when I click on the back press on real device it went to the home page not to the previous page ,here I am Using fragments how to solve that issue
In First Fragment
NotesFragment notes = new NotesFragment();
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.day_fragment_mainLayout, notes);
transaction.addToBackStack(null);
transaction.commit();
in Second Fragment
DayFragment day = new DayFragment();
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.addToBackStack(null);
transaction.replace(R.id.day_fragment_mainLayout, day);
transaction.commit();
in Third Fragment
ItemsFragment items = new ItemsFragment();
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.addToBackStack(null);
transaction.replace(R.id.day_fragment_mainLayout, items);
transaction.commit();
when i click on backpress button its goes to the home page,bt i need prevoius page.
note: btnclick i am using to navigating fragments one to one
You could achieve it by using FragmentTransaction's add() method, and then override onBackPressed where you have to pop your FragmentManager's back stack. This will result in the behaviour you described.
You cannot go back because you didn't open any new activity. OnBackPressed is moving you to the previous activity stored in the stack. If you want to go back to the previous fragment, you have to store the previous fragment somewhere and then use:
#Override
public void onBackPressed() {
// here you should change the fragment
transaction.replace(YOUR_PREVIOUS_FRAGMENT, items);
transaction.commit();
}
Thanks for attention!
Related
I am having trouble going back to previous fragment on backpress from current fragment.
I have Two fragments and i navigate to second fragment on click and when i try to click back from the second fragment, i want to go back to the previous fragment but instead the app exits on backpress. below is the code i am using..
Fragment1 calling second fragment
UserFragment frag = new UserFragment()
FragmentTransaction transaction = getFragmentManager().beginTransaction();
frag.setArguments(bundle);
transaction.addToBackStack("UserActivity");
transaction.replace(android.R.id.content, frag, "UserActivity").addToBackStack(null);
transaction.commit();
In second Fragment i have implemented an interface OnBackpress and over riding the below method
#Override
public void onBackPressed() {
if (getFragmentManager().getBackStackEntryCount() != 0) {
if(getFragmentManager().findFragmentByTag("UserActivity") != null){
Log.e("UserActivity",getFragmentManager().findFragmentByTag("UserActivity").toString());
getFragmentManager().popBackStack();
};
}
}
But on back press the app exits. Instead i want to go back to previous fragment. What mistake am i doing? please help. thanks
You need to add you first fragment to back stack properly, you are doing it wrong in your first part of the code.
Use the following code instead.
UserFragment frag = new UserFragment()
FragmentTransaction transaction = getFragmentManager().beginTransaction();
frag.setArguments(bundle);
transaction.addToBackStack("UserActivity");
transaction.replace(android.R.id.content, frag, "UserActivity");
transaction.commit();
Also there is no need to add any code in your onBackPressed after above change.
First, you need to add your fragments to the backstack:
public static void addFragment(FragmentManager fragmentManager, Fragment fragment, int id){
fragmentManager.beginTransaction().add(id, fragment).addToBackStack(null).commit();
}
Then you need to override the onBackPressed, which is a method gets called whenever a user clicks the back button:
#Override
public void onBackPressed() {
super.onBackPressed();
if(getSupportFragmentManager().getBackStackEntryCount() == 0){
button.setVisibility(View.VISIBLE);
}
}
please change to add() instead of replace() in your code..
UserFragment frag = new UserFragment()
FragmentTransaction transaction = getFragmentManager().beginTransaction();
frag.setArguments(bundle);
transaction.addToBackStack("UserActivity");
transaction.add(android.R.id.content, frag, "UserActivity").addToBackStack(null);
transaction.commit();
This will solve your problem.
Hi Following my code to show detail fragment from list fragment
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.FragmentContainer1, DealFragment.newInstance(dealItems, position, currentPage, totalCount)).addToBackStack(null).commit();
Now when I press back button I get new ListFragment.ListFragmnt state is not saved.
I referred to some stack questions but haven't got right answer
I tried below code but it causes issues when app goes in background and is killed by system(Like I am opening chrome from my detail view and when I go back from chrome my app is closed and minimised) FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
ft.hide(getActivity().getSupportFragmentManager().findFragmentById(containerId));
ft.add(containerId, detailFragment);
ft.addToBackStack(null);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.commit();
Any solution on this problem when I move to ListFragment to detail hot maintain state of detail fragment.
I have referred this link from stack overflow here is the link
I want functionality same as Gmail app when we go from list to detail and come back to list fragment. Scroll position and everything is maintained which is not happening in my case
Try this :
#Override
public void onBackPressed() {
if (getSupportFragmentManager().getBackStackEntryCount() > 0) {
getSupportFragmentManager().popBackStack();
} else {
this.finish();
}
}
In your activity set the first fragment:
ListFragment listFragment = new ListFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.add(R.id.FragmentContainer1, listFragment );
transaction.addToBackStack(null);
transaction.commit();
Then in listfragment call details fragment:
DetailFragment detailFragment = new DetailFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.FragmentContainer1, detailFragment);
transaction.addToBackStack(null);
transaction.commit();
When I click on the back icon in the layout then it goes to previous fragment but it doesn't go to the fragment it was killed. what is the solution for this?
