private static final String SAVE_PIC_PATH = Environment.getExternalStorageState().equalsIgnoreCase(Environment.MEDIA_MOUNTED) ? Environment.getExternalStorageDirectory().getAbsolutePath() :
      "/mnt/sdcard";//保存到SD卡
  private static final String SAVE_REAL_PATH = SAVE_PIC_PATH + "/good/savePic";

   //保存的确切位置，根据自己的具体需要来修改

public void saveFile(Bitmap bm, String fileName, String path) throws IOException {
    String subForder = SAVE_REAL_PATH + path;
    File foder = new File(subForder);
    if (!foder.exists()) {
      foder.mkdirs();
    }
    File myCaptureFile = new File(subForder, fileName);
    if (!myCaptureFile.exists()) {
      myCaptureFile.createNewFile();
    }
    BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(myCaptureFile));
    bm.compress(Bitmap.CompressFormat.JPEG, 80, bos);
    bos.flush();
    bos.close();
    Toast.makeText(this, "保存成功", Toast.LENGTH_SHORT).show();

MediaScannerConnection.scanFile(this, new String[]{SAVE_REAL_PATH+ "/" + fileName}, null, new MediaScannerConnection.OnScanCompletedListener() {
      @Override
      public void onScanCompleted(String path, Uri uri) {
        Log.e( "onScanCompleted: ", path);
        Log.e( "onScanCompleted: ", uri.toString());
      }
    });

Intent intent = new Intent(Intent.ACTION_MEDIA_MOUNTED); //这是刷新SD卡
//    Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);  // 这是刷新单个文件
    Uri uri = Uri.fromFile(new File(SAVE_REAL_PATH));
    intent.setData(uri);
    sendBroadcast(intent);