Android Gesture 手势创建以及使用示例

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:paddingBottom="@dimen/activity_vertical_margin"
 6     android:paddingLeft="@dimen/activity_horizontal_margin"
 7     android:paddingRight="@dimen/activity_horizontal_margin"
 8     android:paddingTop="@dimen/activity_vertical_margin"
 9     tools:context="com.xunfang.gesture.MainActivity" >
10 
11     <android.gesture.GestureOverlayView 
12         android:id="@+id/gv"
13         android:layout_width="match_parent"
14         android:layout_height="match_parent"
15         android:background="#000000"
16         android:gestureStrokeWidth="10"
17         android:gestureColor="#ff0000"
18         />
19    
20 
21 </RelativeLayout>

GestureOverlayView：一种用于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。
Android:gestureStrokeType 定义笔画（定义为手势）的类型
Android:gestureStrokeWidth 画手势时，笔划的宽度

activity文件内容如下

 1 package com.xunfang.gesture;
 2 
 3 import java.util.ArrayList;
 4 
 5 import android.app.Activity;
 6 import android.content.Intent;
 7 import android.gesture.Gesture;
 8 import android.gesture.GestureLibraries;
 9 import android.gesture.GestureLibrary;
10 import android.gesture.GestureOverlayView;
11 import android.gesture.Prediction;
12 import android.net.Uri;
13 import android.os.Bundle;
14 import android.view.MotionEvent;
15 import android.widget.Toast;
16 
17 public class MainActivity extends Activity {
18 
19     private GestureOverlayView gv ;
20     
21     private boolean loadStatus ;
22     
23     private GestureLibrary gestureLibrary ;
24     @Override
25     protected void onCreate(Bundle savedInstanceState) {
26         super.onCreate(savedInstanceState);
27         setContentView(R.layout.activity_main);
28         
29         //拿到控件
30         gv = (GestureOverlayView) findViewById(R.id.gv) ;
31         
32         //创建加载手势库的工具
33         gestureLibrary =  GestureLibraries.fromRawResource(this, R.raw.gestures) ;
34         //加载手势库
35         loadStatus = gestureLibrary.load() ;
36         
37         //给gv控件加一个监听器
38         //OnGesturePerformedListener监听器监听一种手势(一笔画完)
39         gv.addOnGesturePerformedListener(new GestureOverlayView.OnGesturePerformedListener(){
40 
41             @Override
42             public void onGesturePerformed(GestureOverlayView overlay,
43                     Gesture gesture) {
44                 
45                 //如果手势库加载成功
46                 if(loadStatus){
47                     //识别手势  Prediction是一个相似度对象,集合中的相似度是从高到低进行排列
48                      ArrayList<Prediction> pres = gestureLibrary.recognize(gesture) ;
49                      if(!pres.isEmpty()){
50                          //拿到相似度最高的对象
51                          Prediction pre = pres.get(0) ;
52                          //用整型的数表示百分比  >60%
53                          if(pre.score > 6){
54                              //拿到手势的名字判断进行下一步逻辑
55                              if("94".equals(pre.name)){
56                                  //说明想关掉当前的activity
57                                  finish() ;
58                              }else if("yes".equals(pre.name)){
59                                  //说明想打电话了
60                                  Intent intent = new Intent() ;
61                                  intent.setAction(Intent.ACTION_CALL) ;
62                                  intent.setData(Uri.parse("tel://110")) ;
63                                  startActivity(intent) ;
64                              }else if("666".equals(pre.name)){
65                                  //说明你想弹一个土司
66                                  Toast.makeText(MainActivity.this, "哈哈,我弹出来了", 0).show() ;
67                              }
68                          }else{
69                              Toast.makeText(MainActivity.this, "手势不匹配", 0).show() ;
70                          }
71                      }else{
72                          Toast.makeText(MainActivity.this, "手势库加载失败", 0).show() ;
73                      }
74                 }
75             }
76         }) ;
77