Option to set starting screen + back returns to start

By default it's same behavior as before, last used between recents or library
Other setting is self-explanatory, on by default

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt

@@ -7,6 +7,10 @@ object PreferenceKeys {
 
     const val theme = "pref_theme_key"
 
+    const val startingTab = "starting_tab"
+
+    const val backToStart = "back_to_start"
+
     const val rotation = "pref_rotation_type_key"
 
     const val enableTransitions = "pref_enable_transitions_key"

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -77,7 +77,8 @@ class PreferencesHelper(val context: Context) {
     fun getStringPref(key: String, default: String?) = rxPrefs.getString(key, default)
     fun getStringSet(key: String, default: Set<String>) = rxPrefs.getStringSet(key, default)
 
-    fun lastTab() = rxPrefs.getInteger("last_tab", 0)
+    fun startingTab() = flowPrefs.getInt(Keys.startingTab, 0)
+    fun backReturnsToStart() = flowPrefs.getBoolean(Keys.backToStart, true)
 
     fun clear() = prefs.edit().clear().apply()
 

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -18,6 +18,7 @@ import android.view.ViewGroup
 import android.view.WindowInsets
 import android.view.WindowManager
 import android.webkit.WebView
+import androidx.annotation.IdRes
 import androidx.appcompat.graphics.drawable.DrawerArrowDrawable
 import androidx.core.content.ContextCompat
 import androidx.core.graphics.ColorUtils
@@ -188,8 +189,6 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
                 ) return@setOnNavigationItemSelectedListener false
             }
             continueSwitchingTabs = false
-            if (item.itemId != R.id.nav_browse)
-                preferences.lastTab().set(item.itemId)
             val currentRoot = router.backstack.firstOrNull()
             if (currentRoot?.tag()?.toIntOrNull() != id) {
                 setRoot(
@@ -247,8 +246,7 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
         if (!router.hasRootController()) {
             // Set start screen
             if (!handleIntentAction(intent)) {
-                val lastItemId = bottom_nav.menu.findItem(preferences.lastTab().getOrDefault())?.itemId
-                bottom_nav.selectedItemId = lastItemId ?: R.id.nav_library
+                goToStartingTab()
             }
         }
 
@@ -413,6 +411,7 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
     override fun onPause() {
         super.onPause()
         snackBar?.dismiss()
+        setStartingTab()
     }
 
     private fun getAppUpdates() {
@@ -515,10 +514,43 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
         if (if (router.backstackSize == 1) !(sheetController?.handleSheetBack() ?: false)
             else !router.handleBack()
         ) {
+            if (preferences.backReturnsToStart().get() &&
+                startingTab() != bottom_nav?.selectedItemId) {
+                goToStartingTab()
+            }
+            else {
+                if (!preferences.backReturnsToStart().get()) {
+                    setStartingTab()
+                }
                 SecureActivityDelegate.locked = true
                 super.onBackPressed()
             }
         }
+    }
+
+    private fun setStartingTab() {
+        if (bottom_nav?.selectedItemId != R.id.nav_browse
+            && bottom_nav?.selectedItemId != null
+            && preferences.startingTab().get() >= 0)
+            preferences.startingTab().set(when (bottom_nav?.selectedItemId) {
+                R.id.nav_library -> 0
+                else -> 1
+            })
+    }
+
+    @IdRes
+    private fun startingTab(): Int {
+        return when (preferences.startingTab().get()) {
+            0, -1 -> R.id.nav_library
+            1, -2 -> R.id.nav_recents
+            -3 -> R.id.nav_browse
+            else -> R.id.nav_library
+        }
+    }
+
+    private fun goToStartingTab() {
+        bottom_nav.selectedItemId = startingTab()
+    }
 
     private fun setRoot(controller: Controller, id: Int) {
         router.setRoot(controller.withFadeTransaction().tag(id.toString()))

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

@@ -18,45 +18,24 @@ class SettingsGeneralController : SettingsController() {
     override fun setupPreferenceScreen(screen: PreferenceScreen) = with(screen) {
         titleRes = R.string.general
 
-        listPreference(activity) {
-            key = Keys.lang
-            titleRes = R.string.language
-            entryValues = listOf(
-                "", "ar", "bg", "bn", "ca", "cs", "de", "el", "en-US", "en-GB",
-                "es", "fr", "hi", "hu", "in", "it", "ja", "ko", "lv", "ms", "nb-rNO", "nl", "pl", "pt",
-                "pt-BR", "ro", "ru", "sc", "sr", "sv", "th", "tl", "tr", "uk", "vi", "zh-rCN"
+        intListPreference(activity) {
+            key = Keys.startingTab
+            titleRes = R.string.starting_screen
+            entriesRes = arrayOf(
+                R.string.last_used_library_recents,
+                R.string.library,
+                R.string.recents,
+                R.string.browse
             )
-            entries = entryValues.map { value ->
-                val locale = LocaleHelper.getLocaleFromString(value.toString())
-                locale?.getDisplayName(locale)?.capitalize()
-                    ?: context.getString(R.string.system_default)
-            }
-            defaultValue = ""
-            summary = "%s"
-
-            onChange { newValue ->
-                val activity = activity ?: return@onChange false
-                val app = activity.application
-                LocaleHelper.changeLocale(newValue.toString())
-                LocaleHelper.updateConfiguration(app, app.resources.configuration)
-                activity.recreate()
-                true
-            }
+            entryValues = (0 downTo -3).toList()
+            defaultValue = 0
         }
 
