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這篇文章將為大家詳細講解有關怎么Android項目中使用百度語音識別,文章內容質量較高,因此小編分享給大家做個參考,希望大家閱讀完這篇文章后對相關知識有一定的了解。
使用百度語音識別,先要申請APP ID,這個直接到百度網站上有說明文檔,本文不再贅述。申請之后,下載SDK包,按照百度官網要求,合并libs和res兩個目錄到項目中,然后在build.gradle(module:app)中的Android{...}下添加
sourceSets{ main{ jniLibs.srcDirs=['libs'] } }
這樣, 百度語音識別的so文件才能正常使用。
Manifest文件中添加權限
<uses-permission android:name="android.permission.RECORD_AUDIO" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
然后還要在Manifest中添加
<!-- 請填寫應用實際的APP_ID --> <meta-data android:name="com.baidu.speech.APP_ID" android:value="APP ID"/> <!-- 請填寫應用實際的API_KEY --> <meta-data android:name="com.baidu.speech.API_KEY" android:value="API_KEY"/> <!-- 請填寫應用實際的SECRET_KEY --> <meta-data android:name="com.baidu.speech.SECRET_KEY" android:value="SECRET_KEY"/> <service android:name="com.baidu.speech.VoiceRecognitionService" android:exported="false" />
其中的APP ID,API_KEY和SECRET_KEY替換為你申請的內容。
我們封裝了一個工具類,用來使用語音識別
package com.yjp.speechrecognizer; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.speech.RecognitionListener; import android.speech.SpeechRecognizer; import android.widget.Toast; import com.baidu.speech.VoiceRecognitionService; public class SpeechRecognizerTool implements RecognitionListener { public interface ResultsCallback { void onResults(String result); } private Context mContext; private SpeechRecognizer mSpeechRecognizer; private ResultsCallback mResultsCallback; public SpeechRecognizerTool(Context context) { mContext = context; } public synchronized void createTool() { if (null == mSpeechRecognizer) { // 創建識別器 mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(mContext, new ComponentName(mContext, VoiceRecognitionService.class)); // 注冊監聽器 mSpeechRecognizer.setRecognitionListener(this); } } public synchronized void destroyTool() { mSpeechRecognizer.stopListening(); mSpeechRecognizer.destroy(); mSpeechRecognizer = null; } // 開始識別 public void startASR(ResultsCallback callback) { mResultsCallback = callback; Intent intent = new Intent(); bindParams(intent); mSpeechRecognizer.startListening(intent); } //停止識別 public void stopASR() { mSpeechRecognizer.stopListening(); } private void bindParams(Intent intent) { // 設置識別參數 } @Override public void onReadyForSpeech(Bundle params) { // 準備就緒 Toast.makeText(mContext, "請開始說話", Toast.LENGTH_SHORT).show(); } @Override public void onBeginningOfSpeech() { // 開始說話處理 } @Override public void onRmsChanged(float rmsdB) { // 音量變化處理 } @Override public void onBufferReceived(byte[] buffer) { // 錄音數據傳出處理 } @Override public void onEndOfSpeech() { // 說話結束處理 } @Override public void onError(int error) { } @Override public void onResults(Bundle results) { // 最終結果處理 if (mResultsCallback != null) { String text = results.get(SpeechRecognizer.RESULTS_RECOGNITION) .toString().replace("]", "").replace("[", ""); mResultsCallback.onResults(text); } } @Override public void onPartialResults(Bundle partialResults) { // 臨時結果處理 } @Override public void onEvent(int eventType, Bundle params) { } }
MainActivity的界面如下
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns: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="按住說話"/> <TextView android:id="@+id/speechTextView" android:layout_margin="10dp" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
MainActivity的類實現為:
package com.yjp.speechrecognizer; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.MotionEvent; import android.view.View; import android.widget.Button; import android.widget.TextView; public class MainActivity extends AppCompatActivity implements SpeechRecognizerTool.ResultsCallback { private Button mStartSpeechButton; private TextView mTextView; private SpeechRecognizerTool mSpeechRecognizerTool = new SpeechRecognizerTool(this); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTextView = (TextView) findViewById(R.id.speechTextView); mStartSpeechButton = (Button) findViewById(R.id.startSpeechButton); mStartSpeechButton.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { int action = event.getAction(); switch (action) { case MotionEvent.ACTION_DOWN: mSpeechRecognizerTool.startASR(MainActivity.this); mStartSpeechButton.setBackgroundResource( R.drawable.bdspeech_btn_orangelight_pressed); break; case MotionEvent.ACTION_UP: mSpeechRecognizerTool.stopASR(); mStartSpeechButton.setBackgroundResource( R.drawable.bdspeech_btn_orangelight_normal); break; default: return false; } return true; } }); } @Override protected void onStart() { super.onStart(); mSpeechRecognizerTool.createTool(); } @Override protected void onStop() { super.onStop(); mSpeechRecognizerTool.destroyTool(); } @Override public void onResults(String result) { final String finalResult = result; MainActivity.this.runOnUiThread(new Runnable() { @Override public void run() { mTextView.setText(finalResult); } }); } }
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