Develop Reference

Android Activity has been destroyed when called getChildFragmentManager...commit()

My application structure is like this:
ActivityMedia is main activity that has 2 tabs: Photo & Video, each tab is FragmentCategory.
In each tab, the 1st screen is list of Category, and when click on a category, will show FragmentMediaList, which is list of Media for the category, with this code:
((ActivityMedia) getActivity()).addFragment(FragmentMediaList.newInstance(mediaType, aSite, null));
When clicking back from FragmentMediaList of Photo, it will show FragmentCategory of Photo, same for Video tab
In FragmentMediaList, when click on an item, will show ActivityMediaPlayer with this code:
Intent it = new Intent(getActivity(),ActivityMediaPlayer.class);
getActivity().startActivity(it);
When clicking back from ActivityMediaPlayer, app will show FragmentMediaList , back again, will show FragmentCategory
Everything was fine when I tested on my device, but on some of user's devices, when starting ActivityMediaPlayer, the ActivityMedia seems to be destroyed. When click back from ActivityMediaPlayer, the FragmentMediaList is showed, click back again, FragmentCategory is showed, but when click on a category in FragmentCategory, crash happens in this line of code of HostFragment class:
getChildFragmentManager().beginTransaction().replace(R.id.hosted_fragment, fragment).addToBackStack(null).commit();
It said "Activity has been destroyed"
Here are my classes details:
ActivityMedia:
public class ActivityMedia extends BaseActivity
...
protected void onCreate(Bundle savedInstanceState) {
viewPager = (ViewPager) findViewById(R.id.viewpager);
tabLayout = (TabLayout) findViewById(R.id.tablayout);
customPagerAdapter = new CustomPagerAdapter(getSupportFragmentManager());
// increase this limit if you have more tabs!
viewPager.setOffscreenPageLimit(1);
viewPager.setAdapter(customPagerAdapter);
tabLayout.setupWithViewPager(viewPager);
...
#Override public void onBackPressed() {
if(!BackStackFragment.handleBackPressed(getSupportFragmentManager())){
super.onBackPressed();
}
}
CustomPagerAdapter:
public class CustomPagerAdapter extends FragmentStatePagerAdapter {
private final List<String> tabTitles = new ArrayList<String>() {{
add("VIDEO");
add("PHOTO");
}};
private List<Fragment> tabs = new ArrayList<>();
public CustomPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
initializeTabs();
}
public CustomPagerAdapter(FragmentManager fragmentManager, Fragment fragment1, Fragment fragment2) {
super(fragmentManager);
tabs.add(fragment1);
tabs.add(fragment2);
}
private void initializeTabs() {
tabs.add(HostFragment.newInstance(FragmentSite.newInstance(MediaType.Movie)));
tabs.add(HostFragment.newInstance(FragmentSite.newInstance(MediaType.Photo)));
}
#Override
public Fragment getItem(int position) {
return tabs.get(position);
}
#Override
public int getCount() {
return tabs.size();
}
#Override
public CharSequence getPageTitle(int position) {
return tabTitles.get(position);
}
}
HostFragment:
public class HostFragment extends BackStackFragment {
private Fragment fragment;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View view = inflater.inflate(R.layout.host_fragment, container, false);
if (fragment != null) {
replaceFragment(fragment, false);
}
return view;
}
public void replaceFragment(Fragment fragment, boolean addToBackstack) {
try{
if (addToBackstack) {
getChildFragmentManager().beginTransaction().replace(R.id.hosted_fragment, fragment).addToBackStack(null).commit();
} else {
getChildFragmentManager().beginTransaction().replace(R.id.hosted_fragment, fragment).commit();
}
}catch (Exception e){
getChildFragmentManager().beginTransaction().remove(this);
K.log("Error when commit fragment: " + e.getLocalizedMessage());
}
}
public static HostFragment newInstance(Fragment fragment) {
HostFragment hostFragment = new HostFragment();
hostFragment.fragment = fragment;
return hostFragment;
}
}
BackStackFragment:
public abstract class BackStackFragment extends BaseFragment {
public static boolean handleBackPressed(FragmentManager fm)
{
if(fm.getFragments() != null){
for(Fragment frag : fm.getFragments()){
if(frag != null && frag.isVisible() && frag instanceof BackStackFragment){
if(((BackStackFragment)frag).onBackPressed()){
return true;
}
}
}
}
return false;
}
protected boolean onBackPressed()
{
FragmentManager fm = getChildFragmentManager();
if(handleBackPressed(fm)){
return true;
} else if(getUserVisibleHint() && fm.getBackStackEntryCount() > 0){
fm.popBackStack();
return true;
}
return false;
}
}

