如何在应用程序后台运行RecognitionListener？

// MyRecognitionService.java

import android.app.Service;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.widget.Toast;

public class MyRecognitionService extends Service implements RecognitionListener {

    private SpeechRecognizer speechRecognizer;

    @Override
    public void onCreate() {
        super.onCreate();
        speechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
        speechRecognizer.setRecognitionListener(this);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if (intent != null) {
            Bundle extras = intent.getExtras();
            if (extras != null) {
                // 处理传递给Service的额外数据
            }
        }
        startRecognition();
        return START_STICKY;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (speechRecognizer != null) {
            speechRecognizer.destroy();
        }
    }

    private void startRecognition() {
        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, getPackageName());
        speechRecognizer.startListening(intent);
    }

    @Override
    public void onReadyForSpeech(Bundle params) {
        // 当识别器准备好接收语音输入时调用
    }

    @Override
    public void onBeginningOfSpeech() {
        // 当开始说话时调用
    }

    @Override
    public void onEndOfSpeech() {
        // 当结束说话时调用
    }

    @Override
    public void onError(int error) {
        // 当发生错误时调用，例如识别失败
    }

    @Override
    public void onResults(Bundle results) {
        // 当识别结果可用时调用
        // 可以通过results参数获取识别的文本结果
    }

    @Override
    public void onPartialResults(Bundle partialResults) {
        // 当部分识别结果可用时调用
    }

    @Override
    public void onEvent(int eventType, Bundle params) {
        // 当识别器产生事件时调用
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

Intent intent = new Intent(context, MyRecognitionService.class);
startService(intent);