Merge branch 'develop' into make_multidex_on_debug_build_only

2 files changed, 69 insertions, 1218 deletions

diff --git a/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceController.java b/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceController.java
deleted file mode 100644
index 31b2cbcb2..000000000
--- a/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceController.java
+++ /dev/null
@@ -1,1218 +0,0 @@
-package de.danoeh.antennapod.preferences;
-
-import android.Manifest;
-import android.annotation.SuppressLint;
-import android.app.Activity;
-import android.app.ProgressDialog;
-import android.app.TimePickerDialog;
-import android.content.ActivityNotFoundException;
-import android.content.Context;
-import android.content.Intent;
-import android.content.SharedPreferences;
-import android.content.pm.PackageManager;
-import android.content.pm.ResolveInfo;
-import android.content.res.Resources;
-import android.net.Uri;
-import android.net.wifi.WifiConfiguration;
-import android.net.wifi.WifiManager;
-import android.os.Build;
-import android.os.Bundle;
-import android.support.design.widget.Snackbar;
-import android.support.v4.app.ActivityCompat;
-import android.support.v4.content.FileProvider;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.preference.CheckBoxPreference;
-import android.support.v7.preference.ListPreference;
-import android.support.v7.preference.Preference;
-import android.support.v7.preference.PreferenceFragmentCompat;
-import android.support.v7.preference.PreferenceManager;
-import android.support.v7.preference.PreferenceScreen;
-import android.text.Html;
-import android.text.format.DateFormat;
-import android.text.format.DateUtils;
-import android.util.Log;
-import android.widget.ListView;
-import android.widget.Toast;
-
-import com.afollestad.materialdialogs.MaterialDialog;
-import com.bytehamster.lib.preferencesearch.SearchConfiguration;
-import com.bytehamster.lib.preferencesearch.SearchPreference;
-
-import org.apache.commons.lang3.ArrayUtils;
-
-import java.io.File;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Calendar;
-import java.util.Collections;
-import java.util.GregorianCalendar;
-import java.util.List;
-import java.util.concurrent.TimeUnit;
-
-import de.danoeh.antennapod.CrashReportWriter;
-import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.activity.AboutActivity;
-import de.danoeh.antennapod.activity.DirectoryChooserActivity;
-import de.danoeh.antennapod.activity.ImportExportActivity;
-import de.danoeh.antennapod.activity.MainActivity;
-import de.danoeh.antennapod.activity.MediaplayerActivity;
-import de.danoeh.antennapod.activity.OpmlImportFromPathActivity;
-import de.danoeh.antennapod.activity.PreferenceActivity;
-import de.danoeh.antennapod.activity.StatisticsActivity;
-import de.danoeh.antennapod.asynctask.ExportWorker;
-import de.danoeh.antennapod.core.export.ExportWriter;
-import de.danoeh.antennapod.core.export.html.HtmlWriter;
-import de.danoeh.antennapod.core.export.opml.OpmlWriter;
-import de.danoeh.antennapod.core.preferences.GpodnetPreferences;
-import de.danoeh.antennapod.core.preferences.UserPreferences;
-import de.danoeh.antennapod.core.service.GpodnetSyncService;
-import de.danoeh.antennapod.core.util.flattr.FlattrUtils;
-import de.danoeh.antennapod.core.util.gui.PictureInPictureUtil;
-import de.danoeh.antennapod.dialog.AuthenticationDialog;
-import de.danoeh.antennapod.dialog.AutoFlattrPreferenceDialog;
-import de.danoeh.antennapod.dialog.ChooseDataFolderDialog;
-import de.danoeh.antennapod.dialog.GpodnetSetHostnameDialog;
-import de.danoeh.antennapod.dialog.ProxyDialog;
-import de.danoeh.antennapod.dialog.VariableSpeedDialog;
-import io.reactivex.Observable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-
-import static de.danoeh.antennapod.activity.PreferenceActivity.PARAM_RESOURCE;
-
-/**
- * Sets up a preference UI that lets the user change user preferences.
- */
-
-public class PreferenceController implements SharedPreferences.OnSharedPreferenceChangeListener {
-
-    private static final String TAG = "PreferenceController";
-
-    private static final String PREF_SCREEN_USER_INTERFACE = "prefScreenInterface";
-    private static final String PREF_SCREEN_PLAYBACK = "prefScreenPlayback";
-    private static final String PREF_SCREEN_NETWORK = "prefScreenNetwork";
-    private static final String PREF_SCREEN_INTEGRATIONS = "prefScreenIntegrations";
-    private static final String PREF_SCREEN_STORAGE = "prefScreenStorage";
-    private static final String PREF_SCREEN_AUTODL = "prefAutoDownloadSettings";
-    private static final String PREF_SCREEN_FLATTR = "prefFlattrSettings";
-    private static final String PREF_SCREEN_GPODDER = "prefGpodderSettings";
-
-    private static final String PREF_FLATTR_AUTH = "pref_flattr_authenticate";
-    private static final String PREF_FLATTR_REVOKE = "prefRevokeAccess";
-    private static final String PREF_AUTO_FLATTR_PREFS = "prefAutoFlattrPrefs";
-    private static final String PREF_OPML_EXPORT = "prefOpmlExport";
-    private static final String PREF_OPML_IMPORT = "prefOpmlImport";
-    private static final String PREF_HTML_EXPORT = "prefHtmlExport";
-    private static final String STATISTICS = "statistics";
-    private static final String IMPORT_EXPORT = "importExport";
-    private static final String PREF_ABOUT = "prefAbout";
-    private static final String PREF_CHOOSE_DATA_DIR = "prefChooseDataDir";
-    private static final String PREF_PLAYBACK_SPEED_LAUNCHER = "prefPlaybackSpeedLauncher";
-    private static final String PREF_PLAYBACK_REWIND_DELTA_LAUNCHER = "prefPlaybackRewindDeltaLauncher";
-    private static final String PREF_PLAYBACK_FAST_FORWARD_DELTA_LAUNCHER = "prefPlaybackFastForwardDeltaLauncher";
-    private static final String PREF_GPODNET_LOGIN = "pref_gpodnet_authenticate";
-    private static final String PREF_GPODNET_SETLOGIN_INFORMATION = "pref_gpodnet_setlogin_information";
-    private static final String PREF_GPODNET_SYNC = "pref_gpodnet_sync";
-    private static final String PREF_GPODNET_FORCE_FULL_SYNC = "pref_gpodnet_force_full_sync";
-    private static final String PREF_GPODNET_LOGOUT = "pref_gpodnet_logout";
-    private static final String PREF_GPODNET_HOSTNAME = "pref_gpodnet_hostname";
-    private static final String PREF_GPODNET_NOTIFICATIONS = "pref_gpodnet_notifications";
-    private static final String PREF_EXPANDED_NOTIFICATION = "prefExpandNotify";
-    private static final String PREF_PROXY = "prefProxy";
-    private static final String PREF_KNOWN_ISSUES = "prefKnownIssues";
-    private static final String PREF_FAQ = "prefFaq";
-    private static final String PREF_SEND_CRASH_REPORT = "prefSendCrashReport";
-    private static final String[] EXTERNAL_STORAGE_PERMISSIONS = {
-            Manifest.permission.READ_EXTERNAL_STORAGE,
-            Manifest.permission.WRITE_EXTERNAL_STORAGE };
-    private static final int PERMISSION_REQUEST_EXTERNAL_STORAGE = 41;
-    private final PreferenceUI ui;
-    private final SharedPreferences.OnSharedPreferenceChangeListener gpoddernetListener =
-            (sharedPreferences, key) -> {
-                if (GpodnetPreferences.PREF_LAST_SYNC_ATTEMPT_TIMESTAMP.equals(key)) {
-                    updateLastGpodnetSyncReport(GpodnetPreferences.getLastSyncAttemptResult(),
-                            GpodnetPreferences.getLastSyncAttemptTimestamp());
-                }
-            };
-    private CheckBoxPreference[] selectedNetworks;
-    private Disposable disposable;
-
-    public PreferenceController(PreferenceUI ui) {
-        this.ui = ui;
-        PreferenceManager.getDefaultSharedPreferences(ui.getActivity().getApplicationContext())
-            .registerOnSharedPreferenceChangeListener(this);
-    }
-
-    @Override
-    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-
-    }
-
-
-
-    public void onCreate(int screen) {
-        switch (screen) {
-            case R.xml.preferences:
-                setupMainScreen();
-                break;
-            case R.xml.preferences_network:
-                setupNetworkScreen();
