Android 用手勢切換activity

package rw.gest;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.LinearLayout;
import android.widget.Toast;
public class Gest01Activity extends Activity{

GestureDetector detector;
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    detector=new GestureDetector(new GestureListener());
    LinearLayout layout=(LinearLayout)findViewById(R.id.linearlayout);
    layout.setOnTouchListener(new TouhListener());
    layout.setLongClickable(true);

}

//觸摸屏幕監聽
    class TouhListener implements OnTouchListener{

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        // TODO Auto-generated method stub
        Toast.makeText(getApplicationContext(), "----?", event.getAction()).show();
        return detector.onTouchEvent(event);
    }

}
//手勢滑動監聽
class GestureListener implements OnGestureListener{

    @Override
    public boolean onDown(MotionEvent e) {
        // TODO Auto-generated method stub
    /*
     * 當觸摸屏幕是使用這個函數
     */
        Toast.makeText(getApplicationContext(), "-----------> onDown", Toast.LENGTH_LONG).show();
        return false;
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        // e1 觸摸的起始位置，e2 觸摸的結束位置，velocityX X軸每一秒移動的像素速度（大概這個意思） velocityY 就是Ｙ咯
        //手勢左,上為正 ——，右，下為負正
        if (e2.getX()-e1.getX()>50) {
            //為什么是50？ 這個根據你的模擬器大小來定，看看模擬器寬度，e2.getX()-e1.getX()<屏幕寬度就ＯＫ
            Toast.makeText(getApplicationContext(), "向右滑動", Toast.LENGTH_LONG).show();
            //要觸發什么事件都在這里寫就OK 
            //如果要跳轉到另外一個activity
            Intent intent=new Intent(Gest01Activity.this, toActivity.class);
            startActivity(intent);
        }
        if (Math.abs(e2.getX()-e1.getX())>50) {
            Toast.makeText(getApplicationContext(), "向左滑動", Toast.LENGTH_LONG).show();
        }
        if (Math.abs(e2.getY()-e1.getY())>50) {
            Toast.makeText(getApplicationContext(), "向上滑動", Toast.LENGTH_LONG).show();
        }
        if (e2.getY()-e1.getY()>50) {
            Toast.makeText(getApplicationContext(), "向下滑動", Toast.LENGTH_LONG).show();
        }
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        // TODO Auto-generated method stub\
      /*
       * 長按事件  一切長事件按屏幕想要觸發的事件都在這里寫
       */
        Toast.makeText(getApplicationContext(), "------------> onLongPress", Toast.LENGTH_LONG).show();
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2,
            float distanceX, float distanceY) {
        // TODO Auto-generated method stub
        /*
         * 這個函數大概是這樣，英語差了，有誤差。distanceX 是X軸路徑長度，distanceY 是Y軸路徑長度（注意：是路徑，不是位移）;
         */
        Toast.makeText(getApplicationContext(), "------------> onScroll", Toast.LENGTH_LONG).show();
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        // TODO Auto-generated method stub
        /*
         * 
         */
        Toast.makeText(getApplicationContext(), "------------> onShowPress", Toast.LENGTH_LONG).show();
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        // TODO Auto-generated method stub
        Toast.makeText(getApplicationContext(), "------------> onSingleTapUp", Toast.LENGTH_LONG).show();
        return false;
    }

}

}</pre>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="

android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
 android:id="@+id/linearlayout"
>


<ImageView android:src="@drawable/eight" android:id="@+id/imageView1" android:layout_height="match_parent" android:layout_width="match_parent"></ImageView>
</LinearLayout></pre>

先上代碼再看圖，解釋在代碼中.............

 

轉自：http://blog.csdn.net/rwyz1314/article/details/6684660