Android 自带语音识别功能

在Android 1.5 SDK中已经加强了语音识别功能,第三方通过Intent就可以简单的使用这个功能!下面做简要说明!

先看页面布局:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" android:padding="5dip">

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="语音识别" />

    <ListView
        android:id="@+id/listView1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:background="#00000000">
    </ListView>

</LinearLayout>

说明:LinearLayout里面垂直放置了Button和ListView,通过Button的点击事件触发语音识别,然后把结果设置到ListView中。

Activity中的代码如下:

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class RecognizerActivity extends Activity implements OnClickListener, OnItemClickListener {
    
	private static final int VOICE_RECOGNITION_REQUEST_CODE = 131422;
	
	private ListView mListView;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mListView = (ListView) findViewById(R.id.listView1);
        mListView.setOnItemClickListener(this);
        
        ((Button) findViewById(R.id.button1)).setOnClickListener(this);
        
    }

	@Override
	public void onClick(View v) {
		
		mListView.setAdapter(null);
		
		try {
			
			Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
			intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
			intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "开始语音识别");
			startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
			
		} catch (Exception e) {
			e.printStackTrace();
			Toast.makeText(this, "不能语音识别", Toast.LENGTH_SHORT).show();
		}
	}
	
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		
		if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && data != null) {
			ArrayList<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
			if (results != null) {
				mListView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, results));
				Toast.makeText(this, results.toString(), Toast.LENGTH_SHORT).show();
				super.onActivityResult(requestCode, resultCode, data);
			}
		}
		
	}

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position,
			long id) {
		Toast.makeText(this, parent.getAdapter().getItem(position).toString(), Toast.LENGTH_SHORT).show();
	}
	
}

说明:

  • onCreate:获得相关View的引用,并设置对应的事件处理;
  • onClick:清空ListView数据,并启动语音识别,如果系统没有Activity处理请求的Intent,以Toast形式提示;
  • onActivityResult:获得语音识别后的结果并做相关处理;
  • onItemClick:ListView中数据项点击事件处理------显示;

运行效果如图:



 

 

 

 

 

多说一句:当然还有其它方法实现语音识别,但此方法比较简单!:)

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转载自wangleyiang.iteye.com/blog/1769257