Using constraint layout, you can create flat layouts. Like any other layouts in android, constraint layouts also can be created in code or defined in xml.
Constraint layout was introduced to solve alignment and performance issues of previous layouts. It is similar to relative layout in that widgets are positioned relative to siblings or parent.
Android app user interface can be defined either in xml or in code and android UI consists of hierarchy of views and view groups
How to test android apps on usb connected device in android studio.
With facebook deep linking, clicking a shared link in facebook post takes the user directly to the content view in your app.
When user clicks a link in an android app or app fires web URI intent in response to some events in app, android system matches the intent to the target app using app links.
Android users can view more than one app at the same time with new multi-window display feature introduced in Android 7.0, API level 24.
Facebook provides SDK for android integration using that you can easily provide facebook login option in your android apps so that users can use their facebook account and login to your app.
Steps to implement google sign-in option in android apps and steps to authenticate with server.
Android provides sync adapter framework which enables apps to create components to sync data between web server and device in the back ground.
If your app functionality needs to access protected online services or resources of users in order to provide certain features in your app, your app can do so by getting auth token of user account from account manager and using it.
To eliminate the need for apps to prompt users for login into online accounts every time apps need to access online services, android system provided account manager. This post helps you understand concepts and components involved in creating your own account type managed by android system account manager.