public static int SavePhoto(String filePath, String fileNmae) {
    if (ActivityCompat.checkSelfPermission(AndroidPlugin.instance, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            String[] mPermissionList = new String[]{
                    Manifest.permission.WRITE_EXTERNAL_STORAGE,
            };
            if (ActivityCompat.shouldShowRequestPermissionRationale(AndroidPlugin.instance, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                ActivityCompat.requestPermissions(instance, mPermissionList, SdkConst.req_code_permission_writestorage);
                return 2;//忽略
            }
            else
            {
                ActivityCompat.requestPermissions(instance, mPermissionList, SdkConst.req_code_permission_writestorage);
                return 0;
            }
        }
    }

    instance.runOnUiThread(new Runnable() {
        public void run() {
            Bitmap bitmap = BitmapFactory.decodeFile(filePath);

            File file = new File(Environment.getExternalStorageDirectory()
                    + "/Pictures", fileNmae);

            FileOutputStream fos = null;
            try {
                fos = new FileOutputStream(file);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                Log.w("unity", e.toString());
            }
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);

            try {
                fos.flush();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                Log.w("cat", e.toString());
            }
            try {
                fos.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                Log.w("cat", e.toString());
            }
            bitmap.recycle();//扫描保存的图片
            instance.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + Environment.getExternalStorageDirectory()
                    + "/Pictures/" + fileNmae)));

        }
    });

    return 1;
}