-                break;
-            case R.xml.preferences_autodownload:
-                setupAutoDownloadScreen();
-                buildAutodownloadSelectedNetworksPreference();
-                setSelectedNetworksEnabled(UserPreferences.isEnableAutodownloadWifiFilter());
-                buildEpisodeCleanupPreference();
-                break;
-            case R.xml.preferences_playback:
-                setupPlaybackScreen();
-                PreferenceControllerFlavorHelper.setupFlavoredUI(ui);
-                buildSmartMarkAsPlayedPreference();
-                break;
-            case R.xml.preferences_integrations:
-                setupIntegrationsScreen();
-                break;
-            case R.xml.preferences_flattr:
-                setupFlattrScreen();
-                break;
-            case R.xml.preferences_gpodder:
-                setupGpodderScreen();
-                break;
-            case R.xml.preferences_storage:
-                setupStorageScreen();
-                break;
-            case R.xml.preferences_user_interface:
-                setupInterfaceScreen();
-                break;
-        }
-    }
-
-    private void setupInterfaceScreen() {
-        final Activity activity = ui.getActivity();
-
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
-            // disable expanded notification option on unsupported android versions
-            ui.findPreference(PreferenceController.PREF_EXPANDED_NOTIFICATION).setEnabled(false);
-            ui.findPreference(PreferenceController.PREF_EXPANDED_NOTIFICATION).setOnPreferenceClickListener(
-                    preference -> {
-                        Toast toast = Toast.makeText(activity,
-                                R.string.pref_expand_notify_unsupport_toast, Toast.LENGTH_SHORT);
-                        toast.show();
-                        return true;
-                    }
-            );
-        }
-        ui.findPreference(UserPreferences.PREF_THEME)
-                .setOnPreferenceChangeListener(
-                        (preference, newValue) -> {
-                            Intent i = new Intent(activity, MainActivity.class);
-                            i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK
-                                    | Intent.FLAG_ACTIVITY_NEW_TASK);
-                            activity.finish();
-                            activity.startActivity(i);
-                            return true;
-                        }
-                );
-        ui.findPreference(UserPreferences.PREF_HIDDEN_DRAWER_ITEMS)
-                .setOnPreferenceClickListener(preference -> {
-                    showDrawerPreferencesDialog();
-                    return true;
-                });
-
-        ui.findPreference(UserPreferences.PREF_COMPACT_NOTIFICATION_BUTTONS)
-                .setOnPreferenceClickListener(preference -> {
-                    showNotificationButtonsDialog();
-                    return true;
-                });
-
-        ui.findPreference(UserPreferences.PREF_BACK_BUTTON_BEHAVIOR)
-                .setOnPreferenceChangeListener((preference, newValue) -> {
-                        if (newValue.equals("page")) {
-                            final Context context = ui.getActivity();
-                            final String[] navTitles = context.getResources().getStringArray(R.array.back_button_go_to_pages);
-                            final String[] navTags = context.getResources().getStringArray(R.array.back_button_go_to_pages_tags);
-                            final String choice[] = { UserPreferences.getBackButtonGoToPage() };
-
-                            AlertDialog.Builder builder = new AlertDialog.Builder(context);
-                            builder.setTitle(R.string.back_button_go_to_page_title);
-                            builder.setSingleChoiceItems(navTitles, ArrayUtils.indexOf(navTags, UserPreferences.getBackButtonGoToPage()), (dialogInterface, i) -> {
-                                if (i >= 0) {
-                                    choice[0] = navTags[i];
-                                }
-                            });
-                            builder.setPositiveButton(R.string.confirm_label, (dialogInterface, i) -> UserPreferences.setBackButtonGoToPage(choice[0]));
-                            builder.setNegativeButton(R.string.cancel_label, null);
-                            builder.create().show();
-                            return true;
-                        } else {
-                            return true;
-                        }
-                    });
-
-        if (Build.VERSION.SDK_INT >= 26) {
-            ui.findPreference(UserPreferences.PREF_EXPANDED_NOTIFICATION).setVisible(false);
-        }
-    }
-
-    private void setupStorageScreen() {
-        final Activity activity = ui.getActivity();
-
-        ui.findPreference(PreferenceController.IMPORT_EXPORT).setOnPreferenceClickListener(
-                preference -> {
-                    activity.startActivity(new Intent(activity, ImportExportActivity.class));
-                    return true;
-                }
-        );
-        ui.findPreference(PreferenceController.PREF_OPML_EXPORT).setOnPreferenceClickListener(
-                preference -> export(new OpmlWriter()));
-        ui.findPreference(PreferenceController.PREF_HTML_EXPORT).setOnPreferenceClickListener(
-                preference -> export(new HtmlWriter()));
-        ui.findPreference(PreferenceController.PREF_OPML_IMPORT).setOnPreferenceClickListener(
-                preference -> {
-                    activity.startActivity(new Intent(activity, OpmlImportFromPathActivity.class));
-                    return true;
-                });
-        ui.findPreference(PreferenceController.PREF_CHOOSE_DATA_DIR).setOnPreferenceClickListener(
-                preference -> {
-                    if (Build.VERSION_CODES.KITKAT <= Build.VERSION.SDK_INT &&
-                            Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP_MR1) {
-                        showChooseDataFolderDialog();
-                    } else {
-                        int readPermission = ActivityCompat.checkSelfPermission(
-                                activity, Manifest.permission.READ_EXTERNAL_STORAGE);
-                        int writePermission = ActivityCompat.checkSelfPermission(
-                                activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
-                        if (readPermission == PackageManager.PERMISSION_GRANTED &&
-                                writePermission == PackageManager.PERMISSION_GRANTED) {
-                            openDirectoryChooser();
-                        } else {
-                            requestPermission();
-                        }
-                    }
-                    return true;
-                }
-        );
-        ui.findPreference(PreferenceController.PREF_CHOOSE_DATA_DIR)
-                .setOnPreferenceClickListener(
-                        preference -> {
-                            if (Build.VERSION.SDK_INT >= 19) {
-                                showChooseDataFolderDialog();
-                            } else {
-                                Intent intent = new Intent(activity, DirectoryChooserActivity.class);
-                                activity.startActivityForResult(intent,
-                                        DirectoryChooserActivity.RESULT_CODE_DIR_SELECTED);
-                            }
-                            return true;
-                        }
-                );
-        ui.findPreference(UserPreferences.PREF_IMAGE_CACHE_SIZE).setOnPreferenceChangeListener(
-                (preference, o) -> {
-                    if (o instanceof String) {
-                        int newValue = Integer.parseInt((String) o) * 1024 * 1024;
-                        if (newValue != UserPreferences.getImageCacheSize()) {
-                            AlertDialog.Builder dialog = new AlertDialog.Builder(ui.getActivity());
