Action bar | Android Interaction Patterns | - 1 views
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The action bar: is located at the top of the screen to support navigation and highlight important functionalities replaces the title bar (which is often included into it) is best used for actions across your app, like search, refresh and compose can provide a quick link to app homeby tapping the app logo is preferably not contextual, but actions can differ from page to page
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Use when You want to bring key actions on screen, so they are in sight. You don't want to hide them under the menu-button. The action bar is best used for common actions like search, refresh and compose. When screen real estate is valuable, consider putting actions in the options menu.
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