android 之GestureOverlayView手势识别

android 之GestureOverlayView可以轻松实现手势比划的识别，使用自己的手势库与之匹配，下面是一个小例子：
首先打开android SDK安装路径，还原AndroidGestureDetector项目，此项目可以为我们生成手势库，并把手势库文件村房子SD卡的根路径下，我的项目路径为 D:\android-sdk-windows\samples\android-10\GestureBuilder，
注意，打开项目并为之添加三个文件才能添加到环境中，.classpath、.project、default.properties，这项文件到其他android项目中去拷贝就OK啦，
android 之GestureOverlayView手势识别

然后在项目中录入手势和与之对应的名称，并把生成的手势库文件拷贝出来，添加至替他工程。

另建工程GesturesText

main.xml

<LinearLayout 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:orientation="vertical"    tools:context=".MainActivity" >    <android.gesture.GestureOverlayView        android:id="@+id/gesture"        android:layout_width="match_parent"        android:layout_height="match_parent"/>    </LinearLayout>

string.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="app_name">GesturesText</string>    <string name="menu_settings">Settings</string>    <string name="hello_world">Hello world!</string><string name="nofind">没有找到匹配项</string><string name="low">匹配度太低</string></resources>

在工程res路径下新建raw文件夹，并将生成的手势库文件添加至文件夹。
MainActivity.java

package com.gesturestext.example;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.GestureOverlayView.OnGesturePerformedListener;import android.gesture.Prediction;import android.net.Uri;import android.os.Bundle;import android.widget.Toast;public class MainActivity extends Activity {private GestureLibrary libraries;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);libraries = GestureLibraries.fromRawResource(this, R.raw.gestures);libraries.load();GestureOverlayView overlayView = (GestureOverlayView)findViewById(R.id.gesture);overlayView.addOnGesturePerformedListener(new GesturePerformedListener());}private class GesturePerformedListener implements OnGesturePerformedListener{@Overridepublic void onGesturePerformed(GestureOverlayView overlay,Gesture gesture) {ArrayList<Prediction> predictions = libraries.recognize(gesture);if(!predictions.isEmpty()){Prediction prediction = predictions.get(0);if(prediction.score >= 6){if("close".equals(prediction.name)){finish();}else if("fuchangle".equals(prediction.name)){Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:15001386673"));startActivity(intent);}}else {Toast.makeText(MainActivity.this, R.string.low, Toast.LENGTH_LONG).show();}}else {Toast.makeText(MainActivity.this, R.string.nofind, Toast.LENGTH_LONG).show();}}}@Overrideprotected void onDestroy() {super.onDestroy();android.os.Process.killProcess(android.os.Process.myPid());}}

注意添加打电话权限<uses-permission android:name="android.permission.CALL_PHONE"/>
工程代码见附件

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