Android и ACRCloud: startRecording() вызывается для неинициализированного AudioRecord

Я разрабатываю простое приложение для распознавания музыки, используя этот SDK https://www.acrcloud.com/docs/audio-fingerprinting-sdks/android-sdk/

Демонстрация, предоставленная SDK, отлично работает на моем телефоне, целевой Android SDK — 18. В настоящее время я разрабатываю это приложение для minSdkVersion 19и targetSdkVersion 24. С точки зрения кода, ничто не отличается от демо, кроме макета Activity.

Вот мой код:

import com.dd.CircularProgressButton;

import com.acrcloud.rec.sdk.ACRCloudConfig;
import com.acrcloud.rec.sdk.ACRCloudClient;
import com.acrcloud.rec.sdk.IACRCloudListener;
import com.acrcloud.rec.sdk.utils.ACRCloudLogger;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class MainActivity extends AppCompatActivity implements IACRCloudListener {

    //Main recognition class and config objects
    private ACRCloudClient mClient;
    private ACRCloudConfig mConfig;

    private TextView successOrFail;

    private CircularProgressButton recognitionButton;

    //recognition flags
    private boolean mProcessing = false;
    private boolean initState = false;

    //path for local db, if necessary
    //private String path = "";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity);


        recognitionButton = (CircularProgressButton) findViewById(R.id.startRecognition);
        recognitionButton.setIndeterminateProgressMode(true);
        recognitionButton.setText(R.string.rec_start);
        recognitionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                start();
                recognitionButton.setProgress(50);
            }
        });

        final CircularProgressButton cancelButton = (CircularProgressButton) findViewById(R.id.stopRecogition);
        cancelButton.setText(R.string.rec_cancel);
        cancelButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                cancel();
                cancelButton.setProgress(-1);
            }
        });

        successOrFail = (TextView) findViewById(R.id.successOrFailView);

        //Configure ACRCloud
        this.mConfig = new ACRCloudConfig();
        this.mConfig.acrcloudListener = this;
        this.mConfig.context = this;
        this.mConfig.host = "xxxxxxxxxxxxxx";
        this.mConfig.accessKey = "xxxxxxxxxxxxxxxx";
        this.mConfig.accessSecret = "xxxxxxxxxxxxxxxx";
        this.mConfig.reqMode = ACRCloudConfig.ACRCloudRecMode.REC_MODE_REMOTE;

        this.mClient = new ACRCloudClient();

        this.initState = this.mClient.initWithConfig(this.mConfig);
        if (this.initState) {
            this.mClient.startPreRecord(3000);
        }
    }


    //Start recognition
    public void start() {
        if (!this.initState) {
            Toast.makeText(this, "init error", Toast.LENGTH_SHORT).show();
            return;
        }

        if (!mProcessing) {
            mProcessing = true;
            if (this.mClient == null || !this.mClient.startRecognize()) {
                mProcessing = false;
                //mResult.setText("start error!");
            }
        }
    }

    //recognition canceled
    protected void cancel(){
        if(mProcessing && this.mClient != null){
            mProcessing = false;
            this.mClient.cancel();
        }
    }


    //handle result
    @Override
    public void onResult(String result) {
        if (this.mClient != null) {
            this.mClient.cancel();
            mProcessing = false;
        }


        try {
            JSONObject j = new JSONObject(result);
            JSONObject j1 = j.getJSONObject("status");
            int j2 = j1.getInt("code");
            if(j2 == 0){
                successOrFail.setVisibility(View.VISIBLE);
                successOrFail.setText(R.string.success);
                recognitionButton.setProgress(100);
            }else{
                successOrFail.setVisibility(View.VISIBLE);
                successOrFail.setText(R.string.error);
                recognitionButton.setProgress(0);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onVolumeChanged(double volume){

    }


    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.e("MainActivity", "release");
        if (this.mClient != null) {
            this.mClient.release();
            this.initState = false;
            this.mClient = null;
        }
    }
}

и я получаю это исключение

08-31 16:38:20.119 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err: java.lang.IllegalStateException: startRecording() called on an uninitialized AudioRecord.
08-31 16:38:20.119 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err:     at android.media.AudioRecord.startRecording(AudioRecord.java:943)
08-31 16:38:20.119 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err:     at com.acrcloud.rec.record.ACRCloudRecorder.startRecording(ACRCloudRecorder.java:64)
08-31 16:38:20.119 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err:     at com.acrcloud.rec.sdk.worker.ACRCloudWorker.run(ACRCloudWorker.java:215)
08-31 16:38:20.139 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
08-31 16:38:20.139 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
08-31 16:38:21.789 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err: java.lang.IllegalStateException: stop() called on an uninitialized AudioRecord.
08-31 16:38:21.789 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err:     at android.media.AudioRecord.stop(AudioRecord.java:996)
08-31 16:38:21.789 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err:     at com.acrcloud.rec.record.ACRCloudRecorder.release(ACRCloudRecorder.java:133)
08-31 16:38:21.789 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err:     at com.acrcloud.rec.sdk.worker.ACRCloudWorker.resumeRecognize(ACRCloudWorker.java:126)
08-31 16:38:21.789 29895-30448/musicmappr.abon219.com.musicmappr_prototype1 W/System.err:     at com.acrcloud.rec.sdk.worker.ACRCloudWorker.run(ACRCloudWorker.java:222)

любые советы по этому вопросу будут очень, очень признательны