#Android studio fragment example code

Inside the click event function, I added required code lines to open the targetted fragment.

#Android studio fragment example how to

You can check how to add click events to buttons from here. First I created a button for each fragment. Now let’s try to open the second fragment from the first fragment and travel back again to the first one. this.getSupportFragmentManager().beginTransaction().replace(R.id.content_main, new FirstFragment()). We can get the same output by adding the below line of code to the same function. However, there are shorter ways to do this. Then I have replaced the layout file of MainActivity, which has the ID of ‘content_main’ with the FirstFragment. Then I have created an instance of ‘FragmentManager’ and an instance of ‘FragmentTransaction’ using it. Here I have created an instance of the ‘FirstFragment’ first. FristFragment firstFragmentInstance=new FirstFragment() FragmentManager firstFragmentManager=getSupportFragmentManager() FragmentTransaction firstFragmentTransaction=firstFragmentManager.beginTransaction() firstFragmentTransaction.replace(R.id.content_main,firstFragmentInstance,”first_fragment_tag”).addToBackStack(null).commit()

You can do it by adding the following lines of codes to the ‘onCreate’ function of MainActivity’s java file. So let’s make our FirstFragment’s layout appear at the start of the application instead of MainActivity’s layout. Even though you add fragments to the app, they won’t appear until you make them appear. Of ‘onCreateView’ function to View v= inflater.inflate(R.agment_first, container, false) return v įor the easiness of handling functionalities inside a fragment page. Then you need to change the return inflater.inflate(R.agment_first, container, false) So for the time being let’s remove some unwanted functions and keep it simple. You will see a lot of functions in your newly created fragment file. You only need to add a line similar to ‘android: to the beginning tag of each XML file. I gave IDs as ‘content_main’,’fragment_first’ and ‘fragment_second’ to 3 XML layout files respectively. We have 3 XML files for each Activity/Fragment, ‘MainActivity’, ‘FirstFragment’ and ‘SecondFragment’. Then, it’s better to give IDs to all XML layout files. I named them as ‘FirstFragment’ and the ‘SecondFragment’.