Show a detail fragment when clicking an item in a ListFragment in Android Studio

My app has a tab bar that should be visible at all times. The first tab contains a ListFragment. When I click on an item within, it loads a new activity that creates a detail fragment displaying the contents of the object in the list. I would like to display this content without having to start a new activity because it also destroys the tab bar!
Any help would be greatly appreciated!
To illustrate, here are some screenshots and code:
This is the code for the FragmentActivity that creates the tabs:
public class MainFragmentActivity extends FragmentActivity
implements ActionBar.TabListener {
SectionsPagerAdapter sectionsPagerAdapter = null;
ViewPager viewPager = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
getActionBar().setDisplayShowHomeEnabled(false);
getActionBar().setDisplayShowTitleEnabled(false);
sectionsPagerAdapter =
new SectionsPagerAdapter
(
getSupportFragmentManager());
viewPager = (ViewPager) findViewById(R.id.pager);
viewPager.setAdapter(sectionsPagerAdapter);
viewPager.setOnPageChangeListener(
new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
}); // End of sectionPageAdapter.
Tab browseTab = actionBar.newTab();
browseTab.setIcon(R.drawable.search);
browseTab.setTabListener(this);
actionBar.addTab(browseTab);
Tab myStuffTab = actionBar.newTab();
myStuffTab.setIcon(R.drawable.my_stuff);
myStuffTab.setTabListener(this);
actionBar.addTab(myStuffTab);
Tab profileTab = actionBar.newTab();
profileTab.setIcon(R.drawable.profile);
profileTab.setTabListener(this);
actionBar.addTab(profileTab);
Tab settingsTab = actionBar.newTab();
settingsTab.setIcon(R.drawable.settings);
settingsTab.setTabListener(this);
actionBar.addTab(settingsTab);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public void onTabSelected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
public class SectionsPagerAdapter extends FragmentStatePagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Fragment browseFragment = new BrowseFragment();
Bundle browseArgs = new Bundle();
browseArgs.putInt(BrowseFragment.sectionNumberKey, position + 1);
browseFragment.setArguments(browseArgs);
return browseFragment;
case 1:
Fragment myStuffFragment = new MyStuffFragment();
Bundle myStuffArgs = new Bundle();
myStuffArgs.putInt(BrowseFragment.sectionNumberKey, position + 1);
myStuffFragment.setArguments(myStuffArgs);
return myStuffFragment;
case 2:
Fragment profileFragment = new ProfileFragment();
Bundle profileArgs = new Bundle();
profileArgs.putInt(BrowseFragment.sectionNumberKey, position + 1);
profileFragment.setArguments(profileArgs);
return profileFragment;
case 3:
Fragment settingsFragment = new SettingsFragment();
Bundle settingsArgs = new Bundle();
settingsArgs.putInt(BrowseFragment.sectionNumberKey, position + 1);
settingsFragment.setArguments(settingsArgs);
return settingsFragment;
}
return null;
}
// There are always 4 tabs
#Override
public int getCount() {
return 4;
}
// Return a CharSequence for the selected tab
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase();
case 1:
return getString(R.string.title_section2).toUpperCase();
case 2:
return getString(R.string.title_section3).toUpperCase();
case 3:
return getString(R.string.title_section4).toUpperCase();
}
return null;
}
}
} // End of class.
This is the code for the first tab:
public class BrowseFragment extends ListFragment {
public static String sectionNumberKey = "sec_num";
private String activityName = "Browse";
int currentPosition = 0;
List<Listing> listings = new ListingData().getListings();
public BrowseFragment() {}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
BrowseArrayAdapter adapter = new BrowseArrayAdapter(getActivity(),
R.layout.browselist_item,
listings);
setListAdapter(adapter);
}
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_browse,
container, false);
TextView tv = (TextView) rootView.findViewById(R.id.section_label);
int intSectionNumber = getArguments().getInt(sectionNumberKey);
String numAsString = Integer.toString(intSectionNumber);
tv.setText(numAsString);
activityName += " " + numAsString;
return rootView;
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(position);
}
void showDetails(int index) {
currentPosition = index;
Intent intent = new Intent();
intent.setClass(getActivity(), BrowseDetailsActivity.class);
intent.putExtra("index", index);
startActivity(intent);
}
And here is the code for the Detail Activity:
public class BrowseDetailsActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState == null) {
// During initial setup, plug in the details fragment.
BrowseDetailFragment details = new BrowseDetailFragment();
details.setArguments(getIntent().getExtras());
getFragmentManager().beginTransaction().add(android.R.id.content, details).commit();
}
}
}

