Rewrite preferences with a modified support library v7

app/build.gradle

@@ -94,8 +94,6 @@ dependencies {
     compile "com.android.support:design:$support_library_version"
     compile "com.android.support:recyclerview-v7:$support_library_version"
     compile "com.android.support:support-annotations:$support_library_version"
-    compile "com.android.support:preference-v7:$support_library_version"
-    compile "com.android.support:preference-v14:$support_library_version"
     compile "com.android.support:customtabs:$support_library_version"
 
     // ReactiveX
@@ -162,6 +160,7 @@ dependencies {
     compile 'com.nononsenseapps:filepicker:2.5.2'
     compile 'com.github.amulyakhare:TextDrawable:558677e'
     compile 'com.afollestad.material-dialogs:core:0.8.5.9'
+    compile 'net.xpece.android:support-preference:0.8.1'
 
     // Tests
     testCompile 'junit:junit:4.12'

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersFragment.kt

@@ -61,7 +61,7 @@ class ChaptersFragment : BaseRxFragment<ChaptersPresenter>(), ActionMode.Callbac
         return inflater.inflate(R.layout.fragment_manga_chapters, container, false)
     }
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    override fun onViewCreated(view: View, savedState: Bundle?) {
         // Init RecyclerView and adapter
         adapter = ChaptersAdapter(this)
 

app/src/main/java/eu/kanade/tachiyomi/ui/recent_updates/RecentChaptersFragment.kt

@@ -64,9 +64,9 @@ class RecentChaptersFragment
     /**
      * Called when view is created
      * @param view created view
-     * @param savedInstanceState status of saved sate
+     * @param savedState status of saved sate
      */
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    override fun onViewCreated(view: View, savedState: Bundle?) {
         // Init RecyclerView and adapter
         recycler.layoutManager = NpaLinearLayoutManager(activity)
         recycler.addItemDecoration(DividerItemDecoration(context.theme.getResourceDrawable(R.attr.divider_drawable)))

app/src/main/java/eu/kanade/tachiyomi/ui/recently_read/RecentlyReadFragment.kt

@@ -54,9 +54,9 @@ class RecentlyReadFragment : BaseRxFragment<RecentlyReadPresenter>() {
      * Called when view is created
      *
      * @param view created view
-     * @param savedInstanceState status of saved sate
+     * @param savedState status of saved sate
      */
-    override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
+    override fun onViewCreated(view: View?, savedState: Bundle?) {
         // Initialize adapter
         recycler.layoutManager = NpaLinearLayoutManager(activity)
         adapter = RecentlyReadAdapter(this)

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAboutFragment.kt

@@ -2,6 +2,7 @@ package eu.kanade.tachiyomi.ui.setting
 
 import android.os.Bundle
 import android.support.v7.preference.SwitchPreferenceCompat
+import android.support.v7.preference.XpPreferenceFragment
 import android.view.View
 import com.afollestad.materialdialogs.MaterialDialog
 import eu.kanade.tachiyomi.BuildConfig
@@ -17,7 +18,7 @@ import java.text.ParseException
 import java.text.SimpleDateFormat
 import java.util.*
 
-class SettingsAboutFragment : SettingsNestedFragment() {
+class SettingsAboutFragment : SettingsFragment() {
     /**
      * Checks for new releases
      */
@@ -33,15 +34,16 @@ class SettingsAboutFragment : SettingsNestedFragment() {
     }
 
     companion object {
-
+        fun newInstance(rootKey: String): SettingsAboutFragment {
-        fun newInstance(resourcePreference: Int, resourceTitle: Int): SettingsNestedFragment {
+            val args = Bundle()
-            val fragment = SettingsAboutFragment()
+            args.putString(XpPreferenceFragment.ARG_PREFERENCE_ROOT, rootKey)
-            fragment.setArgs(resourcePreference, resourceTitle)
+            return SettingsAboutFragment().apply { arguments = args }
-            return fragment
         }
     }
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    override fun onViewCreated(view: View, savedState: Bundle?) {
+        super.onViewCreated(view, savedState)
+
         val version = findPreference(getString(R.string.pref_version))
         val buildTime = findPreference(getString(R.string.pref_build_time))
 

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsActivity.kt

@@ -1,97 +1,63 @@
 package eu.kanade.tachiyomi.ui.setting
 
 import android.os.Bundle
-import android.support.v14.preference.PreferenceFragment
+import android.support.v7.preference.PreferenceFragmentCompat
+import android.support.v7.preference.PreferenceScreen
+import android.view.MenuItem
 import eu.kanade.tachiyomi.R
-import eu.kanade.tachiyomi.data.cache.ChapterCache
-import eu.kanade.tachiyomi.data.database.DatabaseHelper
-import eu.kanade.tachiyomi.data.mangasync.MangaSyncManager
-import eu.kanade.tachiyomi.data.network.NetworkHelper
-import eu.kanade.tachiyomi.data.preference.PreferencesHelper
-import eu.kanade.tachiyomi.data.source.SourceManager
 import eu.kanade.tachiyomi.ui.base.activity.BaseActivity
 import kotlinx.android.synthetic.main.toolbar.*
-import uy.kohesive.injekt.injectLazy
+import net.xpece.android.support.preference.PreferenceScreenNavigationStrategy
+import net.xpece.android.support.preference.PreferenceScreenNavigationStrategy.ReplaceFragment
 
-class SettingsActivity : BaseActivity() {
+class SettingsActivity : BaseActivity(),
+        PreferenceFragmentCompat.OnPreferenceStartScreenCallback,
+        PreferenceScreenNavigationStrategy.ReplaceFragment.Callbacks {
 
