Override fun onOptionsItemSelected(item: MenuItem) = when (item.Changing Action Bar Icons dimension is a very hard task until you find out how? If the method does not recognize the user's action, it invokes the superclass Matches the value you declared in the corresponding įor example, the following code checks to see which action the user selected. Implementation of onOptionsItemSelected(), call the MenuItem.getItemId() method to determine which item was pressed. When the user selects one of the app bar items, the system calls yourĪctivity's onOptionsItemSelected() callback method, and passes a MenuItem object to indicate which item was clicked. You can find many useful icons on the Material Icons page. The system uses the action's icon as the action button if the action isĭisplayed in the app bar. Overflow menu, not displayed in the app bar. If you setĪpp:showAsAction="never" (as in the example code's settings action), the action is always listed in the If there is room in the app bar for it if there is not enough room, excessĪctions are sent to the overflow menu. If you setĪpp:showAsAction="ifRoom" (as in the example code's favorite action), the action is displayed as a button Should be shown as a button on the app bar. The app:showAsAction attribute specifies whether the action An app bar with a single action button and anĪll action buttons and other items available in the action overflow areĪdd actions to the action bar, create a new XML file in your project'sĮlement for each item you want to include in the action bar, as shown in this The app can also specify that an action should alwaysīe shown in the overflow menu, instead of being displayed on the app bar.įigure 1. If an app declares more actions than canįit in the app bar, the app bar send the excess actions to an Their photo roll when the user looks at an individual photo, the app might For example, a photo browsing app might show shareĪnd create album buttons at the top when the user is looking at
Put the most important actions for the current context right at the The app bar allows you to add buttons for user actions.
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