Android Gusture 手势识别小案例

jopen 7年前

Step1: 生成一个Android Gusture Builder程序用于画Gusture然后存储起来用于其它的项目

 

首先导入  android SDK \android-sdk-windows\samples\android-8\   目录下的GestureBuilder项目,用于生成Gusture类库

导入过程中要加入几个文件才能导入到Eclipse中,如下图所示: 这几个文件可以从任意android项目中copy

.classpath    .project   default.properties 3个文件

 

导入之后生成项目如下图所示:                                                                                                              将该项目安装到模拟器中,如下图所示:

 Android Gusture 手势识别小案例                                                             Android Gusture 手势识别小案例

 

step2:应用此程序生成我们需要的手势,点击 Add gesture按钮添加手势,随便添加几个手势之后

  Android Gusture 手势识别小案例 然后会在sdcard中生成一个gusture文件  如图所示

 Android Gusture 手势识别小案例

 

 

step2:将此gusture文件导出到桌面,然后再复制到新建的项目中去

step3:新建项目Gusture,并将刚才的gusture文件导入到/res/raw目录下 ,如下图所示

 Android Gusture 手势识别小案例

 

step4:  设计应用的UI界面,main.xml

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:orientation="vertical" android:layout_width="fill_parent"   android:layout_height="fill_parent">     <android.gesture.GestureOverlayView    android:layout_width="fill_parent"    android:layout_height="0dp"    android:layout_weight="1"    android:id="@+id/gesture"     android:gestureStrokeType="multiple"/><!-- 多笔手势 -->   <!-- android:layout_weight="0"  值越低越先赋值      所以先对Button赋值再对android.gesture.GestureOverlayView赋值 -->   <Button android:layout_width="wrap_content"    android:layout_height="wrap_content"     android:layout_weight="0"    android:text="@string/recognize"    android:onClick="findGesture" />  </LinearLayout>


string.xml

<?xml version="1.0" encoding="utf-8"?>  <resources>      <string name="hello">Hello World, MainActivity!</string>      <string name="app_name">手势识别</string>      <string name="notfind">手势不匹配</string>      <string name="notfull">手势匹配度太低</string>      <string name="recognize">识别</string>  </resources>


 

step5:MainActivity.java

package cn.roco.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.util.Log;  import android.view.MotionEvent;  import android.view.View;  import android.widget.Toast;    public class MainActivity extends Activity {      private static final String TAG="MainActivity";      private GestureLibrary library;     private Gesture mygesture;      private GestureOverlayView gestureOverlayView ;      /** Called when the activity is first created. */   @Override   public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);      /** 根据放入到res/raw/目录下的gestures文件生成GestureLibrary手势库 */    library = GestureLibraries.fromRawResource(this, R.raw.gestures);    /**加载手势库*/    library.load();      gestureOverlayView = (GestureOverlayView) this      .findViewById(R.id.gesture);    /**只能监听单笔手势*/   /* gestureOverlayView      .addOnGesturePerformedListener(new MyGesturePerformedListener());*/        /**可以监听单笔手势也可以监听多笔手势*/    gestureOverlayView.addOnGestureListener(new MyGestureListener());   }   /**    * 处理按钮响应的方法    * 点击识别按钮 开始识别手势    */   public void findGesture(View view){    recognizeGesture(mygesture);    //清除画出的手势    gestureOverlayView.clear(true);   }      private final class MyGestureListener implements android.gesture.GestureOverlayView.OnGestureListener{    @Override    public void onGestureStarted(GestureOverlayView overlay,      MotionEvent event) {     Log.i(TAG, "onGestureStarted");    }      @Override    public void onGesture(GestureOverlayView overlay, MotionEvent event) {     Log.i(TAG, "onGesture");    }      @Override    public void onGestureEnded(GestureOverlayView overlay, MotionEvent event) {     Log.i(TAG, "onGestureEnded");          /**取得用户最后画完后的手势*/     mygesture=overlay.getGesture();    }      @Override    public void onGestureCancelled(GestureOverlayView overlay,      MotionEvent event) {     Log.i(TAG, "onGestureCancelled");    }       }        /**    * 用户绘制完手势后响应    */   private final class MyGesturePerformedListener implements     android.gesture.GestureOverlayView.OnGesturePerformedListener {    @Override    public void onGesturePerformed(GestureOverlayView overlay,      Gesture gesture) {     recognizeGesture(gesture);    }     }      /**识别手势*/   private void recognizeGesture(Gesture gesture) {    /**     * 从手势库中查询匹配的内容, 匹配结果可能包含多个相似的内容,     * 匹配度高的结果放在最前面 */    ArrayList<Prediction> predictions = library.recognize(gesture);    if (!predictions.isEmpty()) {     Prediction prediction=predictions.get(0);     if (prediction.score>=6) {   //匹配度大于等于60%      if ("ouyang".equals(prediction.name)) {       /**调用手机拨号程序*/       Intent intent=new Intent(Intent.ACTION_CALL,Uri.parse("tel:15245474568"));       startActivity(intent);      }else if("close".equals(prediction.name)){       finish();//关闭Activity   会引发onDestory方法      }     }else{      //手势匹配度太低      Toast.makeText(getApplicationContext(), R.string.notfull, 1)      .show();     }    } else {     //不匹配     Toast.makeText(getApplicationContext(), R.string.notfind, 1)       .show();    }   }      @Override   protected void onDestroy() {    super.onDestroy();    /**   杀掉本应用的进程     * 第一种方法:首先获取当前进程的id,如何杀死该进程      */    android.os.Process.killProcess(android.os.Process.myPid());//关闭应用    /**     * 关闭应用还有2种方法     *      * 第二种方法:终止当前正在运行的Java虚拟机,导致程序终止     *   System.exit(0);     *        *        * 第三种方法:强制关闭与该包有关联的一切执行     *    android.app.ActivityManager manager=(ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);         manager.restartPackage(getPackageName());     还要添加权限才行        <uses-permission android:name="android.permission.CALL_PHONE"/>     *        */       }     }


