Android speech recognition

Android mainly through recognizerintent to achieve speech recognition, in fact, the code is relatively simple, but if you cannot find the settings, will throw an exception activitynotfoundexceptioN, so we need to catch this exception. and speech recognition is not tested on the simulator, because speech recognition is to access Google Cloud data, so if the phone's network is not turned on, you can not realize the recognition of sound! Be sure to turn on the phone's network, if the phone does not have speech recognition function, it is also unable to enable recognition!
Some constants of the recognizerintent:

We only need to pass an action and some properties through intent, and then start the voice with Startactivityforresult , the code is as follows:

Intent Intent = new Intent (Recognizerintent.action_recognize_speech); Intent.putextra (Recognizerintent.extra_language_model,recognizerintent.language_model_free_form); Intent.putextra (Recognizerintent.extra_prompt, "start voice, please speak .... "); Startactivityforresult (Intent, Voice_recognition_request_code);

First, no diagram is not programmed

below we go into Android speech recognition programming

1 . Create a simple layout activity_main.xml

<span style= "color: #000000;" ><?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/ Res/android "    android:layout_width=" match_parent "    android:layout_height=" match_parent "    android:o rientation= "Horizontal" >    <edittext        android:id= "@+id/edittext"        android:layout_width= "0DP"        android:layout_height= "wrap_content"        android:layout_weight= "3"        android:hint= "Enter search keywords"/>    <button         android:id= "@+id/btn_speech"         android:layout_width= "0DP"        android:layout_height= "Wrap_ Content "        android:text=" speech recognition "        android:layout_weight=" 1 "/>   </LinearLayout></span>

2, create an activity Mainactivity.java

Package Com.example.speechdetectortest;import Java.util.arraylist;import Android.app.activity;import Android.content.activitynotfoundexception;import Android.content.intent;import Android.net.Uri;import Android.os.bundle;import Android.speech.recognitionlistener;import Android.speech.recognizerintent;import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.button;import Android.widget.edittext;import Android.widget.toast;public class Mainactivity extends Activity implements Onclicklistener{private Button mbtnspeech;private EditText medittex;private int voice_recognition_request_code = 10000 ; @Overrideprotected void OnCreate (Bundle savedinstancestate) {//TODO auto-generated method Stubsuper.oncreate ( Savedinstancestate); Setcontentview (r.layout.activity_main); Mbtnspeech = (Button) Findviewbyid (R.id.btn_speech); Medittex = (EditText) Findviewbyid (R.id.edittext); Mbtnspeech.setonclicklistener (this);} @Overridepublic void OnClick (View v) {//TODO auto-generateD Method Stubswitch (V.getid ()) {case R.id.btn_speech:try {////The mode of passing speech recognition through Intent, turn on voice Intent Intent = new Intent (Recogniz Erintent.action_recognize_speech)///language mode and free form of speech recognition Intent.putextra (Recognizerintent.extra_language_model,  Recognizerintent.language_model_free_form); Prompt for voice start Intent.putextra (Recognizerintent.extra_prompt, "Start speech, please speak .....    "); Start speech recognition Startactivityforresult (intent, voice_recognition_request_code);} catch (Activitynotfoundexception e) {///Todo:handle exception//Cannot find a voice device device Toast.maketext (this, "cannot find a voice device device", Toast.len       Gth_long). Show (); StartActivity (New Intent ("Android.intent.action.VIEW", Uri.parse ("Market://search?q=pname: Com.google.android.voicesearch ")));} Break;default:break;}} When the voice ends the callback function Onactivityresult @Overrideprotected void onactivityresult (int requestcode, int resultcode, Intent data) {/  /TODO auto-generated method stubif (Requestcode = = Voice_recognition_request_code && ResultCode = = RESULT_OK) {// Get the voice character arraylist<string> Results = Data.getstringarraylistextra (recognizerintent.extra_results); if (RESULTS! = null) {//Set view update string strText = Results.get (0); Medittex.settext (StrText);}} Super.onactivityresult (Requestcode, ResultCode, data);}}

3, finally do not forget to add <uses-permission android:name= "Android.permission.INTERNET"/> permissions, because the need to connect to the network for speech recognition

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Android speech recognition