Update MainActivity.java

app/src/main/java/pk/edu/pucit/helloworld/MainActivity.java

@@ -73,3 +73,78 @@ public boolean onOptionsItemSelected(@NonNull MenuItem item) {
             return super.onOptionsItemSelected(item);
     }
 }
+package pk.edu.pucit.helloworld;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+public class MainActivity extends AppCompatActivity {
+    int counter = 0;
+    TextView tv;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        tv = findViewById(R.id.textview);
+        tv.setText(counter + "");
+
+        View.OnClickListener listener = new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                counter++;
+                tv.setText(counter + "");
+            }
+        };
+        View.OnClickListener declistener = new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                counter--;
+                tv.setText(counter + "");
+            }
+        };
+        Button btn_inc = findViewById(R.id.btn);
+        btn_inc.setOnClickListener(listener);
+        Button btn_dec = findViewById(R.id.btn2);
+        btn_dec.setOnClickListener(declistener);
+        String message = getString(android.R.string.dialog_alert_title);
+
+//        AlertDialog ad = new AlertDialog.Builder(this)
+//                .setMessage(R.string.message)
+//                .setTitle(getString(android.R.string.dialog_alert_title))
+//                .create();
+//        ad.show();
+        Toast.makeText(this,"this is a string",Toast.LENGTH_LONG).show();
+
+
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        new MenuInflater(this).inflate(R.menu.mainmenu,menu);
+        return super.onCreateOptionsMenu(menu);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
+        if(item.getItemId()==R.id.menu_reset){
+            counter=0;
+            tv.setText(counter + "");
+            return true;
+        }
+        else
+            return super.onOptionsItemSelected(item);
+    }
+}