android - Activity 已泄漏 ServiceConnection android.speech.SpeechRecognizer$Connection

Question

我正在尝试在 google glass 中创建一个功能，让我无需说出热词“ok glass”即可在卡片之间导航。

我尝试创建一个 SpeechRecognizer，它会不断地听取是否有人在说什么，如果提到了正确的“命令”，应用程序就会相应地采取行动。

但是 onError 方法告诉我

Error occured: RecognitionService busy.

它会抛出一个错误

Activity com.example.sw_stage.topfinder.MainActivity has leaked ServiceConnection android.speech.SpeechRecognizer$Connection@41d79530 that was originally bound here
android.app.ServiceConnectionLeaked: Activity com.example.sw_stage.topfinder.MainActivity has leaked ServiceConnection android.speech.SpeechRecognizer$Connection@41d79530 that was originally bound here
        at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:970)
        at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:864)
        at android.app.ContextImpl.bindServiceCommon(ContextImpl.java:1575)
        at android.app.ContextImpl.bindService(ContextImpl.java:1558)
        at android.content.ContextWrapper.bindService(ContextWrapper.java:517)
        at android.speech.SpeechRecognizer.startListening(SpeechRecognizer.java:287)
        at com.example.sw_stage.topfinder.SpeechDetector.<init>(SpeechDetector.java:35)
        at com.example.sw_stage.topfinder.MainActivity.onCreate(MainActivity.java:58)
        at android.app.Activity.performCreate(Activity.java:5235)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1089)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2188)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2273)
        at android.app.ActivityThread.access$800(ActivityThread.java:138)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1236)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:149)
        at android.app.ActivityThread.main(ActivityThread.java:5045)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
        at dalvik.system.NativeStart.main(Native Method)

我目前正在使用这个项目来测试我希望在最终应用程序中拥有的一些功能。目前我正在使用

• 头部手势导航
• 现场卡片和沉浸式体验相结合
• 使用 shell 命令的类，以便 simulate touch gestures

这是我为 SpeechRecognizer 编写的类

package com.example.sw_stage.topfinder;

import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.os.Bundle;
import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.util.Log;

import java.util.ArrayList;


public class SpeechDetector {
AudioManager mAudioManager;
SpeechRecognizer mSpeechRecognizer;
Intent intent;
issueKey mIssueKey = new issueKey();

public SpeechDetector(Context context)
{
    Log.i("speechdetector", "calling speech detector");
    mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

    mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(context);
    mSpeechRecognizer.setRecognitionListener(new listener(context));

    intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
    Log.i("package name", context.getPackageName());
    intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, context.getPackageName());
    mSpeechRecognizer.startListening(intent);
    Log.i("111111","11111111"+"in");
}

class listener implements RecognitionListener
{
    Context context1;
    public listener(Context context)
    {
        context1 = context;
    }

    @Override
    public void onReadyForSpeech(Bundle bundle) {

    }

    @Override
    public void onBeginningOfSpeech() {

    }

    @Override
    public void onRmsChanged(float v) {

    }

    @Override
    public void onBufferReceived(byte[] bytes) {

    }

    @Override
    public void onEndOfSpeech() {
        mSpeechRecognizer.startListening(intent);
    }

    @Override
    public void onError(int i) {
        //3 Audio recording error.
        //5 Other client side errors.
        //6 - No speech input
        //7 -No recognition result matched.
        //8 RecognitionService busy.
        //9 - vInsufficient permissions


        if(i == 1 || i == 2 || i == 3 || i == 4 || i == 5 || i == 6 || i == 7 || i == 8 || i == 9)
        {
            Log.wtf("Error occured", "Error " + i);
            mSpeechRecognizer.startListening(intent);
        }
    }

    @Override
    public void onResults(Bundle bundle) {
        ArrayList data = bundle.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
        String result = "enter";
        String reslt = "";
        for (int i = 0; i < data.size(); i++)
        {
            reslt = reslt + " " + data.get(i);
        }
        switch(result)
        {
            case "next":  mIssueKey.issueKey(22);
                break;
            case "previous": mIssueKey.issueKey(21);
                break;
            case "enter": mIssueKey.issueKey(23);
                break;
            case "leave": mIssueKey.issueKey(4);
        }

    }

    @Override
    public void onPartialResults(Bundle bundle) {

    }

    @Override
    public void onEvent(int i, Bundle bundle) {

    }
}

我在我的 MainActivity onCreate() 方法中调用这个类。

private SpeechDetector mSpeechDetector;

@Override
protected void onCreate(Bundle bundle) {
    super.onCreate(bundle);

    mIssueKey = new issueKey();
    mSpeechDetector = new SpeechDetector(getApplicationContext());

我变了

new SpeechDetector(MainActivity.this);

到

new SpeechDetector(getApplicationContext());

而且我不再得到泄漏的错误

然而

显然，泄露的错误与 RecognitionService 忙碌无关。所以我仍然坚持我的 speechrecognition 不起作用的事实，因为它抛出 RecognitionService busy 错误

编辑我刚刚注意到它写了一个额外的日志

    03-03 13:11:13.252  20018-20018/? A/Error occured﹕ RecognitionService busy
    03-03 13:11:13.260      825-825/? I/RecognitionService﹕ concurrent startListening received - ignoring this call

Answer 1

看起来 RecognitionService 在您调用 startListening() 时已经在使用中。我相信这是因为您已经在构造函数中调用了 startListening()，然后在 onEndOfSpeech() 中再次调用了它。

确保在再次调用 startListening() 之前进行必要的 cancel() 调用。