android 根据图片的URI获取对应的图片

private byte[] mContent;  

  Bitmap myBitmap; 

ContentResolver resolver = getContentResolver(); 

  try { 
                //获得图片的uri 
                Uri originalUri = data.getData(); 
                //将图片内容解析成字节数组 
                mContent=readStream(resolver.openInputStream(Uri.parse(originalUri.toString()))); 
                //将字节数组转换为ImageView可调用的Bitmap对象 
                myBitmap = getPicFromBytes(mContent, null); 
                ////把得到的图片绑定在控件上显示 
                imageView.setImageBitmap(myBitmap); 
            } catch (Exception e) { 
                System.out.println(e.getMessage());