Android手势识别的实现

手势识别系统：

先把手势库放到项目中：（创建手势库见下一篇博客）

在res文件夹下新建一个名为raw的文件夹，然后把手势库放进去

然后开始项目的创建：

strings.xml:

    <?xml version="1.0" encoding="utf-8"?>        <resources>                    <string name="app_name">GestureTest</string>            <string name="notrecognize">没有手势</string>            <string name="noprediction">手势识别率太低，请重新输入</string>            <string name="noloading">手势库没有加载成功</string>                </resources>  

main.xml:

    <?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/myGesture"                android:layout_width="fill_parent"                android:layout_height="0dip"                android:layout_weight="1.0"                />                </LinearLayout>  

GestureTestActivity.java:

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.util.Log;    import android.widget.Toast;        public class GestureTestActivity extends Activity {            GestureOverlayView gestureView;        GestureLibrary gLibrary;        boolean loadState;            public void onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            setContentView(R.layout.main);                init();        }              private void init() {            gestureView = (GestureOverlayView) this.findViewById(R.id.myGesture);            gestureView                    .addOnGesturePerformedListener(new MyOnGesturePerformedListener());                // 创建首饰库对象GestureLibrary            gLibrary = GestureLibraries.fromRawResource(this, R.raw.gestures);            // 加载手势库资源            loadState = gLibrary.load();        }            private final class MyOnGesturePerformedListener implements                OnGesturePerformedListener {                public void onGesturePerformed(GestureOverlayView overlay,                    Gesture gesture) {                if (loadState) {//加载手势资源成功                    // 获取画的图形进行匹配，匹配程度就是Prediction中的score                    ArrayList<Prediction> predictions = gLibrary.recognize(gesture);                        if (!predictions.isEmpty()) {// 如果用户画了图形，就会匹配                            Prediction prediction = predictions.get(0);                        Log.i("TAG", String.valueOf(prediction.score));                        if (prediction.score > 5) {// 判断相似度大于1，与里面的两者进行匹配                            if ("close".equals(prediction.name)) {//关闭                                finish();                            } else if ("dialto".equals(prediction.name)) {//打电话                                Intent intent = new Intent(Intent.ACTION_CALL,                                        Uri.parse("tel:11111111111"));                                startActivity(intent);                            }                        } else {// 相似度小于1，不识别                            showToast(R.string.noprediction);                        }                    } else {//没有画图形                        showToast(R.string.notrecognize);                    }                } else {                    showToast(R.string.noloading);                }            }        }            private void showToast(int tesId) {            Toast.makeText(this, tesId, Toast.LENGTH_LONG).show();        }    }