Initial work on dark theme

app/src/main/java/com/readrops/app/ReadropsApp.java

@@ -5,7 +5,10 @@ import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.os.Build;
 
+import androidx.appcompat.app.AppCompatDelegate;
+
 import com.facebook.stetho.Stetho;
+import com.readrops.app.utils.SharedPreferencesManager;
 
 import io.reactivex.plugins.RxJavaPlugins;
 
@@ -26,6 +29,8 @@ public class ReadropsApp extends Application {
         }
 
         createNotificationChannels();
+        if (Boolean.valueOf(SharedPreferencesManager.readString(this, SharedPreferencesManager.SharedPrefKey.DARK_THEME)))
+            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
     }
 
     private void createNotificationChannels() {

app/src/main/java/com/readrops/app/fragments/settings/SettingsFragment.java

@@ -3,6 +3,7 @@ package com.readrops.app.fragments.settings;
 import android.content.Intent;
 import android.os.Bundle;
 
+import androidx.appcompat.app.AppCompatDelegate;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
 
@@ -21,9 +22,10 @@ public class SettingsFragment extends PreferenceFragmentCompat {
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         addPreferencesFromResource(R.xml.preferences);
 
-        AtomicBoolean serviceStarted = new AtomicBoolean(false);
         Preference feedsColorsPreference = findPreference("reload_feeds_colors");
+        Preference themePreference = findPreference("dark_theme");
 
+        AtomicBoolean serviceStarted = new AtomicBoolean(false);
         feedsColorsPreference.setOnPreferenceClickListener(preference -> {
             Database database = Database.getInstance(getContext());
 
@@ -39,5 +41,18 @@ public class SettingsFragment extends PreferenceFragmentCompat {
 
             return true;
         });
+
+        themePreference.setOnPreferenceChangeListener((preference, newValue) -> {
+            boolean darkTheme = Boolean.parseBoolean(newValue.toString());
+
+            if (darkTheme) {
+                AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
+            } else {
+                AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
+            }
+
+            return true;
+        });
     }
+
 }

app/src/main/java/com/readrops/app/utils/SharedPreferencesManager.java

@@ -51,7 +51,8 @@ public final class SharedPreferencesManager {
     public enum SharedPrefKey {
         SHOW_READ_ARTICLES("show_read_articles", false),
         ITEMS_TO_PARSE_MAX_NB("items_to_parse_max_nb", "20"),
-        OPEN_ITEMS_IN("open_items_in", "0");
+        OPEN_ITEMS_IN("open_items_in", "0"),
+        DARK_THEME("dark_theme", "false");
 
         @NonNull
         private String key;
@@ -59,7 +60,7 @@ public final class SharedPreferencesManager {
         private Object defaultValue;
 
         public boolean getBooleanDefaultValue() {
-            return (boolean) defaultValue;
+            return Boolean.valueOf(defaultValue.toString());
         }
 
         public String getStringDefaultValue() {
@@ -67,7 +68,7 @@ public final class SharedPreferencesManager {
         }
 
         public int getIntDefaultValue() {
-            return (int) defaultValue;
+            return Integer.parseInt(defaultValue.toString());
         }
 
         SharedPrefKey(@NonNull String key, @NonNull Object defaultValue) {

app/src/main/res/values-fr-rFR/strings.xml

@@ -106,5 +106,8 @@
     <string name="image_options">Options de l\'image</string>
     <string name="download_image">Télécharger l\'image</string>
     <string name="share_image">Partager l\'image</string>
+    <string name="theme">Thème</string>
+    <string name="light">Clair</string>
+    <string name="dark">Sombre</string>
 
 </resources>

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

@@ -0,0 +1,10 @@
+<resources>
+
+    <style name="AppTheme" parent="Theme.AppCompat.DayNight.DarkActionBar">
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+
+        <item name="actionBarTheme">@style/ThemeOverlay.AppCompat.Dark.ActionBar</item>
+    </style>
+</resources>

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

@@ -39,4 +39,13 @@
         <item>1</item>
     </string-array>
 
+    <string-array name="themes">
+        <item>@string/light</item>
+        <item>@string/dark</item>
+    </string-array>
+
+    <string-array name="themes_values">
+        <item>false</item>
+        <item>true</item>
+    </string-array>
 </resources>

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

@@ -115,4 +115,7 @@
     <string name="image_options">Image Options</string>
     <string name="download_image">Download image</string>
     <string name="share_image">Share image</string>
+    <string name="theme">Theme</string>
+    <string name="light">Light</string>
+    <string name="dark">Dark</string>
 </resources>

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

@@ -1,8 +1,6 @@
 <resources>
 
-    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.DayNight.DarkActionBar">
-    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
-        <!-- Customize your theme here. -->
         <item name="colorPrimary">@color/colorPrimary</item>
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="colorAccent">@color/colorAccent</item>

app/src/main/res/xml/preferences.xml

@@ -16,11 +16,18 @@
             android:title="@string/reload_feeds_colors" />
 
         <ListPreference
-            android:defaultValue="@string/external_navigator"
+            android:defaultValue="1"
             android:entries="@array/open_items_in"
             android:entryValues="@array/open_item_in_values"
             android:key="open_items_in"
             android:title="@string/open_items_in" />
+
+        <ListPreference
+            android:defaultValue="1"
+            android:entries="@array/themes"
+            android:entryValues="@array/themes_values"
+            android:key="dark_theme"
+            android:title="@string/theme" />
     </PreferenceCategory>
 
 </PreferenceScreen>