This file enhance the reusability of the code.īelow we show strings.xml file and define a string in the file. We define all the strings in this xml file and then access them in our app(Activity or in Layout XML files) from this file. Strings xml File(strings.xml): This xml file is used to replace the Hard-coded strings with a single string. It is located inside app > manifests folderĭefining Internet Permission in AndroidManifest.xmlīelow we show the AndroidManifest.xml file and define the Internet Permission in that file. For Example – Suppose we need to use internet in our app then we need to define Internet permission in this file. It includes the names of our application packages, our Activities, receivers, services and the permissions that our application needs. Manifest xml File(Mainfest.xml): This xml is used to define all the components of our application. You will find out this file inside the res folder and inside it there is another folder named layout where you will get all the layout files for their respective activities or fragments.īelow we show activity_main.xml file in which we have two TextView’s. Like the TextView’s, Button’s and other UI elements. It holds all the elements(views) or the tools that we want to use in our application. Layout XML Files: Layout xml files are used to define the actual UI(User interface) of our application.
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In Android there are several xml files used for several different purposes. The different types of layout in android are Linear Layout, Relative Layout, Absolute Layout, Table Layout and Frame Layout. Layouts are the best examples for ViewGroups. These are contained inside the ViewGroup. Paste it in activity_main.xml: Įvery Android application screen has some components like button, Text or images.
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The below code snippet will explain the above image in better way. It is important to note that one layout can be nested in another layout. 2 EditText ) are nested inside Relative Layout ViewGroup. Relative Layout)and two View( Button and TextView). Here in above Diagram ViewGroup ( Linear Layout) contains one ViewGroup (i.e. One ViewGroup can have another ViewGroup as an child element as shown in the figure given below: These child views are other widgets which are used to make the different parts of UI. A ViewGroup is an invisible container that organizes child views. The whole concept of Android User Interface is defined using the hierarchy of View and ViewGroup objects.
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