What is onCreateOptionsMenu(Menu menu)

Question

What are the two parameters Menu and menu in method onCreateOptionsMenu(Menu menu) and how to use this method. I have another question why this pa

Answer 1

The intent of implementing this method is to populate de menu passed with the itens you define in the R.menu.game_menu layout file.

Java

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.game_menu, menu);
    return true;
}

Kotlin

override fun onCreateOptionsMenu(menu: Menu): Boolean {
    menuInflater.inflate(R.menu.game_menu, menu)
    return true
}

After inflating the menu with the itens you might want to add some action when they are selected:

Java

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.menu_item:
            // Action goes here
            return true;
        default:
            return super.onOptionsItemSelected(item);
    }
}

Kotlin

override fun onOptionsItemSelected(item: MenuItem): Boolean {
    return when (item.itemId) {
        R.id.menu_item -> {
            // Action goes here
            true
        }
        else -> super.onOptionsItemSelected(item)
    }
}