Fixed dark theme issue.

app/src/main/java/apps/amine/bou/readerforselfoss/HomeActivity.kt

@@ -577,9 +577,9 @@ class HomeActivity : AppCompatActivity(), SearchView.OnQueryTextListener {
                             LibsBuilder()
                                 .withActivityStyle(
                                     if (appColors.isDarkTheme) {
-                                        Libs.ActivityStyle.LIGHT_DARK_TOOLBAR
-                                    } else {
                                         Libs.ActivityStyle.DARK
+                                    } else {
+                                        Libs.ActivityStyle.LIGHT_DARK_TOOLBAR
                                     }
                                 )
                                 .withAboutIconShown(true)

app/src/main/java/apps/amine/bou/readerforselfoss/ReaderActivity.kt

@@ -2,14 +2,17 @@ package apps.amine.bou.readerforselfoss
 
 import android.content.Context
 import android.content.res.Resources
+import android.graphics.drawable.ColorDrawable
 import android.os.Bundle
 import android.preference.PreferenceManager
 import android.support.v4.app.FragmentManager
 import android.support.v4.app.FragmentStatePagerAdapter
+import android.support.v4.content.ContextCompat
 import android.support.v4.view.ViewPager
 import android.support.v7.app.AppCompatActivity
 import android.view.Menu
 import android.view.MenuItem
+import android.view.ViewGroup
 import android.widget.Toast
 import apps.amine.bou.readerforselfoss.api.selfoss.Item
 import apps.amine.bou.readerforselfoss.api.selfoss.SelfossApi
@@ -54,8 +57,6 @@ class ReaderActivity : AppCompatActivity() {
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {
-        val appColors = AppColors(this@ReaderActivity)
-
         super.onCreate(savedInstanceState)
 
         setContentView(R.layout.activity_reader)
@@ -88,7 +89,7 @@ class ReaderActivity : AppCompatActivity() {
 
         currentItem = intent.getIntExtra("currentItem", 0)
 
-        pager.adapter = ScreenSlidePagerAdapter(supportFragmentManager)
+        pager.adapter = ScreenSlidePagerAdapter(supportFragmentManager, AppColors(this@ReaderActivity))
         pager.currentItem = currentItem
     }
 
@@ -175,8 +176,10 @@ class ReaderActivity : AppCompatActivity() {
         oldInstanceState!!.clear()
     }
 
-    private inner class ScreenSlidePagerAdapter(fm: FragmentManager) :
+    private inner class ScreenSlidePagerAdapter(fm: FragmentManager, val appColors: AppColors) :
         FragmentStatePagerAdapter(fm) {
+
+
         override fun getCount(): Int {
             return allItems.size
         }
@@ -184,6 +187,12 @@ class ReaderActivity : AppCompatActivity() {
         override fun getItem(position: Int): ArticleFragment {
             return ArticleFragment.newInstance(position, allItems)
         }
+
+        override fun startUpdate(container: ViewGroup) {
+            super.startUpdate(container)
+
+            container.background = ColorDrawable(ContextCompat.getColor(this@ReaderActivity, appColors.colorBackground))
+        }
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {

app/src/main/java/apps/amine/bou/readerforselfoss/themes/AppColors.kt

@@ -17,6 +17,7 @@ class AppColors(a: Activity) {
     @ColorInt val colorAccent: Int
     @ColorInt val colorAccentDark: Int
     @ColorInt val cardBackgroundColor: Int
+    @ColorInt val colorBackground: Int
     val isDarkTheme: Boolean
 
     init {
@@ -48,10 +49,12 @@ class AppColors(a: Activity) {
                     false
                 )
 
-        if (isDarkTheme) {
+        colorBackground = if (isDarkTheme) {
             a.setTheme(R.style.NoBarDark)
+            R.color.darkBackground
         } else {
             a.setTheme(R.style.NoBar)
+            android.R.color.background_light
         }
 
         val wrapper = Context::class.java

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

@@ -24,7 +24,7 @@
         <item name="colorAccent">@color/colorAccent</item>
         <item name="colorAccentDark">@color/colorAccentDark</item>
         <item name="cardBackgroundColor">@color/md_grey_800</item>
-        <item name="android:colorBackground">#303030</item>
+        <item name="android:colorBackground">@color/darkBackground</item>
         <item name="bnbBackgroundColor">@color/md_grey_900</item>
         <item name="android:textColorPrimary">@color/md_white_1000</item>
         <item name="android:textColorSecondary">@color/md_grey_600</item>

build.gradle

@@ -10,7 +10,7 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.1'
+        classpath 'com.android.tools.build:gradle:3.1.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong