![]() ![]() The app bar may also include the Up button for navigating up to the parent activity. The app bar by default shows the app title, or the name defined in AndroidManifest.xml by the android:label attribute for the Activity. When you create an Activity from a template (such as Empty Template), an app bar is automatically included for the Activity. The app bar (also called the action bar) is a dedicated space at the top of each Activity screen. Example of a popup menu: the Gmail app anchors a popup menu to the app bar for the message view with Reply, Reply All, and Forward. Popup menu: Appears anchored to a View such as an ImageButton, and provides an overflow of actions or the second part of a two-part command.Examples of menu options: Edit, Share, and Delete for one or more selected elements. Contextual action bar: Appears at the top of the screen overlaying the app bar, with action items that affect the selected element or elements.Examples of menu options: Edit to edit the element, Delete to delete it, and Share to share it over social media. Contextual menu: Appears as a floating list of choices when the user performs a long tap on an element on the screen.Examples of menu options: Search to perform a search, Share to share a link, and Settings to navigate to a Settings Activity. Options menu: Appears in the app bar and provides the primary options that affect use of the app itself.The figure below shows the types of menus that the Android system offers. The user can select from a menu to perform a function, for example searching for information, saving information, editing information, or navigating to a screen. When we open our weather app again, we can see that the app icon has been updated.Lesson 3: Testing, debugging, and using support librariesĪ menu is a set of options. You can do this by hitting Play on Android Studio or, of course, using for an Android on the terminal. Finally, all that's left to do is to rebuild the Android app. We can also see that all the icons we opened earlier have been replaced with our custom icon. We can preview all the icons that are about to be created, and if we're happy, hit Next and then Finish to create them. We go back to Figma and copy the exact value of the background color and paste it into the color selector. ![]() For the background layer, we could choose another image asset if we wanted to, but in this case, it might be more prudent to use a hex value. Handily enough, you'll be able to scale the image to be larger or smaller as the designs require. Going back to Android Asset Studio, we can choose the path of the foreground layer to be the icon we've just downloaded. We select just the layer that contains the sun and the cloud, make it exportable and download it as a PNG. Looking at a design for our weather app icon, we have the sun peeking out from behind a cloud in a blue sky. We can use this Android Asset Studio to create our own launcher icon by setting the foreground and background layers. There are a couple of different icon types we can choose from here, but the one we're interested in is the Launcher Icons. Let's right click on the res directory and choose New and Image Asset. In order to replace these with our own custom app icon, we can use a tool that's built into Android Studio. ![]() Inside it, you'll find a bunch of ic_launcher files, which are used as the app icon. When we open our project in Android Studio and explore the file structure, we will find a res or resources directory. ![]() We can see that it currently doesn't have an app icon, or rather, it's still using the default Android app icon you would get when you create a new React Native project using the React Native CLI. Kadi Kraman: Here is a weather app that shows the current weather in London. ![]()
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