I have three fragments (fragmentA, fragmentB, FragmentC). The code goes from fragmentA to fragmentB and then fragmentB to Fragemnt C.
When I press the back button I go from fragmentC to fragmentA.
After the back button is pressed fragmentA is displayed but you can also see fragmentC behind it.
fragmentA
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction;
ft.repalce(R.id.container, fragmentB)
.addToBackStack("Null")
.commit();
fragmentB
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction;
ft.repalce(R.id.container, fragmentC)
.commit();
fragmentC
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction;
ft.repalce(R.id.container, fragmentC)
.commit();
When the back button is pressed I want to go from fragmentC to fragmentA and not have fragment C displayed in the background
In addToBackStack use null as param , not "Null"
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction;
ft.repalce(R.id.container, fragmentB)
.addToBackStack(null)
.commit();
you can try this when replacing fragment
Fragment frag=null;
frag=new Navigation_Help();
if(frag!=null){
FragmentManager fragmentManager=getSupportFragmentManager();
FragmentTransaction ft=fragmentManager.beginTransaction();
ft.replace(R.id.sacreenarea,frag);
//for not to back previous fragment remove next nile
ft.addToBackStack(null);
ft.commit();
}
I tried using #ADM duplicate link, it would take me to the fragment A but if I loaded fragment B for a second time I would get double commit errors.
The solution that works for me is to restart the activity with the #Override onBackPressed(), this will reload the fragmentA by default.
Fragment B
FragmentManger fm = fragmentManager();
FragmentTransaction ft = fm.beginTransaction();
fm.replace(R.id.container, fragmentC, "fragmentC");
.commit();
fragmentC backbutton pressed
Activity
#Override
public void onBackPressed() {
if(getSupportFragmnetManager().findFragmnetByTag("fragmentC") !=null) {
Intent myIntent = new Intent(this, Activity.class);
startActivity(myIntent);
finish();
} else {
super.onBackPressed();
}
}
This solution will only work if you want to go back to the first fragment loaded by the Activity, so it may not be the best solution out there but it worked for me.
Related
I have three fragments a, b, c
I replace a with main activity
FragmentManager fm = getFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
transaction.add(R.id.fram_container, new Fragment1(), "tag1");
transaction.commit();
a to b
FragmentManager fm = getFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
transaction.replace(R.id.fram_container, new Fragment2(), "tag2");
transaction.commit();
and b to c
FragmentManager fm = getFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
transaction.replace(R.id.fram_container, new Fragment3(), "tag3");
transaction.commit();
in c...
I want c back pressed to redirect with a without anything doing in c
I want skip b in back pressed.
What can I do and how?
Implement the below code back press
public void backToFragment(final Fragment fragment) {
// go back to something that was added to the backstack
getSupportFragmentManager().popBackStackImmediate(
fragment.getClass().getName(), 0);
// use 0 or the below constant as flag parameter
// FragmentManager.POP_BACK_STACK_INCLUSIVE);
}
I have coded like this:
FragA >> FragB >> FragC >> FragD
When I press onBackpress() of FragD it goes to directly on FragA but i want to keep it go FragC.
BackPress Code here :
if (getActivity().getSupportFragmentManager().getBackStackEntryCount() > 0) {
back_btn.setVisibility(View.GONE);
getActivity().getSupportFragmentManager().popBackStack();
}
Replacing Fragment Code :
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
FragmentA fragmentA = new FragmentA();
fragmentTransaction.replace(R.id.framelayoutinner, fragmentA);
fragmentTransaction.addToBackStack("fragmentA");
fragmentTransaction.commit();
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
FragmentA fragmentB = new Fragmentb();
fragmentTransaction.replace(R.id.framelayoutinner_2, fragmentB);
fragmentTransaction.addToBackStack("fragmentB");
fragmentTransaction.commit();
You are using nested fragments, if you load fragment from another fragment then it become nested structure. So try to check if any child fragment exist within your Root fragment then pop that child fragment first.
Use getChildFragmentManager() for that and make recursive calls till you get most young child fragment(Last added). Or better use Tag on your fragments.
You need to add every fragment into backstack using addToBackStack method
public void setmFragmentContainer(Fragment fragment)
{
final String tag = fragment.getClass().getName();
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.layout_content, fragment, tag);
transaction.addToBackStack(tag);
transaction.commit();
}
This method may help you
I'm trying to implement the following fragment design:
Fragment A is replaced by fragment B, which in turn, is replaced by fragment C.