-                            dialog.setTitle(android.R.string.dialog_alert_title);
-                            dialog.setMessage(R.string.pref_restart_required);
-                            dialog.setPositiveButton(android.R.string.ok, null);
-                            dialog.show();
-                        }
-                        return true;
-                    }
-                    return false;
-                }
-        );
-    }
-
-    private void setupIntegrationsScreen() {
-        final AppCompatActivity activity = ui.getActivity();
-
-        ui.findPreference(PREF_SCREEN_FLATTR).setOnPreferenceClickListener(preference -> {
-            openScreen(R.xml.preferences_flattr, activity);
-            return true;
-        });
-        ui.findPreference(PREF_SCREEN_GPODDER).setOnPreferenceClickListener(preference -> {
-            openScreen(R.xml.preferences_gpodder, activity);
-            return true;
-        });
-    }
-
-    private void setupFlattrScreen() {
-        final AppCompatActivity activity = ui.getActivity();
-
-        ui.findPreference(PreferenceController.PREF_FLATTR_REVOKE).setOnPreferenceClickListener(
-                preference -> {
-                    FlattrUtils.revokeAccessToken(activity);
-                    checkFlattrItemVisibility();
-                    return true;
-                }
-        );
-
-        ui.findPreference(PreferenceController.PREF_AUTO_FLATTR_PREFS)
-                .setOnPreferenceClickListener(preference -> {
-                    AutoFlattrPreferenceDialog.newAutoFlattrPreferenceDialog(activity,
-                            new AutoFlattrPreferenceDialog.AutoFlattrPreferenceDialogInterface() {
-                                @Override
-                                public void onCancelled() {
-
-                                }
-
-                                @Override
-                                public void onConfirmed(boolean autoFlattrEnabled, float autoFlattrValue) {
-                                    UserPreferences.setAutoFlattrSettings(autoFlattrEnabled, autoFlattrValue);
-                                    checkFlattrItemVisibility();
-                                }
-                            });
-                    return true;
-                });
-    }
-
-    private void setupGpodderScreen() {
-        final AppCompatActivity activity = ui.getActivity();
-
-        ui.findPreference(PreferenceController.PREF_GPODNET_SETLOGIN_INFORMATION)
-                .setOnPreferenceClickListener(preference -> {
-                    AuthenticationDialog dialog = new AuthenticationDialog(activity,
-                            R.string.pref_gpodnet_setlogin_information_title, false, false, GpodnetPreferences.getUsername(),
-                            null) {
-
-                        @Override
-                        protected void onConfirmed(String username, String password, boolean saveUsernamePassword) {
-                            GpodnetPreferences.setPassword(password);
-                        }
-                    };
-                    dialog.show();
-                    return true;
-                });
-        ui.findPreference(PreferenceController.PREF_GPODNET_SYNC).
-                setOnPreferenceClickListener(preference -> {
-                    GpodnetSyncService.sendSyncIntent(ui.getActivity().getApplicationContext());
-                    Toast toast = Toast.makeText(ui.getActivity(), R.string.pref_gpodnet_sync_started,
-                            Toast.LENGTH_SHORT);
-                    toast.show();
-                    return true;
-                });
-        ui.findPreference(PreferenceController.PREF_GPODNET_FORCE_FULL_SYNC).
-                setOnPreferenceClickListener(preference -> {
-                    GpodnetPreferences.setLastSubscriptionSyncTimestamp(0L);
-                    GpodnetPreferences.setLastEpisodeActionsSyncTimestamp(0L);
-                    GpodnetPreferences.setLastSyncAttempt(false, 0);
-                    updateLastGpodnetSyncReport(false, 0);
-                    GpodnetSyncService.sendSyncIntent(ui.getActivity().getApplicationContext());
-                    Toast toast = Toast.makeText(ui.getActivity(), R.string.pref_gpodnet_sync_started,
-                            Toast.LENGTH_SHORT);
-                    toast.show();
-                    return true;
-                });
-        ui.findPreference(PreferenceController.PREF_GPODNET_LOGOUT).setOnPreferenceClickListener(
-                preference -> {
-                    GpodnetPreferences.logout();
-                    Toast toast = Toast.makeText(activity, R.string.pref_gpodnet_logout_toast, Toast.LENGTH_SHORT);
-                    toast.show();
-                    updateGpodnetPreferenceScreen();
-                    return true;
-                });
-        ui.findPreference(PreferenceController.PREF_GPODNET_HOSTNAME).setOnPreferenceClickListener(
-                preference -> {
-                    GpodnetSetHostnameDialog.createDialog(activity).setOnDismissListener(dialog -> updateGpodnetPreferenceScreen());
-                    return true;
-                });
-    }
-
-    private void setupPlaybackScreen() {
-        final Activity activity = ui.getActivity();
-
-        ui.findPreference(PreferenceController.PREF_PLAYBACK_SPEED_LAUNCHER)
-                .setOnPreferenceClickListener(preference -> {
-                    VariableSpeedDialog.showDialog(activity);
-                    return true;
-                });
-        ui.findPreference(PreferenceController.PREF_PLAYBACK_REWIND_DELTA_LAUNCHER)
-                .setOnPreferenceClickListener(preference -> {
-                    MediaplayerActivity.showSkipPreference(activity, MediaplayerActivity.SkipDirection.SKIP_REWIND);
-                    return true;
-                });
-        ui.findPreference(PreferenceController.PREF_PLAYBACK_FAST_FORWARD_DELTA_LAUNCHER)
-                .setOnPreferenceClickListener(preference -> {
-                    MediaplayerActivity.showSkipPreference(activity, MediaplayerActivity.SkipDirection.SKIP_FORWARD);
-                    return true;
-                });
-        if (!PictureInPictureUtil.supportsPictureInPicture(activity)) {
-            ListPreference behaviour = (ListPreference) ui.findPreference(UserPreferences.PREF_VIDEO_BEHAVIOR);
-            behaviour.setEntries(R.array.video_background_behavior_options_without_pip);
-            behaviour.setEntryValues(R.array.video_background_behavior_values_without_pip);
-        }
-    }
-
-    private void setupAutoDownloadScreen() {
-        ui.findPreference(UserPreferences.PREF_ENABLE_AUTODL).setOnPreferenceChangeListener(
-                (preference, newValue) -> {
-                    if (newValue instanceof Boolean) {
-                        checkAutodownloadItemVisibility((Boolean) newValue);
-                    }
-                    return true;
-                });
-        ui.findPreference(UserPreferences.PREF_ENABLE_AUTODL_WIFI_FILTER)
-                .setOnPreferenceChangeListener(
-                        (preference, newValue) -> {
-                            if (newValue instanceof Boolean) {
-                                setSelectedNetworksEnabled((Boolean) newValue);
-                                return true;
-                            } else {
-                                return false;
-                            }
-                        }
-                );
-        ui.findPreference(UserPreferences.PREF_EPISODE_CACHE_SIZE)
-                .setOnPreferenceChangeListener(
-                        (preference, o) -> {
-                            if (o instanceof String) {
-                                setEpisodeCacheSizeText(UserPreferences.readEpisodeCacheSize((String) o));
-                            }
-                            return true;
-                        }
-                );
-    }
-
-    private void setupNetworkScreen() {
-        final AppCompatActivity activity = ui.getActivity();
-        ui.findPreference(PREF_SCREEN_AUTODL).setOnPreferenceClickListener(preference -> {
