Android中主要通过RecognizerIntent来实现语音识别,其实代码比较简单,但是如果找不到设置,就会抛出异常 ActivityNotFoundException,所以我们需要捕捉这个异常。而且语音识别在模拟器上是无法测试的,因为语音识别是访问google 云端数据,所以如果手机的网络没有开启,就无法实现识别声音的!一定要开启手机的网络,如果手机不存在语音识别功能的话,也是无法启用识别! 下面是RecognizerIntentActivity中的代码: 查看源码 01 | public class RecognizerIntentActivity extends Activity { | 03 | private Button btnReconizer; | 04 | private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234 ; | 06 | protected void onCreate(Bundle savedInstanceState) { | 07 | // TODO Auto-generated method stub | 08 | super .onCreate(savedInstanceState); | 09 | setContentView(R.layout.reconizer); | 11 | btnReconizer=(Button) this .findViewById(R.id.btnRecognizer); | 12 | btnReconizer.setOnClickListener( new OnClickListener() { | 15 | public void onClick(View v) { | 16 | // TODO Auto-generated method stub | 18 | //通过Intent传递语音识别的模式,开启语音 | 19 | Intent intent= new Intent (RecognizerIntent.ACTION_RECOGNIZE_SPEECH); | 21 | intent.putExtra( RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM ); | 23 | intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "开始语音" ); | 25 | startActivityForResult( intent, VOICE_RECOGNITION_REQUEST_CODE ); | 26 | } catch (Exception e) { | 27 | // TODO: handle exception | 29 | Toast.makeText( getApplicationContext(), "找不到语音设备" , 1 ).show(); | 37 | protected void onActivityResult( int requestCode, int resultCode, Intent data) { | 38 | // TODO Auto-generated method stub | 40 | if (requestCode==VOICE_RECOGNITION_REQUEST_CODE && resultCode==RESULT_OK){ | 42 | ArrayList results=data.getStringArrayListExtra (RecognizerIntent.EXTRA_RESULTS); | 44 | String resultString= "" ; | 46 | resultString+=results.get(i); | 48 | Toast.makeText( this , resultString, 1 ).show(); | 50 | super .onActivityResult(requestCode, resultCode, data); | 其主要原理就是将语音发送到google云端,然后云端处理,匹配相应的数据,发送到客户端。 最后不要忘记,在manifest中加入网络访问权限: 运行后效果: 点击开始语音按钮,然后开始说话(这里要保证手机的网路是打开的): |