-    val preferences: PreferencesHelper by injectLazy()
+    private lateinit var replaceFragmentStrategy: ReplaceFragment
-    val chapterCache: ChapterCache by injectLazy()
-    val db: DatabaseHelper by injectLazy()
-    val sourceManager: SourceManager by injectLazy()
-    val syncManager: MangaSyncManager by injectLazy()
-    val networkHelper: NetworkHelper by injectLazy()
 
     override fun onCreate(savedState: Bundle?) {
         setAppTheme()
         super.onCreate(savedState)
         setContentView(R.layout.activity_preferences)
 
-        setupToolbar(toolbar)
+        replaceFragmentStrategy = ReplaceFragment(this,
+                R.anim.abc_fade_in, R.anim.abc_fade_out,
+                R.anim.abc_fade_in, R.anim.abc_fade_out)
 
         if (savedState == null) {
-            fragmentManager.beginTransaction()
+            supportFragmentManager.beginTransaction()
-                    .replace(R.id.settings_content, SettingsMainFragment())
+                .add(R.id.settings_content, SettingsFragment.newInstance(null), "Settings")
                 .commit()
         }
-    }
 
-    override fun onBackPressed() {
+        setupToolbar(toolbar, backNavigation = false)
-        if (!fragmentManager.popBackStackImmediate()) {
-            super.onBackPressed()
-        }
-    }
-
-    class SettingsMainFragment : PreferenceFragment() {
-
-        override fun onCreatePreferences(savedState: Bundle?, s: String?) {
-            addPreferencesFromResource(R.xml.pref_main)
-
-            registerSubpreference(R.string.pref_category_general_key) {
-                SettingsGeneralFragment.newInstance(R.xml.pref_general, R.string.pref_category_general)
-            }
-
-            registerSubpreference(R.string.pref_category_reader_key) {
-                SettingsNestedFragment.newInstance(R.xml.pref_reader, R.string.pref_category_reader)
-            }
-
-            registerSubpreference(R.string.pref_category_downloads_key) {
-                SettingsDownloadsFragment.newInstance(R.xml.pref_downloads, R.string.pref_category_downloads)
-            }
-
-            registerSubpreference(R.string.pref_category_sources_key) {
-                SettingsSourcesFragment.newInstance(R.xml.pref_sources, R.string.pref_category_sources)
-            }
-
-            registerSubpreference(R.string.pref_category_sync_key) {
-                SettingsSyncFragment.newInstance(R.xml.pref_sync, R.string.pref_category_sync)
-            }
-
-            registerSubpreference(R.string.pref_category_advanced_key) {
-                SettingsAdvancedFragment.newInstance(R.xml.pref_advanced, R.string.pref_category_advanced)
-            }
-
-            registerSubpreference(R.string.pref_category_about_key) {
-                SettingsAboutFragment.newInstance(R.xml.pref_about, R.string.pref_category_about)
-            }
-        }
-
-        override fun onResume() {
-            super.onResume()
-            (activity as BaseActivity).setToolbarTitle(getString(R.string.label_settings))
-        }
-
-        private fun registerSubpreference(preferenceResource: Int, func: () -> PreferenceFragment) {
-            findPreference(getString(preferenceResource)).setOnPreferenceClickListener {
-                val fragment = func()
-                fragmentManager.beginTransaction()
-                        .replace(R.id.settings_content, fragment)
-                        .addToBackStack(fragment.javaClass.simpleName)
-                        .commit()
-                true
-            }
-        }
 
     }
 
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        when (item.itemId) {
+            android.R.id.home -> onBackPressed()
+            else -> return super.onOptionsItemSelected(item)
+        }
+        return true
+    }
+
+    override fun onBuildPreferenceFragment(key: String?): PreferenceFragmentCompat {
+        return when (key) {
+            "general_screen" -> SettingsGeneralFragment.newInstance(key)
+            "downloads_screen" -> SettingsDownloadsFragment.newInstance(key)
+            "sources_screen" -> SettingsSourcesFragment.newInstance(key)
+            "sync_screen" -> SettingsSyncFragment.newInstance(key)
+            "advanced_screen" -> SettingsAdvancedFragment.newInstance(key)
+            "about_screen" -> SettingsAboutFragment.newInstance(key)
+            else -> SettingsFragment.newInstance(key)
+        }
+    }
+
+    override fun onPreferenceStartScreen(p0: PreferenceFragmentCompat, p1: PreferenceScreen): Boolean {
+        replaceFragmentStrategy.onPreferenceStartScreen(supportFragmentManager, p0, p1)
+        return true
+    }
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAdvancedFragment.kt

@@ -1,28 +1,36 @@
 package eu.kanade.tachiyomi.ui.setting
 
 import android.os.Bundle
+import android.support.v7.preference.XpPreferenceFragment
 import android.view.View
 import com.afollestad.materialdialogs.MaterialDialog
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.cache.ChapterCache
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
+import eu.kanade.tachiyomi.data.network.NetworkHelper
+import eu.kanade.tachiyomi.util.plusAssign
 import eu.kanade.tachiyomi.util.toast
 import rx.Observable
-import rx.Subscription
 import rx.android.schedulers.AndroidSchedulers
 import rx.schedulers.Schedulers
+import uy.kohesive.injekt.injectLazy
 import java.util.concurrent.atomic.AtomicInteger
 
-class SettingsAdvancedFragment : SettingsNestedFragment() {
+class SettingsAdvancedFragment : SettingsFragment() {
 
     companion object {
+        fun newInstance(rootKey: String): SettingsAdvancedFragment {
+            val args = Bundle()
+            args.putString(XpPreferenceFragment.ARG_PREFERENCE_ROOT, rootKey)
+            return SettingsAdvancedFragment().apply { arguments = args }
+        }
+    }
 
-        fun newInstance(resourcePreference: Int, resourceTitle: Int): SettingsNestedFragment {
+    private val network: NetworkHelper by injectLazy()
-            val fragment = SettingsAdvancedFragment()
+
-            fragment.setArgs(resourcePreference, resourceTitle)
+    private val chapterCache: ChapterCache by injectLazy()
-            return fragment
+
-        }
+    private val db: DatabaseHelper by injectLazy()
-    }
 
     private val clearCache by lazy { findPreference(getString(R.string.pref_clear_chapter_cache_key)) }
 
