imageView.setOnLongClickListener(new LongClickHandler());

class LongClickHandler implements View.OnLongClickListener{
        @Override
        public boolean onLongClick(View view) {
            LogHelper.ShowLog("LongClickHandler");
            boolean bRet = PublicUtil.SaveJpg((ImageView) view);
            if(bRet){
                Toast.makeText(getContext(), "图片保存成功", Toast.LENGTH_SHORT).show();
            }
            else{
                Toast.makeText(getContext(), "图片保存失败", Toast.LENGTH_SHORT).show();
            }
            return true;
        }
    }


public static boolean SaveJpg(ImageView view) {

        try{
            Drawable drawable = view.getDrawable();
            if (drawable == null) {
                return false;
            }

            ContentValues values = new ContentValues();
            values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");

            Uri dataUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
            Uri fileUri = view.getContext().getContentResolver().insert(dataUri, values);

            // 如果保存不成功，insert没有任何错误信息，此时调用update会有错误信息提示
//            view.getContext().getContentResolver().update(dataUri, values, "", null);

            if(fileUri == null){
                LogHelper.ShowLog("fileUri == null");
                return false;
            }

            OutputStream outStream = view.getContext().getContentResolver().openOutputStream(fileUri);

            Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
            outStream.flush();
            outStream.close();

            // 刷新相册
            /*
            String[] files = new String[1];
            String[] mimeTypes = new String[1];
            files[0] = filePath;
            mimeTypes[0] = "image/jpeg";
            MediaScannerConnection.scanFile(view.getContext(), files, mimeTypes, null);
            */
            view.getContext().sendBroadcast(new Intent("com.android.camera.NEW_PICTURE", fileUri));

            LogHelper.ShowLog("保存图片到相册完毕...");
            return true;

        }
        catch (IOException ex) {
            LogHelper.ShowException(ex);
        }
        return false;
    }