自定义手势_GestureOverlayVIew

xml文件：

<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.android_gestureoverlayview.MainActivity" >

    <android.gesture.GestureOverlayView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/gestureOverlayView"
        >
    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/ic_launcher"/>
    </android.gesture.GestureOverlayView>
</RelativeLayout>

源代码：

package com.example.android_gestureoverlayview;

import java.util.ArrayList;

import android.app.Activity;
import android.gesture.Gesture;
import android.gesture.GestureLibraries;
import android.gesture.GestureLibrary;
import android.gesture.GestureOverlayView;
import android.gesture.GestureOverlayView.OnGesturePerformedListener;
import android.gesture.Prediction;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
/**
 * GestureOverlayView:
 * 1.使用安卓自带的文件Gestures Builder生成手势文件(D:\JDK\Android SDK\samples\android-15\GestureBuilder)
 *         Gestures Builder一般在sdk中（生成手势文件）
 *     1.1.导入：File-New-Android-Android Sample project
 *     1.2.安装：将该项目安装到模拟器中，进行手势的自定义添加
 *     1.3.在虚拟机的mnt/sdcard--(shell/emulated/0)中找到gestures文件，该文件包含自定义手势，将文件导出
 * 2.加入项目
 *     2.1新建一个文件夹res//raw，将gestures文件加入
 * 3.GestureOverlayView
 *     3.1一种手势输入的透明覆盖层，可覆盖在其他控件的上方，也可包含其他控件，存在3个监听器接口
 *         GestureOverlayView.OnGestureListener    手势监听器
 *         GestureOverlayView.OnGesturePerformedListener    手势执行监听器
 *         GestureOverlayView.OnGesturingListener    手势执行中监听器
 *
 *
 */
public class MainActivity extends Activity {
    private GestureOverlayView gestureOverlayView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gestureOverlayView = (GestureOverlayView) findViewById(R.id.gestureOverlayView);
        /**
         * 执行以下步骤：
         * 1.找到刚才的预设定的手势文件
         * 2.加载那个手势文件中的所有手势
         * 3.匹配 识别
         */
        //从资源中将手势库文件加载进来
        final GestureLibrary library = GestureLibraries.fromRawResource(MainActivity.this, R.raw.gestures);
        library.load();
        //GestureOverlayView.OnGesturePerformedListene 手势执行监听器
        gestureOverlayView.addOnGesturePerformedListener(new OnGesturePerformedListener() {

            @Override
            public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
                // TODO Auto-generated method stub
                //读出手势库内容 识别手势    Prediction 预测
                ArrayList<Prediction> mygesture = library.recognize(gesture);
                Prediction prediction = mygesture.get(0);
                //prediction 里面有两个参数 name,score(0.0-10)(相似度)值越大，要求越严格
                if(prediction.score >= 5.0){
                    if(prediction.name.equals("exit")){
                        System.exit(0);
                    }else if(prediction.name.equals("privious")){
                        Toast.makeText(MainActivity.this, "播放上一首", Toast.LENGTH_SHORT).show();
                    }else if(prediction.name.equals("next")){
                        Toast.makeText(MainActivity.this, "播放下一首", Toast.LENGTH_SHORT).show();
                    }
                }else{
                    Toast.makeText(MainActivity.this, "没有该手势", 1).show();
                }
            }
        });

    }

}