Android 手势识别的实现方法

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:

package cn.csdn.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.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();

}

}

效果图：（必须画的比较精确）



如果画c形状的话，会退出这个程序



如果画一个对钩的话，会去进行拨号的操作