Add Options in settings

Add License and Readme
Fixed color issues
Update About page
Fixed About button and package

app/src/main/java/com/schoolapp/cleverclass/SettingsActivity.kt

@@ -1,11 +1,13 @@
 package com.schoolapp.cleverclass
 
+import android.content.Context
 import android.content.Intent
+import android.content.SharedPreferences
+import android.content.SharedPreferences.Editor
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -14,6 +16,7 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.wrapContentHeight
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
@@ -29,12 +32,14 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
-import com.schoolapp.cleverclass.ui.theme.AboutActivity
 import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
 
+
 class SettingsActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -52,12 +57,17 @@ class SettingsActivity : ComponentActivity() {
 // Content of Settings
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun SettingsContent(activity: ComponentActivity){
-    Column {
+fun SettingsContent(activity: ComponentActivity) {
+    val sharedPreferences = activity.getSharedPreferences("Settings", Context.MODE_PRIVATE)
+    val editor = sharedPreferences.edit()
+
+    Column(modifier = Modifier.fillMaxSize()) {
+        // Top AppBar
         TopAppBar(
             colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
             title = {
-                Text(text = "Einstellungen",
+                Text(
+                    text = "Einstellungen",
                     style = MaterialTheme.typography.headlineSmall
                 )
             },
@@ -74,39 +84,57 @@ fun SettingsContent(activity: ComponentActivity){
         )
 
         // Settings
-        Column(modifier = Modifier.verticalScroll(rememberScrollState())) {
-            Setting(text = "Stundenplan")
-            Setting(text = "Noten")
-            Setting(text = "Periodensystem")
-            Setting(text = "Mebis")
-            Setting(text = "DSBmobile")
+        Column(
+            modifier = Modifier
+                .weight(1f)
+                .verticalScroll(rememberScrollState())
+                .fillMaxWidth()
+
+        ) {
+            Setting(text = "Stundenplan", sharedPreferences, editor)
+            Setting(text = "Noten", sharedPreferences, editor)
+            Setting(text = "Periodensystem", sharedPreferences, editor)
+            Setting(text = "Mebis", sharedPreferences, editor)
+            Setting(text = "DSBmobile", sharedPreferences, editor)
         }
 
         // About Button
         Column(
-            modifier = Modifier.fillMaxWidth(),
-            verticalArrangement = Arrangement.Bottom,
-            horizontalAlignment = Alignment.CenterHorizontally,)
-        {
-            Spacer(modifier = Modifier.weight(1f))
+            modifier = Modifier
+                .fillMaxWidth()
+                .wrapContentHeight(),
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
             Divider()
             Spacer(modifier = Modifier.height(16.dp))
-            Text(text = "About",
+            Text(
+                text = "About",
+                style = MaterialTheme.typography.bodySmall,
                 modifier = Modifier.clickable {
                     val intent = Intent(activity, AboutActivity::class.java)
-                    activity.startActivity(intent)},
-                style = MaterialTheme.typography.bodySmall)
+                    activity.startActivity(intent)
+                }
+            )
             Spacer(modifier = Modifier.height(16.dp))
         }
     }
 }
 
+
 @Composable
-fun Setting(text : String){
+fun Setting(text : String, sharedPreferences: SharedPreferences, editor: Editor){
+    val checkedState = remember { mutableStateOf(sharedPreferences.getBoolean(text, true)) }
     Spacer(modifier = Modifier.height(16.dp))
     Row(verticalAlignment = Alignment.CenterVertically) {
         Spacer(modifier = Modifier.width(16.dp))
-        Switch(checked = true, onCheckedChange = null)
+        Switch(
+            checked = checkedState.value,
+            onCheckedChange = { isChecked ->
+                checkedState.value = isChecked
+                editor.putBoolean(text, isChecked)
+                editor.apply()
+            }
+        )
         Spacer(modifier = Modifier.width(16.dp))
         Text(text = text,
             color = MaterialTheme.colorScheme.onPrimaryContainer,