1.登陸網址https://www.ibm.com/watson/developercloud/speech-to-text.html並註冊

2.開啟網址https://console.ng.bluemix.net/catalog/?category=watson，點選介面左側選單中的Watson,並選擇Speech ToText

3.點選介面最下方的建立按鈕

4.點選新建憑證

5.輸入名稱，點選新增

6.點選檢視憑證，即可看到賬號、密碼和請求地址（憑證建立完成後，不一定能馬上使用，有時需要過一段時間，具體時間不確定，我當天申請的當天測試一直連線不上，兩天後再測的時候就可以了）

7.建立一個工程，將speech-android-wrapper作為library匯入，並新增到工程中，build.gradle中的SDK版本號不要超過23，否則會報org.apache.http找不到，因為該api在23以後更改了
（例子程式碼github地址：https://github.com/watson-developer-cloud/speech-android-sdk）

8.新建的專案中新增依賴

9.主介面佈局

10.授權

    if (initSTT() == false) {
            displayResult("Error: no authentication credentials/token available, please enter your authentication information");
            return;
        }

    private boolean initSTT() {
        // DISCLAIMER: please enter your credentials or token factory in the lines below
        String username = "173e235d-5d3d-453e-9d97-0b0f77bdac19";                         //賬號
        String password = "vjpqIUx0Ss8x";  //密碼
        String serviceURL = "wss://stream.watsonplatform.net/speech-to-text/api";         //伺服器地址

        SpeechConfiguration sConfig = new SpeechConfiguration(SpeechConfiguration.AUDIO_FORMAT_OGGOPUS);
        sConfig.learningOptOut = false; // Change to true to opt-out

        SpeechToText.sharedInstance().initWithContext(this.getHost(serviceURL), context, sConfig);   //設定伺服器地址
        SpeechToText.sharedInstance().setCredentials(username, password);//設定賬號和密碼

        SpeechToText.sharedInstance().setModel("en-US_BroadbandModel");//設定所採集的語言
        SpeechToText.sharedInstance().setDelegate(this);//設定監聽
        return true;
    }
 

if (jsonModels == null) {
            jsonModels = new STTCommands().doInBackground();
            if (jsonModels == null) {
                displayResult("Please, check internet connection.");  //檢測服務是否連線
                return;
            }
        }

}

12.重寫監聽中的方法

public class MainActivity extends Activity implements ISpeechDelegate    //activity實現了該監聽，並複寫監聽中的方法
 

 @Override
    public void onOpen() {//認證開始和伺服器連線上
        Log.d(TAG, "onOpen");
        mState = ConnectionState.CONNECTED;
    }

    @Override
    public void onError(String error) {//連接出錯
        Log.e(TAG, "onError...................." + error);
        mState = ConnectionState.IDLE;
    }

    @Override
    public void onClose(int code, String reason, boolean remote) {//連線關閉
        Log.d(TAG, "onClose, code: " + code + " reason: " + reason);
        mState = ConnectionState.IDLE;
    }

    @Override
    public void onMessage(String message) {//獲取到識別到的資訊並顯示到介面上
        Log.d(TAG, "onMessage, message: " + message);
        try {
            JSONObject jObj = new JSONObject(message);
            // state message
            if (jObj.has("state")) {
                Log.d(TAG, "Status message: " + jObj.getString("state"));
            }
            // results message
            else if (jObj.has("results")) {
                //if has result
                Log.d(TAG, "Results message: ");
                JSONArray jArr = jObj.getJSONArray("results");
                for (int i = 0; i < jArr.length(); i++) {
                    JSONObject obj = jArr.getJSONObject(i);
                    JSONArray jArr1 = obj.getJSONArray("alternatives");
                    String str = jArr1.getJSONObject(0).getString("transcript");
                    // remove whitespaces if the language requires it
//                    String model = "en-US_MichaelVoice";
                    String model = "en-US_BroadbandModel";
                    if (model.startsWith("ja-JP") || model.startsWith("zh-CN")) {
                        str = str.replaceAll("\\s+", "");
                    }
                    String strFormatted = Character.toUpperCase(str.charAt(0)) + str.substring(1);
                    if (obj.getString("final").equals("true")) {
                        String stopMarker = (model.startsWith("ja-JP") || model.startsWith("zh-CN")) ? "。" : ". ";
                        mRecognitionResults += strFormatted.substring(0, strFormatted.length() - 1) + stopMarker;

                        displayResult(mRecognitionResults);
                    } else {
                        displayResult(mRecognitionResults + strFormatted);
                    }
                    break;
                }
            } else {
                displayResult("unexpected data coming from stt server: \n" + message);
            }

        } catch (JSONException e) {
            Log.e(TAG, "Error parsing JSON");
            e.printStackTrace();
        }
    }

 btRecord.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mState == ConnectionState.IDLE) {
                    mState = ConnectionState.CONNECTING;
                    Log.d(TAG, "onClickRecord: IDLE -> CONNECTING");
                    mRecognitionResults = "";
                    displayResult(mRecognitionResults);
                    SpeechToText.sharedInstance().setModel("en-US_BroadbandModel");//設定識別的語言是英語
                    // start recognition
                    new AsyncTask<Void, Void, Void>() {
                        @Override
                        protected Void doInBackground(Void... none) {
                            SpeechToText.sharedInstance().recognize();//開始識別
                            return null;
                        }
                    }.execute();
                    btRecord.setText("Connecting...");
                }
            }
        });

14.停止識別

 btStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mState == ConnectionState.CONNECTED) {
                    mState = ConnectionState.IDLE;
                    Log.d(TAG, "onClickRecord: CONNECTED -> IDLE");
                    SpeechToText.sharedInstance().stopRecognition();                                   //停止識別
                    btRecord.setText("Record");
                }
            }
        });

注：1.build.gradle中的compile和build版本不要超過21

2.伺服器是國外的，需要連線vpn

3.在回撥方法中，是子執行緒，不要進行更改介面的操作，如果需要更新介面，需先執行在主執行緒

參考資料：

https://www.ibm.com/watson/developercloud/speech-to-text.html