Whether in fragment B or C, I want the user back navigation to take it back to fragment A.
I add to backstack when replacing A with B. But when I move from B to C, I don't add to backstack.
When navigating back from fragment B, everything works fine.
But, when navigating back from C, I get A and C on the same screen - C doesn't disappear.
I wonder if it is related to my backstack usage.
Any help is appreciated.
My code is equivalent to:
Fragment fragment;
fragment = new FragmentA();
transaction.replace(R.id.container, fragment);
transaction.commit();
fragment = new FragmentB();
transaction.replace(R.id.container, fragment);
transaction.addToBackStack(null);
transaction.commit();
fragment = new FragmentC();
transaction.replace(R.id.container, fragment);
transaction.commit();
This is the general way to add to Backstack. Use tags.
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
Fragment1 fragment1 = new Fragment1();
fragmentTransaction.replace(R.id.fragment_container, fragment1, Fragment1.class.getName());
fragmentTransaction.addToBackStack(Fragment1.class.getName());
fragmentTransaction.commit();
Now similarly, for frament2:
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
Fragment2 fragment2 = new Fragment2();
fragmentTransaction.replace(R.id.fragment_container, fragment2, Fragment2.class.getName());
fragmentTransaction.addToBackStack(Fragment2.class.getName());
fragmentTransaction.commit();
Do the same for fragment3.
And now you remove fragment2 from backstack using:
getFragmentManager().popBackStack(
Fragment2.class.getName(),
FragmentManager.POP_BACK_STACK_INCLUSIVE);
You should be able to skip directly from fragment3 back to fragment2.
Also, are you using fragmentTransaction.replace(...) and not fragmentTransaction.add(...). Could you post relevant code?
i have 2 fragments A and B in my application.
the mainactivity starts up with fragment A. on pressing a button in it i replace it with fragment B.
FragmentManager fm = getSupportFragmentManager();
B_Fragment pfrag = new B_Fragment();
pfrag.setArguments(args);
fm.beginTransaction().replace(R.id.frag_container, pfrag)
.addToBackStack("A_Fragment").commit();
Now in fragment B i press a button to replace it with fragment A using:
fm.popBackStack();
fm.beginTransaction().addToBackStack("B_fragment").commit();
Fragment A is successfully pushed and popped from the stack where as fragment B is not.
Every time B_fragment is been destroyed and a new one is created.
So can someone tell me what i am missing and how to push fragment B onto the stack and pop A out at the same time.
FragmentManager fm = getSupportFragmentManager();
B_Fragment pfrag = new B_Fragment();
pfrag.setArguments(args);
fm.beginTransaction().replace(R.id.frag_container, pfrag).commit();
On Fragment B, why don't just replace it with Fragment A
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.pnlLeft, details);
ft.commit();
popBackStack does not load the last fragment, it's commonly used to pop the entire stack :
fragmentManager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
before loading another fragment
beginTransaction()
replace() Or add()
commit()
When you press the button in Fragment B, try the below code. This will re-load the entire fragment.
FragmentManager fm = getSupportFragmentManager();
if (fm.getBackStackEntryCount() > 0) {
fm.popBackStack();
}
I want to do the following. There are two fragments first and second. Necessary make the transition between them. When I go from first fragment in the second, first stored in the stack. When I click the Back button the second fragment is removed and returned first fragment from the stack. Again I can not go in the second fragment - it has been deleted. How can I solve this problem?
In main activity (callback for Fragment1):
#Override
public void onNavigate() {
FragmentTransaction ft = getFragmentManager().beginTransaction();
Fragment1 newFragment1 = (Fragment1) getFragmentManager().findFragmentByTag("frag_1");
Fragment2 newFragment2 = (Fragment2) getFragmentManager().findFragmentByTag("frag_2");
ft.replace(R.id.main, newFragment2);
ft.remove(newFragment1);
ft.addToBackStack(null);
ft.commit();
}
Fragments I added dynamically:
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.add(R.id.main, new Fragment1(), "frag_1");
ft.add(R.id.main, new Fragment2(), "frag_2");
ft.commit();
I solved this problem :). I hide first fragment and add transaction to the back stack. When I click button Back I return to fragment
#Override
public void onNavigate() {
FragmentTransaction ft = getFragmentManager().beginTransaction();
Fragment1 newFragment1 = (Fragment1) getFragmentManager().findFragmentByTag("frag_1");
ft.hide(newFragment1);
ft.addToBackStack(null);
ft.commit();
}