Android studio 此处地图中的语音说明不起作用

我想通过Android上的HERE Maps实现语音指令，我使用了示例代码“LiveSightGuidanceActivity”，并从中添加了与语音指令相关的代码 但是声音不起作用！我发现了错误

E/MediaPlayer:应已设置字幕控制器

下面是示例中的一段代码

  // Setup navigation manager
        m_navigationManager = NavigationManager.getInstance();
        m_navigationManager.setMap(m_map);
        m_navigationManager.setMapUpdateMode(MapUpdateMode.NONE); // No need to update map as LiveSight already does so
        attachNavigationListeners();

        stopNavigationManager();



        // Disable navigation sounds
        m_audioFlags = m_navigationManager.getEnabledAudioEvents();
        m_navigationManager.setEnabledAudioEvents(EnumSet.allOf((NavigationManager.AudioEvent.class))); // it was nonOf

        // Disable traffic avoidance mode as we use pedestrian guidance
        m_navigationManager.setTrafficAvoidanceMode(TrafficAvoidanceMode.DISABLE);


        // Start navigation in Simulation Mode
        NavigationManager.Error error = m_navigationManager.simulate(m_liveSightMapRoute.getRoute(), SIMULATION_SPEED);

        if (error != NavigationManager.Error.NONE) {
            Toast.makeText(getApplicationContext(), "Failed to start navigation. Error: " + error, Toast.LENGTH_LONG).show();
            m_navigationManager.setMap(null);
            return;
        }



        m_navigationManager.setNaturalGuidanceMode(EnumSet.of(NavigationManager.NaturalGuidanceMode.JUNCTION));
        setupVoice();

下面是完整的setupVoice（）方法

private void setupVoice（）{
//声明听众
//在每个回调中添加特定于应用程序的逻辑。
instructListener=new NavigationManager.NewInstructionEventListener（）{
@凌驾
公共结构事件（）{
//解释并呈现包含的机动对象
//针对用户的逐段导航说明。
m_navigationManager.getNextManeuver（）；
}
};
positionListener=new NavigationManager.positionListener（）{
@凌驾
已更新公共位置（地理位置loc）{
//我们在这个回调中得到的位置可以使用
//重新定位地图并更改方向的步骤。
loc.getCoordinate（）；
loc.getHeading（）；
loc.getSpeed（）；
//另外，剩余的时间和距离也可以
//从导航管理器获取
m_navigationManager.getTimeOarRival（对，
路线。交通处罚模式（禁用）；
m_navigationManager.getDestinationDistance（）；
}
};
//开始收听导航事件
m_navigationManager.addNewInstructionEventListener(
新WeakReference（instructListener））；
//开始收听位置事件
m_navigationManager.addPositionListener(
新WeakReference（positionListener））；
//检索VoiceCatalog并下载最新更新
VoiceCatalog=VoiceCatalog.getInstance（）；
如果（！voiceCatalog.isLocalCatalogAvailable（））{
Log.d（标记“语音目录在本地存储中不可用”）；
//Toast.makeText（mActivity.getApplicationContext（），“语音目录在本地存储中不可用。”，Toast.LENGTH_LONG）.show（）；
下载目录（new voiceCatalog.OnDownloadDoneListener（）{
@凌驾
公共无效onDownloadDone（VoiceCatalog.Error）{
if（error==VoiceCatalog.error.NONE）{
//目录下载成功
Log.d（标记“成功下载语音目录”）；
//Toast.makeText（mActivity.getApplicationContext（），“语音目录下载成功”，Toast.LENGTH\u LONG.show（）；
}否则{
Log.d（标记“下载语音目录失败”）；
//Toast.makeText（mActivity.getApplicationContext（），“语音目录下载错误”，Toast.LENGTH_LONG）.show（）；
}
//从语音目录列表中获取语音包列表
列出语音包=
VoiceCatalog.getInstance（）.getCatalogList（）；
if（voicePackages.size（）==0）{
Log.d（标记“语音目录大小为0”）；
//Toast.makeText（mActivity.getApplicationContext（），“语音目录大小为0.”，Toast.LENGTH_LONG.show（）；
}
长id=-1；
//挑选
用于（语音包语音包：语音包）{
if（voicePackage.getMarcCode（）.compareToIgnoreCase（“eng”）==0）{
if（voicePackage.isTts（））//TODO:需要弄清楚为什么总是返回false
{
id=voicePackage.getId（）；
打破
}
}
}
如果（！VoiceCatalog.getInstance（）.isLocalVoiceSkin（id））{
最终长finalId=id；
VoiceCatalog.getInstance（）.downloadVoice（id，new VoiceCatalog.OnDownloadDoneListener（））{
@凌驾
公共无效onDownloadDone（VoiceCatalog.Error）{
if（error==VoiceCatalog.error.NONE）{
//语音皮肤下载成功
Log.d（标记“成功下载语音皮肤”）；
//Toast.makeText（mActivity.getApplicationContext（），“Voice skin下载成功”，Toast.LENGTH_LONG.show（）；
//设置语音外观以供导航管理器使用
if（VoiceCatalog.getInstance（）.getLocalVoiceSkin（finalId）！=null）{
m_navigationManager.setVoiceSkin（VoiceCatalog.getInstance（）.getLocalVoiceSkin（finalId））；
}否则{
Log.d（标记“获取本地语音皮肤错误”）；
//Toast.makeText（mActivity.getApplicationContext（），“Navi管理器设置语音皮肤错误”，Toast.LENGTH_LONG）.show（）；
}
}否则{
Log.d（标签“下载语音皮肤失败”）；
//Toast.makeText（mActivity.getApplicationContext（），“语音皮肤下载错误”，Toast.LENGTH_LONG.show（）；
}
}
});
}否则{
//设置语音外观以供导航管理器使用
 private void setupVoice() {

