Ошибки WebView, HttpURLConnection, ExoPlayer и поставщика контента

Question

Не могу понять, зачем мне нужно реализовывать контент-провайдера и / или контентную информацию и как это сделать. Я читал о нескольких вещах и не нашел и не смог прийти к какому-либо заключению или решению.

Приложение создано для Android TV (API 27) и основано на WebView, HttpURLConnection и ExoPlayer. WebView и ExoPlayer используют кеш, но, хотя я и удостоверяюсь, что они не используют кеш, ошибка все равно возникает. Я также не смог найти ссылку между URL и WebView, HttpURLConnection и ExoPlayer и ошибкой.

Так почему я получаю эту ошибку и как от нее избавиться?

Ошибка:

2019-03-06 21:55:17.102 2105-2105/com.google.android.tvlauncher E/PrtnrWidgetInfoLdr: Exception in onStartLoading() on registering content observer
    java.lang.SecurityException: Failed to find provider tvlauncher.widget for user 0; expected to find a valid ContentProvider for this authority
        at android.os.Parcel.readException(Parcel.java:2004)
        at android.os.Parcel.readException(Parcel.java:1950)
        at android.content.IContentService$Stub$Proxy.registerContentObserver(IContentService.java:768)
        at android.content.ContentResolver.registerContentObserver(ContentResolver.java:1924)
        at android.content.ContentResolver.registerContentObserver(ContentResolver.java:1913)
        at com.google.android.tvlauncher.data.PartnerWidgetInfoLoader.onStartLoading(PartnerWidgetInfoLoader.java:66)
        at android.content.Loader.startLoading(Loader.java:290)
        at android.app.LoaderManagerImpl$LoaderInfo.start(LoaderManager.java:283)
        at android.app.LoaderManagerImpl.doStart(LoaderManager.java:783)
        at android.app.Fragment.onStart(Fragment.java:1631)
        at com.google.android.tvlauncher.home.HomeFragment.onStart(HomeFragment.java:239)
        at android.app.Fragment.performStart(Fragment.java:2534)
        at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1315)
        at android.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1557)
        at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1618)
        at android.app.FragmentManagerImpl.dispatchMoveToState(FragmentManager.java:3027)
        at android.app.FragmentManagerImpl.dispatchStart(FragmentManager.java:2984)
        at android.app.FragmentController.dispatchStart(FragmentController.java:189)
        at android.app.Activity.performStart(Activity.java:7035)
        at android.app.Activity.performRestart(Activity.java:7104)
        at android.app.Activity.performResume(Activity.java:7109)
        at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3556)
        at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3621)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1638)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
2019-03-06 21:55:17.106 2105-32408/com.google.android.tvlauncher E/ActivityThread: Failed to find provider info for tvlauncher.widget

Возможно соответствующий раздел кода:

Основная деятельность:

public class DTV extends Activity {
    private final String url = "a https url";

    [...]

    // Setup WebView and load the content
    private void loadDTVapp() {
        WebSettings dtvAppViewSettings = dtvAppView.getSettings();

        [...]

        // Enable cache
        dtvAppViewSettings.setAppCachePath(this.getCacheDir().getAbsolutePath());
        dtvAppViewSettings.setAppCacheEnabled(true);
        dtvAppViewSettings.setCacheMode(WebSettings.LOAD_DEFAULT);

        [...]

        // Set origin policy
        dtvAppViewSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_COMPATIBILITY_MODE);

        // Enable JavaScript support
        dtvAppViewSettings.setJavaScriptEnabled(true);

        // Implement some missing features
        dtvAppView.addJavascriptInterface(new extendJSInterface(), "DTV"); // showPlayer and onCloseApp
        dtvAppView.setWebViewClient(new WebClient()); // Remaining implementations (Loading icon, injection etc)

        // Getting/load/start the DTV HTTP app
        dtvAppView.loadUrl(url);

    [...]
    private class WebClient extends WebViewClient {
        [...]

        public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
            [...]

            // Adapt main content
            if (_url.equals(url)) {
                [...]
                        // Create connection
                        HttpURLConnection conn = (HttpURLConnection) new URL(_url).openConnection();
                        try {
                            if (conn.getResponseCode() == 200) {
                                // Get encoding
                                String encoding = "utf-8";
                                String[] contentTypeParts = conn.getContentType().split(";\\s*charset\\s*=");
                                if (contentTypeParts.length > 1) {
                                    encoding = contentTypeParts[1];
                                }

                                // Read content and inject js
                                String content = injection(readStream(conn.getInputStream(), encoding));

                                // Headers
                                Map<String, String> headers = new HashMap<>();
                                for (Map.Entry<String, List<String>> entries : conn.getHeaderFields().entrySet()) {
                                    if (entries.getKey() == null) {
                                        headers.put("Status-Code-Originally", entries.getValue().get(0));
                                    } else if (entries.getKey().equalsIgnoreCase("client-via")) {
                                        headers.put("Client-Via-Originally", entries.getValue().get(0));
                                    } else if (entries.getKey().equalsIgnoreCase("content-type")) {
                                        headers.put("Content-Type-Originally", entries.getValue().get(0));
                                    } else if (entries.getKey().equalsIgnoreCase("content-length")) {
                                        headers.put("Content-Length-Originally", entries.getValue().get(0));
                                    } else {
                                        headers.put(entries.getKey(), entries.getValue().get(0));
                                    }
                                }

                                // Return new response
                                return new WebResourceResponse("text/html", encoding, 200, "OK", headers,
                                        new ByteArrayInputStream(content.getBytes(encoding)));
                            }
                        } finally {
                            conn.disconnect();
                        }
    [...]

Активность игрока:

public class DTVPlayer extends Activity {
    [...]
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        [...]

        defaultMediaSource = new ExtractorMediaSource.Factory(
            new CacheDataSourceFactory(
                VideoCache.getInstance(this),
                new DefaultHttpDataSourceFactory(userAgent)));

[...]

class VideoCache {
    private static SimpleCache sDownloadCache;

    static SimpleCache getInstance(Context context) {
        if (sDownloadCache == null) {
            sDownloadCache = new SimpleCache(
                new File(context.getCacheDir(), "video_cache"),
                new LeastRecentlyUsedCacheEvictor(25*1024*1024)
            );
        }
        return sDownloadCache;
    }
}