@@ -30,9 +38,9 @@ class SettingsAdvancedFragment : SettingsNestedFragment() {
 
     private val clearCookies by lazy { findPreference(getString(R.string.pref_clear_cookies_key)) }
 
-    private var clearCacheSubscription: Subscription? = null
+    override fun onViewCreated(view: View, savedState: Bundle?) {
+        super.onViewCreated(view, savedState)
 
-    override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
         clearCache.setOnPreferenceClickListener {
             clearChapterCache()
             true
@@ -40,7 +48,7 @@ class SettingsAdvancedFragment : SettingsNestedFragment() {
         clearCache.summary = getString(R.string.used_cache, chapterCache.readableSize)
 
         clearCookies.setOnPreferenceClickListener {
-            settingsActivity.networkHelper.cookies.removeAll()
+            network.cookies.removeAll()
             activity.toast(R.string.cookies_cleared)
             true
         }
@@ -51,11 +59,6 @@ class SettingsAdvancedFragment : SettingsNestedFragment() {
         }
     }
 
-    override fun onDestroyView() {
-        clearCacheSubscription?.unsubscribe()
-        super.onDestroyView()
-    }
-
     private fun clearChapterCache() {
         val deletedFiles = AtomicInteger()
 
@@ -67,9 +70,7 @@ class SettingsAdvancedFragment : SettingsNestedFragment() {
                 .cancelable(false)
                 .show()
 
-        clearCacheSubscription?.unsubscribe()
+        subscriptions += Observable.defer { Observable.from(files) }
-
-        clearCacheSubscription = Observable.defer { Observable.from(files) }
                 .concatMap { file ->
                     if (chapterCache.removeFileFromCache(file.name)) {
                         deletedFiles.incrementAndGet()
@@ -102,10 +103,4 @@ class SettingsAdvancedFragment : SettingsNestedFragment() {
                 .show()
     }
 
-    private val chapterCache: ChapterCache
-        get() = settingsActivity.chapterCache
-
-    private val db: DatabaseHelper
-        get() = settingsActivity.db
-
 }

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsDownloadsFragment.kt

@@ -5,6 +5,7 @@ import android.content.Intent
 import android.os.Bundle
 import android.os.Environment
 import android.support.v4.content.ContextCompat
+import android.support.v7.preference.XpPreferenceFragment
 import android.support.v7.widget.RecyclerView
 import android.view.View
 import android.view.ViewGroup
@@ -14,29 +15,32 @@ import com.nononsenseapps.filepicker.FilePickerActivity
 import com.nononsenseapps.filepicker.FilePickerFragment
 import com.nononsenseapps.filepicker.LogicHandler
 import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.util.inflate
-import rx.Subscription
+import eu.kanade.tachiyomi.util.plusAssign
+import uy.kohesive.injekt.injectLazy
 import java.io.File
 
-class SettingsDownloadsFragment : SettingsNestedFragment() {
+class SettingsDownloadsFragment : SettingsFragment() {
 
     companion object {
-
         val DOWNLOAD_DIR_CODE = 103
 
-        fun newInstance(resourcePreference: Int, resourceTitle: Int): SettingsNestedFragment {
+        fun newInstance(rootKey: String): SettingsDownloadsFragment {
-            val fragment = SettingsDownloadsFragment()
+            val args = Bundle()
-            fragment.setArgs(resourcePreference, resourceTitle)
+            args.putString(XpPreferenceFragment.ARG_PREFERENCE_ROOT, rootKey)
-            return fragment
+            return SettingsDownloadsFragment().apply { arguments = args }
         }
     }
 
+    private val preferences: PreferencesHelper by injectLazy()
+
     val downloadDirPref by lazy { findPreference(getString(R.string.pref_download_directory_key)) }
 
-    var downloadDirSubscription: Subscription? = null
-
     override fun onViewCreated(view: View, savedState: Bundle?) {
+        super.onViewCreated(view, savedState)
+
         downloadDirPref.setOnPreferenceClickListener {
 
             val currentDir = preferences.downloadsDirectory().getOrDefault()
@@ -66,15 +70,10 @@ class SettingsDownloadsFragment : SettingsNestedFragment() {
             true
         }
 
-        downloadDirSubscription = preferences.downloadsDirectory().asObservable()
+        subscriptions += preferences.downloadsDirectory().asObservable()
                 .subscribe { downloadDirPref.summary = it }
     }
 
-    override fun onDestroyView() {
-        downloadDirSubscription?.unsubscribe()
-        super.onDestroyView()
-    }
-
     fun getExternalFilesDirs(): List<File> {
         val defaultDir = Environment.getExternalStorageDirectory().absolutePath +
                 File.separator + getString(R.string.app_name) +