        // declare the listeners
// add application specific logic in each of the callbacks.

      instructListener = new NavigationManager.NewInstructionEventListener() {

            @Override
            public void onNewInstructionEvent() {
                // Interpret and present the Maneuver object as it contains
                // turn by turn navigation instructions for the user.
                m_navigationManager.getNextManeuver();
            }
        };

        positionListener = new NavigationManager.PositionListener() {

            @Override
            public void onPositionUpdated(GeoPosition loc) {
                // the position we get in this callback can be used
                // to reposition the map and change orientation.
                loc.getCoordinate();
                loc.getHeading();
                loc.getSpeed();

                // also remaining time and distance can be
                // fetched from navigation manager
                m_navigationManager.getTimeToArrival(true,
                        Route.TrafficPenaltyMode.DISABLED);
                m_navigationManager.getDestinationDistance();
            }
        };

        // start listening to navigation events
        m_navigationManager.addNewInstructionEventListener(
                new WeakReference<NavigationManager.NewInstructionEventListener>(instructListener));

        // start listening to position events
        m_navigationManager.addPositionListener(
                new WeakReference<NavigationManager.PositionListener>(positionListener));

        // Retrieve the VoiceCatalog and download the latest updates
        VoiceCatalog voiceCatalog = VoiceCatalog.getInstance();

        if (!voiceCatalog.isLocalCatalogAvailable()) {
            Log.d(TAG, "Voice catalog is not available in local storage.");
            //Toast.makeText(mActivity.getApplicationContext(), "Voice catalog is not available in local storage.", Toast.LENGTH_LONG).show();

            voiceCatalog.downloadCatalog(new VoiceCatalog.OnDownloadDoneListener() {
                @Override
                public void onDownloadDone(VoiceCatalog.Error error) {
                    if (error == VoiceCatalog.Error.NONE) {
                        // catalog download successful
                        Log.d(TAG, "Download voice catalog successfully.");

                        //Toast.makeText(mActivity.getApplicationContext(), "Voice catalog download successful.", Toast.LENGTH_LONG).show();
                    } else {
                        Log.d(TAG, "Download voice catalog failed.");

                        //Toast.makeText(mActivity.getApplicationContext(), "Voice catalog download error.", Toast.LENGTH_LONG).show();
                    }

                    // Get the list of voice packages from the voice catalog list
                    List<VoicePackage> voicePackages =
                            VoiceCatalog.getInstance().getCatalogList();
                    if (voicePackages.size() == 0) {
                        Log.d(TAG, "Voice catalog size is 0.");

                        //Toast.makeText(mActivity.getApplicationContext(), "Voice catalog size is 0.", Toast.LENGTH_LONG).show();
                    }

                    long id = -1;
                    // select
                    for (VoicePackage voicePackage : voicePackages) {
                        if (voicePackage.getMarcCode().compareToIgnoreCase("eng") == 0) {
                            if (voicePackage.isTts()) // TODO: need to figure out why always return false
                            {
                                id = voicePackage.getId();
                                break;
                            }
                        }
                    }

                    if (!VoiceCatalog.getInstance().isLocalVoiceSkin(id)) {
                        final long finalId = id;
                        VoiceCatalog.getInstance().downloadVoice(id, new VoiceCatalog.OnDownloadDoneListener() {
                            @Override
                            public void onDownloadDone(VoiceCatalog.Error error) {
                                if (error == VoiceCatalog.Error.NONE) {
                                    //voice skin download successful
                                    Log.d(TAG, "Download voice skin successfully.");

                                    //Toast.makeText(mActivity.getApplicationContext(), "Voice skin download successful.", Toast.LENGTH_LONG).show();

                                    // set the voice skin for use by navigation manager
                                    if (VoiceCatalog.getInstance().getLocalVoiceSkin(finalId) != null) {
                                        m_navigationManager.setVoiceSkin(VoiceCatalog.getInstance().getLocalVoiceSkin(finalId));
                                    } else {
                                        Log.d(TAG, "Get local voice skin error.");

                                        //Toast.makeText(mActivity.getApplicationContext(), "Navi manager set voice skin error.", Toast.LENGTH_LONG).show();
                                    }

                                } else {
                                    Log.d(TAG, "Download voice skin failed.");
                                    //Toast.makeText(mActivity.getApplicationContext(), "Voice skin download error.", Toast.LENGTH_LONG).show();
                                }

                            }
                        });
                    } else {
                        // set the voice skin for use by navigation manager
                        if (VoiceCatalog.getInstance().getLocalVoiceSkin(id) != null) {
                            m_navigationManager.setVoiceSkin(VoiceCatalog.getInstance().getLocalVoiceSkin(id));
                        } else {
                            Log.d(TAG, "Get local voice skin error.");
                            //Toast.makeText(mActivity.getApplicationContext(), "Navi manager set voice skin error.", Toast.LENGTH_LONG).show();
                        }
                    }
                }
            });
        }
    }

List localInstalledSkins = VoiceCatalog.getInstance().getLocalVoiceSkins();

VoiceCatalog.getInstance().downloadCatalog(VoiceCatalog.OnDownloadDoneListener)

List packages = VoiceCatalog.getInstance().getCatalogList();

VoiceCatalog.getInstance().downloadVoice(skin_id_from_catalog_you_want_to_use, VoiceCatalog.OnDownloadDoneListener)

NavigationManager.getInstance().setVoiceSkin(VoiceCatalog.getInstance().getLocalVoiceSkin(skin_id_you_want_to_use))