Update Main-screen and add PSEActivity

app/src/main/AndroidManifest.xml

@@ -12,6 +12,11 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.CleverClass"
         tools:targetApi="31">
+        <activity
+            android:name=".PSEActivity"
+            android:exported="false"
+            android:label="@string/title_activity_pseactivity"
+            android:theme="@style/Theme.CleverClass" />
         <activity
             android:name=".MainActivity"
             android:exported="true"

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

@@ -1,5 +1,7 @@
 package com.schoolapp.cleverclass
 
+import android.content.Context
+import android.content.Intent
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
@@ -20,12 +22,13 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.unit.dp
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
 
@@ -36,7 +39,7 @@ class MainActivity : ComponentActivity() {
             CleverClassTheme {
                 Surface(modifier = Modifier.fillMaxSize(),
                         color = MaterialTheme.colorScheme.background) {
-                    Content()
+                    MainContent()
                 }
             }
         }
@@ -47,7 +50,8 @@ class MainActivity : ComponentActivity() {
 // Content of Main-screen
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun Content(){
+fun MainContent(){
+    val context = LocalContext.current
     Column() {
         TopAppBar(
             colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.background),
@@ -59,14 +63,14 @@ fun Content(){
         )
 
         Column(modifier = Modifier.verticalScroll(rememberScrollState())) {
-            Button(onClick = { /*TODO*/ }, color = Color(0xFFFF8A80), text = "Periodensystem")
-            Button(onClick = { /*TODO*/ }, color = Color(0xFF8C9EFF), text = "Stundenplan")
-            Button(onClick = { /*TODO*/ }, color = Color(0xFFEA80FC), text = "Noten")
-            Button(onClick = { /*TODO*/ }, color = Color(0xFF40C4FF), text = "Mebis")
-            Button(onClick = { /*TODO*/ }, color = Color(0xFFB2FF59), text = "DSBmobile")
-            Button(onClick = { /*TODO*/ }, color = Color(0xFF69F0AE), text = "...")
-            Button(onClick = { /*TODO*/ }, color = Color(0xFFFFD740), text = "...")
-            Button(onClick = { /*TODO*/ }, color = Color(0xFFE040FB), text = "...")
+            MainButton(onClick = { switchToActivity(context, PSEActivity::class.java) }, color = Color(0xFFFF8A80), text = "Periodensystem")
+            MainButton(onClick = { /*TODO*/ }, color = Color(0xFF8C9EFF), text = "Stundenplan")
+            MainButton(onClick = { /*TODO*/ }, color = Color(0xFFEA80FC), text = "Noten")
+            MainButton(onClick = { /*TODO*/ }, color = Color(0xFF40C4FF), text = "Mebis")
+            MainButton(onClick = { /*TODO*/ }, color = Color(0xFFB2FF59), text = "DSBmobile")
+            MainButton(onClick = { /*TODO*/ }, color = Color(0xFF69F0AE), text = "...")
+            MainButton(onClick = { /*TODO*/ }, color = Color(0xFFFFD740), text = "...")
+            MainButton(onClick = { /*TODO*/ }, color = Color(0xFFE040FB), text = "...")
         }
     }
 }
@@ -74,9 +78,9 @@ fun Content(){
 
 // Main-menu Buttons
 @Composable
-fun Button(onClick: () -> Unit, color : Color, text : String) {
+fun MainButton(onClick: () -> Unit, color : Color, text : String) {
     Button(
-        onClick = { onClick() },
+        onClick = onClick,
         shape = RoundedCornerShape(40),
         colors = ButtonDefaults.outlinedButtonColors(containerColor = color),
         modifier = Modifier
@@ -89,4 +93,9 @@ fun Button(onClick: () -> Unit, color : Color, text : String) {
             fontFamily = FontFamily(Font(R.font.arlrdbd, FontWeight.Normal)),
             fontSize = 20.sp)
     }
+}
+
+fun switchToActivity(context : Context, activity : Class<*>){
+    val intent = Intent(context, activity)
+    context.startActivity(intent)
 }

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

@@ -0,0 +1,67 @@
+package com.schoolapp.cleverclass
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.Font
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+
+class PSEActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            CleverClassTheme {
+                Surface(modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background) {
+                    PSEContent(activity = this)
+                }
+            }
+        }
+    }
+}
+
+// Content of PSE
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun PSEContent(activity: ComponentActivity){
+    Column() {
+        TopAppBar(
+            colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.background),
+            title = {
+                Text(text = "Periodensystem",
+                    fontFamily = FontFamily(Font(R.font.arlrdbd, FontWeight.Normal))
+                )
+            },
+            navigationIcon = {
+                IconButton(onClick = { activity.finish() }) {
+                    Icon(
+                        imageVector = Icons.Filled.ArrowBack,
+                        contentDescription = null
+                    )
+                }
+            },
+            modifier = Modifier.fillMaxWidth()
+        )
+
+        Column() {
+
+        }
+    }
+}

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

@@ -1,3 +1,4 @@
 <resources>
     <string name="app_name">CleverClass</string>
+    <string name="title_activity_pseactivity">PSEActivity</string>
 </resources>