Create activity.java

Author: cs-joy

HelloWorld/app/activity.java

@@ -0,0 +1,12 @@
+import android.view.View
+import android.widget.TextView
+import android.widget.EditText
+
+public void onBtnClick(View view){
+    TextView txtHello = findViewById(R.id.txtMessage);
+    EditView edtTxtName = findViewById(R.id.edtTxtName);
+    
+    String user = edtTxtName.getText().toString();
+    
+    txtHello.setText("Hello, " + user);
+}