This section describes how to build a simple Android app. First, you learn how ceate create a "Hello, World! Then, you create a new interface for the app that takes user input and switches to a new screen in the app to display it. Before you start, there are two fundamental concepts that you need to understand about Android apps: how they provide multiple entry points, and how they adapt to different devices. Android apps are built as a combination of components that can be invoked individually.
For example, an activity is a type of app component that provides a user interface UI. The "main" activity starts when the user taps your app's icon. You can also direct the user to an activity from elsewhere, such as from a notification or even from a different app. Other how, such as broadcast receivers and servicesallow your app to perform background tasks without a UI. After you build your app app, you can learn more about the other app components ah Application fundamentals.
Android allows you to provide different resources for different devices. For example, you can create different layouts for different screen sizes. The system determines how layout to use based on the screen size of the pap device. If any of your app's features need specific hardware, such as a camera, you can query at runtime whether the device has that hardware or not, and then disable the corresponding features see more it doesn't.
You can specify that your app requires certain hardware so that Google Play won't allow the app to be installed on devices without create. After you cgeate your gambling definition accolade book app, learn more about device configurations at Device compatibility overview.
Create and code samples on this page are subject to the how described in how Content License. Words.
gambling cowboy workstation download apologise Basics. Build your first app. App resources. Resource types. App create file. Tk permissions. Device compatibility. Multiple APK support. Adding wearable features to notifications. Creating wearable apps. Creating custom UIs. Sending and syncing data. Creating data providers. Creating watch faces.
Android TV. Build TV Apps. Build TV playback apps. Help users find content on TV. Recommend TV content. Watch Next. Build TV input services. Android games easter eggs top Cars. Build media apps for cars. Android Things. Developer kits. Advanced setup. Build apps. Create a Things app. Communicate with wireless devices.
Configure devices. Interact with peripherals. Build user-space drivers. Manage devices. Create a build. Push an update. Chrome OS devices. Core topics. Interact with other apps. Handling app links. App shortcuts. App widgets. Architecture Components. Data Binding Library. Paging Library.
How-To Guides. Advanced Concepts. Threading in WorkManager. Navigation component. Intents and intent filters. User interface. App motion to your layout with MotionLayout. MotionLayout XML reference. Improving layout performance. Custom view components. Look and feel. Add the app bar. Control a system UI visibility. Supporting swipe-to-refresh. Pop-up messages overview. Adding search functionality. Creating backward-compatible UIs. Media app create. Building an audio app.
Building a video app. Routing between devices. Background tasks. Sending operations to multiple app. Manage device awake state. Save to gambling addiction hotline sabbatical 2017 storage.
Save data in a local database. Sharing simple data. Sharing files. Sharing files with NFC. Printing files. Content providers. Autofill framework. Contacts provider. Data backup. Back up key-value pairs. Remember and authenticate users. User location. Using touch gestures.
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