Basicly you just have to use the content of the onCreate method from your BrowseDetailActivity in the showDetails method of your BrowseFragment. In this way, you can drop your BrowseDetailsActivity.
BrowseFragment.java
void showDetails(int index) {
BrowseDetailFragment details = BrowseDetailFragment.newInstance(index);
getChildFragmentManager().beginTransaction().add(details).commit();
}
And use the static newInstance method inside your BrowseDetailFragment like so:
BrowseDetailFragment.java
public class BrowseDetailFragment extends Fragment {
private int position;
public static BrowseDetailFragment newInstance(int position) {
BrowseDetailFragment fragment = new BrowseDetailFragment();
fragment.position = position;
return fragment;
}
public BrowseDetailFragment() {
//Required empty constructor
}
//Lifecycle methods and logics
}
Make sure to provide some navigation option so users can return to your list.

Nested Fragments with Fragment Pager Adapter [duplicate]

I have an application that uses ActionBarSherlock and inside the main fragment I have a ViewPager which uses several fragments to display different objects of a list.
Main Fragment:
public class CollectionDemoFragment extends SherlockFragment {
DemoCollectionPagerAdapter mDemoCollectionPagerAdapter;
ViewPager mViewPager;
public CollectionDemoFragment() {
setTitle(R.string.title);
setHasOptionsMenu(true);
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.demo_fragment, container, false);
mDemoCollectionPagerAdapter = new DemoCollectionPagerAdapter(getFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mDemoCollectionPagerAdapter);
return view;
}
#Override
public void onPause() {
//This runs when the fragment goes to backstack
super.onPause();
}
#Override
public void onResume() {
//This runs when the fragment returns from backstack
super.onResume();
}
}
ViewPagerAdapter:
public class DemoCollectionPagerAdapter extends
FragmentStatePagerAdapter {
public DemoCollectionPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = new DemoObjectFragment();
Bundle args = new Bundle();
args.putInt(DemoObjectFragment.ARG_OBJECT, i + 1);
fragment.setArguments(args);
return fragment;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
#Override
public int getCount() {
return 100;
}
#Override
public CharSequence getPageTitle(int position) {
return "OBJECT " + (position + 1);
}
}
Inside each of this fragments I can create a new Main fragment with a new list to display in the ViewPager and replace the content with this new fragment.
ViewPager Fragments:
public static class DemoObjectFragment extends Fragment {
public static final String ARG_OBJECT = "object";
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.fragment_collection_object, container, false);
Bundle args = getArguments();
((TextView) rootView.findViewById(android.R.id.text1)).setText(
Integer.toString(args.getInt(ARG_OBJECT)));
//Setup components
return rootView;
}
#Override
public void setMenuVisibility(final boolean visible) {
if (visible) {
//Do something
}
super.setMenuVisibility(visible);
}
#Override
public void onPause() {
//This should run when the fragment goes to backstack
super.onPause();
}
#Override
public void onResume() {
//This should run when the fragment returns from backstack
super.onResume();
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.someComponent:
Fragment newContent = new CollectionDemoFragment();
switchContent(newContent, true);
break;
}
}
public void switchContent(Fragment newContent, boolean addToBackStack) {
if (newContent != null) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out);
ft.replace(R.id.content_frame, newContent);
if (addToBackStack) {
ft.addToBackStack("" + newContent.getId());
}
ft.commit();
}
}
}
This works ok, until I press back and the previous main fragment returns from the backstack.
The screen is empty (since onCreateView is not called the layout is not inflated), the lifecycle methods from the fragments in the ViewPager are never called either when the main fragment enters the backstack, nor when it returns .
The only method called in the fragments of the ViewPager is the setMenuVisibility() so, only the code in there runs.
Anyone knows a way to fix this and why this happens?
Not sure if it matters but I have to support since android 2.3.