-            openScreen(R.xml.preferences_autodownload, activity);
-            return true;
-        });
-        ui.findPreference(UserPreferences.PREF_UPDATE_INTERVAL)
-                .setOnPreferenceClickListener(preference -> {
-                    showUpdateIntervalTimePreferencesDialog();
-                    return true;
-                });
-        ui.findPreference(UserPreferences.PREF_PARALLEL_DOWNLOADS)
-                .setOnPreferenceChangeListener(
-                        (preference, o) -> {
-                            if (o instanceof Integer) {
-                                setParallelDownloadsText((Integer) o);
-                            }
-                            return true;
-                        }
-                );
-        // validate and set correct value: number of downloads between 1 and 50 (inclusive)
-        ui.findPreference(PREF_PROXY).setOnPreferenceClickListener(preference -> {
-            ProxyDialog dialog = new ProxyDialog(ui.getActivity());
-            dialog.createDialog().show();
-            return true;
-        });
-    }
-
-    private void setupMainScreen() {
-        final AppCompatActivity activity = ui.getActivity();
-        setupSearch();
-        ui.findPreference(PREF_SCREEN_USER_INTERFACE).setOnPreferenceClickListener(preference -> {
-            openScreen(R.xml.preferences_user_interface, activity);
-            return true;
-        });
-        ui.findPreference(PREF_SCREEN_PLAYBACK).setOnPreferenceClickListener(preference -> {
-            openScreen(R.xml.preferences_playback, activity);
-            return true;
-        });
-        ui.findPreference(PREF_SCREEN_NETWORK).setOnPreferenceClickListener(preference -> {
-            openScreen(R.xml.preferences_network, activity);
-            return true;
-        });
-        ui.findPreference(PREF_SCREEN_INTEGRATIONS).setOnPreferenceClickListener(preference -> {
-            openScreen(R.xml.preferences_integrations, activity);
-            return true;
-        });
-        ui.findPreference(PREF_SCREEN_STORAGE).setOnPreferenceClickListener(preference -> {
-            openScreen(R.xml.preferences_storage, activity);
-            return true;
-        });
-
-        ui.findPreference(PreferenceController.PREF_ABOUT).setOnPreferenceClickListener(
-                preference -> {
-                    activity.startActivity(new Intent(activity, AboutActivity.class));
-                    return true;
-                }
-        );
-        ui.findPreference(PreferenceController.STATISTICS).setOnPreferenceClickListener(
-                preference -> {
-                    activity.startActivity(new Intent(activity, StatisticsActivity.class));
-                    return true;
-                }
-        );
-        ui.findPreference(PREF_KNOWN_ISSUES).setOnPreferenceClickListener(preference -> {
-            openInBrowser("https://github.com/AntennaPod/AntennaPod/labels/bug");
-            return true;
-        });
-        ui.findPreference(PREF_FAQ).setOnPreferenceClickListener(preference -> {
-            openInBrowser("http://antennapod.org/faq.html");
-            return true;
-        });
-        ui.findPreference(PREF_SEND_CRASH_REPORT).setOnPreferenceClickListener(preference -> {
-            Context context = ui.getActivity().getApplicationContext();
-            Intent emailIntent = new Intent(Intent.ACTION_SEND);
-            emailIntent.setType("text/plain");
-            emailIntent.putExtra(Intent.EXTRA_EMAIL, new String[]{"Martin.Fietz@gmail.com"});
-            emailIntent.putExtra(Intent.EXTRA_SUBJECT, "AntennaPod Crash Report");
-            emailIntent.putExtra(Intent.EXTRA_TEXT, "Please describe what you were doing when the app crashed");
-            // the attachment
-            Uri fileUri = FileProvider.getUriForFile(context, context.getString(R.string.provider_authority),
-                    CrashReportWriter.getFile());
-            emailIntent.putExtra(Intent.EXTRA_STREAM, fileUri);
-            emailIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-            String intentTitle = ui.getActivity().getString(R.string.send_email);
-            if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
-                List<ResolveInfo> resInfoList = context.getPackageManager().queryIntentActivities(emailIntent, PackageManager.MATCH_DEFAULT_ONLY);
-                for (ResolveInfo resolveInfo : resInfoList) {
-                    String packageName = resolveInfo.activityInfo.packageName;
-                    context.grantUriPermission(packageName, fileUri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
-                }
-            }
-            ui.getActivity().startActivity(Intent.createChooser(emailIntent, intentTitle));
-            return true;
-        });
-    }
-
-    private void setupSearch() {
-        final AppCompatActivity activity = ui.getActivity();
-
-        SearchPreference searchPreference = (SearchPreference) ui.findPreference("searchPreference");
-        SearchConfiguration config = searchPreference.getSearchConfiguration();
-        config.setActivity(activity);
-        config.setFragmentContainerViewId(R.id.content);
-        config.setBreadcrumbsEnabled(true);
-
-        config.index()
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_user_interface))
-                .addFile(R.xml.preferences_user_interface);
-        config.index()
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_playback))
-                .addFile(R.xml.preferences_playback);
-        config.index()
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_network))
-                .addFile(R.xml.preferences_network);
-        config.index()
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_storage))
-                .addFile(R.xml.preferences_storage);
-        config.index()
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_network))
-                .addBreadcrumb(R.string.automation)
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_autodownload))
-                .addFile(R.xml.preferences_autodownload);
-        config.index()
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_integrations))
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_gpodder))
-                .addFile(R.xml.preferences_gpodder);
-        config.index()
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_integrations))
-                .addBreadcrumb(getTitleOfPage(R.xml.preferences_flattr))
-                .addFile(R.xml.preferences_flattr);
-    }
-
-    public PreferenceFragmentCompat openScreen(int preferences, AppCompatActivity activity) {
-        PreferenceFragmentCompat prefFragment = new PreferenceActivity.MainFragment();
-        Bundle args = new Bundle();
-        args.putInt(PARAM_RESOURCE, preferences);
-        prefFragment.setArguments(args);
-        activity.getSupportFragmentManager().beginTransaction()
-                .replace(R.id.content, prefFragment)
-                .addToBackStack(TAG).commit();
-        return prefFragment;
-    }
-
-    public static int getTitleOfPage(int preferences) {
-        switch (preferences) {
-            case R.xml.preferences_network:
-                return R.string.network_pref;
-            case R.xml.preferences_autodownload:
-                return R.string.pref_automatic_download_title;
-            case R.xml.preferences_playback:
-                return R.string.playback_pref;
-            case R.xml.preferences_storage:
-                return R.string.storage_pref;
-            case R.xml.preferences_user_interface:
-                return R.string.user_interface_label;
-            case R.xml.preferences_integrations:
-                return R.string.integrations_label;
-            case R.xml.preferences_flattr:
-                return R.string.flattr_label;
-            case R.xml.preferences_gpodder:
-                return R.string.gpodnet_main_label;
-            default:
-                return R.string.settings_label;
-        }
-    }
-
-    private boolean export(ExportWriter exportWriter) {