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsFragment.kt

@@ -0,0 +1,55 @@
+package eu.kanade.tachiyomi.ui.setting
+
+import android.os.Bundle
+import android.support.annotation.CallSuper
+import android.support.v7.preference.XpPreferenceFragment
+import android.view.View
+import eu.kanade.tachiyomi.R
+import net.xpece.android.support.preference.PreferenceScreenNavigationStrategy
+import rx.subscriptions.CompositeSubscription
+
+open class SettingsFragment : XpPreferenceFragment() {
+
+    companion object {
+        fun newInstance(rootKey: String?): SettingsFragment {
+            val args = Bundle()
+            args.putString(XpPreferenceFragment.ARG_PREFERENCE_ROOT, rootKey)
+            return SettingsFragment().apply { arguments = args }
+        }
+    }
+
+    lateinit var subscriptions: CompositeSubscription
+
+    override final fun onCreatePreferences2(savedState: Bundle?, rootKey: String?) {
+        subscriptions = CompositeSubscription()
+
+        addPreferencesFromResource(R.xml.pref_general)
+        addPreferencesFromResource(R.xml.pref_reader)
+        addPreferencesFromResource(R.xml.pref_downloads)
+        addPreferencesFromResource(R.xml.pref_sources)
+        addPreferencesFromResource(R.xml.pref_sync)
+        addPreferencesFromResource(R.xml.pref_advanced)
+        addPreferencesFromResource(R.xml.pref_about)
+
+        // Setup root preference title.
+        preferenceScreen.title = activity.title
+
+        PreferenceScreenNavigationStrategy.ReplaceFragment.onCreatePreferences(this, rootKey)
+    }
+
+    @CallSuper
+    override fun onViewCreated(view: View, savedState: Bundle?) {
+        listView.isFocusable = false
+    }
+
+    override fun onStart() {
+        super.onStart()
+        activity.title = preferenceScreen.title
+    }
+
+    override fun onDestroyView() {
+        subscriptions.unsubscribe()
+        super.onDestroyView()
+    }
+
+}

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsGeneralFragment.kt

@@ -2,29 +2,37 @@ package eu.kanade.tachiyomi.ui.setting
 
 import android.content.Intent
 import android.os.Bundle
-import android.support.v14.preference.MultiSelectListPreference
 import android.support.v4.app.TaskStackBuilder
 import android.support.v7.preference.Preference
+import android.support.v7.preference.PreferenceFragmentCompat
+import android.support.v7.preference.XpPreferenceFragment
 import android.view.View
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.library.LibraryUpdateAlarm
-import eu.kanade.tachiyomi.ui.main.MainActivity
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.util.plusAssign
 import eu.kanade.tachiyomi.widget.preference.IntListPreference
 import eu.kanade.tachiyomi.widget.preference.LibraryColumnsDialog
 import eu.kanade.tachiyomi.widget.preference.SimpleDialogPreference
+import net.xpece.android.support.preference.MultiSelectListPreference
 import rx.Observable
-import rx.Subscription
+import uy.kohesive.injekt.injectLazy
+
+class SettingsGeneralFragment : SettingsFragment(),
+        PreferenceFragmentCompat.OnPreferenceDisplayDialogCallback {
 
-class SettingsGeneralFragment : SettingsNestedFragment() {
 
     companion object {
-        fun newInstance(resourcePreference: Int, resourceTitle: Int): SettingsGeneralFragment {
+        fun newInstance(rootKey: String): SettingsGeneralFragment {
-            val fragment = SettingsGeneralFragment();
+            val args = Bundle()
-            fragment.setArgs(resourcePreference, resourceTitle);
+            args.putString(XpPreferenceFragment.ARG_PREFERENCE_ROOT, rootKey)
-            return fragment;
+            return SettingsGeneralFragment().apply { arguments = args }
         }
     }
 
+    private val preferences: PreferencesHelper by injectLazy()
+
+
     val columnsPreference by lazy {
         findPreference(getString(R.string.pref_library_columns_dialog_key)) as SimpleDialogPreference
     }
@@ -41,15 +49,13 @@ class SettingsGeneralFragment : SettingsNestedFragment() {
         findPreference(getString(R.string.pref_theme_key)) as IntListPreference
     }
 
-    var updateIntervalSubscription: Subscription? = null
+    override fun onViewCreated(view: View, savedState: Bundle?) {
+        super.onViewCreated(view, savedState)
 
-    var columnsSubscription: Subscription? = null
+        subscriptions += preferences.libraryUpdateInterval().asObservable()
-
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        updateIntervalSubscription = preferences.libraryUpdateInterval().asObservable()
                 .subscribe { updateRestriction.isVisible = it > 0 }
 
-        columnsSubscription = Observable.combineLatest(
+        subscriptions += Observable.combineLatest(
                 preferences.portraitColumns().asObservable(),
                 preferences.landscapeColumns().asObservable())
                 { portraitColumns, landscapeColumns -> Pair(portraitColumns, landscapeColumns) }
@@ -62,29 +68,21 @@ class SettingsGeneralFragment : SettingsNestedFragment() {
 
         themePreference.setOnPreferenceChangeListener { preference, newValue ->
             // Rebuild activity's to apply themes.
-            TaskStackBuilder.create(activity)
+            TaskStackBuilder.create(context)
-                    .addNextIntent(Intent(activity, MainActivity::class.java))
+                    .addNextIntentWithParentStack(Intent(activity.intent))
-                    .addNextIntent(activity.intent)
                     .startActivities()
             true
         }
     }
 
-    override fun onDestroyView() {
+    override fun onPreferenceDisplayDialog(p0: PreferenceFragmentCompat?, p: Preference): Boolean {
-        updateIntervalSubscription?.unsubscribe()
+        if (p.key == getString(R.string.pref_library_columns_dialog_key)) {
-        columnsSubscription?.unsubscribe()
+            val fragment = LibraryColumnsDialog.newInstance(p)
-        super.onDestroyView()
-
-    }
-
-    override fun onDisplayPreferenceDialog(preference: Preference) {
-        if (preference === columnsPreference) {
-            val fragment = LibraryColumnsDialog.newInstance(preference)
             fragment.setTargetFragment(this, 0)
-            fragment.show(fragmentManagerCompat, null)
+            fragment.show(childFragmentManager, null)
-        } else {
+            return true
-            super.onDisplayPreferenceDialog(preference)
         }
+        return false
     }
 
