[Android] ขอคำแนะนำผู้รู้ Viewpager สไลด์ขึ้นหรือลงแล้วปิด Activity

public class ActivityName extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // remove title
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.main);
    }
}

<activity android:name=".ActivityName"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.AppCompat.Light.NoActionBar"/>