-        Context context = ui.getActivity();
-        final ProgressDialog progressDialog = new ProgressDialog(context);
-        progressDialog.setMessage(context.getString(R.string.exporting_label));
-        progressDialog.setIndeterminate(true);
-        progressDialog.show();
-        final AlertDialog.Builder alert = new AlertDialog.Builder(context)
-                .setNeutralButton(android.R.string.ok, (dialog, which) -> dialog.dismiss());
-        Observable<File> observable = new ExportWorker(exportWriter).exportObservable();
-        disposable = observable.subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(output -> {
-                    alert.setTitle(R.string.export_success_title);
-                    String message = context.getString(R.string.export_success_sum, output.toString());
-                    alert.setMessage(message);
-                    alert.setPositiveButton(R.string.send_label, (dialog, which) -> {
-                        Uri fileUri = FileProvider.getUriForFile(context.getApplicationContext(),
-                                "de.danoeh.antennapod.provider", output);
-                        Intent sendIntent = new Intent(Intent.ACTION_SEND);
-                        sendIntent.putExtra(Intent.EXTRA_SUBJECT,
-                                context.getResources().getText(R.string.opml_export_label));
-                        sendIntent.putExtra(Intent.EXTRA_STREAM, fileUri);
-                        sendIntent.setType("text/plain");
-                        sendIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-                        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
-                            List<ResolveInfo> resInfoList = context.getPackageManager().queryIntentActivities(sendIntent, PackageManager.MATCH_DEFAULT_ONLY);
-                            for (ResolveInfo resolveInfo : resInfoList) {
-                                String packageName = resolveInfo.activityInfo.packageName;
-                                context.grantUriPermission(packageName, fileUri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
-                            }
-                        }
-                        context.startActivity(Intent.createChooser(sendIntent,
-                                context.getResources().getText(R.string.send_label)));
-                    });
-                    alert.create().show();
-                }, error -> {
-                    alert.setTitle(R.string.export_error_label);
-                    alert.setMessage(error.getMessage());
-                    alert.show();
-                }, progressDialog::dismiss);
-        return true;
-    }
-
-    private void openInBrowser(String url) {
-        try {
-            Intent myIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
-            ui.getActivity().startActivity(myIntent);
-        } catch (ActivityNotFoundException e) {
-            Toast.makeText(ui.getActivity(), R.string.pref_no_browser_found, Toast.LENGTH_LONG).show();
-            Log.e(TAG, Log.getStackTraceString(e));
-        }
-    }
-
-    public void onResume(int screen) {
-        switch (screen) {
-            case R.xml.preferences_network:
-                setUpdateIntervalText();
-                setParallelDownloadsText(UserPreferences.getParallelDownloads());
-                break;
-            case R.xml.preferences_autodownload:
-                setEpisodeCacheSizeText(UserPreferences.getEpisodeCacheSize());
-                checkAutodownloadItemVisibility(UserPreferences.isEnableAutodownload());
-                break;
-            case R.xml.preferences_storage:
-                setDataFolderText();
-                break;
-            case R.xml.preferences_integrations:
-                setIntegrationsItemVisibility();
-                return;
-            case R.xml.preferences_flattr:
-                checkFlattrItemVisibility();
-                break;
-            case R.xml.preferences_gpodder:
-                GpodnetPreferences.registerOnSharedPreferenceChangeListener(gpoddernetListener);
-                updateGpodnetPreferenceScreen();
-                break;
-            case R.xml.preferences_playback:
-                checkSonicItemVisibility();
-                break;
-        }
-    }
-
-    public void unregisterGpodnet() {
-        GpodnetPreferences.unregisterOnSharedPreferenceChangeListener(gpoddernetListener);
-    }
-
-    public void unsubscribeExportSubscription() {
-        if (disposable != null) {
-            disposable.dispose();
-        }
-    }
-
-    @SuppressLint("NewApi")
-    public void onActivityResult(int requestCode, int resultCode, Intent data) {
-        if (resultCode == Activity.RESULT_OK &&
-                requestCode == DirectoryChooserActivity.RESULT_CODE_DIR_SELECTED) {
-            String dir = data.getStringExtra(DirectoryChooserActivity.RESULT_SELECTED_DIR);
-
-            File path;
-            if(dir != null) {
-                path = new File(dir);
-            } else {
-                path = ui.getActivity().getExternalFilesDir(null);
-            }
-            String message = null;
-            final Context context= ui.getActivity().getApplicationContext();
-            if(!path.exists()) {
-                message = String.format(context.getString(R.string.folder_does_not_exist_error), dir);
-            } else if(!path.canRead()) {
-                message = String.format(context.getString(R.string.folder_not_readable_error), dir);
-            } else if(!path.canWrite()) {
-                message = String.format(context.getString(R.string.folder_not_writable_error), dir);
-            }
-
-            if(message == null) {
-                Log.d(TAG, "Setting data folder: " + dir);
-                UserPreferences.setDataFolder(dir);
-                setDataFolderText();
-            } else {
-                AlertDialog.Builder ab = new AlertDialog.Builder(ui.getActivity());
-                ab.setMessage(message);
-                ab.setPositiveButton(android.R.string.ok, null);
-                ab.show();
-            }
-        }
-    }
-
-
-    private void updateGpodnetPreferenceScreen() {
-        final boolean loggedIn = GpodnetPreferences.loggedIn();
-        ui.findPreference(PreferenceController.PREF_GPODNET_LOGIN).setEnabled(!loggedIn);
-        ui.findPreference(PreferenceController.PREF_GPODNET_SETLOGIN_INFORMATION).setEnabled(loggedIn);
-        ui.findPreference(PreferenceController.PREF_GPODNET_SYNC).setEnabled(loggedIn);
-        ui.findPreference(PreferenceController.PREF_GPODNET_FORCE_FULL_SYNC).setEnabled(loggedIn);
-        ui.findPreference(PreferenceController.PREF_GPODNET_LOGOUT).setEnabled(loggedIn);
-        ui.findPreference(PREF_GPODNET_NOTIFICATIONS).setEnabled(loggedIn);
-        if(loggedIn) {
-            String format = ui.getActivity().getString(R.string.pref_gpodnet_login_status);
-            String summary = String.format(format, GpodnetPreferences.getUsername(),
-                    GpodnetPreferences.getDeviceID());
-            ui.findPreference(PreferenceController.PREF_GPODNET_LOGOUT).setSummary(Html.fromHtml(summary));
-            updateLastGpodnetSyncReport(GpodnetPreferences.getLastSyncAttemptResult(),
-                    GpodnetPreferences.getLastSyncAttemptTimestamp());
-        } else {
-            ui.findPreference(PreferenceController.PREF_GPODNET_LOGOUT).setSummary(null);
-            updateLastGpodnetSyncReport(false, 0);
-        }
-        ui.findPreference(PreferenceController.PREF_GPODNET_HOSTNAME).setSummary(GpodnetPreferences.getHostname());
-    }
-
-    private void updateLastGpodnetSyncReport(boolean successful, long lastTime) {
-        Preference sync = ui.findPreference(PREF_GPODNET_SYNC);
-        if (lastTime != 0) {
-            sync.setSummary(ui.getActivity().getString(R.string.pref_gpodnet_sync_changes_sum) + "\n" +
-                    ui.getActivity().getString(R.string.pref_gpodnet_sync_sum_last_sync_line,
-                            ui.getActivity().getString(successful ?
