Add preference activity.

app/build.gradle

@@ -81,6 +81,7 @@ dependencies {
     implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.1'
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1'
     implementation 'androidx.fragment:fragment:1.4.1'
+    implementation 'androidx.preference:preference:1.1.1'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.4'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.0'

app/src/main/AndroidManifest.xml

@@ -11,10 +11,19 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <activity
+            android:name=".SettingsActivity"
+            android:exported="false"
+            android:label="@string/title_activity_settings">
+            <meta-data
+                android:name="android.app.lib_name"
+                android:value="" />
+        </activity>
+
         <service
             android:name=".Tichu"
             android:enabled="true"
-            android:exported="true"></service>
+            android:exported="true" />
 
         <activity
             android:name=".MainActivity"

app/src/main/java/me/zobrist/tichucounter/MainActivity.kt

@@ -110,8 +110,8 @@ class MainActivity : AppCompatActivity() {
         // Inflate the menu; this adds items to the action bar if it is present.
         menuInflater.inflate(R.menu.menu_main, menu)
 
-        menu.findItem(R.id.action_screenOn).isChecked =
+        //menu.findItem(R.id.action_screenOn).isChecked =
-            this.getSharedPreferences("Settings", MODE_PRIVATE).getBoolean("Screen_On", false)
+        //    this.getSharedPreferences("Settings", MODE_PRIVATE).getBoolean("Screen_On", false)
         return true
     }
 
@@ -142,19 +142,24 @@ class MainActivity : AppCompatActivity() {
                 }
                 true
             }
-            R.id.action_theme -> {
+            R.id.settings -> {
-                chooseThemeDialog()
+                val i = Intent(this, SettingsActivity::class.java)
-                true
+                startActivity(i)
-            }
-            R.id.action_language -> {
-                chooseLanguageDialog()
-                true
-            }
-            R.id.action_screenOn -> {
-                item.isChecked = !item.isChecked
-                keepScreenOn(item.isChecked)
                 true
             }
+            //R.id.action_theme -> {
+            //    chooseThemeDialog()
+            //    true
+            //}
+            //R.id.action_language -> {
+            //    chooseLanguageDialog()
+            //    true
+            //}
+            //R.id.action_screenOn -> {
+            //    item.isChecked = !item.isChecked
+            //    keepScreenOn(item.isChecked)
+            //    true
+            //}
             else -> super.onOptionsItemSelected(item)
         }
     }

app/src/main/java/me/zobrist/tichucounter/SettingsActivity.kt

@@ -0,0 +1,61 @@
+package me.zobrist.tichucounter
+
+import android.app.AlertDialog
+import android.content.Intent
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
+import androidx.appcompat.app.AppCompatActivity
+import androidx.preference.PreferenceFragmentCompat
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import me.zobrist.tichucounter.databinding.SettingsActivityBinding
+
+
+@AndroidEntryPoint
+class SettingsActivity : AppCompatActivity() {
+
+    private lateinit var binding: SettingsActivityBinding
+
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = SettingsActivityBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        if (savedInstanceState == null) {
+            supportFragmentManager
+                .beginTransaction()
+                .replace(R.id.settings, SettingsFragment())
+                .commit()
+        }
+
+        setSupportActionBar(binding.toolbar)
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+        supportActionBar?.setHomeButtonEnabled(true)
+        supportActionBar?.title = resources.getString(R.string.settings)
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return when (item.itemId) {
+            android.R.id.home -> {
+                val i = Intent(this, MainActivity::class.java)
+                navigateUpTo(i)
+                true
+            }
+            else -> super.onOptionsItemSelected(item)
+        }
+    }
+
+
+    class SettingsFragment : PreferenceFragmentCompat() {
+        override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+            setPreferencesFromResource(R.xml.root_preferences, rootKey)
+        }
+    }
+
+
+}

app/src/main/res/drawable/ic_baseline_add_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@color/colorPrimary" android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
+</vector>

app/src/main/res/drawable/ic_baseline_undo_24.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="#FFFFFF" android:viewportHeight="24"
+    android:viewportWidth="24" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@color/colorPrimary" android:pathData="M12.5,8c-2.65,0 -5.05,0.99 -6.9,2.6L2,7v9h9l-3.62,-3.62c1.39,-1.16 3.16,-1.88 5.12,-1.88 3.54,0 6.55,2.31 7.6,5.5l2.37,-0.78C21.08,11.03 17.15,8 12.5,8z"/>
+</vector>

