Android OnGestureListener用法 識別用戶手勢 左右滑動

Android可以識別用戶的手勢（即用戶用手指滑動的方向），通過用戶不同的手勢，從而做出不同的處理

需要使用OnGestureListener

比如說看電子書的時候翻頁，或者要滑動一些其他內容

直接上代碼

界面文件

main.xml

<?xml version="1.0" encoding="utf-8"?>   
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="vertical"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    android:id="@+id/ll"  
    >   
<TextView     
       
    android:layout_width="fill_parent"    
    android:layout_height="wrap_content"    
    android:text="@string/hello"  
    />   
</LinearLayout>  

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/ll"
    >
<TextView  
    
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
</LinearLayout>

主Activity

package zy.lucifer.testGesture;   
import android.app.Activity;   
import android.os.Bundle;   
import android.util.Log;   
import android.view.GestureDetector;   
import android.view.MotionEvent;   
import android.view.View;   
import android.view.GestureDetector.OnGestureListener;   
import android.view.View.OnTouchListener;   
import android.widget.LinearLayout;   
import android.widget.TextView;   
import android.widget.Toast;   
public class testGesture extends Activity implements OnTouchListener,   
        OnGestureListener {   
    GestureDetector mGestureDetector;   
    private static final int FLING_MIN_DISTANCE = 50;   
    private static final int FLING_MIN_VELOCITY = 0;   
    /** Called when the activity is first created. */  
    @Override   
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);   
        setContentView(R.layout.main);   
        mGestureDetector = new GestureDetector(this);   
        LinearLayout ll=(LinearLayout)findViewById(R.id.ll);   
        ll.setOnTouchListener(this);   
        ll.setLongClickable(true);   
    }   
    @Override   
    public boolean onTouch(View v, MotionEvent event) {   
        // TODO Auto-generated method stub   
        Log.i("touch","touch");   
         return mGestureDetector.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) {   
        // TODO Auto-generated method stub   
         if (e1.getX()-e2.getX() > FLING_MIN_DISTANCE    
                    && Math.abs(velocityX) > FLING_MIN_VELOCITY) {    
                // Fling left    
                Toast.makeText(this, "向左手勢", Toast.LENGTH_SHORT).show();    
            } else if (e2.getX()-e1.getX() > FLING_MIN_DISTANCE    
                    && Math.abs(velocityX) > FLING_MIN_VELOCITY) {    
                // Fling right    
                Toast.makeText(this, "向右手勢", Toast.LENGTH_SHORT).show();    
            }    
            return false;    
    }   
    @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;   
    }   
}