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我收到 threadid=1 的错误...我并不总是得到它，但我有时会在应用程序中的某个时间点得到它。不确定我的具体错误是什么。我检查了第 164 行，但没有看到任何会导致结果的东西。也许我需要在清单中添加一些东西？这是我的 LogCat。

05-08 17:19:28.796: W/dalvikvm(8683): threadid=1: thread exiting with uncaught exception (group=0x40e37438)
05-08 17:19:28.806: E/AndroidRuntime(8683): FATAL EXCEPTION: main
05-08 17:19:28.806: E/AndroidRuntime(8683): java.lang.NullPointerException
05-08 17:19:28.806: E/AndroidRuntime(8683):     at com.example.speech.MainActivity$SpeechListener.onResults(MainActivity.java:164)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at android.speech.SpeechRecognizer$InternalListener$1.handleMessage(SpeechRecognizer.java:442)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at android.os.Looper.loop(Looper.java:137)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at android.app.ActivityThread.main(ActivityThread.java:4918)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at java.lang.reflect.Method.invokeNative(Native Method)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at java.lang.reflect.Method.invoke(Method.java:511)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
05-08 17:19:28.806: E/AndroidRuntime(8683):     at dalvik.system.NativeStart.main(Native Method)

这是我的主要活动代码：package com.example.speech；

import java.util.ArrayList;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Build;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.app.Activity;
import android.content.Intent;
import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.view.Menu;
import android.view.View.OnClickListener;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.util.Log;

public class MainActivity extends Activity implements  OnClickListener {

private SpeechRecognizer mSpeechRecognizer;
private Intent mSpeechRecognizerIntent; 
boolean reseter = false;
private AudioManager mAudioManager;
private volatile boolean mNoSpeechCountDownOn;
MediaPlayer testSound;


@Override
protected void onCreate(Bundle savedInstanceState) {


    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    boolean available = SpeechRecognizer.isRecognitionAvailable(this);
    Log.d("Speech", "available = " + available);
    testSound = MediaPlayer.create(MainActivity.this, R.raw.soundclip);
    mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
    mSpeechRecognizer.setRecognitionListener(new SpeechListener());
    mSpeechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
            RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
    mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,
            this.getPackageName());
    mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_SPEECH_INPUT_COMPLETE_SILENCE_LENGTH_MILLIS, 0);
    mAudioManager = (AudioManager) getSystemService(this.AUDIO_SERVICE);
    mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
    mAudioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
    Log.d("speech", "Mute on");
    try {
        Thread.sleep(4000);
        Log.d("speech", "repeat");
        mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
        mAudioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
        Log.d("speech", "Mute on");
    } catch (InterruptedException e) {
    }


}

private CountDownTimer mNoSpeechCountDown = new CountDownTimer(5000, 5000)
{   
    @Override
    public void onTick(long millisUntilFinished)
    {

    }

    @SuppressWarnings("synthetic-access")
    @Override
    public void onFinish()
    {
        mNoSpeechCountDownOn = false;
        mSpeechRecognizer.cancel();
        mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
    }
};

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}


private class SpeechListener implements RecognitionListener {


    @Override
    public void onBeginningOfSpeech() {

        if (mNoSpeechCountDownOn)
        {
            mNoSpeechCountDownOn = false;
            mNoSpeechCountDown.cancel();
        }
        Log.d("Speech", "onBeginningOfSpeech");

    }

    @Override
    public void onBufferReceived(byte[] buffer) {
        Log.d("Speech", "onBufferReceived");
    }

    @Override
    public void onEndOfSpeech() {
        Log.d("Speech", "onEndOfSpeech");


    }

    @Override
    public void onError(int error) {

        if (mNoSpeechCountDownOn)
        {
            mNoSpeechCountDownOn = false;
            mNoSpeechCountDown.cancel();
        }
        Log.d("Speech", "onError");
    }

    @Override
    public void onEvent(int eventType, Bundle params) {
        Log.d("Speech", "onEvent");
    }

    @Override
    public void onPartialResults(Bundle partialResults) {
        Log.d("Speech", "onPartialResults");
    }

    @Override
    public void onReadyForSpeech(Bundle params) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
        {
            mNoSpeechCountDownOn = true;
            mNoSpeechCountDown.start();
            mAudioManager.setStreamMute(AudioManager.STREAM_SYSTEM, false);
        }
        Log.d("Speech", "onReadyForSpeech");
        try {
            Thread.sleep(6000);
            Log.d("speech", "repeat");
            mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
            mAudioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
            Log.d("speech", "Mute on");
        } catch (InterruptedException e) {
        }}
    @Override
    public void onResults(Bundle results) {
        Log.d("Speech", "results");



        ArrayList<String> matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
        for (String match : matches) { if (match.equals("one"))  testSound.start();
                else if (match.equals("two")) testSound.start();
        }
        // Do whatever you want here
        try {
            Thread.sleep(1);
            Log.d("speech", "repeat");
            mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
            mAudioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
            Log.d("speech", "Mute on");
        } catch (InterruptedException e) {
        }
    }
    @Override
    public void onRmsChanged(float rmsdB) {
        //Log.d("Speech", "onRmsChanged");
    }

}


@Override
public void onClick(View arg0) {
    //must keep the onClick

}
}
4

2 回答 2

1 
05-08 17:19:28.806: E/AndroidRuntime(8683): java.lang.NullPointerException
05-08 17:19:28.806: E/AndroidRuntime(8683):     at com.example.speech.MainActivity$SpeechListener.onResults(MainActivity.java:164)

猜测第 164 行是

else if (match.equals("two")) testSound.start();

我怀疑你有时match会null。如果是这样，match.equals...代码将由于非常明显的原因而崩溃。最简单的解决方案是更改此行，从：

else if (match.equals("two")) testSound.start();

更安全的形式：

else if ("two".equals(match)) testSound.start();
于 2013-05-09T00:37:37.453 回答
0 
ArrayList<String> matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
if(matches!=null) {
    for (String match : matches)
    /* ... */
}

如果没有匹配项，matches 可能为 null。

于 2013-05-09T00:54:16.957 回答