Develop Reference

Android: Hide viewPager tabs when launching a fragment from one of the viewPager tab fragment

I have a viewPager in my app which has several tabs. In some of the tabs, on clicking an item a new fragment is shown. I want this fragment to cover the tabs. Doing this is possible but the approaches don't look good to me.
1.) one way is that I add the newly created fragment to the activity using getSupportFragmentManager(). This solves the problem but doesn't look like a good idea as it will create problems when using back button etc.
2.) Other way is to hide the tabs manually using Visibilty.GONE but problem with this approach is that this hiding of the tabs is visible, I mean the animation could be seen and looks bad.
Is there a better approach to do this problem?
This is my code. "sub_fragment_container" is present in the activity xml, so I get an error java.lang.IllegalArgumentException: No view found for id 0x7f0e00ff (com.my.app:id/sub_fragment_container) for fragment DetailFragment{
FragmentTransaction fragmentTransaction = getChildFragmentManager()
.beginTransaction();
Fragment profileFragment = new DetailFragment();
profileFragment.setArguments(bundle);
fragmentTransaction
.add(R.id.sub_fragment_container, profileFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();

Use android:animateLayoutChanges="true"
Or, to fine tune it further, here's a tested method that I've personally used in my app Newslet to solve the exact same problem.
Wrap your Toolbar and TabLayout within an AppBarLayout. This should be easy if you're aware of the Design Support Library. If not, this should get you started.
Add this piece of code in your onCreate():
LayoutTransition layoutTransition = new LayoutTransition();
layoutTransition.setDuration(200);
layoutTransition.setStartDelay(LayoutTransition.CHANGE_APPEARING, 0);
layoutTransition.setStartDelay(LayoutTransition.APPEARING, 0);
layoutTransition.setStartDelay(LayoutTransition.DISAPPEARING, 0);
layoutTransition.setStartDelay(LayoutTransition.CHANGE_DISAPPEARING, 0);
appBarLayout.setLayoutTransition(layoutTransition);
After this, when you remove the Tabs or add it back, the layout change will animate smoothly.
Hope this helped you!

Android Fragment overlapping each other and showing transparent view

I have an activity with a fragment container layout and in that layout i load a fragment A which has a listview (listview loads data from web). Now on clicking listview item i want to show detail view. For that i am loading another fragment B which is detail fragment. Now to do that first i used
FragmentTransaction ft = ((FragmentActivity) context).getSupportFragmentManager().beginTransaction();
ft.replace(R.id.fragmentsContainerLayout, new ScheduleDetailsFragment());
ft.addToBackStack(null);
ft.commit();
But using replace remove the previous fragment A which contain listview and on pressing back it again reloads the onCreateView method of fragment A and its listview data. I want to prevent it from loading fragment A again (or sending call to webserver) on backpress. I want to maintain fragment A state and its listviews scroll position. To do that i used second option which is
FragmentTransaction ft = ((FragmentActivity) context).getSupportFragmentManager().beginTransaction();
ft.add(R.id.fragmentsContainerLayout, new ScheduleDetailsFragment());
ft.addToBackStack(null);
ft.commit();
If i use add() then Fragment B loads on top of Fragment A and Fragment A still visible. It shows both fragments overlapping each other and transparent. I also came across anothe solution which is to use show() and hide() methods. But i dont think that is an efficient way to achieve that. Can anyone suggest an effective solution?

Add fragments into a Fragment Activity

I have a FragmentActivity that contains a FrameLayout. I use the following code to add Fragments to the Fragment Activity.
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.add(R.id.fragment_content, fragment, fargmentTag);
ft.addToBackStack(null);
ft.commit();
Now R.id.fragment_content is FrameLayout. This adds a Fragment onto the view. But the underlying view still remains visible. Meaning the one lying view is seen through the new fragment ? What am i doing wrong.
Kind Regards

for the next fragment use ft.replace(); so the previous one will be repalced.

Either ft.remove() the old fragment, or use ft.replace() instead of ft.add().

ft.replace() should work fine, otherwise you have to update your question for a better understanding.

Using ft.replace will replace any previously added fragment with this fragment but if the activity has some view added to its layout rather than a fragment ,then the fragment added through add or replace will show its content over it rather than replacing it as it is not a fragment.
either add another layout within your main layout and assign it some id and then add the fragment to that container.
Hope it helps.

android - Keep same action bar for all fragments

I have developed an android application by extending to FragmentActivity. Everything works exactly as it done. I have put NAVIGATION_MODES as TABS. I have a LISTVIEW inside TAB A of FRAGMENT A. When the user clicks on LISTVIEW ITEM, new Fragment/ACTIVITY should launch showing the same ACTION BAR and same TABS. How can I achieve this.
Please suggest any methods.
Thanks

Get the container of the current Fragment A with the ListView and replace the Fragment inside
so in the onclick method of the listview adapter:
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(FragmentA.this.getParent().getID(), mNewFragment);
ft.addToBackStack(null);
ft.commit();
since FragmentA.this.getParent().getID() is very clunky, search for the ID of the Container where FragmentA is located in, and use it instead. R.id.FragmentAContainerID

Android - adding fragments dynamically

I have looked around the internet and I have found only examples of Android fragmens, where they are placed on place (like two of them, one as a list, second is diplaying details of a selected item from list). My goal is to have classic android activity and I want to be able to add to it dynamically pre-prepared fragments with particular GUI. I want to add there dome group of EditText elements (editTextFragment), or several radiobuttons (radionbuttonFragment). Is there any example of how to do that? Making stable fragments is not usable for me.
Thanks

This answer is for those who all searching the answer for same question.
The answer is achieved by FragmentManager and FragmentTransaction with the following syntax.
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
then you need to add your fragment to this fragmentTransaction with the following syntax.
fragmentTransaction.replace(R.id.detailFragment, layout1);
And finally you MUST commit your transaction. Otherwise changes will not persist.
fragmentTransaction.commit();

Fragment and views are very similar so think similar... Also look at google api demoes for fragments. If I remember correctly they use a framelayout and adds fragments to it.

You can add and remove fragments to a FrameLayout in an activity's UI programmatically but your activity must extend FragmentActivty. Once you have created fragment classes and corresponding layouts, instantiated fragments can be added and removed via the FragmentManger and FragmentTransaction. See the section "Performing Fragment Transactions" in the Fragment documentation.