将活动滑动到新活动（双方）onFling错误

Question

我想在双方放置新活动，即在左侧滑动' activity2 '，右滑动' activity3 '

我尝试了很多次，但它只适用于一方。 即左滑动工作正常，但是没有，如果我复制并更改代码中的一些内容，它会给我 onFling 错误。

我错过了什么？

import android.content.Intent;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v4.view.GestureDetectorCompat;
import android.view.GestureDetector;
import android.view.WindowManager;
import android.view.MotionEvent;

public class Account extends AppCompatActivity {

private GestureDetectorCompat gestureObject;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

    setContentView(R.layout.activity_account);
    MediaPlayer Player = MediaPlayer.create (this, R.raw.wonder);
    Player.start();

    gestureObject = new GestureDetectorCompat(this, new LearnGesture());
}

@Override
public boolean onTouchEvent (MotionEvent event) {
    this.gestureObject.onTouchEvent(event);
    return super.onTouchEvent(event);
}

class LearnGesture extends GestureDetector.SimpleOnGestureListener {

    @Override
    public boolean onFling(MotionEvent event1, MotionEvent event2,
                           float velocityX, float velocityY) {

        if (event2.getX() > event1.getX()) {

            Intent intent = new Intent(
                    Account.this, Settings.class);
            finish();
            startActivity(intent);
            overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_left);

        } else if (event2.getX() < event1.getX()) {
        }
        return true;
    }
            public boolean onFling(MotionEvent event1, MotionEvent event3,
                           float velocityX, float velocityY) {

        if (event3.getX() > event1.getX()) {

            Intent intent = new Intent(
                    Account.this, Achievement.class);
            finish();
            startActivity(intent);
            overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_left);

        } else if (event3.getX() < event1.getX()) {
        }
        return true;
    }

}

}