The android.app Activity onPrepareOptionsMenu method is used to prepare the options menu of an activity before it is displayed. It is called every time the user opens the options menu. This method provides a good opportunity for you to update the options menu dynamically based on the current state of the application.
Here are some examples of how to use onPrepareOptionsMenu in Java:
Example 1:
public boolean onPrepareOptionsMenu(Menu menu) { if (mIsLoggedIn) { menu.findItem(R.id.menu_login).setVisible(false); menu.findItem(R.id.menu_logout).setVisible(true); } else { menu.findItem(R.id.menu_login).setVisible(true); menu.findItem(R.id.menu_logout).setVisible(false); } return true; }
This example changes the visibility of the login/logout menu items based on whether the user is currently logged in or not.
This example sets up a search menu item with a SearchView widget and sets a listener to handle user input.
The android.app.Activity package is the library for implementing activities in an Android application.
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