-                                    R.string.gpodnetsync_pref_report_successful :
-                                    R.string.gpodnetsync_pref_report_failed),
-                            DateUtils.getRelativeDateTimeString(ui.getActivity(),
-                                    lastTime,
-                                    DateUtils.MINUTE_IN_MILLIS,
-                                    DateUtils.WEEK_IN_MILLIS,
-                                    DateUtils.FORMAT_SHOW_TIME)));
-        } else {
-            sync.setSummary(ui.getActivity().getString(R.string.pref_gpodnet_sync_changes_sum));
-        }
-    }
-
-    private String[] getUpdateIntervalEntries(final String[] values) {
-        final Resources res = ui.getActivity().getResources();
-        String[] entries = new String[values.length];
-        for (int x = 0; x < values.length; x++) {
-            Integer v = Integer.parseInt(values[x]);
-            switch (v) {
-                case 0:
-                    entries[x] = res.getString(R.string.pref_update_interval_hours_manual);
-                    break;
-                case 1:
-                    entries[x] = v + " " + res.getString(R.string.pref_update_interval_hours_singular);
-                    break;
-                default:
-                    entries[x] = v + " " + res.getString(R.string.pref_update_interval_hours_plural);
-                    break;
-
-            }
-        }
-        return entries;
-    }
-
-    private void buildEpisodeCleanupPreference() {
-        final Resources res = ui.getActivity().getResources();
-
-        ListPreference pref = (ListPreference) ui.findPreference(UserPreferences.PREF_EPISODE_CLEANUP);
-        String[] values = res.getStringArray(
-                R.array.episode_cleanup_values);
-        String[] entries = new String[values.length];
-        for (int x = 0; x < values.length; x++) {
-            int v = Integer.parseInt(values[x]);
-            if (v == UserPreferences.EPISODE_CLEANUP_QUEUE) {
-                entries[x] = res.getString(R.string.episode_cleanup_queue_removal);
-            } else if (v == UserPreferences.EPISODE_CLEANUP_NULL){
-                entries[x] = res.getString(R.string.episode_cleanup_never);
-            } else if (v == 0) {
-                entries[x] = res.getString(R.string.episode_cleanup_after_listening);
-            } else {
-                entries[x] = res.getQuantityString(R.plurals.episode_cleanup_days_after_listening, v, v);
-            }
-        }
-        pref.setEntries(entries);
-    }
-
-    private void buildSmartMarkAsPlayedPreference() {
-        final Resources res = ui.getActivity().getResources();
-
-        ListPreference pref = (ListPreference) ui.findPreference(UserPreferences.PREF_SMART_MARK_AS_PLAYED_SECS);
-        String[] values = res.getStringArray(R.array.smart_mark_as_played_values);
-        String[] entries = new String[values.length];
-        for (int x = 0; x < values.length; x++) {
-            if(x == 0) {
-                entries[x] = res.getString(R.string.pref_smart_mark_as_played_disabled);
-            } else {
-                Integer v = Integer.parseInt(values[x]);
-                if(v < 60) {
-                    entries[x] = res.getQuantityString(R.plurals.time_seconds_quantified, v, v);
-                } else {
-                    v /= 60;
-                    entries[x] = res.getQuantityString(R.plurals.time_minutes_quantified, v, v);
-                }
-            }
-        }
-        pref.setEntries(entries);
-    }
-
-    private void setSelectedNetworksEnabled(boolean b) {
-        if (selectedNetworks != null) {
-            for (Preference p : selectedNetworks) {
-                p.setEnabled(b);
-            }
-        }
-    }
-
-    private void setIntegrationsItemVisibility() {
-        ui.findPreference(PreferenceController.PREF_SCREEN_FLATTR).setEnabled(FlattrUtils.hasAPICredentials());
-    }
-
-    @SuppressWarnings("deprecation")
-    private void checkFlattrItemVisibility() {
-        boolean hasFlattrToken = FlattrUtils.hasToken();
-        ui.findPreference(PreferenceController.PREF_FLATTR_AUTH).setEnabled(!hasFlattrToken);
-        ui.findPreference(PreferenceController.PREF_FLATTR_REVOKE).setEnabled(hasFlattrToken);
-        ui.findPreference(PreferenceController.PREF_AUTO_FLATTR_PREFS).setEnabled(hasFlattrToken);
-    }
-
-    private void checkAutodownloadItemVisibility(boolean autoDownload) {
-        ui.findPreference(UserPreferences.PREF_EPISODE_CACHE_SIZE).setEnabled(autoDownload);
-        ui.findPreference(UserPreferences.PREF_ENABLE_AUTODL_ON_BATTERY).setEnabled(autoDownload);
-        ui.findPreference(UserPreferences.PREF_ENABLE_AUTODL_WIFI_FILTER).setEnabled(autoDownload);
-        ui.findPreference(UserPreferences.PREF_EPISODE_CLEANUP).setEnabled(autoDownload);
-        ui.findPreference(UserPreferences.PREF_ENABLE_AUTODL_ON_MOBILE).setEnabled(autoDownload);
-        setSelectedNetworksEnabled(autoDownload && UserPreferences.isEnableAutodownloadWifiFilter());
-    }
-
-    private void checkSonicItemVisibility() {
-        if (Build.VERSION.SDK_INT < 16) {
-            ListPreference p = (ListPreference) ui.findPreference(UserPreferences.PREF_MEDIA_PLAYER);
-            p.setEntries(R.array.media_player_options_no_sonic);
-            p.setEntryValues(R.array.media_player_values_no_sonic);
-        }
-    }
-
-    private void setUpdateIntervalText() {
-        Context context = ui.getActivity().getApplicationContext();
-        String val;
-        long interval = UserPreferences.getUpdateInterval();
-        if(interval > 0) {
-            int hours = (int) TimeUnit.MILLISECONDS.toHours(interval);
-            String hoursStr = context.getResources().getQuantityString(R.plurals.time_hours_quantified, hours, hours);
-            val = String.format(context.getString(R.string.pref_autoUpdateIntervallOrTime_every), hoursStr);
-        } else {
-            int[] timeOfDay = UserPreferences.getUpdateTimeOfDay();
-            if(timeOfDay.length == 2) {
-                Calendar cal = new GregorianCalendar();
-                cal.set(Calendar.HOUR_OF_DAY, timeOfDay[0]);
-                cal.set(Calendar.MINUTE, timeOfDay[1]);
-                String timeOfDayStr = DateFormat.getTimeFormat(context).format(cal.getTime());
-                val = String.format(context.getString(R.string.pref_autoUpdateIntervallOrTime_at),
-                        timeOfDayStr);
-            } else {
-                val = context.getString(R.string.pref_smart_mark_as_played_disabled);  // TODO: Is this a bug? Otherwise document why is this related to smart mark???
