Update. Add language setting.

app/src/main/res/layout/content_main.xml

@@ -59,7 +59,8 @@
             android:text="0"
             android:textAppearance="@style/TextAppearance.AppCompat.Body1"
             android:textSize="18sp"
-            android:textStyle="bold" />
+            android:textStyle="bold"
+            tools:ignore="HardcodedText" />
 
         <TextView
             android:id="@+id/scoreB"
@@ -70,7 +71,8 @@
             android:text="0"
             android:textAppearance="@style/TextAppearance.AppCompat.Body1"
             android:textSize="18sp"
-            android:textStyle="bold" />
+            android:textStyle="bold"
+            tools:ignore="HardcodedText" />
 
     </LinearLayout>
 
@@ -136,7 +138,8 @@
             android:gravity="center"
             android:hint="0"
             android:importantForAutofill="no"
-            android:inputType="numberSigned" />
+            android:inputType="numberSigned"
+            tools:ignore="HardcodedText" />
 
         <EditText
             android:id="@+id/inputTeamB"
@@ -147,7 +150,8 @@
             android:gravity="center"
             android:hint="0"
             android:importantForAutofill="no"
-            android:inputType="numberSigned" />
+            android:inputType="numberSigned"
+            tools:ignore="HardcodedText" />
     </LinearLayout>
 
     <LinearLayout
@@ -164,7 +168,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="1" />
+            android:text="1"
+            tools:ignore="HardcodedText" />
 
         <Button
             android:id="@+id/button2"
@@ -172,7 +177,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="2" />
+            android:text="2"
+            tools:ignore="HardcodedText" />
 
         <Button
             android:id="@+id/button3"
@@ -180,7 +186,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="3" />
+            android:text="3"
+            tools:ignore="HardcodedText" />
 
         <Button
             android:id="@+id/buttonAdd100"
@@ -188,7 +195,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="+100" />
+            android:text="+100"
+            tools:ignore="HardcodedText" />
     </LinearLayout>
 
     <LinearLayout
@@ -205,7 +213,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="4" />
+            android:text="4"
+            tools:ignore="HardcodedText" />
 
         <Button
             android:id="@+id/button5"
@@ -213,7 +222,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="5" />
+            android:text="5"
+            tools:ignore="HardcodedText" />
 
         <Button
             android:id="@+id/button6"
@@ -221,7 +231,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="6" />
+            android:text="6"
+            tools:ignore="HardcodedText" />
 
         <Button
             android:id="@+id/buttonSub100"
@@ -229,7 +240,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="-100" />
+            android:text="-100"
+            tools:ignore="HardcodedText" />
     </LinearLayout>
 
     <LinearLayout
@@ -246,7 +258,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="7" />
+            android:text="7"
+            tools:ignore="HardcodedText" />
 
         <Button
             android:id="@+id/button8"
@@ -254,7 +267,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="8" />
+            android:text="8"
+            tools:ignore="HardcodedText" />
 
         <Button
             android:id="@+id/button9"
@@ -262,7 +276,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="9" />
+            android:text="9"
+            tools:ignore="HardcodedText" />
 
         <ImageButton
             android:id="@+id/buttonBack"
@@ -275,7 +290,7 @@
             android:paddingBottom="15dp"
             android:scaleType="fitCenter"
             app:srcCompat="@drawable/back"
-            android:contentDescription="TODO" />
+            android:contentDescription="@string/back" />
 
     </LinearLayout>
 

app/src/main/res/menu/menu_main.xml

@@ -17,6 +17,10 @@
         android:id="@+id/action_theme"
         android:orderInCategory="15"
         android:title="@string/choose_theme_text" />
+    <item
+        android:id="@+id/action_language"
+        android:orderInCategory="16"
+        android:title="@string/choose_language_text" />
     <item
         android:id="@+id/action_screenOn"
         android:checkable="true"

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

@@ -7,4 +7,11 @@
     <string name="confirmClear">Möchten Sie das laufende Spiel wirklich löschen?</string>
     <string name="yes">Ja</string>
     <string name="no">Nein</string>
+    <string name="back">Zurück</string>
+    <string name="choose_language_text">Sprache wählen</string>
+    <string name="android_default_text">Android Standard</string>
+    <string name="english">Englisch</string>
+    <string name="german">Detusch</string>
+    <string name="light">Hell</string>
+    <string name="dark">Dunkel</string>
 </resources>

app/src/main/res/values-gsw-rCH/strings.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <string name="clear">Neus Spil starte</string>
-    <string name="undo">Letschti Rundi lösche</string>
-    <string name="choose_theme_text">Usgsehe ändere</string>
-    <string name="keep_screen_on">Bildschirm igschalted la</string>
-    <string name="confirmClear">Wosch ds loufende Spil würklech lösche?</string>
-    <string name="yes">Ja</string>
-    <string name="no">Nei</string>
-</resources>

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

@@ -1,9 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="app_name" translatable="false">Tichu Counter</string>
-    <!-- Strings used for fragments for navigation -->
-
     <string name="team_a" translatable="false">Team A</string>
     <string name="team_b" translatable="false">Team B</string>
+
     <string name="clear">Start new game</string>
     <string name="undo">Undo last round</string>
     <string name="choose_theme_text">Choose theme</string>
@@ -11,4 +11,11 @@
     <string name="confirmClear">Do you really want to delete the current game?</string>
     <string name="yes">Yes</string>
     <string name="no">No</string>
+    <string name="back">Back</string>
+    <string name="choose_language_text">Choose language</string>
+    <string name="android_default_text">Android Default</string>
+    <string name="english">English</string>
+    <string name="german">German</string>
+    <string name="light">Light</string>
+    <string name="dark">Dark</string>
 </resources>

app/src/main/res/xml/locales_config.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<locale-config xmlns:android="http://schemas.android.com/apk/res/android">
+    <locale android:name="en"/>
+    <locale android:name="de"/>
+</locale-config>