@Override
 protected void onDestroy() {
   super.onDestroy();
   endTime = new Date();
   GetHtml.sendInfo2ServerByThread(
       Tool.getActivitydurationInfo2Server(this.getClass().getSimpleName(), startTime, endTime));
 }
  @Override
  public void onClick(View v) {

    switch (v.getId()) {
      case R.id.confirm_feedback_button:
        String title = title_edittext.getText().toString().trim();
        String content = content_edittext.getText().toString().trim();
        String contact = contact_edittext.getText().toString().trim();

        Log.d("Send2Server", Tool.getfeedbackInfo2Server(title, content, contact));
        GetHtml.sendInfo2ServerByThread(Tool.getfeedbackInfo2Server(title, content, contact));

        break;
    }
  }