Pierwsze guziki z onClick

Projekt3/.idea/deploymentTargetSelector.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetSelector">
+    <selectionStates>
+      <SelectionState runConfigName="app">
+        <option name="selectionMode" value="DROPDOWN" />
+      </SelectionState>
+    </selectionStates>
+  </component>
+</project>
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Projekt3/app/src/main/java/com/example/projekt3/MainActivity.java

 package com.example.projekt3;
 
 import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.TextView;
+import android.widget.Toast;
 
 import androidx.activity.EdgeToEdge;
 import androidx.appcompat.app.AppCompatActivity;
@@ -8,7 +12,10 @@ import androidx.core.graphics.Insets;
 import androidx.core.view.ViewCompat;
 import androidx.core.view.WindowInsetsCompat;
 
+import java.time.LocalDateTime;
+
 public class MainActivity extends AppCompatActivity {
+    private static final String TAG = "MainActivity";
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -21,4 +28,15 @@ public class MainActivity extends AppCompatActivity {
             return insets;
         });
     }
+
+    public void klik1(View view) {
+        Toast.makeText(this, "Hej, tu guzik 1", Toast.LENGTH_LONG).show();
+        Log.d(TAG, "klik1: tak, tak, działa");
+    }
+
+    public void pokazCzas(View view) {
+        String dt = LocalDateTime.now().toString();
+        TextView textView = findViewById(R.id.textView);
+        textView.setText(dt);
+    }
 }
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Projekt3/app/src/main/res/layout/activity_main.xml

@@ -8,12 +8,36 @@
     tools:context=".MainActivity">
 
     <TextView
+        android:id="@+id/textView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Hello World!"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.3" />
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="Kliknij"
+        android:onClick="klik1"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView" />
+
+    <Button
+        android:id="@+id/button2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:onClick="pokazCzas"
+        android:text="Pokaż czas"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/button" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
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