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

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <FrameLayout
+        android:id="@+id/settings"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
+

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

@@ -4,26 +4,21 @@
     tools:context="me.zobrist.tichucounter.MainActivity">
     <item
         android:id="@+id/action_undo"
-        android:icon="@android:drawable/ic_menu_revert"
+        android:icon="@drawable/ic_baseline_undo_24"
         android:orderInCategory="5"
-        android:title="@string/undo" />
+        android:title="@string/undo"
+        app:showAsAction="ifRoom"/>
     <item
         android:id="@+id/action_clear"
+        android:icon="@drawable/ic_baseline_add_24"
         android:checkable="false"
         android:orderInCategory="10"
         android:title="@string/clear"
+        app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/settings"
+        android:checkable="false"
+        android:orderInCategory="10"
+        android:title="@string/settings"
         app:showAsAction="never" />
-    <item
-        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"
-        android:orderInCategory="20"
-        android:title="@string/keep_screen_on" />
 </menu>

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

@@ -14,4 +14,5 @@
     <string name="german">Detusch</string>
     <string name="light">Hell</string>
     <string name="dark">Dunkel</string>
+    <string name="settings">Einstellungen</string>
 </resources>

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

@@ -0,0 +1,25 @@
+<resources>
+    <!-- Theme Preference -->
+    <string-array name="theme_entries">
+        <item>@string/dark</item>
+        <item>@string/light</item>
+        <item>@string/android_default_text</item>
+    </string-array>
+
+    <string-array name="theme_values">
+        <item>dark</item>
+        <item>light</item>
+        <item>default</item>
+    </string-array>
+
+    <!-- Language Preference -->
+    <string-array name="language_entries">
+        <item>@string/german</item>
+        <item>@string/english</item>
+    </string-array>
+
+    <string-array name="language_values">
+        <item>german</item>
+        <item>english</item>
+    </string-array>
+</resources>

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

@@ -18,4 +18,21 @@
     <string name="german">German</string>
     <string name="light">Light</string>
     <string name="dark">Dark</string>
+    <string name="title_activity_settings">SettingsActivity</string>
+
+    <!-- Preference Titles -->
+    <string name="messages_header">Messages</string>
+    <string name="sync_header">Sync</string>
+
+    <!-- Messages Preferences -->
+    <string name="signature_title">Your signature</string>
+    <string name="reply_title">Theme</string>
+
+    <!-- Sync Preferences -->
+    <string name="sync_title">Sync email periodically</string>
+    <string name="attachment_title">Download incoming attachments</string>
+    <string name="attachment_summary_on">Automatically download attachments for incoming emails
+    </string>
+    <string name="attachment_summary_off">Only download attachments when manually requested</string>
+    <string name="settings">Settings</string>
 </resources>

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

@@ -1,6 +1,6 @@
 <resources>
     <!-- Base application theme. -->
-    <style name="AppTheme" parent="Theme.AppCompat.DayNight">
+    <style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
         <!-- Customize your theme here. -->
         <item name="colorPrimary">@color/colorPrimary</item>
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
@@ -9,7 +9,7 @@
     </style>
 
     <style name="AppTheme.NoActionBar">
-        <item name="windowActionBar">false</item>
+        <item name="windowActionBar">true</item>
         <item name="windowNoTitle">true</item>
     </style>
 

app/src/main/res/xml/root_preferences.xml

@@ -0,0 +1,27 @@
+<PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <PreferenceCategory app:title="@string/messages_header">
+
+        <ListPreference
+            app:defaultValue="default"
+            app:entries="@array/theme_entries"
+            app:entryValues="@array/theme_values"
+            app:key="theme"
+            app:title="@string/choose_theme_text"
+            app:useSimpleSummaryProvider="true" />
+
+
+        <ListPreference
+            app:defaultValue="reply"
+            app:entries="@array/language_entries"
+            app:entryValues="@array/language_values"
+            app:key="language"
+            app:title="@string/choose_language_text"
+            app:useSimpleSummaryProvider="true" />
+
+        <SwitchPreferenceCompat
+            app:key="screen"
+            app:title="@string/keep_screen_on" />
+
+    </PreferenceCategory>
+</PreferenceScreen>