Android使用GestureOverlayView控件实现手势识别

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:orientation="vertical" >   <android.gesture.GestureOverlayView   android:id="@+id/gestures"   android:layout_width="fill_parent"   android:layout_height="0dip"   android:layout_weight="1.0"   android:gestureStrokeType="multiple" />  </LinearLayout> 

public class MainActivity extends Activity {  private boolean success;  // 定义手势库  private GestureLibrary library;  private GestureOverlayView gestureView;   @Override  public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.main);   // 找到手势库   library = GestureLibraries.fromRawResource(this, R.raw.gestures);   // 加载手势库   success = library.load();   gestureView = (GestureOverlayView) this.findViewById(R.id.gestures);   // 添加事件监听器   gestureView.addOnGesturePerformedListener(new GestureListener());  }   private final class GestureListener implements OnGesturePerformedListener {   @Override   public void onGesturePerformed(GestureOverlayView overlay,     Gesture gesture) {    // 如果手势库加载成功    if (success) {     // 从手势库中查找匹配的手势,最匹配的记录会放在最前面     ArrayList<Prediction> predictions = library.recognize(gesture);     if (!predictions.isEmpty()) {      // 获取第一个匹配的手势      Prediction prediction = predictions.get(0);      // 如果匹配度>30%，就执行下面的操作      if (prediction.score > 3) {       // 关闭应用       if ("agree".equals(prediction.name)) {        android.os.Process.killProcess(android.os.Process          .myPid());       // 拨打电话       } else if ("5556".equals(prediction.name)) {        Intent intent = new Intent(Intent.ACTION_CALL,          Uri.parse("tel:5556"));        startActivity(intent);       }      }     }    }   }   } }