Develop Reference

Fragment callback on attach complete in Activity

Is it possible to get the attach complete of a fragment in the hosting activity? I am new to Android.
Here is my code to add a fragment:
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
DecorationFragment fragment = new DecorationFragment();
ft.add(R.id.fragmentContainer,fragment,"decoration_fragment");
ft.commit();
I have 2 objects in the Fragment. I want to handle their click event in the Activity.
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_decoration, container, false);
mChangeTextColorButton = (Button) rootView.findViewById(R.id.changeTextColorButton);
mColorPallette = (LinearLayout)rootView.findViewById(R.id.color_pallette_linearView);
return rootView;
}
How to achieve this?

Not sure exactly what you're asking, but perhaps this is what you're looking for:
https://developer.android.com/reference/android/support/v4/app/FragmentActivity.html#onAttachFragment(android.support.v4.app.Fragment)
void onAttachFragment (Fragment fragment)
Called when a fragment is attached to the activity.
This is called after the attached fragment's onAttach and before the attached fragment's onCreate if the fragment has not yet had a previous call to onCreate.

Fragment is not recreated after popBackStack()

I have an Activity with a Layout named "container" where Fragments are inflated in using FragmentTransactions
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE);
transaction.replace(R.id.container, SomeFragment.newInstance());
transaction.addToBackStack(null);
transaction.commit();
One Fragment inflates another fragment with two more Fragments in a TabLayout. This is done with a TabLayout and a ViewPager. Everything works well until I pop it from the backstack.
getSupportFragmentManager().popBackStack();
When I do this, the tabs are recreated and all the lifecycle methods are called. However, they have no content. They layouts seem not to be inflated.
I have a method called initUI(View v) which is called in
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_tabs, container, false);
initUI(rootView);
return rootView;
}
It does the setup for the TabLayout.
private void initUI(View rootView) {
pager = (ViewPager) rootView.findViewById(R.id.viewPagerCollected);
tabLayout = (TabLayout) getActivity().findViewById(R.id.tabs);
pager.setAdapter(new MyPagerAdapter(getActivity().getSupportFragmentManager()));
tabLayout.setupWithViewPager(pager);
tabLayout.setVisibility(View.VISIBLE);
}
Again, this method is called but doesn't seem to do anything when popping the backstack.
What am I doing wrong here? Why is the Fragment not recreated properly even though the onCreateView and initUI are being called?
EDIT: In my TabsFragment, each Fragment has a RecyclerView. When clicking one of the Items, another Fragment opens up, displaying detailed information to the user.
Here the user can navigate back. When doing this, the TabsFragment is visible again but this time without any content. It seems like the inner fragments have not being inflated this time around.

First Add to back stack like this...
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE);
transaction.replace(R.id.container, SomeFragment.newInstance());
transaction.addToBackStack("YOUR_TAG");
transaction.commit();
After than try to popstackback()

Populate ListView only once on fragment with SlidingMenu android

I'm new on android developing, and I'm developing an app with SlidingMenu library from jfeinstein10, and i'm listing some top rated data on main screen...
Now i'm doing this by getting data from SQLite and putting on a ListView inside a fragment activity
HomeFragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.home_fragment, container, false);
new ManageSQLiteResponse((ListView)rootView.findViewById(R.id.lv_top_rate)).execute();
return rootView;
}
ManagerSQLiteResponse call:
public void updateList(ListView listView){
DietsListAdapter adapter = new DietsListAdapter(getActivity(), R.layout.single_top_rate, dietList);
listView.setAdapter(adapter);
}
And every time i switch the fragment by selecting on SlidingMenu, all the ListView is populated again, and it causes some lag, and the menu won't open or close smoothly...
So, is there some way to run AsyncTask.execute() and populate the ListView only once, and not every time the fragment is created? by this i think it will stop lagging the SlidingMenu
TVM

use this method to add fragment in your container layout.
public void replaceFragment(Fragment fragment) {
String backStateName = fragment.getClass().getName();
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft = manager.beginTransaction();
ft.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right);
Fragment fragmentPopped = manager.findFragmentByTag(backStateName) ;
if ( fragmentPopped != null )
manager.popBackStack(backStateName, 0);
else
ft.replace(R.id.container, fragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(backStateName);
ft.commit();
}
and look make a condition in code like this, if
if ( adapter.getCount() > 0 )
{
// dont add listview.setadapter() method here.
}
elsse
{
// load data in listview.
}