     private fun updateColumnsSummary(portraitColumns: Int, landscapeColumns: Int) {

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsNestedFragment.kt

@@ -1,48 +0,0 @@
-package eu.kanade.tachiyomi.ui.setting
-
-import android.app.FragmentManager
-import android.os.Build
-import android.os.Bundle
-import android.support.v14.preference.PreferenceFragment
-import eu.kanade.tachiyomi.data.preference.PreferencesHelper
-
-open class SettingsNestedFragment : PreferenceFragment() {
-
-    companion object {
-
-        private val RESOURCE_FILE = "resource_file"
-        private val TOOLBAR_TITLE = "toolbar_title"
-
-        fun newInstance(resourcePreference: Int, resourceTitle: Int): SettingsNestedFragment {
-            val fragment = SettingsNestedFragment()
-            fragment.setArgs(resourcePreference, resourceTitle)
-            return fragment
-        }
-
-    }
-
-    override fun onCreatePreferences(savedState: Bundle?, s: String?) {
-        addPreferencesFromResource(arguments.getInt(RESOURCE_FILE))
-    }
-
-    override fun onResume() {
-        super.onResume()
-        settingsActivity.setToolbarTitle(getString(arguments.getInt(TOOLBAR_TITLE)))
-    }
-
-    fun setArgs(resourcePreference: Int, resourceTitle: Int) {
-        val args = Bundle()
-        args.putInt(RESOURCE_FILE, resourcePreference)
-        args.putInt(TOOLBAR_TITLE, resourceTitle)
-        arguments = args
-    }
-
-    val settingsActivity: SettingsActivity
-        get() = activity as SettingsActivity
-
-    val preferences: PreferencesHelper
-        get() = settingsActivity.preferences
-
-    val fragmentManagerCompat: FragmentManager
-        get() = if (Build.VERSION.SDK_INT >= 17) childFragmentManager else fragmentManager
-}

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsSourcesFragment.kt

@@ -2,36 +2,45 @@ package eu.kanade.tachiyomi.ui.setting
 
 import android.content.Intent
 import android.os.Bundle
-import android.support.v14.preference.MultiSelectListPreference
 import android.support.v7.preference.Preference
 import android.support.v7.preference.PreferenceGroup
+import android.support.v7.preference.XpPreferenceFragment
 import android.view.View
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.data.source.Source
+import eu.kanade.tachiyomi.data.source.SourceManager
 import eu.kanade.tachiyomi.data.source.getLanguages
 import eu.kanade.tachiyomi.data.source.online.LoginSource
+import eu.kanade.tachiyomi.util.plusAssign
 import eu.kanade.tachiyomi.widget.preference.LoginPreference
 import eu.kanade.tachiyomi.widget.preference.SourceLoginDialog
-import rx.Subscription
+import net.xpece.android.support.preference.MultiSelectListPreference
+import uy.kohesive.injekt.injectLazy
 
-class SettingsSourcesFragment : SettingsNestedFragment() {
+class SettingsSourcesFragment : SettingsFragment() {
 
     companion object {
         const val SOURCE_CHANGE_REQUEST = 120
 
-        fun newInstance(resourcePreference: Int, resourceTitle: Int): SettingsNestedFragment {
+        fun newInstance(rootKey: String?): SettingsSourcesFragment {
-            val fragment = SettingsSourcesFragment()
+            val args = Bundle()
-            fragment.setArgs(resourcePreference, resourceTitle)
+            args.putString(XpPreferenceFragment.ARG_PREFERENCE_ROOT, rootKey)
-            return fragment
+            return SettingsSourcesFragment().apply { arguments = args }
         }
     }
 
+    private val preferences: PreferencesHelper by injectLazy()
+
+    private val sourceManager: SourceManager by injectLazy()
+
     val languagesPref by lazy { findPreference("pref_source_languages") as MultiSelectListPreference }
+
     val sourcesPref by lazy { findPreference("pref_sources") as PreferenceGroup }
 
-    var languagesSubscription: Subscription? = null
-
     override fun onViewCreated(view: View, savedState: Bundle?) {
+        super.onViewCreated(view, savedState)
+
         val langs = getLanguages()
 
         val entryKeys = langs.map { it.code }
@@ -39,11 +48,11 @@ class SettingsSourcesFragment : SettingsNestedFragment() {
         languagesPref.entryValues = entryKeys.toTypedArray()
         languagesPref.values = preferences.enabledLanguages().getOrDefault()
 
-        languagesSubscription = preferences.enabledLanguages().asObservable()
+        subscriptions += preferences.enabledLanguages().asObservable()
                 .subscribe { languages ->
                     sourcesPref.removeAll()
 
-                    val enabledSources = settingsActivity.sourceManager.getOnlineSources()
+                    val enabledSources = sourceManager.getOnlineSources()
                             .filter { it.lang.code in languages }
 
                     for (source in enabledSources.filterIsInstance(LoginSource::class.java)) {
@@ -56,11 +65,6 @@ class SettingsSourcesFragment : SettingsNestedFragment() {
                 }
     }
 
-    override fun onDestroyView() {
-        languagesSubscription?.unsubscribe()
-        super.onDestroyView()
-    }
-
     fun createLoginSourceEntry(source: Source): Preference {
         return LoginPreference(preferenceManager.context).apply {
             key = preferences.keys.sourceUsername(source.id)
@@ -69,7 +73,7 @@ class SettingsSourcesFragment : SettingsNestedFragment() {
             setOnPreferenceClickListener {
                 val fragment = SourceLoginDialog.newInstance(source)
                 fragment.setTargetFragment(this@SettingsSourcesFragment, SOURCE_CHANGE_REQUEST)
-                fragment.show(fragmentManagerCompat, null)
+                fragment.show(childFragmentManager, null)
                 true
             }
 

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsSyncFragment.kt

@@ -3,28 +3,38 @@ package eu.kanade.tachiyomi.ui.setting
 import android.content.Intent
 import android.os.Bundle
 import android.support.v7.preference.PreferenceCategory
+import android.support.v7.preference.XpPreferenceFragment
 import android.view.View
+import eu.kanade.tachiyomi.data.mangasync.MangaSyncManager
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.widget.preference.LoginPreference
 import eu.kanade.tachiyomi.widget.preference.MangaSyncLoginDialog
+import uy.kohesive.injekt.injectLazy
 