When you are creating the view adapter You have to pass the fragment child manager as argument - getChildFragmentManager() instead of getFragmentManager().
Instead of,
mDemoCollectionPagerAdapter = new DemoCollectionPagerAdapter(getFragmentManager());
you should use,
mDemoCollectionPagerAdapter = new DemoCollectionPagerAdapter(getChildFragmentManager());

Fragment to Fragment communication with FragmentStatePagerAdapter

I'm trying to update the text of my TextView in my FragmentB through the Button in my FragmentA. But whenever I click the Button, nothing happens in my TextView. What could be the problem? Here's my code:
Communicator.java:
public interface Communicator {
public void respond(String data);
}
MainActivity.java:
public class MainActivity extends FragmentActivity implements Communicator{
ViewPager viewPager = null;
FragmentManager fragmentManager = getSupportFragmentManager();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
viewPager.setAdapter(new MyAdapter(fragmentManager));
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
FragmentB fragB = new FragmentB();
fragmentTransaction.add(R.id.pager, fragB, "frag_tag");
fragmentTransaction.commit();
}
public class MyAdapter extends FragmentStatePagerAdapter {
public MyAdapter (FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = null;
if (i == 0)
{
fragment = new FragmentA();
}
if (i == 1)
{
fragment = new FragmentB();
}
if (i == 2)
{
fragment = new FragmentC();
}
if (i == 3)
{
fragment = new FragmentD();
}
if (i == 4)
{
fragment = new FragmentE();
}
if (i == 5)
{
fragment = new FragmentF();
}
return fragment;
}
#Override
public int getCount() {
return 6;
}
}
#Override
public void respond(String data) {
// TODO Auto-generated method stub
FragmentB f2 = (FragmentB) fragmentManager.findFragmentByTag("frag_tag");
f2.changeText(data);
}
}
FragmentA:
public class FragmentA extends Fragment implements OnClickListener {
int counter = 0;
Button button1;
Communicator comm;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragmenta, container, false);
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
comm = (Communicator) getActivity();
button1 = (Button) getActivity().findViewById(R.id.button1);
button1.setOnClickListener(this);
}
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
counter++;
comm.respond("The button was clicked" + counter + "times");
}
}
FragmentB:
public class FragmentB extends Fragment {
TextView text1;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragmentb, container, false);
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
text1 = (TextView) getActivity().findViewById(R.id.textView1);
}
public void changeText(String data) {
// TODO Auto-generated method stub
text1.setText(data);
}
}

The host activity can deliver messages to a fragment by capturing the Fragment instance with findFragmentById(), then directly call the fragment's public methods.
public static class MainActivity extends Activity
implements HeadlinesFragment.OnHeadlineSelectedListener{
...
public void onArticleSelected(int position) {
// The user selected the headline of an article from the HeadlinesFragment
// Do something here to display that article
ArticleFragment articleFrag = (ArticleFragment)
getSupportFragmentManager().findFragmentById(R.id.article_fragment);
if (articleFrag != null) {
// If article frag is available, we're in two-pane layout...
// Call a method in the ArticleFragment to update its content
articleFrag.updateArticleView(position);
} else {
// Otherwise, we're in the one-pane layout and must swap frags...
// Create fragment and give it an argument for the selected article
ArticleFragment newFragment = new ArticleFragment();
Bundle args = new Bundle();
args.putInt(ArticleFragment.ARG_POSITION, position);
newFragment.setArguments(args);
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack so the user can navigate back
transaction.replace(R.id.fragment_container, newFragment);
transaction.addToBackStack(null);
// Commit the transaction
transaction.commit();
}
}
}
For more detail please follow this link http://developer.android.com/training/basics/fragments/communicating.html#Deliver

How to update listview in fragment when back to previous fragment inside viewpager

