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我正在使用 API 示例中已经提供的代码使用语音识别 API，我在同一个活动示例中想要的功能是：

A）即使我的手机没有使用，也就是屏幕锁定时，它也能正常工作。B）如果 googleAPI 没有找到这个词，它会显示一个对话框，说取消/再次说话，然后代码会自行选择再次说话，如何进行。

这是代码：

package com.wwwww.and;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.List;

/**
 * Sample code that invokes the speech recognition intent API.
 */
public class VoiceRecognition extends Activity implements OnClickListener {

    private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;

    private ListView mList;

    /**
     * Called with the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Inflate our UI from its XML layout description.
        setContentView(R.layout.voice_recognition);

        // Get display items for later interaction
        Button speakButton = (Button) findViewById(R.id.btn_speak);

        mList = (ListView) findViewById(R.id.list);

        // Check to see if a recognition activity is present
        PackageManager pm = getPackageManager();
        List<ResolveInfo> activities = pm.queryIntentActivities(
                new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
        if (activities.size() != 0) {
            speakButton.setOnClickListener(this);
        } else {
            speakButton.setEnabled(false);
            speakButton.setText("Recognizer not present");
        }
        startVoiceRecognitionActivity();
    }

    /**
     * Handle the click on the start recognition button.
     */
    public void onClick(View v) {
        if (v.getId() == R.id.btn_speak) {
            //startVoiceRecognitionActivity();
        }
    }

    /**
     * Fire an intent to start the speech recognition activity.
     */
    private void startVoiceRecognitionActivity() {
        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_PROMPT, " VoiceRecognition Service");
        startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
    }

    /**
     * Handle the results from the recognition activity.
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
            // Fill the list view with the strings the recognizer thought it could have heard
            ArrayList<String> matches = data.getStringArrayListExtra(
                    RecognizerIntent.EXTRA_RESULTS);
            mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
                    matches));
        }

        super.onActivityResult(requestCode, resultCode, data);
    }
}
4

1 回答 1

1 
A) that it works even when my phone is not used that is when the screen is locked.

您需要在服务中实现语音识别。 

B) If the googleAPI doesn't find the word it shows a dialog saying cancel/speak again then code selects speak again by itself ,how to go about.

将您的更改onActivityResult为下面的 

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) 
{
    if (requestCode == VOICE_RECOGNITION_REQUEST_CODE) 
    {
      if (resultCode == RESULT_OK)
      {
        // Fill the list view with the strings the recognizer thought it could have heard
        ArrayList<String> matches;
        if (data != null)
        {
              matches = data.getStringArrayListExtra(
                RecognizerIntent.EXTRA_RESULTS);
        }

        if (data == null || matches.size() == 0)
        {
             startVoiceRecognitionActivity();
        }
        else
        {
             mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
                matches));
        }
     }
     else
     {
         startVoiceRecognitionActivity();
     }
   }

    super.onActivityResult(requestCode, resultCode, data);
}
于 2013-03-22T06:04:46.407 回答