-class SettingsSyncFragment : SettingsNestedFragment() {
+class SettingsSyncFragment : SettingsFragment() {
 
     companion object {
         const val SYNC_CHANGE_REQUEST = 121
 
-        fun newInstance(resourcePreference: Int, resourceTitle: Int): SettingsNestedFragment {
+        fun newInstance(rootKey: String): SettingsSyncFragment {
-            val fragment = SettingsSyncFragment()
+            val args = Bundle()
-            fragment.setArgs(resourcePreference, resourceTitle)
+            args.putString(XpPreferenceFragment.ARG_PREFERENCE_ROOT, rootKey)
-            return fragment
+            return SettingsSyncFragment().apply { arguments = args }
         }
     }
 
+    private val syncManager: MangaSyncManager by injectLazy()
+
+    private val preferences: PreferencesHelper by injectLazy()
+
     val syncCategory by lazy { findPreference("pref_category_manga_sync_accounts") as PreferenceCategory }
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    override fun onViewCreated(view: View, savedState: Bundle?) {
+        super.onViewCreated(view, savedState)
+
         val themedContext = preferenceManager.context
 
-        for (sync in settingsActivity.syncManager.services) {
+        for (sync in syncManager.services) {
             val pref = LoginPreference(themedContext).apply {
                 key = preferences.keys.syncUsername(sync.id)
                 title = sync.name
@@ -32,7 +42,7 @@ class SettingsSyncFragment : SettingsNestedFragment() {
                 setOnPreferenceClickListener {
                     val fragment = MangaSyncLoginDialog.newInstance(sync)
                     fragment.setTargetFragment(this@SettingsSyncFragment, SYNC_CHANGE_REQUEST)
-                    fragment.show(fragmentManagerCompat, null)
+                    fragment.show(childFragmentManager, null)
                     true
                 }
             }

app/src/main/java/eu/kanade/tachiyomi/util/DiskUtils.java

@@ -2,7 +2,6 @@ package eu.kanade.tachiyomi.util;
 
 import java.io.File;
 import java.io.IOException;
-import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 
@@ -16,7 +15,7 @@ public final class DiskUtils {
         String cacheKey;
         try {
             final MessageDigest mDigest = MessageDigest.getInstance("MD5");
-            mDigest.update(key.getBytes(StandardCharsets.UTF_8));
+            mDigest.update(key.getBytes());
             cacheKey = bytesToHexString(mDigest.digest());
         } catch (NoSuchAlgorithmException e) {
             cacheKey = String.valueOf(key.hashCode());

app/src/main/java/eu/kanade/tachiyomi/widget/preference/LibraryColumnsDialog.kt

@@ -1,15 +1,15 @@
 package eu.kanade.tachiyomi.widget.preference
 
 import android.os.Bundle
-import android.support.v14.preference.PreferenceDialogFragment
 import android.support.v7.preference.Preference
+import android.support.v7.preference.PreferenceDialogFragmentCompat
 import android.view.View
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
-import eu.kanade.tachiyomi.ui.setting.SettingsActivity
 import kotlinx.android.synthetic.main.pref_library_columns.view.*
+import uy.kohesive.injekt.injectLazy
 
-class LibraryColumnsDialog : PreferenceDialogFragment() {
+class LibraryColumnsDialog : PreferenceDialogFragmentCompat() {
 
     companion object {
 
@@ -25,8 +25,7 @@ class LibraryColumnsDialog : PreferenceDialogFragment() {
     var portrait: Int = 0
     var landscape: Int = 0
 
-    val preferences: PreferencesHelper
+    val preferences: PreferencesHelper by injectLazy()
-        get() = (activity as SettingsActivity).preferences
 
     override fun onBindDialogView(view: View) {
         super.onBindDialogView(view)

app/src/main/java/eu/kanade/tachiyomi/widget/preference/LoginDialogPreference.kt

@@ -1,28 +1,27 @@
 package eu.kanade.tachiyomi.widget.preference
 
 import android.app.Dialog
-import android.app.DialogFragment
 import android.content.DialogInterface
 import android.content.Intent
 import android.os.Bundle
+import android.support.v4.app.DialogFragment
 import android.text.method.PasswordTransformationMethod
 import android.view.View
 import com.afollestad.materialdialogs.MaterialDialog
 import com.dd.processbutton.iml.ActionProcessButton
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
-import eu.kanade.tachiyomi.ui.setting.SettingsActivity
 import eu.kanade.tachiyomi.widget.SimpleTextWatcher
 import kotlinx.android.synthetic.main.pref_account_login.view.*
 import rx.Subscription
+import uy.kohesive.injekt.injectLazy
 
 abstract class LoginDialogPreference : DialogFragment() {
 
     var v: View? = null
         private set
 
-    val preferences: PreferencesHelper
+    val preferences: PreferencesHelper by injectLazy()
-        get() = (activity as SettingsActivity).preferences
 
     var requestSubscription: Subscription? = null
 

app/src/main/java/eu/kanade/tachiyomi/widget/preference/MangaSyncLoginDialog.kt

@@ -3,12 +3,13 @@ package eu.kanade.tachiyomi.widget.preference
 import android.os.Bundle
 import android.view.View
 import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.mangasync.MangaSyncManager
 import eu.kanade.tachiyomi.data.mangasync.MangaSyncService
-import eu.kanade.tachiyomi.ui.setting.SettingsActivity
 import eu.kanade.tachiyomi.util.toast
 import kotlinx.android.synthetic.main.pref_account_login.view.*
 import rx.android.schedulers.AndroidSchedulers
 import rx.schedulers.Schedulers
+import uy.kohesive.injekt.injectLazy
 
 class MangaSyncLoginDialog : LoginDialogPreference() {
 
@@ -23,13 +24,15 @@ class MangaSyncLoginDialog : LoginDialogPreference() {
         }
     }
 
