android 语音识别

首先可以用以下代码测试你的机器是不是有语音识别功能：

        PackageManager pm = getPackageManager();        List activities = pm.queryIntentActivities(                new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);        if (activities.size() != 0) {            /*Activity  存在*/        Toast.makeText(AndroidVoiceActivity.this, "Activity  存在", Toast.LENGTH_LONG).show();        } else {            /*  Activity  Not  Found   未判断会抛出ActivityNotFoundException*/        Toast.makeText(AndroidVoiceActivity.this, "Activity  不存在", Toast.LENGTH_LONG).show();        }

简单的Activity：

package com.relin.voice;import java.util.ArrayList;import java.util.List;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.Button;import android.widget.Toast;public class AndroidVoiceActivity extends Activity {    /** Called when the activity is first created. */private static final int VOICE_RECOGNITION_REQUEST_CODE = 1;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                Button button = (Button)findViewById(R.id.button1);        button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubtry{Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "开始语音");startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);}catch (Exception e) {// TODO: handle exceptionToast.makeText(AndroidVoiceActivity.this, "ActivityNotFoundException", Toast.LENGTH_LONG).show();}}});    }@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubif (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {ArrayList result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);String resultString = "";for (int i = 0; i < result.size(); i++) {resultString += result.get(i);}Toast.makeText(this, resultString, Toast.LENGTH_LONG).show();}super.onActivityResult(requestCode, resultCode, data);}        }

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