问Android -在特定视图上的手势检测(向上/向下滑动)

EN

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rlMain"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

    <TextView
        android:id="@+id/tvOne"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="5dp"
        android:gravity="center"
        android:text="One" />

    <TextView
        android:id="@+id/tvTwo"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/tvOne"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="5dp"
        android:gravity="center"
        android:text="Two" />

    <TextView
        android:id="@+id/tvThree"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/tvTwo"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="5dp"
        android:gravity="center"
        android:text="Three" />

</RelativeLayout>

    import android.app.Activity;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.GestureDetector;
    import android.view.GestureDetector.OnGestureListener;
    import android.view.MotionEvent;

    public class TimeActivity extends Activity implements OnGestureListener {

    GestureDetector gestureScanner;

    @SuppressWarnings("deprecation")
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.wheelview);
        gestureScanner = new GestureDetector(this);

    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // TODO Auto-generated method stub
        return gestureScanner.onTouchEvent(event);
    }

    @Override
    public boolean onDown(MotionEvent e) {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        // TODO Auto-generated method stub
        Log.i("Test", "On Fling");
        return true;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
            float distanceY) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }
}