Myujth

Why can't i create a popup dialog inside of my fab.setOnClickListener(View in the onCreatemethod?

Is it due to thesyntax? Am i missing expressions?
Is my code outdated as my instructor is a old udemy course?

 public class MainActivity extends AppCompatActivity 

 private AlertDialog.Builder dialogBuilder;
 private AlertDialog dialog;
 private EditText groceryItem;
 private EditText getGroceryItem;
 private EditText quantity;
 private Button saveButton;

 @Override
 protected void onCreate(Bundle savedInstanceState) 
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 Toolbar toolbar = findViewById(R.id.toolbar);
 setSupportActionBar(toolbar);

 FloatingActionButton fab = findViewById(R.id.fab);
 // === error appears on the next line ===
 fab.setOnClickListener(View, 

 createPopupDialog());

 

 @Override
 public boolean onCreateOptionsMenu(Menu menu) 
 // Inflate the menu; this adds items to the action bar if it is present.
 getMenuInflater().inflate(R.menu.menu_main, menu);
 return true;
 

 @Override
 public boolean onOptionsItemSelected(MenuItem item) 
 // Handle action bar item clicks here. The action bar will
 // automatically handle clicks on the Home/Up button, so long
 // as you specify a parent activity in AndroidManifest.xml.
 int id = item.getItemId();

 //noinspection SimplifiableIfStatement
 if (id == R.id.action_settings) 
 return true;
 

 return super.onOptionsItemSelected(item);
 


 private void createPopupDialog() 

 dialogBuilder = new AlertDialog.Builder(this);
 View view = getLayoutInflater().inflate(R.layout.popup, null);
 groceryItem = view.findViewById(R.id.groceryItem);
 quantity = view.findViewById(groceryQty);
 saveButton = view.findViewById(R.id.saveButton);

 dialogBuilder.setView(view);
 dialog = dialogBuilder.create();
 dialog.show();



 


 

I think you wanted to use lambda expression. If this is the case, this is the correct syntax:

fab.setOnClickListener((View v) -> 
 createPopupDialog();
);

You are not passing the right arguments in setOnClickListener().

Create the listener like this:

fab.setOnClickListener(new View.OnClickListener() 
 @Override
 public void onClick(View v) 
 createPopupDialog();
 
);