I'm using finish() and backstack but it not works for me
back.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
android.support.v4.app.Fragment onlineFragments = new OnlineFragments();
android.support.v4.app.FragmentManager fragmentManagerprofile = getActivity().getSupportFragmentManager();
android.support.v4.app.FragmentTransaction fragmentprofileTransaction = fragmentManagerprofile.beginTransaction();
fragmentprofileTransaction.replace(R.id.background_fragment, onlineFragments);
fragmentprofileTransaction.commit();
}
});
Fragment A
case R.id.recharge:
HomeActvity.toolbar.setVisibility(View.GONE);
android.support.v4.app.Fragment Recharge = new Prepaid_recharge();
android.support.v4.app.FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
android.support.v4.app.FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.containerView, Recharge);
fragmentTransaction.commit();
break;
Whenever your making Transactions between fragments and you want to navigate back to the previous fragment(s) (Back Button), in the transaction, you must add this transaction to the backStack before committing:
Android docs:
"Before you call commit(), however, you might want to call addToBackStack(), in order to add the transaction to a back stack of fragment transactions. This back stack is managed by the activity and allows the user to return to the previous fragment state, by pressing the Back button."
https://developer.android.com/guide/components/fragments.html#Transactions
// Create new fragment and transaction
Fragment newFragment = new ExampleFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack
transaction.replace(R.id.fragment_container, newFragment);
transaction.addToBackStack(null);
// Commit the transaction
transaction.commit();
I use this code to add and remove the fragment. In case I do not need that fragment to be in the back stack I send the boolean value as false. Doing this when pressing back button from toolbar It open the correct activity
public static void changeFragment (MyActivity activity, Fragment fragment, int fragmentContainer, boolean addToBackStack){
FragmentManager fragmentManager = activity.getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(fragmentContainer, fragment);
/*here we keep track of fragments and avoiding last blank fragment by passing true*/
if(addToBackStack){
fragmentTransaction.addToBackStack(null);
}
fragmentTransaction.commit();
}
Hi I have 5 fragments Now first time when I go to Activity of that fragments then default First fragment is called,then on first Fragment there is a button by clicking that button I go to the second fragment,similarly in Second fragment There is a button and clicking that button I go to the third fragment and so on.
Now My Question is that Current I am on Fifth fragment ,Now I want to go fifth fragment to second fragment,what should I do for this?
Can any one please tell me?
You can pop the fragment by name. While adding fragments to the back stack, just give them a name.
fragmentTransaction.addToBackStack("frag2");
Then in fragment5, pop the back stack using the name ie.. frag2 and include POP_BACK_STACK_INCLUSIVE
someButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
FragmentManager fm = getActivity()
.getSupportFragmentManager();
fm.popBackStack ("frag2", FragmentManager.POP_BACK_STACK_INCLUSIVE);
}
});
Here is the method to add and replace fragment.
public void addReplaceFragment(Fragment fragment, int addOrReplace) {
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
switch (addOrReplace) {
case addFragment:
transaction.add(R.id.frame_containerforsearchable, fragment);
transaction.commit();
break;
case replaceFragment:
transaction.replace(R.id.frame_containerforsearchable, fragment);
transaction.commit();
break;
default:
break;
}
}
call of fragment is..
addReplaceFragment(currencyFragmentWithSearch, replaceFragment);
replaceFragment integer variable
currencyFragmentWithSearch Fragment instance
You can always do this :)
getActivity().getSupportFragmentManager().replace(R.id.yourFrameLayout,new Fragment2(),"FRAG2");
OR
Fragment fragment = getActivity().getSupportFragmentManager().findFragmentByTag("FRAG2");
getActivity().getSupportFragmentManager().replace(R.id.yourFrameLayout,,"FRAG2");
Try this code:
Fragment fragment = new SecondFragmentName();
FragmentManager fm = getActivity().getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.content_frame, fragment);
ft.commit();
just small correction to mudit_sen code. It is working, only if you add .beginTransaction. Thank you.
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.FrameLayoutId,new FragmentName()).commit();
I am developing an android app with lots of fragments in it. But I am facing problems in switching between them.
Lets say I have a Fragment A now I want to go to Fragment B, for this I am doing like this--
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager
.beginTransaction();
Fragment fragment = new Fragment_B();
transaction.add(R.id.frameLayout, fragment);
transaction.addToBackStack(null);
transaction.commit();
I reach Fragment B successfully. Now I have to go to Fragment C from here, for this again I am doing the same thing.
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager
.beginTransaction();
Fragment fragment = new Fragment_C();
transaction.add(R.id.frameLayot, fragment);
transaction.addToBackStack(null);
transaction.commit();
I do this successfully also. Now I have to revert back to Fragment B, for this I do -
getFragmentManager.popbackstack();
This brings me back to Fragment B. But when I do the same to go to Fragment A now, it causes NullpointerException.
What I am doing wrong here. Why does this run perfectly for the first time but fails at the second time? Please help.
I think you have to check first there are fragment available in backstack or not. follow my below code:
if(manager.getBackStackEntryCount()>0){
manager.popBackStack();
manager.beginTransaction().commit();
}
Thats it...
and yes you do not add fragment a to backstack initally so crosscheck that..
fragmentTransaction.addToBackStack("tag");
#Override
public void onBackPressed() {
if (getFragmentManager().getBackStackEntryCount() > 1) {
getFragmentManager().popBackStack();
} else {
super.onBackPressed();
}
}