-        listPreference(activity) {
-            key = Keys.dateFormat
-            titleRes = R.string.date_format
-            entryValues = listOf("", "MM/dd/yy", "dd/MM/yy", "yyyy-MM-dd")
-            entries = entryValues.map { value ->
-                if (value == "") {
-                    context.getString(R.string.system_default)
-                } else {
-                    value
-                }
-            }
-            defaultValue = ""
-            summary = "%s"
+        switchPreference {
+            key = Keys.backToStart
+            titleRes = R.string.back_to_start
+            summaryRes = R.string.pressing_back_to_start
+            defaultValue = true
         }
 
         switchPreference {
@@ -80,6 +59,40 @@ class SettingsGeneralController : SettingsController() {
             }
         }
 
+        preferenceCategory {
+            titleRes = R.string.display
+
+            intListPreference(activity) {
+                key = Keys.theme
+                titleRes = R.string.app_theme
+                entriesRes = arrayOf(
+                    R.string.white_theme,
+                    R.string.light_blue,
+                    R.string.dark,
+                    R.string.amoled_black,
+                    R.string.dark_blue,
+                    R.string.system_default,
+                    R.string
+                        .system_default_amoled,
+                    R.string.system_default_all_blue
+                )
+                entryValues = listOf(1, 8, 2, 3, 4, 5, 6, 7)
+                defaultValue = 5
+
+                onChange {
+                    activity?.recreate()
+                    true
+                }
+            }
+
+            switchPreference {
+                key = Keys.hideBottomNavOnScroll
+                titleRes = R.string.hide_bottom_nav
+                summaryRes = R.string.hides_on_scroll
+                defaultValue = true
+            }
+        }
+
         preferenceCategory {
             titleRes = R.string.security
 
@@ -132,36 +145,47 @@ class SettingsGeneralController : SettingsController() {
         }
 
         preferenceCategory {
-            titleRes = R.string.display
+            titleRes = R.string.locale
 
-            intListPreference(activity) {
-                key = Keys.theme
-                titleRes = R.string.app_theme
-                entriesRes = arrayOf(
-                    R.string.white_theme,
-                    R.string.light_blue,
-                    R.string.dark,
-                    R.string.amoled_black,
-                    R.string.dark_blue,
-                    R.string.system_default,
-                    R.string
-                        .system_default_amoled,
-                    R.string.system_default_all_blue
+            listPreference(activity) {
+                key = Keys.lang
+                titleRes = R.string.language
+                entryValues = listOf(
+                    "", "ar", "bg", "bn", "ca", "cs", "de", "el", "en-US", "en-GB",
+                    "es", "fr", "hi", "hu", "in", "it", "ja", "ko", "lv", "ms", "nb-rNO", "nl", "pl", "pt",
+                    "pt-BR", "ro", "ru", "sc", "sr", "sv", "th", "tl", "tr", "uk", "vi", "zh-rCN"
                 )
-                entryValues = listOf(1, 8, 2, 3, 4, 5, 6, 7)
-                defaultValue = 5
+                entries = entryValues.map { value ->
+                    val locale = LocaleHelper.getLocaleFromString(value.toString())
+                    locale?.getDisplayName(locale)?.capitalize()
+                        ?: context.getString(R.string.system_default)
+                }
+                defaultValue = ""
+                summary = "%s"
 
-                onChange {
-                    activity?.recreate()
+                onChange { newValue ->
+                    val activity = activity ?: return@onChange false
+                    val app = activity.application
+                    LocaleHelper.changeLocale(newValue.toString())
+                    LocaleHelper.updateConfiguration(app, app.resources.configuration)
+                    activity.recreate()
                     true
                 }
             }
 
-            switchPreference {
-                key = Keys.hideBottomNavOnScroll
-                titleRes = R.string.hide_bottom_nav
-                summaryRes = R.string.hides_on_scroll
-                defaultValue = true
+            listPreference(activity) {
+                key = Keys.dateFormat
+                titleRes = R.string.date_format
+                entryValues = listOf("", "MM/dd/yy", "dd/MM/yy", "yyyy-MM-dd")
+                entries = entryValues.map { value ->
+                    if (value == "") {
+                        context.getString(R.string.system_default)
+                    } else {
+                        value
+                    }
+                }
+                defaultValue = ""
+                summary = "%s"
             }
         }
     }

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

@@ -506,6 +506,8 @@
     <string name="white_theme">Pure White</string>
     <string name="system_default_amoled">System default (White + Black)</string>
     <string name="system_default_all_blue">System default (All Blue)</string>
+    <string name="locale">Locale</string>
+    <string name="last_used_library_recents">Last used (Library or Recents)</string>
     <string name="language">Language</string>
     <string name="system_default">System default</string>
     <string name="date_format">Date format</string>
@@ -516,6 +518,9 @@
     <string name="hides_on_scroll">Hides when scrolling</string>
     <string name="hide_tachi_from_recents">Hide Tachiyomi from the recents screen</string>
     <string name="security">Security</string>
+    <string name="starting_screen">Starting screen</string>
+    <string name="back_to_start">Back to start</string>
+    <string name="pressing_back_to_start">Pressing back to starting screen</string>
 
     <!-- Backup -->
     <string name="backup">Backup</string>