+    val syncManager: MangaSyncManager by injectLazy()
+
     lateinit var sync: MangaSyncService
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         val syncId = arguments.getInt("key")
-        sync = (activity as SettingsActivity).syncManager.getService(syncId)!!
+        sync = syncManager.getService(syncId)!!
     }
 
     override fun setCredentialsOnView(view: View) = with(view) {

app/src/main/java/eu/kanade/tachiyomi/widget/preference/SourceLoginDialog.kt

@@ -4,12 +4,13 @@ import android.os.Bundle
 import android.view.View
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.source.Source
+import eu.kanade.tachiyomi.data.source.SourceManager
 import eu.kanade.tachiyomi.data.source.online.LoginSource
-import eu.kanade.tachiyomi.ui.setting.SettingsActivity
 import eu.kanade.tachiyomi.util.toast
 import kotlinx.android.synthetic.main.pref_account_login.view.*
 import rx.android.schedulers.AndroidSchedulers
 import rx.schedulers.Schedulers
+import uy.kohesive.injekt.injectLazy
 
 class SourceLoginDialog : LoginDialogPreference() {
 
@@ -24,13 +25,15 @@ class SourceLoginDialog : LoginDialogPreference() {
         }
     }
 
+    val sourceManager: SourceManager by injectLazy()
+
     lateinit var source: LoginSource
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         val sourceId = arguments.getInt("key")
-        source = (activity as SettingsActivity).sourceManager.get(sourceId) as LoginSource
+        source = sourceManager.get(sourceId) as LoginSource
     }
 
     override fun setCredentialsOnView(view: View) = with(view) {

app/src/main/res/values-v21/themes.xml

@@ -8,7 +8,6 @@
         <item name="android:windowDrawsSystemBarBackgrounds">true</item>
         <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:navigationBarColor">@color/colorPrimaryDark</item>
-        <item name="android:alertDialogTheme">@style/Theme.AlertDialog.Light</item>
     </style>
 
     <!--============-->
@@ -19,6 +18,5 @@
         <item name="android:windowDrawsSystemBarBackgrounds">true</item>
         <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:navigationBarColor">@color/colorPrimaryDark</item>
-        <item name="android:alertDialogTheme">@style/Theme.AlertDialog.Dark</item>
     </style>
 </resources>

app/src/main/res/values/themes.xml

@@ -26,7 +26,9 @@
         <!-- Themes -->
         <item name="windowActionModeOverlay">true</item>
         <item name="actionBarTheme">@style/Theme.ActionBar.Light</item>
-        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
+        <item name="preferenceTheme">@style/PreferenceThemeOverlay.Material</item>
+        <item name="alertDialogTheme">@style/Theme.AlertDialog.Light</item>
+
 
         <!-- Custom Attributes-->
         <item name="selectable_list_drawable">@drawable/list_item_selector_light</item>
@@ -61,7 +63,9 @@
         <item name="windowActionModeOverlay">true</item>
         <item name="actionBarTheme">@style/ThemeOverlay.AppCompat.Dark.ActionBar</item>
         <item name="actionBarPopupTheme">@style/ThemeOverlay.AppCompat</item>
-        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
+        <item name="preferenceTheme">@style/PreferenceThemeOverlay.Material</item>
+        <item name="alertDialogTheme">@style/Theme.AlertDialog.Dark</item>
+
 
         <!-- Custom Attributes-->
         <item name="navigation_view_theme">@style/Theme.Widget.NavigationView.Dark</item>

app/src/main/res/xml/pref_about.xml

@@ -1,8 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <SwitchPreferenceCompat
+    <PreferenceScreen
+        android:key="about_screen"
+        android:title="@string/pref_category_about"
+        android:persistent="false">
+
+        <SwitchPreference
             android:defaultValue="true"
             android:key="acra.enable"
             android:summary="@string/pref_acra_summary"
@@ -25,4 +29,6 @@
             android:persistent="false"
             android:title="@string/build_time"/>
 
-</android.support.v7.preference.PreferenceScreen>
+    </PreferenceScreen>
+
+</PreferenceScreen>

app/src/main/res/xml/pref_advanced.xml

@@ -1,7 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen
+<PreferenceScreen
     xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <PreferenceScreen
+        android:key="advanced_screen"
+        android:persistent="false"
+        android:title="@string/pref_category_advanced">
+
         <Preference
             android:key="@string/pref_clear_chapter_cache_key"
             android:title="@string/pref_clear_chapter_cache"/>
@@ -15,10 +20,12 @@
             android:summary="@string/pref_clear_database_summary"
             android:title="@string/pref_clear_database"/>
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:defaultValue="false"
             android:key="@string/pref_reencode_key"
             android:summary="@string/pref_reencode_summary"
             android:title="@string/pref_reencode"/>
 
-</android.support.v7.preference.PreferenceScreen>
+    </PreferenceScreen>
+
+</PreferenceScreen>

app/src/main/res/xml/pref_downloads.xml

@@ -1,12 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <PreferenceScreen
+        android:key="downloads_screen"
+        android:persistent="false"
+        android:title="@string/pref_category_downloads">
 
         <Preference
             android:key="@string/pref_download_directory_key"
             android:title="@string/pref_download_directory"/>
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:defaultValue="true"
             android:key="@string/pref_download_only_over_wifi_key"
             android:title="@string/pref_download_only_over_wifi"/>
@@ -22,22 +26,25 @@
         <PreferenceCategory
             android:persistent="false"
             android:title="@string/cat_remove_after_read"/>
-    <SwitchPreferenceCompat
+
+        <SwitchPreference
             android:defaultValue="false"
             android:key="@string/pref_remove_after_marked_as_read_key"
             android:title="@string/pref_remove_after_marked_as_read"/>
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:defaultValue="false"
             android:key="@string/pref_remove_after_read_key"
             android:summary="@string/current_chapter"
             android:title="@string/pref_remove_after_read"/>
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:defaultValue="false"
             android:dependency="@string/pref_remove_after_read_key"
             android:key="@string/pref_remove_after_read_previous_key"
             android:summary="@string/previous_chapter"
             android:title="@string/pref_remove_after_read"/>
 
