我使用以下代码调用谷歌的语音识别器:

// This is a demonstration of Android's built in speech recognizer

package com.example.voiceinputbuiltintest;

import java.util.ArrayList;
import java.util.Locale;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.speech.RecognizerIntent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    private static final int VOICE_RECOGNITION = 1;
    Button speakButton ;
    TextView spokenWords; 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        speakButton = (Button) findViewById(R.id.button1);  
        spokenWords = (TextView)findViewById(R.id.textView1);
    }

    @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;
    }

    @Override
    protected void onActivityResult(int requestCode,
            int resultCode,
            Intent data) {
        if (requestCode == VOICE_RECOGNITION && resultCode == RESULT_OK) {
            ArrayList<String> results;
            results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            // TODO Do something with the recognized voice strings

            Toast.makeText(this, results.get(0), Toast.LENGTH_SHORT).show();
            spokenWords.setText(results.get(0));
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    public void btnSpeak(View view){
        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        // Specify free form input
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
        RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_PROMPT,"Please start speaking");
        intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 1);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.ENGLISH);
        startActivityForResult(intent, VOICE_RECOGNITION);
    }


}  

这在我的测试机器(Nexus 7 和 Android 4.3)中没有网络连接时也能正常工作。我认为它在任何 Android 设备上都可以正常工作。然而，当我在 Samsung Galaxy S2 上试用 Android 版本 gingerbread.el21 时，语音识别器 Activity 出现，但表示它需要网络连接并且拒绝工作。为什么它适用于 Nexus 7 而不适用于 Galaxy S2？它是离线工作还是需要网络连接？即使我停止 wifi，它也能在 Nexus 7 中运行。

最佳答案

在jellybean中用户需要下载离线语音识别包。

This文章说:

Previously, when you pressed the voice icon and spoke a command or query, Android had to digitize your voice, upload it to the cloud, process the waveform, turn it into text, and send the text back down to your phone. Now the phones are powerful enough that this can be built into the device, with no extra network I/O needed. As you can imagine this results in much faster voice recognition than previous versions.

应用程序用户必须执行 this :

1. 转到设置中的“语言和输入法”
2. 点击“语音”下的“下载离线语音识别” 搜索”
3. 选择您希望 Android 设备识别的语言包
4. 下载包并享受离线语音输入

另一个 helper link :

Google have restricted certain Jelly Bean devices from using the offline recognition due to hardware constraints.

关于android - Android 上的 Google 语音识别器是否需要互联网？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19564561/