ViewFlipper如何实现Button，ListView的手势滑动

在ViewFlipper中添加Button和ListView后，如何在触摸Button，LitView的item后，实现左右滑动呢？Textview和ImageView是可以左右滑动的，但Button和ListView就不知道如何滑动，现在是在ListView上手势滑动变成了单击，要么就没反应。

Java codeimport android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.OnGestureListener;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ViewFlipper;

public class ViewFlipperTest extends Activity implements OnGestureListener  {
    private Button previous, next;
    private ViewFlipper flipper;
    private GestureDetector detector;
    private Animation slideLeftIn;
    private Animation slideLeftOut;
    private Animation slideRightIn;
    private Animation slideRightOut;
   
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        initiaView();
       
        Button btn = (Button)addButtonByText("Start");
        btn.setLongClickable(true);
        flipper.addView(btn, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
        flipper.addView(addTextByText("Start..."));
        flipper.addView(addImageById(R.drawable.food_gutouwang));
        flipper.addView(addImageById(R.drawable.food_foshanliaoli));
        flipper.addView(addTextByText(">>>End"));
        flipper.addView(addButtonByText("End"),   
                new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));  

    }
   
    /**
     * Initialize view
     */
    private void initiaView(){
        detector = new GestureDetector(this);
       
        previous = (Button) findViewById(R.id.btnPrevious);
        next = (Button) findViewById(R.id.btnNext);
       
        flipper = (ViewFlipper) findViewById(R.id.flipper);
        slideLeftIn = AnimationUtils.loadAnimation(this, R.anim.slide_left_in);
        slideLeftOut = AnimationUtils.loadAnimation(this, R.anim.slide_left_out);
        slideRightIn = AnimationUtils.loadAnimation(this, R.anim.slide_right_in);
        slideRightOut = AnimationUtils.loadAnimation(this, R.anim.slide_right_out);
        flipper.setInAnimation(slideLeftIn);
        flipper.setOutAnimation(slideLeftOut);
       
        previous.setOnClickListener(listener);
        next.setOnClickListener(listener);
    }
   
    private OnClickListener listener = new OnClickListener(){
        public void onClick(View v) {
            // TODO Auto-generated method stub
            switch(v.getId()){
            case R.id.btnPrevious:
                flipper.setInAnimation(slideRightIn);
                flipper.setOutAnimation(slideRightOut);
                flipper.showPrevious();
                break;
               
            case R.id.btnNext:
                flipper.setInAnimation(slideLeftIn);
                flipper.setOutAnimation(slideLeftOut);
                flipper.showNext();
                break;
            }
        }
    };
   
    public View addTextByText(String text){
            TextView tv = new TextView(this);
            tv.setText(text);
            tv.setGravity(1);
            return tv;
    }
   
    public View addImageById(int id){
        ImageView iv = new ImageView(this);
        iv.setImageResource(id);
       
        return iv;
    }
   
    public View addButtonByText(String text){  
        Button btn = new Button(this);  
        btn.setText(text);  
        return btn;
    }
   
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return this.detector.onTouchEvent(event);
    }

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

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        if (e1.getX() - e2.getX() > 120) { // flip from right to left
            flipper.setInAnimation(slideLeftIn);
            flipper.setOutAnimation(slideLeftOut);
            this.flipper.showNext();
            return true;
        } else if (e1.getX() - e2.getX() < -120) { // flip from left to right
            flipper.setInAnimation(slideRightIn);
            flipper.setOutAnimation(slideRightOut);
            this.flipper.showPrevious();
            return true;
        }
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {

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