Android的手势

package com.example.testdectorgestor;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.util.Log;import android.view.GestureDetector;import android.view.GestureDetector.SimpleOnGestureListener;import android.view.Menu;import android.view.MenuItem;import android.view.MotionEvent;import android.view.View;import android.view.View.OnTouchListener;import android.widget.TextView;import android.widget.Toast;/** * 使用步骤： * 1 新建一个类继承自SimpleOnGestureListen,重写需要重写重写的方法 * 2 注册拦截手势触发事件器tv.setOnTouchListener(this); * 3 根据业务逻辑来进行处理 */public class ThirdActivity extends ActionBarActivity implements OnTouchListener {    private GestureDetector detector;    private TextView tv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_third);        detector = new GestureDetector(ThirdActivity.this,                new MyGestureListener());        tv = (TextView) findViewById(R.id.tv);        tv.setOnTouchListener(this);// 注册拦截手势触发事件器        tv.setClickable(true);        tv.setLongClickable(true);    }    // 拦截OnGestureListener触发的事件    @Override    public boolean onTouch(View arg0, MotionEvent arg1) {        return detector.onTouchEvent(arg1);    }    private class MyGestureListener extends SimpleOnGestureListener {        // 用户按下屏幕触发        @Override        public boolean onDown(MotionEvent e) {            Log.e("MyGestureListener", "onDown");            Toast.makeText(ThirdActivity.this, "onDown", 0).show();            return super.onDown(e);        }        @Override        public boolean onDoubleTap(MotionEvent e) {            Log.e("MyGestureListener", "onDoubleTap");            Toast.makeText(ThirdActivity.this, "onDoubleTap", 0).show();            return super.onDoubleTap(e);        }        @Override        public boolean onDoubleTapEvent(MotionEvent e) {            Log.e("MyGestureListener", "onDoubleTapEvent");            Toast.makeText(ThirdActivity.this, "onDoubleTapEvent", 0).show();            return super.onDoubleTapEvent(e);        }        @Override        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,                float velocityY) {            /** * 滑屏，用户按下触摸屏、快速移动后松开，由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE,1个ACTION_UP触发 * 参数解释： e1：第1个ACTION_DOWN MotionEvent * e2：最后一个ACTION_MOVE MotionEvent * velocityX：X轴上的移动速度，像素/秒 * velocityY：Y轴上的移动速度，像素/秒 */            Log.e("MyGestureListener", "onFling");            Toast.makeText(ThirdActivity.this, "onFling", 0).show();            return super.onFling(e1, e2, velocityX, velocityY);        }        // 用户长按屏幕触发        @Override        public void onLongPress(MotionEvent e) {            Log.e("MyGestureListener", "onLongPress");            Toast.makeText(ThirdActivity.this, "onLongPress", 0).show();            super.onLongPress(e);        }        // 用户滑动屏幕触发        @Override        public boolean onScroll(MotionEvent e1, MotionEvent e2,                float distanceX, float distanceY) {            /**onDown-----》onScroll----》onScroll----》onScroll----》………----->onFling * 滑动最后触发了onFling */            Log.e("MyGestureListener", "onScroll:"+(e2.getX()-e1.getX()) +" "+distanceX);            Toast.makeText(ThirdActivity.this, "onScroll", 0).show();            return super.onScroll(e1, e2, distanceX, distanceY);        }        @Override        public void onShowPress(MotionEvent e) {            Log.e("MyGestureListener", "onShowPress");            Toast.makeText(ThirdActivity.this, "onShowPress", 0).show();            super.onShowPress(e);        }        @Override        public boolean onSingleTapConfirmed(MotionEvent e) {            Log.e("MyGestureListener", "onSingleTapConfirmed");            Toast.makeText(ThirdActivity.this, "onSingleTapConfirmed", 0)                    .show();            return super.onSingleTapConfirmed(e);        }        @Override        public boolean onSingleTapUp(MotionEvent e) {            Log.e("MyGestureListener", "onSingleTapUp");            Toast.makeText(ThirdActivity.this, "onSingleTapUp", 0).show();            return super.onSingleTapUp(e);        }    }}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.testdectorgestor.SecondActivity" >    <TextView        android:id="@+id/tv"        android:background="#000000"        android:layout_width="100dp"        android:layout_height="100dp"        android:textColor="#ffffff"        android:gravity="center"        android:layout_centerInParent="true"        android:text="@string/hello_world" /></RelativeLayout>

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