自由手記

package com.example.android.apis.app;

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;

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);

        setContentView(R.layout.voice_recognition);

        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");
		}
    }


    public void onClick(View v)
	{
		if (v.getId() == R.id.btn_speak)
		{
			startVoiceRecognitionActivity();
		}
	}

    private void startVoiceRecognitionActivity()
	{
    	 //通過Intent傳遞語音辨識的模式
		Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
		//語言模式和自由形式的語音辨識
		intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
		提示語音開始
		intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");
		 //開始執行我們的Intent、語音辨識
		startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
	}


    //當語音結束時的回呼函數
    @Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data)
	{
		if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK)
		{
			// 取得語音的字元
			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);
	}
}