android GestureDetector简单手势检测（左右滑动、上下滑动）-优快云博客

本文链接：https://blog.youkuaiyun.com/lyyybz/article/details/106565921

本文介绍了一个简单的手势检测实现案例，通过自定义GestureDetector处理各种手势动作，并在日志中记录下来。该示例适用于Android平台。

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在这个例子中，我们只为演示对手势的检测，对于检测出的手势不做特殊处理，只在日志打印出检测到的结果。

1.activity_main.xml

<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="cn.sehzh.gesture.MainActivity" >  
  
    <TextView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="@string/hello_world" />  
  
</RelativeLayout>

2.MainActivity

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 MainActivity extends Activity {  
    protected static final float FLIP_DISTANCE = 50;  
    GestureDetector mDetector;  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
  
        mDetector = new GestureDetector(this, new OnGestureListener() {  
  
            @Override  
            public boolean onSingleTapUp(MotionEvent e) {  
                // TODO Auto-generated method stub  
                return false;  
            }  
  
            @Override  
            public void onShowPress(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 onLongPress(MotionEvent e) {  
                // TODO Auto-generated method stub  
  
            }  
  
            /** 
             *  
             * e1 The first down motion event that started the fling. e2 The 
             * move motion event that triggered the current onFling. 
             */  
            @Override  
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {  
                if (e1.getX() - e2.getX() > FLIP_DISTANCE) {  
                    Log.i("MYTAG", "向左滑...");  
                    return true;  
                }  
                if (e2.getX() - e1.getX() > FLIP_DISTANCE) {  
                    Log.i("MYTAG", "向右滑...");  
                    return true;  
                }  
                if (e1.getY() - e2.getY() > FLIP_DISTANCE) {  
                    Log.i("MYTAG", "向上滑...");  
                    return true;  
                }  
                if (e2.getY() - e1.getY() > FLIP_DISTANCE) {  
                    Log.i("MYTAG", "向下滑...");  
                    return true;  
                }  
  
                Log.d("TAG", e2.getX() + " " + e2.getY());  
  
                return false;  
            }  
  
            @Override  
            public boolean onDown(MotionEvent e) {  
                // TODO Auto-generated method stub  
                return false;  
            }  
        });  
    }  
  
    @Override  
    public boolean onTouchEvent(MotionEvent event) {  
        return mDetector.onTouchEvent(event);  
    }  
}

3.日志结果

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