Well, Consider I have have two fragments FragmentTab1 & ShowAllContactFragment. FragmentTab1 consists a list-view & and a button. When the button is clicked I replace ShowAllContactFragment in my viewpager. When shows ShowAllContactFragment, user can select several contacts by selecting check-box in a list-view & it also has a ADD contact button.
What I need: I want to update existing listview in FragmentTab1 , when user pressing ADD button in ShowAllContactFragment, after selecting some contacts in this list-view. I also remove ShowAllContactFragment, and show FragmentTab1 when this will occur.
My Solving Status: I follow the the android developers forum to communicate data between fragment via Activity. I'm almost done. I create Interface OnContactSelectedListener in ShowAllContactFragment & Implements in MainActivity. Everything is ok! . After debugging, I check my callback methods that I have data in MainActivity but I can't replace the ShowAllContactFragment & can't show the previous fragment FragmentTab1 & update it's list-view.
To open ShowAllContactFragment from FragmentTab1, I wrote like:
ShowAllContactFragment allContactsFragment = new ShowAllContactFragment();
FragmentTransaction transaction = getFragmentManager()
.beginTransaction();
transaction.addToBackStack(null);
transaction.add(R.id.fragmentTabLayout1, allContactsFragment);
transaction.commit();
My MainActivity & FragmentAdapter Looks :
public class MainActivity extends SherlockFragmentActivity implements
ShowAllContactFragment.OnContactSelectedListener {
ActionBar.Tab Tab1, Tab2, Tab3, Tab4;
private Context context = this;
// view pager
// Declare Variables
ActionBar actionBar;
ViewPager mPager;
Tab tab;
FragmentAdapter mAdapter;
List<Fragment> fragmentList = new ArrayList<Fragment>();
ArrayList<Person> blackListPersonList;
private final static String TAG_FRAGMENT = "TAG_FRAGMENT";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// set application in portrait mode
ActivityHelper.initialize(this);
actionBar = getSupportActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
addFragmentsInList();
// Locate ViewPager in activity_main.xml
mPager = (ViewPager) findViewById(R.id.pager);
// add an adapter to pager
mAdapter = new FragmentAdapter(getSupportFragmentManager(), mPager,
actionBar, fragmentList);
mPager.setAdapter(mAdapter);
addActionBarTabs();
}
public void addFragmentsInList() {
FragmentTab1 aFragmentTab1 = new FragmentTab1();
fragmentList.add(new FragmentTab1());
fragmentList.add(new FragmentTab2());
fragmentList.add(new FragmentTab3());
}
private void addActionBarTabs() {
String[] tabs = { "Tab 1", "Tab 2", "Tab 3" };
for (String tabTitle : tabs) {
ActionBar.Tab tab = actionBar.newTab().setText(tabTitle)
.setTabListener(tabListener);
actionBar.addTab(tab);
}
}
private ActionBar.TabListener tabListener = new ActionBar.TabListener() {
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
mPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
};
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// add action menu here
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.activity_itemlist, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.add_item:
// openSearch();
Toast.makeText(context, " add_item ", Toast.LENGTH_SHORT).show();
return true;
case R.id.about:
// composeMessage();
Toast.makeText(context, " about", Toast.LENGTH_SHORT).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
class FragmentAdapter extends FragmentPagerAdapter implements
ViewPager.OnPageChangeListener {
private ViewPager mViewPager;
final int TOTAL_PAGES = 3;
private List<Fragment> fragments;
SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
public FragmentAdapter(FragmentManager fm, ViewPager pager,
ActionBar actionBar, List<Fragment> fragmentsList) {
super(fm);
this.mViewPager = pager;
this.mViewPager.setOnPageChangeListener(this);
this.fragments = fragmentsList;
}
#Override
public Fragment getItem(int position) {
// switch (position) {
// case 0:
// return FragmentTab1.newInstance();
// case 1:
// return FragmentTab2.newInstance();
// case 2:
