android手势

一丶首先创建一个手势库

二丶手势实例

1. 布局文件：
   

   在布局文件中有：

   android:id="@+id/gv"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:background="#000000"
   android:gestureStrokeWidth="10"
   android:gestureColor="#ff0000"
   />

2. MainActivity中

   public class MainActivity extends Activity {
   
   private GestureOverlayView gv;//手势控件
   private GestureLibrary gestureLibrary;//加载手势库
   private boolean loadStatus;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   //拿到控件
   gv = (GestureOverlayView) findViewById(R.id.gv);
   //创建加载手势库的工具
   gestureLibrary = GestureLibraries.fromRawResource(this, R.raw.gestures);
   //加载手势库
   loadStatus = gestureLibrary.load();
   //给gv加一个监听器
   //监听一种手势
   gv.addOnGesturePerformedListener(new OnGesturePerformedListener() {
   
   @Override
   public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
   //手势加载成功
   if(loadStatus){
   //识别手势 Prediction(手势相似度）
   ArrayList pres = gestureLibrary.recognize(gesture);
   if(!pres.isEmpty()){
   Prediction pre = pres.get(0);
   if(pre.score > 6){
   if("close".equals(pre.name)){
   finish();
   }else if("tel".equals(pre.name)){
   //打电话
   Intent intent = new Intent();
   intent.setAction(Intent.ACTION_CALL);
   intent.setData(Uri.parse("tel://110"));
   startActivity(intent);
   }else if("right".equals(pre.name)){
   Toast.makeText(getApplicationContext(), "正确", 0).show();
   }
   }else{
   Toast.makeText(getApplicationContext(), "手势不匹配", 0).show();
   }
   }else{
   Toast.makeText(MainActivity.this, "手势库加载失败", 0).show() ;
   }
   
   }
   }
   });
   }
   }