step6:AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>  <manifest xmlns:android="http://schemas.android.com/apk/res/android"        package="cn.roco.gesture"        android:versionCode="1"        android:versionName="1.0">      <uses-sdk android:minSdkVersion="8" />            <!-- 拨打电话的权限 -->      <uses-permission android:name="android.permission.CALL_PHONE"/>        <application android:icon="@drawable/icon" android:label="@string/app_name">          <activity android:name=".MainActivity"                    android:label="@string/app_name">              <intent-filter>                  <action android:name="android.intent.action.MAIN" />                  <category android:name="android.intent.category.LAUNCHER" />              </intent-filter>          </activity>        </application>  </manifest>


 

 step7:将项目部署到模拟器中,如果所示界面:

 Android Gusture 手势识别小案例              Android Gusture 手势识别小案例

然后画手势 点击“识别”按钮进行识别   上面的时候一点击  就退出了此应用

 


 

 Android Gusture 手势识别小案例                              Android Gusture 手势识别小案例  

 然后画手势 点击“识别”按钮进行识别 就激活了拨号程序进行拨号          

 

 Android Gusture 手势识别小案例                           Android Gusture 手势识别小案例

然后画手势 点击“识别”按钮进行识别 显示匹配度太低

 

 

 

 

附注:自己写一个添加手势的应用

AddGesture.java

package cn.roco.gesture;      import android.app.Activity;  import android.app.AlertDialog;  import android.content.DialogInterface;  import android.content.DialogInterface.OnClickListener;  import android.gesture.Gesture;  import android.gesture.GestureLibraries;  import android.gesture.GestureLibrary;  import android.gesture.GestureOverlayView;  import android.gesture.GestureOverlayView.OnGesturePerformedListener;  import android.graphics.Bitmap;  import android.graphics.Color;  import android.os.Bundle;  import android.view.View;  import android.widget.EditText;  import android.widget.ImageView;  import android.widget.Toast;  /**   * 添加手势   */  public class AddGesture extends Activity {   EditText editText;   GestureOverlayView gestureOverlayView;     @Override   protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.addgesture);    // 获取文本编辑器    editText = (EditText) findViewById(R.id.gesture_name);    // 获取手势编辑视图    gestureOverlayView = (GestureOverlayView) findViewById(R.id.gesture);    // 设置手势的绘制颜色    gestureOverlayView.setGestureColor(Color.RED);    // 设置手势的绘制宽度    gestureOverlayView.setGestureStrokeWidth(4);    // 为 gesture的手势完成事件绑定事件监听器    gestureOverlayView      .addOnGesturePerformedListener(new OnGesturePerformedListener() {       @Override       public void onGesturePerformed(GestureOverlayView overlay,         final Gesture gesture) {        // 加载save.xml界面布局代表的视图        View saveDialog = getLayoutInflater().inflate(          R.layout.save, null);        // 获取 saveDialog里的ImageView组件        ImageView imageView = (ImageView) saveDialog          .findViewById(R.id.show);        // 获取 saveDialog里的 EditText组件        final EditText gestureName = (EditText) saveDialog          .findViewById(R.id.gesture_name);        // 根据 Gesture包含的手势创建一个位图        Bitmap bitmap = gesture.toBitmap(128, 128, 10,          0xFFFF0000);        imageView.setImageBitmap(bitmap);        // 使用对话框显示saveDialog组件        new AlertDialog.Builder(AddGesture.this)          .setView(saveDialog)          .setPositiveButton("保存", new OnClickListener() {           @Override           public void onClick(DialogInterface dialog,             int which) {            // 获取指定的文件对应的手势库            GestureLibrary gestureLibrary = GestureLibraries              .fromFile("/sdcard/gestures");            // 添加手势            gestureLibrary.addGesture(gestureName              .getText().toString(), gesture);            // 保存手势库            gestureLibrary.save();            Toast.makeText(getApplicationContext(), "保存成功", 1).show();           }          })          .setNegativeButton("取消", null)          .show();       }      });   }  }

addgesture.xml

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:orientation="vertical" android:layout_width="fill_parent"   android:layout_height="fill_parent">   <TextView android:text="请在下面屏幕上绘制手势" android:layout_width="fill_parent"    android:layout_height="wrap_content" />   <!-- 使用手势绘制组件 -->   <android.gesture.GestureOverlayView    android:layout_width="fill_parent" android:layout_height="fill_parent"    android:layout_weight="1" android:id="@+id/gesture"    android:gestureStrokeType="multiple" /><!-- 多笔手势 -->  </LinearLayout>


save.xml

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:orientation="vertical" android:layout_width="fill_parent"   android:layout_height="fill_parent">   <LinearLayout android:orientation="horizontal"    android:layout_width="fill_parent" android:layout_height="wrap_content">    <TextView android:text="请输入保存的手势名称"     android:layout_marginRight="8dip" android:layout_width="wrap_content"     android:layout_height="wrap_content" />    <!-- 定义一个文本框来让用户输入手势名 -->    <EditText android:layout_width="fill_parent"     android:layout_height="wrap_content" android:id="@+id/gesture_name" />   </LinearLayout>   <ImageView android:id="@+id/show" android:layout_marginTop="10dp"    android:layout_width="128dp" android:layout_height="128dp " />  </LinearLayout>


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