Android. Navigation drawer. Backstack issues in Fragment

I am trying to implement app with navigation drawer.
I created application on Eclipse.
This is default(or template) navigation drawer application.
MainActivity has root FrameLayout which includes different fragments at different times.
By default, it contains fragment A.
When item B will be chosen from navigation drawer, it will replace fragment A to fragment B.
MainActivity:
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.container, fragmentB);
transaction.addToBackStack(null);
transaction.commit();
FragmentB is root fragment for fragmentB2, FragmentB3 etc.
I thought that in this way, it will be easier to save fragments state.
It is saving fragment state only for FragmentB2.
FragmentA(root A) onCreateView():
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
/* Inflate the layout for this fragment */
View view = inflater.inflate(R.layout.fragment_balance_root, container,
false);
FragmentTransaction transaction = getChildFragmentManager()
.beginTransaction();
transaction.replace(R.id.balance_root_frame, MainActivity.balanceMainFragment);
transaction.addToBackStack(null);
transaction.commit();
return view;
}
FragmentA2 OnCreateView():
View rootView = inflater.inflate(R.layout.fragment_balance_main,
container, false);
return rootView;
FragmentB(root B) onCreateView():
FragmentTransaction transaction = getChildFragmentManager()
.beginTransaction();
transaction.replace(R.id.tariffs_root_frame, MainActivity.tariffsMainFragment);
transaction.addToBackStack(null);
transaction.commit();
FragmentB2:
private static void goToTariffInfo() {
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.tariffs_root_frame, new TariffsInfoFragment());
transaction.addToBackStack(null);
transaction.commit();
}
Fragment B3:
View rootView = inflater.inflate(R.layout.fragment_tariffs_info,
container, false);
return rootView;
I have many questions, but they are related to each other.
1. How to avoid saving root fragment in backstack?
When I press back button on Fragment A2 it goes to A1 which is blank.
I have tried to remove addToBackStack from MainActivity. This caused to quit on only one press back button.
I have tried to remove addToBackStack from FragmentA. No effect.
2.How to set seperate backstack for different collections of fragments?
For example: Navigation drawer includes 2 items: ItemA and ItemB.
Each item can be considered as one section.
FragmenA->FragmentA2->FragmentA3
FragmentB->FragmentB2->FragmentB3
But in my situation, when I click on back button on Fragment B2, somehow app goes back to Fragment A2(which previously was opened)
Even on Fragment B3, back button causes to go to Fragment A2.
How to solve these problems?

how to move from one fragment to another fragment on button click

I am using the SherlockFragments library for the sliding menu.I have list of items as menu when
I click on item fragment get opened as an activity but it is a fragment.Now I am new to fragments.i don't know how to move from one fragment to another fragment.As in activity, we have intent to move to another activity.but in fragment I don't how to move to another fragment.I have a button in fragmentA.when I click on this button it moves to fragment B.
By googling I came to know that it has different cycles but anyhow I get toast msg when I click button
here is following code
public class Fragment2 extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.actionnetworklogin, container, false);
Button login = (Button)view.findViewById(R.id.login);
login.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(v.getContext().getApplicationContext(),"login clicked", 5000).show();
}
});
return view;
}
}
Can someone please tell me how can I move one fragment to another fragment?
Is there any other method that I can use activities instead of fragments?
I have written code for all activities and java files but I don't know that sliding menu has fragmented and now I have to write all the code fragments.

It's simple Only three line code...
Fragment fragment = new SalesFragment();
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.frame_container, fragment).commit();

This is the code I use to switch fragments inside a view:
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace([viewId], fragment, tag);
fragmentTransaction.addToBackStack(tag);
fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragmentTransaction.commit();

You can try this also:-
public void ButtonClick(View view) {
Fragment mFragment = new YourNextFragment();
getSupportFragmentManager().beginTransaction()
.replace(R.id.content_frame, mFragment ).commit();
}

FragmentManager fragmentManager = getFragmentManager();
fragmentManager
.beginTransaction()
.replace(R.id.frame_container,
new TeacherFragment()).commit();

FragmentTransaction fragmenttransaction = getSupportFragmentManager().beginTransaction();
FirstFragment regcomplainfragment = new FirstFragment();
fragmenttransaction.replace(R.id.content_frame, regcomplainfragment).addToBackStack("tag");
fragmenttransaction.commit();

//Below is the example
//In first Fragment
Fragment fragment = new YourFragmentClassName();
FragmentManager fragmentManager = getActivity().getSupportFragmentManager(); android.support.v4.app.FragmentTransaction ft= fragmentManager.beginTransaction();
ft.replace(R.id.flContent, fragment);
Bundle args = new Bundle();
// Pass the values what you want to send to next fragment
args.putInt("Year", rYear);
args.putString("Month", rMonth);
args.putInt("Industry", rIndustry);
fragment.setArguments(args);
ft.commit();
//In Second Fragment
//In onCreateView Method get the values
int strYear= getArguments().getInt("Year");
String strMonth = getArguments().getString("Month");
strIndustry= getArguments().getInt("Industry");
//That's it very simple