Whenever i create a new activity from the Android Studio template, it creates two XML layout files: activity XML layout that includes other content XML layout. Is there any benefit to doing that? I only found that my layout folder going to grow twice because of that.
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How can I show a layout.xml design on an activity? Say If I have a layout.xml file on external storage on android. If I want to show the full design of layout.xml file on some specific view group (say linear or relative layout) inside my activity of android app at runtime. If anyone can provide example to show any kind of layout.xml file's design on an activity.
While creating any activity(other than empty) in android studio it is creating only activity xml, using Android Studio 3.1.4, Kindly help.
Empty activity default contains only a single layout file
Read this
Activity template
This template creates an empty activity and a single layout file with sample text content. It allows you to start from scratch when building your app module or activity.
But you can create the content layout separately then include into the main activity.
As my understanding, the activity_main xml file created by wizard is the content xml file when create Basic Activity.
Then you could modify the activity_main xml to fulfil your requirment.
According to the documentation of Android Studio, activity_main.xml will affect how global UI of Activity is designed and works. But content_main.xml will affect the contents in the activity_main.xml.
Since a Basic Activity,Empty Activity doesn't have much content, thus the content_main.xml is not created for those. If you create a Navigation Drawer Activity, Studio will create both app_bar_main.xml , content_main.xml and activity_main.xml
Whenever I make an activity, Android studio creates two xml files. If I name it main, I get activity_main.xml and content_main.xml. What is the advantage of doing this? And what should I put in activity_main vs content_main?
The content.xml file gets included into the activity's xml file, so for one its reusable in multiple activities or fragments also you can manage your concerns better in smaller units which is also a good thing.
I am learning android framework. I see these three get added when I add a new Blah.java basic activity. I would like to know what is the purpose of each one of it?
activity.xml
This xml file is design view of your activity. Its for designing purpose and also thats front end of screen view.you can design xml by using android layout and widgets.
fragment.xml
This xml file is design view of your fragments.
content.xml
Thats also part of activity.xml design file .we can access/use it from others xml file by using include
<include layout="#layout/content"/>
This are the layout xml for your android app, activity refers to your class, if you are using any fragment in your app then you should have one fragment.xml.
content is something which is optional, you can create anything inside content and then you can include that in both fragment and activity xml.
I am presuming you are using an IDE (Android Studio), which has this great advantage of generating layout files while creating Activities in android.
Now layout files (.xml) files are used for generating views, while creating an activity you are given a option (in IDE) whether you want to create a fragment for the activity.
For each of them the activities and fragments there will be a layout file and based on your activity/fragment name the layout files name will be generated (which can be edited)
In your case:
activity_blah.xml and content_blah.xml are the layout files generated for the blah.java activity file, you can add view components in the layout files for user interface of the activity
fragment_blah.xml is generated for fragment.
Since the latest changes, the main activity has an activity_main.xml and a content_main.xml.
I'm creating a new activity now in the same project but no matter how I create it, I can't get Android Studio to create both xml files for the new activity. This means that I can't remove the toolbar unless I do so programmatically. That's fine by me.
Ultimately, I'm just wondering if I should create both xml files for the second activity.... like:
activity_notmain.xml
content_notmain.xml
or should I just create the one layout file and remove the toolbar programmatically?
just right click on res>layout and go to new>activity>blank activity then enter name for activity and layout file it will automatically create both activity and content xml file