Add project.

app/src/main/java/com/hyperling/expensetracker/MainActivity.kt

@@ -0,0 +1,80 @@
+package com.hyperling.expensetracker
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Button
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.core.content.ContextCompat
+import androidx.core.content.ContextCompat.startActivity
+import com.hyperling.expensetracker.ui.theme.ExpenseTrackerTheme
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            ExpenseTrackerTheme {
+                Surface {
+                    Main()
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun Main() {
+    val context = LocalContext.current
+
+    Column (
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+        modifier = Modifier.fillMaxSize()
+    ) {
+
+        Row (
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.Center
+        ) {
+            Text(
+                text = "Main Screen"
+            )
+        }
+        Row (
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.Center
+        ) {
+            Button(onClick = {
+                val intent = Intent(context, NewExpenseActivity::class.java)
+                context.startActivity(intent)
+            }) {
+                Text(text = "Create New Expense")
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun MainPreview() {
+    ExpenseTrackerTheme {
+        Main()
+    }
+}