = baos.toByteArray();return imagedata;}return null;}

下面是将二进制字节数组进行转换为drawable图像对象.

 public synchronized Drawable byteToDrawable(byte[] img) {Bitmap bitmap;if (img != null) {bitmap = BitmapFactory.decodeByteArray(img,0, img.length);Drawable drawable = new BitmapDrawable(bitmap);            return drawable;}return null;}

这个方法应该在开发中会经常用到,留给大家吧!

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