Android使用百度语音识别的示例代码
本文使用百度语音识别，完成语音识别的功能，使用百度语音识别，先要申请APPID，这个直接到百度网站上有说明文档，本文不再赘述。申请之后，下载SDK包，按照百度官网要求，合并libs和res两个目录到项目中，然后在build.gradle(module:app)中的Android{...}下添加
sourceSets{
main{
jniLibs.srcDirs=['libs']
}
}
这样，百度语音识别的so文件才能正常使用。
Manifest文件中添加权限
<uses-permissionandroid:name="android.permission.RECORD_AUDIO"/> <uses-permissionandroid:name="android.permission.INTERNET"/> <uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permissionandroid:name="android.permission.ACCESS_WIFI_STATE"/> <uses-permissionandroid:name="android.permission.CHANGE_WIFI_STATE"/> <uses-permissionandroid:name="android.permission.READ_PHONE_STATE"/> <uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
然后还要在Manifest中添加
<!--请填写应用实际的APP_ID--> <meta-dataandroid:name="com.baidu.speech.APP_ID"android:value="APPID"/> <!--请填写应用实际的API_KEY--> <meta-dataandroid:name="com.baidu.speech.API_KEY"android:value="API_KEY"/> <!--请填写应用实际的SECRET_KEY--> <meta-dataandroid:name="com.baidu.speech.SECRET_KEY"android:value="SECRET_KEY"/> <serviceandroid:name="com.baidu.speech.VoiceRecognitionService"android:exported="false"/>
其中的APPID，API_KEY和SECRET_KEY替换为你申请的内容。
我们封装了一个工具类，用来使用语音识别
packagecom.yjp.speechrecognizer;
importandroid.content.ComponentName;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.os.Bundle;
importandroid.speech.RecognitionListener;
importandroid.speech.SpeechRecognizer;
importandroid.widget.Toast;
importcom.baidu.speech.VoiceRecognitionService;
publicclassSpeechRecognizerToolimplementsRecognitionListener{
publicinterfaceResultsCallback{
voidonResults(Stringresult);
}
privateContextmContext;
privateSpeechRecognizermSpeechRecognizer;
privateResultsCallbackmResultsCallback;
publicSpeechRecognizerTool(Contextcontext){
mContext=context;
}
publicsynchronizedvoidcreateTool(){
if(null==mSpeechRecognizer){
//创建识别器
mSpeechRecognizer=SpeechRecognizer.createSpeechRecognizer(mContext,
newComponentName(mContext,VoiceRecognitionService.class));
//注册监听器
mSpeechRecognizer.setRecognitionListener(this);
}
}
publicsynchronizedvoiddestroyTool(){
mSpeechRecognizer.stopListening();
mSpeechRecognizer.destroy();
mSpeechRecognizer=null;
}
//开始识别
publicvoidstartASR(ResultsCallbackcallback){
mResultsCallback=callback;
Intentintent=newIntent();
bindParams(intent);
mSpeechRecognizer.startListening(intent);
}
//停止识别
publicvoidstopASR(){
mSpeechRecognizer.stopListening();
}
privatevoidbindParams(Intentintent){
//设置识别参数
}
@Override
publicvoidonReadyForSpeech(Bundleparams){
//准备就绪
Toast.makeText(mContext,"请开始说话",Toast.LENGTH_SHORT).show();
}
@Override
publicvoidonBeginningOfSpeech(){
//开始说话处理
}
@Override
publicvoidonRmsChanged(floatrmsdB){
//音量变化处理
}
@Override
publicvoidonBufferReceived(byte[]buffer){
//录音数据传出处理
}
@Override
publicvoidonEndOfSpeech(){
//说话结束处理
}
@Override
publicvoidonError(interror){
}
@Override
publicvoidonResults(Bundleresults){
//最终结果处理
if(mResultsCallback!=null){
Stringtext=results.get(SpeechRecognizer.RESULTS_RECOGNITION)
.toString().replace("]","").replace("[","");
mResultsCallback.onResults(text);
}
}
@Override
publicvoidonPartialResults(BundlepartialResults){
//临时结果处理
}
@Override
publicvoidonEvent(inteventType,Bundleparams){
}
}
MainActivity的界面如下
<?xmlversion="1.0"encoding="utf-8"?> <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:orientation="vertical" android:gravity="center" tools:context="com.yjp.speechrecognizer.MainActivity"> <Button android:id="@+id/startSpeechButton" android:layout_width="60dp" android:layout_height="40dp" android:background="@drawable/bdspeech_btn_orangelight_normal" android:text="按住说话"/> <TextView android:id="@+id/speechTextView" android:layout_margin="10dp" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout>
MainActivity的类实现为：
packagecom.yjp.speechrecognizer;
importandroid.os.Bundle;
importandroid.support.v7.app.AppCompatActivity;
importandroid.view.MotionEvent;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.TextView;
publicclassMainActivityextendsAppCompatActivityimplementsSpeechRecognizerTool.ResultsCallback{
privateButtonmStartSpeechButton;
privateTextViewmTextView;
privateSpeechRecognizerToolmSpeechRecognizerTool=newSpeechRecognizerTool(this);
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView=(TextView)findViewById(R.id.speechTextView);
mStartSpeechButton=(Button)findViewById(R.id.startSpeechButton);
mStartSpeechButton.setOnTouchListener(newView.OnTouchListener(){
@Override
publicbooleanonTouch(Viewv,MotionEventevent){
intaction=event.getAction();
switch(action){
caseMotionEvent.ACTION_DOWN:
mSpeechRecognizerTool.startASR(MainActivity.this);
mStartSpeechButton.setBackgroundResource(
R.drawable.bdspeech_btn_orangelight_pressed);
break;
caseMotionEvent.ACTION_UP:
mSpeechRecognizerTool.stopASR();
mStartSpeechButton.setBackgroundResource(
R.drawable.bdspeech_btn_orangelight_normal);
break;
default:
returnfalse;
}
returntrue;
}
});
}
@Override
protectedvoidonStart(){
super.onStart();
mSpeechRecognizerTool.createTool();
}
@Override
protectedvoidonStop(){
super.onStop();
mSpeechRecognizerTool.destroyTool();
}
@Override
publicvoidonResults(Stringresult){
finalStringfinalResult=result;
MainActivity.this.runOnUiThread(newRunnable(){
@Override
publicvoidrun(){
mTextView.setText(finalResult);
}
});
}
}
可以运行看一下效果，感觉识别率还是不错的。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。