-</android.support.v7.preference.PreferenceScreen>
+    </PreferenceScreen>
+
+</PreferenceScreen>

app/src/main/res/xml/pref_general.xml

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <PreferenceScreen
+        android:key="general_screen"
+        android:persistent="false"
+        android:title="@string/pref_category_general">
 
         <eu.kanade.tachiyomi.widget.preference.IntListPreference
             android:defaultValue="1"
@@ -31,9 +35,11 @@
             android:summary="@string/pref_library_update_restriction_summary"
             android:title="@string/pref_library_update_restriction" />
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:defaultValue="false"
             android:key="@string/pref_update_only_non_completed_key"
             android:title="@string/pref_update_only_non_completed"/>
 
-</android.support.v7.preference.PreferenceScreen>
+    </PreferenceScreen>
+
+</PreferenceScreen>

app/src/main/res/xml/pref_main.xml

@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen
-    xmlns:android="http://schemas.android.com/apk/res/android" >
-
-    <Preference
-        android:key="@string/pref_category_general_key"
-        android:persistent="false"
-        android:title="@string/pref_category_general" />
-
-    <Preference
-        android:key="@string/pref_category_reader_key"
-        android:persistent="false"
-        android:title="@string/pref_category_reader" />
-
-    <Preference
-        android:key="@string/pref_category_downloads_key"
-        android:persistent="false"
-        android:title="@string/pref_category_downloads" />
-
-    <Preference
-        android:key="@string/pref_category_sources_key"
-        android:persistent="false"
-        android:title="@string/pref_category_sources" />
-    
-    <Preference
-        android:key="@string/pref_category_sync_key"
-        android:persistent="false"
-        android:title="@string/pref_category_sync" />
-
-    <Preference
-        android:key="@string/pref_category_advanced_key"
-        android:persistent="false"
-        android:title="@string/pref_category_advanced" />
-
-    <Preference
-        android:key="@string/pref_category_about_key"
-        android:persistent="false"
-        android:title="@string/pref_category_about" />
-
-</android.support.v7.preference.PreferenceScreen>

app/src/main/res/xml/pref_reader.xml

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <PreferenceScreen
+        android:key="reader_screen"
+        android:persistent="false"
+        android:title="@string/pref_category_reader">
 
         <eu.kanade.tachiyomi.widget.preference.IntListPreference
             android:title="@string/pref_viewer_type"
@@ -50,27 +54,27 @@
             android:defaultValue="0"
             android:summary="%s" />
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:title="@string/pref_hide_status_bar"
             android:key="@string/pref_hide_status_bar_key"
             android:defaultValue="true" />
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:title="@string/pref_enable_transitions"
             android:key="@string/pref_enable_transitions_key"
             android:defaultValue="true" />
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:title="@string/pref_show_page_number"
             android:key="@string/pref_show_page_number_key"
             android:defaultValue="true" />
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:title="@string/pref_custom_brightness"
             android:key="@string/pref_custom_brightness_key"
             android:defaultValue="false" />
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:title="@string/pref_keep_screen_on"
             android:key="@string/pref_keep_screen_on_key"
             android:defaultValue="true" />
@@ -78,16 +82,18 @@
         <PreferenceCategory
             android:title="@string/pref_reader_navigation">
 
-        <SwitchPreferenceCompat
+            <SwitchPreference
                 android:title="@string/pref_read_with_tapping"
                 android:key="@string/pref_read_with_tapping_key"
                 android:defaultValue="true" />
 
-        <SwitchPreferenceCompat
+            <SwitchPreference
                 android:title="@string/pref_read_with_volume_keys"
                 android:key="@string/pref_read_with_volume_keys_key"
                 android:defaultValue="false" />
 
         </PreferenceCategory>
 
-</android.support.v7.preference.PreferenceScreen>
+    </PreferenceScreen>
+
+</PreferenceScreen>

app/src/main/res/xml/pref_sources.xml

@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    xmlns:android="http://schemas.android.com/apk/res/android"
+
-    android:orderingFromXml="true">
+    <PreferenceScreen
+        android:key="sources_screen"
+        android:persistent="false"
+        android:title="@string/pref_category_sources">
 
         <MultiSelectListPreference
             android:key="@string/pref_source_languages"
@@ -13,4 +16,6 @@
             android:persistent="false"
             android:title="@string/accounts"/>
 
-</android.support.v7.preference.PreferenceScreen>
+    </PreferenceScreen>
+
+</PreferenceScreen>

app/src/main/res/xml/pref_sync.xml

@@ -1,14 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orderingFromXml="true">
 
-    <SwitchPreferenceCompat
+    <PreferenceScreen
+        android:key="sync_screen"
+        android:persistent="false"
+        android:title="@string/pref_category_sync">
+
+        <SwitchPreference
             android:key="@string/pref_auto_update_manga_sync_key"
             android:title="@string/pref_auto_update_manga_sync"
             android:defaultValue="true"/>
 
-    <SwitchPreferenceCompat
+        <SwitchPreference
             android:key="@string/pref_ask_update_manga_sync_key"
             android:title="@string/pref_ask_update_manga_sync"
             android:defaultValue="false"
@@ -19,4 +22,6 @@
             android:title="@string/services"
             android:persistent="false"/>
 
-</android.support.v7.preference.PreferenceScreen>
+    </PreferenceScreen>
+
+</PreferenceScreen>