Develop Reference

How to replace fragment that is loaded by navigationView

I have a navigation view that loads some fragments depending on which is pressed. In one of the fragments, I want to have a button, which when it is pressed, the fragment changes from the one loaded by the navigation view to a different fragment. I have tried using
ProfileEditFragment pef = new ProfileEditFragment();
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction().remove(pef).replace(R.id.drawer_layout, pef, "Fragment")
.addToBackStack(null).commit();
When I do this, it loads the other fragment on top of the current fragment, rather than replace it, even though I used the replace function. How do I fix this?

Can you try this:
ProfileEditFragment pef = new ProfileEditFragment();
FragmentTransaction transaction =getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.drawer_layout, pef);
transaction.addToBackStack(null);
// Commit the transaction
transaction.commit();

findFragmentById on back button becomes blank as size becomes zero

Here's my Flow/Structure:
Activity
Fragment
Same Fragment within it.
I have overriden removeCurrentFragment() method which does go back functionality by removing Fragment by ID as follows -
#Override
public void removeCurrentFragment() {
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
Fragment currentFrag = getSupportFragmentManager().findFragmentById(R.id.fragment);
if (currentFrag != null)
transaction.remove(currentFrag);
transaction.commit();
}
It seems, when this happens, as ID of both fragment is same, it creates blank view.
If more details are required, please feel free to ask in comments. I will edit question as per required details.
I thought it was related to remove fragment, But I made new fragment with separate XML, still I am having the same issue.
I have parent fragment with pagination (as I need horizontal page scroll) in it have the child fragment, when clicking on child fragment button new fragment is replaced so when it is removed the X and Y of the child fragment is also disturbed.
here is the before and after screenshot of the x and y axis of child fragment.
Before
After
can any one suggest what could be the issue?

You have to use a tag to load the Fragment, and then use that same tag again to remove it.
For example, to add the Fragment:
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
fragmentManager.popBackStack(tag, androidx.fragment.app.FragmentManager.POP_BACK_STACK_INCLUSIVE);
ft.setCustomAnimations(R.anim.enter, R.anim.exit);
ft.add(containerId, fragment, tag);
ft.addToBackStack(tag);
ft.commit();
To remove it, again use the same tag:
if (fragmentManager.findFragmentByTag(currentTag) != null) {
FragmentTransaction ft = fragmentManager.beginTransaction();
ft.remove(fragmentManager.findFragmentByTag(currentTag));
ft.commit();
}

How to change the current fragment view with other fragment

How to change the whole view of a fragment with other fragment !!
Or how to close the current fragment with another fragment, please explain with layout also
Thanks in advance...

You can either add or replace fragments in your activity. Create a FrameLayout in activity's layout xml file.
Then do this in your activity to replace fragment. You can use same code each time you want to replace one fragment with other.
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.container,YOUR_FRAGMENT_NAME,YOUR_FRAGMENT_STRING_TAG);
transaction.addToBackStack(null);
transaction.commit();
If you want to add fragment instead of replace then do this:
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.container,YOUR_FRAGMENT_NAME,YOUR_FRAGMENT_STRING_TAG);
transaction.addToBackStack(null);
transaction.commit();
When you want to replace added frogment with anu other fragment then you have to remove previous fragment first (or you can hide previous fragment; depends on your requirement). See following code:
Fragment fragment = getSupportFragmentManager().findFragmentByTag(YOUR_FRAGMENT_STRING_TAG);
if(fragment != null)
getSupportFragmentManager().beginTransaction().remove(fragment).commit();
See following related questions on SO:
Difference between add(), replace(), and addToBackStack()
Basic difference between add() and replace() method of Fragment
Difference between add() & replace() with Fragment's lifecycle
Or see my answer to a similar question:
How to start Fragment from an Activity

getSupportFragmentManager().beginTransaction().replace(R.id.fragmentlayout,new fragment()).commit()
This will help you replace your existing fragment in view with id FragmentLayout with a new fragment().
ThankYou i hope this was helpful.

First you take one Framelayout in Your Activity where you add fragment.
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.framelayout,fragment_1);
transaction.addToBackStack(null);
transaction.commit();
When you replace first fragment with second one you write, just change fragment_1 to fragment_2
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.framelayout,fragment_2);
transaction.addToBackStack(null);
transaction.commit();

Retain same instance of Fragment on configuration Change

I have the following issue. My application has 2 fragments, the first one that is executed show a list of items, when you tap on an item, shows a detail fragment.
I also have a NavigationDrawerActivity, with the following methods to handle the stack of fragments.
private void changeFragment(int pos, Fragment fragment, boolean addToBackStack) {
Fragment f = getSupportFragmentManager().findFragmentByTag(String.valueOf(pos));
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction ft = fragmentManager.beginTransaction();
mCacheServices.setmFragmentTag(String.valueOf(pos));
ft.replace(R.id.container, fragment, String.valueOf(pos));
if ((addToBackStack)) {
ft.addToBackStack(STACK_KEY);
}
ft.commit();
}
The problem i am facing is when i am in the DetailFragment, and i rotete the device, it goes to the ItemList fragment, which is the firs fragment excuted by the app. What can i do to mantain on the DetailFragment when i rotate the device?
Thanks!

you can save the state of the fragment and then re-create it. Go through this for more details
http://developer.android.com/guide/topics/resources/runtime-changes.html
hope this helps.

Remove fragments from detail view

I wanted to remove fragments(stack of fragments) from a master-detail's Detail view. If i click on a list item in the master view, it opens up a fragment, if i edit the list view's item another fragment is used.
What i want to do is, remove all the fragments from the detail view changing it to a blank container, as it is when the app starts up.
Currently i am replacing the container with a blank fragment, but it does not work in few detail view cases.
NullFragment fragment = new NullFragment();
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
fragmentTransaction.replace(R.id.item_detail_container,
fragment);
fragmentManager.popBackStackImmediate();
fragmentTransaction.commit();

You can use FragmentManager.getBackStackEntryCount() to get number of fragments in backstack and use FragmentManager.popBackStack() to pop the top fragment in stack one-by-one.