// return FragmentTab3.newInstance();
// default:
// throw new IllegalArgumentException(
// "The item position should be less or equal to:"
// + TOTAL_PAGES);
// }
return this.fragments.get(position);
}
#Override
public int getCount() {
// return TOTAL_PAGES;
return this.fragments.size();
}
public ViewPager getViewPager() {
return mViewPager;
}
// added newly
#Override
public Object instantiateItem(ViewGroup container, int position) {
Fragment fragment = (Fragment) super.instantiateItem(container,
position);
registeredFragments.put(position, fragment);
return fragment;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
registeredFragments.remove(position);
super.destroyItem(container, position, object);
}
public Fragment getRegisteredFragment(int position) {
return registeredFragments.get(position);
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
}
#Override
public void onBackPressed() {
Log.e(TAG_FRAGMENT, "onBackPressed");
FragmentManager fm = getSupportFragmentManager();
if (fm.getBackStackEntryCount() > 0) {
Log.i("MainActivity", "popping backstack");
fm.popBackStack();
} else {
Log.i("MainActivity", "nothing on backstack, calling super");
super.onBackPressed();
}
}
#Override
public void onContactSelected(ArrayList<Person> contactNumberlist) {
// data comes here, no problem.
this.blackListPersonList = contactNumberlist;
Log.d("onContactSelected", "onContactSelected");
// get error here
FragmentTab1 aFragmentTab1 = (FragmentTab1) mAdapter.getItem(0);
if (aFragmentTab1 != null) {
aFragmentTab1.updateFragment1(blackListPersonList);
}
FragmentTransaction transaction = getSupportFragmentManager()
.beginTransaction();
transaction.add(R.id.fragment_all_contacts_layout, aFragmentTab1);
transaction.commit();
}
public ArrayList<Person> getBlackListContacts() {
return blackListPersonList;
}
// public Fragment getFragment(ViewPager pager){
// Fragment theFragment = fragments.get(pager.getCurrentItem());
// return theFragment;
// }
}
FrgmentTab1 looks :
public class FragmentTab1 extends SherlockFragment implements OnClickListener {
Button btnTest;
ViewPager pager;
LinearLayout layoutBlockNumbers;
LinearLayout layoutContact, layoutCallLog, layoutSMSLog, layoutManually;
public Context mContext;
CustomizedDialog dialog;
private static final int CONTACT_PICKER_RESULT = 1001;
private static final String DEBUG_TAG = "Contact List";
private static final double RESULT_OK = -1;
ListView listViewOnlyBlackListNumber;
ArrayList<Person> personList;
BlackListAdapter aBlackListAdapter;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragmenttab1, container,
false);
layoutBlockNumbers = (LinearLayout) rootView
.findViewById(R.id.layoutAddBlockNumbers);
layoutBlockNumbers.setOnClickListener(this);
listViewOnlyBlackListNumber = (ListView) rootView
.findViewById(R.id.listViewOnlyBlackListNumber);
personList = ((MainActivity) getActivity()).getBlackListContacts();
if (personList != null) {
aBlackListAdapter = new BlackListAdapter(getActivity(), personList,
m_onSelectedEventCalender);
listViewOnlyBlackListNumber.setAdapter(aBlackListAdapter);
} else {
listViewOnlyBlackListNumber.setEmptyView(container);
}
return rootView;
}
public void updateFragment1(ArrayList<Person> personList) {
// trying to update when came back here
aBlackListAdapter = new BlackListAdapter(getActivity(), personList,
m_onSelectedEventCalender);
listViewOnlyBlackListNumber.setAdapter(aBlackListAdapter);
aBlackListAdapter.notifyDataSetChanged();
}
}
Get Error In onContactSelected, inside MainActivity
10-30 00:22:29.674: E/AndroidRuntime(26834): FATAL EXCEPTION: main
java.lang.IllegalStateException: Can't change container ID of fragment FragmentTab1{42d27380 #0 id=0x7f040032 android:switcher:2130968626:0}: was 2130968626 now 2130968638
E/AndroidRuntime(26834): at android.support.v4.app.BackStackRecord.doAddOp(BackStackRecord.java:407)
E/AndroidRuntime(26834): at android.support.v4.app.BackStackRecord.add(BackStackRecord.java:384)
E/AndroidRuntime(26834): at com.mobigic.callblocker.MainActivity.onContactSelected(MainActivity.java:240)
Hope, Somebody help me.

