refactor: Use androidx.core:core-splashscreen library (#766)

Previous code depended on, but did not initialise, the androidx
splashscreen library.

Fix that, using the library on API < 31, or the platform implementation
otherwise.

`SplashActivity` is no longer needed, launching goes straight in to
`MainActivity`.

Version 1.2.0-alpha01 is needed to fix some theme corruption bugs in
earlier versions of the library.

app/src/main/AndroidManifest.xml

@@ -25,22 +25,6 @@
         android:networkSecurityConfig="@xml/network_security_config"
         android:enableOnBackInvokedCallback="true">
 
-        <activity
-            android:name=".SplashActivity"
-            android:theme="@style/SplashTheme"
-            android:exported="true">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-
-            <meta-data
-                android:name="android.app.shortcuts"
-                android:resource="@xml/share_shortcuts" />
-
-        </activity>
         <activity
             android:name=".feature.login.LoginActivity"
             android:windowSoftInputMode="adjustResize"
@@ -56,11 +40,20 @@
                     android:scheme="@string/oauth_scheme" />
             </intent-filter>
         </activity>
+
         <activity android:name=".feature.login.LoginWebViewActivity" />
+
         <activity
             android:name=".MainActivity"
             android:configChanges="orientation|screenSize|keyboardHidden|screenLayout|smallestScreenSize"
-            android:exported="true">
+            android:exported="true"
+            android:theme="@style/SplashTheme">
+
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
 
             <intent-filter>
                 <action android:name="android.intent.action.SEND" />
@@ -109,6 +102,9 @@
                 android:name="android.service.chooser.chooser_target_service"
                 android:value="androidx.sharetarget.ChooserTargetServiceCompat" />
 
+            <meta-data
+                android:name="android.app.shortcuts"
+                android:resource="@xml/share_shortcuts" />
         </activity>
         <activity
             android:name=".components.compose.ComposeActivity"

app/src/main/java/app/pachli/MainActivity.kt

@@ -48,6 +48,7 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.app.ActivityCompat
 import androidx.core.content.pm.ShortcutManagerCompat
 import androidx.core.content.res.ResourcesCompat
+import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
 import androidx.core.view.GravityCompat
 import androidx.core.view.MenuProvider
 import androidx.core.view.forEach
@@ -229,10 +230,13 @@ class MainActivity : BottomSheetActivity(), ActionButtonActivity, MenuProvider {
 
     @SuppressLint("RestrictedApi")
     override fun onCreate(savedInstanceState: Bundle?) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
+            installSplashScreen()
+        }
         super.onCreate(savedInstanceState)
 
-        val activeAccount = accountManager.activeAccount
-            ?: return // will be redirected to LoginActivity by BaseActivity
+        // will be redirected to LoginActivity by BaseActivity
+        val activeAccount = accountManager.activeAccount ?: return
 
         var showNotificationTab = false
 

app/src/main/java/app/pachli/SplashActivity.kt

@@ -1,52 +0,0 @@
-/*
- * Copyright 2023 Pachli Association
- *
- * This file is a part of Pachli.
- *
- * This program is free software; you can redistribute it and/or modify it under the terms of the
- * GNU General Public License as published by the Free Software Foundation; either version 3 of the
- * License, or (at your option) any later version.
- *
- * Pachli is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with Pachli; if not,
- * see <http://www.gnu.org/licenses>.
- */
-
-package app.pachli
-
-import android.annotation.SuppressLint
-import android.os.Bundle
-import androidx.appcompat.app.AppCompatActivity
-import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
-import app.pachli.core.accounts.AccountManager
-import app.pachli.core.navigation.LoginActivityIntent
-import app.pachli.core.navigation.LoginActivityIntent.LoginMode
-import app.pachli.core.navigation.MainActivityIntent
-import dagger.hilt.android.AndroidEntryPoint
-import javax.inject.Inject
-
-@SuppressLint("CustomSplashScreen")
-@AndroidEntryPoint
-class SplashActivity : AppCompatActivity() {
-
-    @Inject
-    lateinit var accountManager: AccountManager
-
-    override fun onCreate(savedInstanceState: Bundle?) {
-        installSplashScreen()
-        super.onCreate(savedInstanceState)
-
-        /** Determine whether the user is currently logged in, and if so go ahead and load the
-         *  timeline. Otherwise, start the activity_login screen. */
-        val intent = if (accountManager.activeAccount != null) {
-            MainActivityIntent(this)
-        } else {
-            LoginActivityIntent(this, LoginMode.DEFAULT)
-        }
-        startActivity(intent)
-        finish()
-    }
-}

core/activity/src/main/kotlin/app/pachli/core/activity/BaseActivity.kt

@@ -56,6 +56,7 @@ import dagger.hilt.android.AndroidEntryPoint
 import dagger.hilt.android.EntryPointAccessors.fromApplication
 import dagger.hilt.components.SingletonComponent
 import javax.inject.Inject
+import kotlin.properties.Delegates
 import timber.log.Timber
 
 @AndroidEntryPoint
@@ -68,13 +69,18 @@ abstract class BaseActivity : AppCompatActivity(), MenuProvider {
 
     private var requesters: HashMap<Int, PermissionRequester> = HashMap()
 
+    /** The most recent theme ID set with [setTheme]. */
+    @get:StyleRes
+    private var activeThemeId by Delegates.notNull<Int>()
+
     @EntryPoint
     @InstallIn(SingletonComponent::class)
     interface SharedPreferencesRepositoryEntryPoint {
         fun sharedPreferencesRepository(): SharedPreferencesRepository
     }
 
-    override fun setTheme(themeId: Int) {
+    override fun setTheme(@StyleRes themeId: Int) {
+        activeThemeId = themeId
         super.setTheme(themeId)
         if (BuildConfig.DEBUG) {
             val name = resources.getResourceEntryName(themeId)
@@ -97,6 +103,8 @@ abstract class BaseActivity : AppCompatActivity(), MenuProvider {
         Timber.d("activeTheme: %s", theme)
         if (theme == AppTheme.BLACK) {
             setTheme(DR.style.Theme_Pachli_Black)
+        } else if (activeThemeId == DR.style.SplashTheme) {
+            setTheme(DR.style.Theme_Pachli)
         }
 
         // Set the task description, the theme would turn it blue

core/designsystem/src/main/res/values/styles.xml

@@ -58,7 +58,6 @@
 
     <style name="SplashTheme" parent="Theme.SplashScreen">
         <item name="windowSplashScreenAnimatedIcon">@drawable/ic_splash</item>
-        <item name="postSplashScreenTheme">@style/Theme.Pachli</item>
     </style>
 
     <style name="Theme.Pachli" parent="Base.Theme.Pachli">

gradle/libs.versions.toml

@@ -18,7 +18,7 @@ androidx-paging = "3.3.0"
 androidx-preference = "1.2.1"
 androidx-recyclerview = "1.3.2"
 androidx-sharetarget = "1.2.0"
-androidx-splashscreen = "1.0.1"
+androidx-splashscreen = "1.2.0-alpha01"
 androidx-startup = "1.1.1"
 androidx-swiperefresh-layout = "1.1.0"
 androidx-testing = "2.2.0"