Develop Reference

Issue in Fragments in android

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();
}

how to switch from one fragment to another fragment android

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();

Redirect the fragment when click on button

I am using this code for replacing the fragment but there is a problem, it's not replacing the old fragment it just override on old fragment so please tell me what is the problem here.
public void selectFrag1(View rootView) {
Fragment frag;
if (rootView == findViewById(R.id.startup1)) {
frag = new S_SignupFragment();
} else {
frag = new F_SignupFragment();
}
FragmentManager fragManager = getSupportFragmentManager();
FragmentTransaction fragTransaction = fragManager.beginTransaction();
fragTransaction.replace(R.id.fragment_signup,frag);
fragTransaction.commit();
}

Are you sure that you pass the parent view, that is going to hold your fragment on the line fragTransaction.replace(R.id.fragment_signup,frag); ?
For fragmentTransaction.replace(...,...) you need to specify a container for your fragment and the fragment itself. Check where does your R.id.fragment_signup directs. More information you could find in this SO question: Unable to replace fragment on button click

fr = new FragmentOne();
fm = getSupportFragmentManager();
fragmentTransaction = fm.beginTransaction();
fragmentTransaction.add(R.id.fragment_place,fr);
fragmentTransaction.commit();
if you use same code then add this before call first button setonclicklistner

setCustomAnimations not working on back button press

I've got this issue where transitions from fragment A to B working fine but on backPress they do not. Looking around I saw many with this issue but none of the answers seems to help me out. I must be doing something wrong but have no idea what and I would love some help, it drives me nuts!
This is my logic:
Fragment A calling fragment B:
private void loadNextFragment(WeatherComplete[] weatherDataArrayList) {
FragmentManager fm = getFragmentManager();
MainFragment mf = MainFragment.newInstance();
mf.setVars(choosenCity, weatherDataArrayList);
FragmentTransaction ft = fm.beginTransaction();
ft.setCustomAnimations(R.anim.slide_in, R.anim.slide_iout, R.anim.slide_in, R.anim.slide_iout);
ft.addToBackStack(null);
ft.replace(R.id.frame, mf);
ft.commit();
}
Fragment B calling fragment C (Settings) from menu:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
final FragmentManager fm = getActivity().getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.setCustomAnimations(R.anim.slide_in, R.anim.slide_iout, R.anim.slide_in, R.anim.slide_iout);
ft.replace(R.id.frame, new Settings(), "settings");
ft.commit();
break;
I'm passing an object array from fragment A to fragment B, thus when clicking the back button on fragment C it will go back to fragment B but there is no object array to work with so in that case I want fragment C to go back to fragment A instead - I'm popping the backStack:
if (weatherDataObj == null) {
Log.d(TAG, "WEATHER DATA IS NULL");
FragmentTransaction ft = getFragmentManager().beginTransaction();
getFragmentManager().popBackStack();
// ft.remove(this);
ft.commit();
}

Try using this:
ft.setCustomAnimations(R.anim.slide_in, R.anim.slide_iout,
R.anim.slide_in, R.anim.slide_iout);

How to show second fragment from first fragment with in a single activity

I am developing a simple android app only for tablets and using android 4.0. My application have the main screen like as follow:
Oncreate() of Main Activity I am adding Fragment A in the main.xml using following code:
FragmentTransaction ft = getFragmentManager().beginTransaction();
Fragment imageFragment = new ImageFragment();
ft.replace(R.id.fragment_container, imageFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(null);
ft.commit();
This fragment A just have only a Image view which is clickable. Now I want that when user click on Image view then another fragment (Fragment B) should call and it replace the image view. The Fragment B have a VideoView which play the video.
So My second screen should be like as follow:
My problem is I am not gettting "How to call second fragment from the first one with in main screen activity?"
I can use different activities but I do not want to do so and just want to run this using fragments.
Please guide me.

This is the simplest way:
1) Inside YourActivitycreate a method:
public void goToSecondFragment(){}
FragmentTransaction ft = getFragmentManager().beginTransaction();
Fragment secondFragment = new SecondFragment();
ft.replace(R.id.fragment_container, secondFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(null);
ft.commit();
}
2) In your first fragment, when you want to replace it, call:
YourActivity activity = (YourActivity) getActivity();
activity.goToSecondFragment();

You can do the same using below:
Adding a fragment with maintaining a back stack
FragmentManager supportFragmentManager = getSupportFragmentManager();
supportFragmentManager.addOnBackStackChangedListener(new OnBackStackChangedListener() {
#Override
public void onBackStackChanged() {
}
});
FragmentTransaction fragmentTransaction = supportFragmentManager.beginTransaction();
fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
fragmentTransaction.addToBackStack("fragmentTag");
fragmentTransaction.replace(R.id.slate, fragment, "fragmentTag");
fragmentTransaction.commit();
And Replacing a fragment
FragmentManager supportFragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = supportFragmentManager.beginTransaction();
fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
fragmentTransaction.replace(R.id.slate, fragment, "fragmentTag");
fragmentTransaction.commit();
Should work for you.