android手势识别

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最新推荐文章于 2024-10-25 13:48:13 发布

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本文介绍了一个基于Android平台的手势识别应用程序实例。通过使用GestureOverlayView组件，实现了手势的捕获与识别，并对接收到的手势进行了匹配与响应操作，如拨打电话和关闭应用等。

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package cn.itcast.gesture;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.gesture.Gesture;
import android.gesture.GestureLibraries;
import android.gesture.GestureLibrary;
import android.gesture.GestureOverlayView;
import android.gesture.Prediction;
import android.net.Uri;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;

public class DemoActivity extends Activity {
	private GestureOverlayView mGestureOverlayView;
	private Gesture  gesture;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		//GestureOverlayView 得到手势层视图控件.
		mGestureOverlayView = (GestureOverlayView) this
				.findViewById(R.id.b );

		//单笔 手势事件的listener   实现接口 GestureOverlayView.OnGesturePerformedListener
//		mGestureOverlayView
//				.addOnGesturePerformedListener(new MyGesturePerformedListener());
//	多笔手势	                  实现接口    GestureOverlayView.OnGestureListener
		mGestureOverlayView.addOnGestureListener(new MyGestureListener());
		
	}

//	多笔手势的手势监听    开始,进行,结束 取消
	private class MyGestureListener implements GestureOverlayView.OnGestureListener{

		public void onGestureStarted(GestureOverlayView overlay,
				MotionEvent event) {
			System.out.println("onGestureStarted");
			
		}

		public void onGesture(GestureOverlayView overlay, MotionEvent event) {
			// TODO Auto-generated method stub
			System.out.println("onGesture");
			
		}

		public void onGestureEnded(GestureOverlayView overlay, MotionEvent event) {
		//
			System.out.println("onGestureEnded");
			//把当前的手势获取出来,得到的是Gesture
			gesture = overlay.getGesture();
			
		}

		public void onGestureCancelled(GestureOverlayView overlay,
				MotionEvent event) {
			System.out.println("onGestureCancelled");
			
		}
		
	}
	
	

	
//	单笔手势的手势监听    完成   
	private class MyGesturePerformedListener implements
			GestureOverlayView.OnGesturePerformedListener {

		public void onGesturePerformed(GestureOverlayView overlay,
				Gesture gesture) {
			// 把已经定义好的手势 转化成一个手势库
			GestureLibrary mLibrary = GestureLibraries.fromRawResource(
					DemoActivity.this, R.raw.gestures);
			// 把手势库加载到内存
			mLibrary.load();
		//	
			recoginizeGesture(gesture, mLibrary);
		}


	}
	//gesture 是自己画的手势.     mLibrary 手势库里面的手势
	private void recoginizeGesture(Gesture gesture, GestureLibrary mLibrary) {
	
	// ，自己写的，获取到手势的在手势库里面的匹配集合
			//gesture自己画的
			//匹配集合,精度从高到低
		ArrayList<Prediction> predictions = mLibrary.recognize(gesture);
//得到最匹配的    Prediction预告的意思
		Prediction prediction = predictions.get(0);
//10要使完全匹配
		if (prediction.score >= 5) {
			if ("close".equals(prediction.name)) {
				System.out.println("关闭的操作 ");
				finish();
				
			} else if ("call".equals(prediction.name)) {
				System.out.println("拨打电话 ");
				Intent intent = new Intent();
				intent.setAction(Intent.ACTION_CALL);
				intent.setData(Uri.parse("tel:5556"));
				startActivity(intent);
			} else if("exit".equals(prediction.name)){
				finish();
			}
		} else {
			System.out.println("手势不能被识别 ");
		}
	}
	// mLibrary.recognize(gesture);
//recognize是一个按钮  );
//
	public void recognize_button(View view) {
		// 把已经定义好的手势 转化成一个手势库
		GestureLibrary mLibrary = GestureLibraries.fromRawResource(
				DemoActivity.this, R.raw.gestures);
		// 把手势库加载到内存
		mLibrary.load();
		//手势识别的方法
		recoginizeGesture(gesture, mLibrary);
	}
}

<pre class="html" name="code"> <android.gesture.GestureOverlayView
        android:id="@+id/gestures"
        android:fadeDuration="2000"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1.0"
        android:gestureStrokeType="multiple" />