AVQuery avQuery = new AVQuery<>("user");
avQuery.whereEqualTo("userAccount", username);
avQuery.whereEqualTo("userPassword", pwd);
avQuery.findInBackground().subscribe(new Observer>() {
@Override
public void onSubscribe(Disposable d) {
Log.d("Login", "onSubscribe");
}

        @Override
        public void onNext(List<AVObject> list) {
            Log.d("Login", "onNext");
            Log.d("Login", list.toString());
            phone = list.get(0).getString("userPhone");
            Log.d("Login", phone);
            writeInfo();
            Intent intent = new Intent(LoginActivity.this, NotificationActivity.class);
            startActivity(intent);
            Log.d("Login", "onNextEnd");
        }

        @Override
        public void onError(Throwable e) {
            Log.d("Login", "onError" + e.getMessage());
        }

        @Override
        public void onComplete() {
            Log.d("Login", "onComplete");
        }
    });

user是我自己建的一个用户表，我不想用_User这个系统表