@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Long tsLong = System.currentTimeMillis() / 1000;
    String ts = tsLong.toString();
    Log.i("test", "onCreate()  " + ts);
}

currentCamera = GlobalInfo.getInstance().getCurrentCamera();
cameraPreviewStreamClint = currentCamera.getpreviewStreamClient(); // Line 2

@Override
protected void onResume() {
    super.onResume();
    // this code makes the Activity to recreate! onCreate called twice
    presenter.submitAppInfo();
    presenter.initPreview();
    presenter.initStatus();
    presenter.addEvent();
}