-            }
-        }
-        String summary = context.getString(R.string.pref_autoUpdateIntervallOrTime_sum) + "\n"
-                + String.format(context.getString(R.string.pref_current_value), val);
-        ui.findPreference(UserPreferences.PREF_UPDATE_INTERVAL).setSummary(summary);
-    }
-
-    private void setParallelDownloadsText(int downloads) {
-        final Resources res = ui.getActivity().getResources();
-
-        String s = Integer.toString(downloads)
-                    + res.getString(R.string.parallel_downloads_suffix);
-        ui.findPreference(UserPreferences.PREF_PARALLEL_DOWNLOADS).setSummary(s);
-    }
-
-    private void setEpisodeCacheSizeText(int cacheSize) {
-        final Resources res = ui.getActivity().getResources();
-
-        String s;
-        if (cacheSize == res.getInteger(
-                R.integer.episode_cache_size_unlimited)) {
-            s = res.getString(R.string.pref_episode_cache_unlimited);
-        } else {
-            s = Integer.toString(cacheSize)
-                    + res.getString(R.string.episodes_suffix);
-        }
-        ui.findPreference(UserPreferences.PREF_EPISODE_CACHE_SIZE).setSummary(s);
-    }
-
-    private void setDataFolderText() {
-        File f = UserPreferences.getDataFolder(null);
-        if (f != null) {
-            ui.findPreference(PreferenceController.PREF_CHOOSE_DATA_DIR)
-                    .setSummary(f.getAbsolutePath());
-        }
-    }
-
-    private static String blankIfNull(String val) {
-        return val == null ? "" : val;
-    }
-
-    private void buildAutodownloadSelectedNetworksPreference() {
-        final Activity activity = ui.getActivity();
-
-        if (selectedNetworks != null) {
-            clearAutodownloadSelectedNetworsPreference();
-        }
-        // get configured networks
-        WifiManager wifiservice = (WifiManager) activity.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
-        List<WifiConfiguration> networks = wifiservice.getConfiguredNetworks();
-
-        if (networks == null) {
-            Log.e(TAG, "Couldn't get list of configure Wi-Fi networks");
-            return;
-        }
-        Collections.sort(networks, (x, y) ->
-                blankIfNull(x.SSID).compareTo(blankIfNull(y.SSID)));
-        selectedNetworks = new CheckBoxPreference[networks.size()];
-        List<String> prefValues = Arrays.asList(UserPreferences
-                .getAutodownloadSelectedNetworks());
-        PreferenceScreen prefScreen = ui.getPreferenceScreen();
-        Preference.OnPreferenceClickListener clickListener = preference -> {
-            if (preference instanceof CheckBoxPreference) {
-                String key = preference.getKey();
-                List<String> prefValuesList = new ArrayList<>(
-                        Arrays.asList(UserPreferences
-                                .getAutodownloadSelectedNetworks())
-                );
-                boolean newValue = ((CheckBoxPreference) preference)
-                        .isChecked();
-                Log.d(TAG, "Selected network " + key + ". New state: " + newValue);
-
-                int index = prefValuesList.indexOf(key);
-                if (index >= 0 && !newValue) {
-                    // remove network
-                    prefValuesList.remove(index);
-                } else if (index < 0 && newValue) {
-                    prefValuesList.add(key);
-                }
-
-                UserPreferences.setAutodownloadSelectedNetworks(
-                        prefValuesList.toArray(new String[prefValuesList.size()])
-                );
-                return true;
-            } else {
-                return false;
-            }
-        };
-        // create preference for each known network. attach listener and set
-        // value
-        for (int i = 0; i < networks.size(); i++) {
-            WifiConfiguration config = networks.get(i);
-
-            CheckBoxPreference pref = new CheckBoxPreference(activity);
-            String key = Integer.toString(config.networkId);
-            pref.setTitle(config.SSID);
-            pref.setKey(key);
-            pref.setOnPreferenceClickListener(clickListener);
-            pref.setPersistent(false);
-            pref.setChecked(prefValues.contains(key));
-            selectedNetworks[i] = pref;
-            prefScreen.addPreference(pref);
-        }
-    }
-
-    private void clearAutodownloadSelectedNetworsPreference() {
-        if (selectedNetworks != null) {
-            PreferenceScreen prefScreen = ui.getPreferenceScreen();
-
-            for (CheckBoxPreference network : selectedNetworks) {
-                if (network != null) {
-                    prefScreen.removePreference(network);
-                }
-            }
-        }
-    }
-
-    private void showDrawerPreferencesDialog() {
-        final Context context = ui.getActivity();
-        final List<String> hiddenDrawerItems = UserPreferences.getHiddenDrawerItems();
-        final String[] navTitles = context.getResources().getStringArray(R.array.nav_drawer_titles);
-        final String[] NAV_DRAWER_TAGS = MainActivity.NAV_DRAWER_TAGS;
-        boolean[] checked = new boolean[MainActivity.NAV_DRAWER_TAGS.length];
-        for(int i=0; i < NAV_DRAWER_TAGS.length; i++) {
-            String tag = NAV_DRAWER_TAGS[i];
-            if(!hiddenDrawerItems.contains(tag)) {
-                checked[i] = true;
-            }
-        }
-        AlertDialog.Builder builder = new AlertDialog.Builder(context);
-        builder.setTitle(R.string.drawer_preferences);
-        builder.setMultiChoiceItems(navTitles, checked, (dialog, which, isChecked) -> {
-            if (isChecked) {
-                hiddenDrawerItems.remove(NAV_DRAWER_TAGS[which]);
-            } else {
-                hiddenDrawerItems.add(NAV_DRAWER_TAGS[which]);
-            }
-        });
-        builder.setPositiveButton(R.string.confirm_label, (dialog, which) ->
-            UserPreferences.setHiddenDrawerItems(hiddenDrawerItems));
-        builder.setNegativeButton(R.string.cancel_label, null);
-        builder.create().show();
-    }
-
-    private void showNotificationButtonsDialog() {
-        final Context context = ui.getActivity();
-        final List<Integer> preferredButtons = UserPreferences.getCompactNotificationButtons();
-        final String[] allButtonNames = context.getResources().getStringArray(
-                R.array.compact_notification_buttons_options);
-        boolean[] checked = new boolean[allButtonNames.length]; // booleans default to false in java
-
-        for(int i=0; i < checked.length; i++) {
-            if(preferredButtons.contains(i)) {
-                checked[i] = true;
-            }
-        }
-
-        AlertDialog.Builder builder = new AlertDialog.Builder(context);
-        builder.setTitle(String.format(context.getResources().getString(
-                R.string.pref_compact_notification_buttons_dialog_title), 2));
-        builder.setMultiChoiceItems(allButtonNames, checked, (dialog, which, isChecked) -> {
-            checked[which] = isChecked;
-
-            if (isChecked) {
-                if (preferredButtons.size() < 2) {
-                    preferredButtons.add(which);
-                } else {
-                    // Only allow a maximum of two selections. This is because the notification
-                    // on the lock screen can only display 3 buttons, and the play/pause button
-                    // is always included.