Your question is not very clear especially the part about how you handle those fragments. Like when you're showing the ShowAllContactFragment fragment in which layout do you put it? From the code you posted it seems you're blindly adding the ShowAllContactFragment fragment directly in the layout containing the ViewPager which isn't right.
Related to the error, you get a reference to one of the fragments already managed by the FragmentManager through the adapter of the ViewPager and then you retry to add it in a transaction, action which will fail. If you're trying to show the previous shown FragmentTab1 fragment, after showing and working with the ShowAllContactFragment fragment, you should try simply removing the last recorded action of the FragmentManager through one of its popBackStack...() methods.
Edit: I looked at your code but what you're doing is still ambiguous. I've looked at the layout for the main activity but you don't have a container with the id R.id.fragment_all_contacts_layout so I'm assuming you're somehow trying to insert the new FragmentTab1 in the layout of the old FragmentTab1 which really doesn't make any sense(not to mention you add the ShowAllContactFragment to a container with the id R.id.fragmentTabLayout1 which I also can't see). Anyway, I'm assuming that you want the ShowAllContactFragment to replace the FragmentTab1 from the ViewPager. For this you'll need a wrapper fragment to hold the two nested fragment and also enable the communication between them. For example the wrapper fragment:
public static class WrapperFragment extends Fragment implements
OnContactSelectedListener {
private static final String TAG_FIRST = "tag_first";
private static final String TAG_SECOND = "tag_second";
private static final int CONTENT_ID = 1000;
private FragmentTab1 mFrag1;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
FrameLayout content = new FrameLayout(getActivity());
content.setId(CONTENT_ID);
if (getChildFragmentManager().findFragmentByTag(TAG_SECOND) == null) {
mFrag1 = (FragmentTab1) getChildFragmentManager()
.findFragmentByTag(TAG_FIRST);
if (mFrag1 == null) {
mFrag1 = new FragmentTab1();
getChildFragmentManager().beginTransaction()
.add(CONTENT_ID, mFrag1, TAG_FIRST).commit();
}
}
return content;
}
#Override
public void onContactSelected(List<Person> contactNumberlist) {
getChildFragmentManager().popBackStackImmediate();
mFrag1.updateFragment1(contactNumberlist);
}
public void showPickerfragment() {
getChildFragmentManager().beginTransaction()
.replace(CONTENT_ID, new ShowAllContactFragment())
.addToBackStack(null).commit();
}
}
This will be the fragment that you'll use in the ViewPager's adapter instead of the FragmentTab1 fragment. Notice that it implements the OnContactSelectedListener interface. You'll also need to make some changes to other parts of the code:
#Override
public void onClick(View v) {
if (v == layoutCallLog) {
dialog.dismiss();
// make the wrapper fragment to open the ShowAllContactFragment fragment
((WrapperFragment) getParentFragment()).showPickerfragment();
// rest of the code
The ShowAllContactFragment will need to be modified to send the selection event to the wrapper fragment which implements its interface:
#Override
public void onClick(View v) {
if (v == btnAdd) {
Toast.makeText(getActivity(), "" + blockListedPersonList.size(),
Toast.LENGTH_SHORT).show();
((OnContactSelectedListener) getParentFragment())
.onContactSelected(blockListedPersonList);
}
}
And in the main activity to handle the BACK button when the ShowAllContactFragment is showing in the ViewPager:
#Override
public void onBackPressed() {
if (mViewPager.getCurrentItem() == 0) { // I assumed 0 is the position in the adapter where the WrapperFragment will be used
Fragment targetPage = getSupportFragmentManager()
.findFragmentByTag("android:switcher:" + PAGER_ID + ":" + 0); // PAGER_ID is the id of the ViewPager
if (targetPage.getChildFragmentManager().getBackStackEntryCount() > 0) {
targetPage.getChildFragmentManager().popBackStack();
}
return;
}
super.onBackPressed();
}
Keep in mind that you'll need to save the data of the nested fragments.

I used FragmentActivity and ViewPager in differents projects and there are two solutions:
1: You can use onHiddenChanged(boolean hidden) method on your FragmentTab1.
override fun onHiddenChanged(hidden: Boolean) {
// TODO Auto-generated method stub
if (!hidden) {
// check if personList size is changed
// and then call updateFragment1() methode
}
super.onHiddenChanged(hidden)
}
2: Use a static method: you can ake updateFragment1() method static so when user pressing "ADD", call updateFragment1().
Hope it helps.