-                    checked[which] = false;
-                    ListView selectionView = ((AlertDialog) dialog).getListView();
-                    selectionView.setItemChecked(which, false);
-                    Snackbar.make(
-                            selectionView,
-                            String.format(context.getResources().getString(
-                                    R.string.pref_compact_notification_buttons_dialog_error), 2),
-                            Snackbar.LENGTH_SHORT).show();
-                }
-            } else {
-                preferredButtons.remove((Integer) which);
-            }
-        });
-        builder.setPositiveButton(R.string.confirm_label, (dialog, which) ->
-            UserPreferences.setCompactNotificationButtons(preferredButtons));
-        builder.setNegativeButton(R.string.cancel_label, null);
-        builder.create().show();
-    }
-
-    // CHOOSE DATA FOLDER
-
-    private void requestPermission() {
-        ActivityCompat.requestPermissions(ui.getActivity(), EXTERNAL_STORAGE_PERMISSIONS,
-                PERMISSION_REQUEST_EXTERNAL_STORAGE);
-    }
-
-    private void openDirectoryChooser() {
-        Activity activity = ui.getActivity();
-        Intent intent = new Intent(activity, DirectoryChooserActivity.class);
-        activity.startActivityForResult(intent, DirectoryChooserActivity.RESULT_CODE_DIR_SELECTED);
-    }
-
-    private void showChooseDataFolderDialog() {
-        ChooseDataFolderDialog.showDialog(
-                ui.getActivity(), new ChooseDataFolderDialog.RunnableWithString() {
-                    @Override
-                    public void run(final String folder) {
-                        UserPreferences.setDataFolder(folder);
-                        setDataFolderText();
-                    }
-                });
-    }
-
-    // UPDATE TIME/INTERVAL DIALOG
-
-    private void showUpdateIntervalTimePreferencesDialog() {
-        final Context context = ui.getActivity();
-
-        MaterialDialog.Builder builder = new MaterialDialog.Builder(context);
-        builder.title(R.string.pref_autoUpdateIntervallOrTime_title);
-        builder.content(R.string.pref_autoUpdateIntervallOrTime_message);
-        builder.positiveText(R.string.pref_autoUpdateIntervallOrTime_Interval);
-        builder.negativeText(R.string.pref_autoUpdateIntervallOrTime_TimeOfDay);
-        builder.neutralText(R.string.pref_autoUpdateIntervallOrTime_Disable);
-        builder.onPositive((dialog, which) -> {
-            AlertDialog.Builder builder1 = new AlertDialog.Builder(context);
-            builder1.setTitle(context.getString(R.string.pref_autoUpdateIntervallOrTime_Interval));
-            final String[] values = context.getResources().getStringArray(R.array.update_intervall_values);
-            final String[] entries = getUpdateIntervalEntries(values);
-            long currInterval = UserPreferences.getUpdateInterval();
-            int checkedItem = -1;
-            if(currInterval > 0) {
-                String currIntervalStr = String.valueOf(TimeUnit.MILLISECONDS.toHours(currInterval));
-                checkedItem = ArrayUtils.indexOf(values, currIntervalStr);
-            }
-            builder1.setSingleChoiceItems(entries, checkedItem, (dialog1, which1) -> {
-                int hours = Integer.parseInt(values[which1]);
-                UserPreferences.setUpdateInterval(hours);
-                dialog1.dismiss();
-                setUpdateIntervalText();
-            });
-            builder1.setNegativeButton(context.getString(R.string.cancel_label), null);
-            builder1.show();
-        });
-        builder.onNegative((dialog, which) -> {
-            int hourOfDay = 7, minute = 0;
-            int[] updateTime = UserPreferences.getUpdateTimeOfDay();
-            if (updateTime.length == 2) {
-                hourOfDay = updateTime[0];
-                minute = updateTime[1];
-            }
-            TimePickerDialog timePickerDialog = new TimePickerDialog(context,
-                    (view, selectedHourOfDay, selectedMinute) -> {
-                        if (view.getTag() == null) { // onTimeSet() may get called twice!
-                            view.setTag("TAGGED");
-                            UserPreferences.setUpdateTimeOfDay(selectedHourOfDay, selectedMinute);
-                            setUpdateIntervalText();
-                        }
-                    }, hourOfDay, minute, DateFormat.is24HourFormat(context));
-            timePickerDialog.setTitle(context.getString(R.string.pref_autoUpdateIntervallOrTime_TimeOfDay));
-            timePickerDialog.show();
-        });
-        builder.onNeutral((dialog, which) -> {
-            UserPreferences.setUpdateInterval(0);
-            setUpdateIntervalText();
-        });
-        builder.show();
-    }
-
-
-    public interface PreferenceUI {
-
-        void setFragment(PreferenceFragmentCompat fragment);
-        PreferenceFragmentCompat getFragment();
-
-        /**
-         * Finds a preference based on its key.
-         */
-        Preference findPreference(CharSequence key);
-
-        PreferenceScreen getPreferenceScreen();
-
-        AppCompatActivity getActivity();
-    }
-}
diff --git a/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceUpgrader.java b/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceUpgrader.java
new file mode 100644
index 000000000..e56703598
--- /dev/null
+++ b/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceUpgrader.java
@@ -0,0 +1,69 @@
+package de.danoeh.antennapod.preferences;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+import de.danoeh.antennapod.BuildConfig;
+import de.danoeh.antennapod.core.preferences.UserPreferences;
+import de.danoeh.antennapod.core.util.gui.NotificationUtils;
+
+public class PreferenceUpgrader {
+    private static final String PREF_CONFIGURED_VERSION = "configuredVersion";
+    private static final String PREF_NAME = "PreferenceUpgrader";
+
+    private static SharedPreferences prefs;
+
+    public static void checkUpgrades(Context context) {
+        prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        SharedPreferences upgraderPrefs = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
+        int oldVersion = upgraderPrefs.getInt(PREF_CONFIGURED_VERSION, 1070200);
+        int newVersion = BuildConfig.VERSION_CODE;
+
+        if (oldVersion != newVersion) {
+            NotificationUtils.createChannels(context);
+
+            upgraderPrefs.edit().putInt(PREF_CONFIGURED_VERSION, newVersion).apply();
+            upgrade(oldVersion);
+        }
+    }
+
+    private static void upgrade(int oldVersion) {
+        if (oldVersion < 1070196) {
+            // migrate episode cleanup value (unit changed from days to hours)
+            int oldValueInDays = UserPreferences.getEpisodeCleanupValue();
+            if (oldValueInDays > 0) {
+                UserPreferences.setEpisodeCleanupValue(oldValueInDays * 24);
+            } // else 0 or special negative values, no change needed
+        }
+        if (oldVersion < 1070197) {
+            if (prefs.getBoolean("prefMobileUpdate", false)) {
+                prefs.edit().putString("prefMobileUpdateAllowed", "everything").apply();
+            }
+        }
+        if (oldVersion < 1070300) {
+            UserPreferences.restartUpdateAlarm();
+
+            if (UserPreferences.getMediaPlayer().equals("builtin")) {
+                prefs.edit().putString(UserPreferences.PREF_MEDIA_PLAYER,
+                        UserPreferences.PREF_MEDIA_PLAYER_EXOPLAYER).apply();
+            }
+
+            if (prefs.getBoolean("prefEnableAutoDownloadOnMobile", false)) {
+                UserPreferences.setAllowMobileAutoDownload(true);
+            }
+            switch (prefs.getString("prefMobileUpdateAllowed", "images")) {
+                case "everything":
+                    UserPreferences.setAllowMobileFeedRefresh(true);
+                    UserPreferences.setAllowMobileEpisodeDownload(true);
+                    UserPreferences.setAllowMobileImages(true);
+                    break;
+                case "images":
+                    UserPreferences.setAllowMobileImages(true);
+                    break;
+                case "nothing":
+                    UserPreferences.setAllowMobileImages(false);
+                    break;
+            }
+        }
+    }
+}