Develop Reference

Android tab fragment not calling OnCreateView switching from tab2 to tab1

This is the autogenerated code from android studio when selecting a 3 tabbed layout. The problem is when it starts at the first tab, it will call onCreateView in class PlaceholderFragment. When i switch to the 2nd tab, it calls it again for that tab. Now the problem starts with going back to tab1, it doesn't call onCreateView. Now if i go to tab3 it gets called for that tab, then go back to tab1 it now gets called. So tab1's onCreateView never gets called if i go from tab2 to tab1 but gets called going from tab3 to tab1. I can't figure out why it doesn't destroy this view in that specific sequence only.
I haven't modified this auto-generated code so i'd think it would have worked correctly.
public class MainActivity extends ActionBarActivity implements ActionBar.TabListener {
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
mViewPager.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 FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
}
return null;
}
}
public static class PlaceholderFragment extends Fragment {
private static final String ARG_SECTION_NUMBER = "section_number";
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}

Viewpager has one public method named setOffScreenPageLimit() which indicates the number of pages that will be retained to either side of the current page in the view hierarchy in an idle state.
When you use the default implementation of setOffscreenPageLimit() it is only loading the one fragment which is to the right of it.
For example,
if you are currently on index1, it has index 2 loaded in memory but not index 0, so swiping to left will load a new fragment from scratch. Use setOffScreenLimit(1), setOffScreenLimit(2) etc. it will help clear out your doubts about the concept.

retain state of viewpager fragments android

I have a viewpager in a fragment in which i am showing 3 fragments but when I open the fragment first time it opens fine and when I move to another fragment and came back to the viewpager fragment it doesn't show the fragments in view pager then I have to either change the orientation of the phone or keep swiping the viewpager for the hidden fragments to show.
I have googled it and now I know I have to set the tag to each fragment and retrieve fragment with findfragmentbytag method but problem is when I try to set the tag to fragment
getSupportFragmentManager().beginTransaction().add(myFragment, "Some Tag").commit();
above line crashes my app and logcat shows "cant set tag to fragment", I know I'm doing some stupid mistake
this is the complete code of my fragment. I would really appreciate if one could guide me where to write the code for setting the tag of fragments. thanks in advance.
public class MatchesListingFragment extends Fragment implements ActionBar.TabListener {
Context context;
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
ActionBar actionBar;
Matchlistings db;
Bundle savedInstanceState;
Fragment livescore,fixture,results;
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
this.savedInstanceState = savedInstanceState;
db = new Matchlistings(getActivity());
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_matches, container, false);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
context = getActivity().getApplicationContext();
if(savedInstanceState == null){
livescore = new LiveScoreListingFragment();
fixture = new FixturesListingFragment();
results = new ResultsListingFragment();
}
if(!Constants.is_listing_refreshed){
Log.i(MainActivity.TAG,"refreshing list");
db.loadListingsFromServer().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}
actionBar = getActivity().getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
if(mSectionsPagerAdapter == null)
mSectionsPagerAdapter = new SectionsPagerAdapter(getActivity().getSupportFragmentManager());
mViewPager = (ViewPager) getView().findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
Tab tb = actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this);
actionBar.addTab(tb);
}
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
Fragment fragment;
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch(position){
case 0:
fragment = livescore;
return fragment;
case 1:
fragment = fixture;
return fragment;
case 2:
fragment = results;
return fragment;
case 3:
fragment = new LiveScoreListingFragment();
return fragment;
}
return null;
}
#Override
public int getCount() {
return 4;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "LIVE";
case 1:
return "FIXTURES";
case 2:
return "RESULTS";
case 3:
return "HOT";
}
return null;
}
}
#Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
actionBar.removeAllTabs();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
}
#Override
public void onTabReselected(Tab arg0, FragmentTransaction arg1) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(Tab arg0, FragmentTransaction arg1) {
// TODO Auto-generated method stub
}
#Override
public void onTabUnselected(Tab arg0, FragmentTransaction arg1) {
// TODO Auto-generated method stub
}
}
EDIT:
i have now tried to get the fragment from viewpager by tag instead of creating new fragment everytime. but problem is still same.
FixturesListingFragment fixture = (FixturesListingFragment) getActivity().getSupportFragmentManager().findFragmentByTag("android:switcher:"+R.id.pager+":1");
if(fixture == null)
fixture = new FixturesListingFragment();

Have you tried to use setOffscreenPageLimit? if you have 3 pages then set it to 2. This way pages won't be recreated even if the app is on iddle state. Here is the link

I Have solved thiw problem by just using setOffScreenpageLimit(int) to the number of additional tabs that I have.
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new FragmentHome(), "Home");
adapter.addFragment(new FragmentEProfile(), "e-Profile");
adapter.addFragment(new FragmentResults(), "Results");
adapter.addFragment(new FragmentOutpass(), "Outpass");
viewPager.setAdapter(adapter);
viewPager.setOffscreenPageLimit(3);
}

i have fixed the issue by changing FragmentPagerAdapter to FragmentStatePagerAdapter...
this is what i read in the sample app downloaded from this link
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide fragments for each of the
* three primary sections of the app. We use a {#link android.support.v4.app.FragmentPagerAdapter}
* derivative, which will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
and changed it.. but still wondering there should be a way to do it with FragmentPagerAdapter

Try to retain the instance as mentioned below:
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
//add this line
setRetainInstance(true);
context = getActivity().getApplicationContext();

Android replace Fragments

I want to replace a Fragment by a new Fragment when an onClick method is called. I wanted to do it this way:
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.remove(this);
transaction.addToBackStack(null);
transaction.add(new ChooseCocktailFragment(), null);
transaction.commit();
The only thing that happens is the current Fragment is removed and the new one doesn't show. What am I doing wrong here?
Also, I use a ViewPager and this is the first time for me working with fragments. Usually I would have a Container with its ID but here the ViewPager contains the fragments, therefore I don't know how to use the transaction.replace(...) method.

You should use a FragmentPagerAdapter which is adequate to put Fragments inside ViewPagers.
A complete tutorial from android developer here
EDIT:
First of all, you need to override the getItemPosition of the adapter, and return the POSITION_NONE constant in order to be able to replace pager's fragments.
#Override
public int getItemPosition(Object object)
{
return POSITION_NONE;
}
Then create a listner for handling fragment switching:
public interface MyListener
{
public void onFragmentChange();
}
Your adapter should implements the listner and add some code inside onFragmentChange() method:
public class TabsPagerAdapter extends FragmentPagerAdapter {
private FragmentManager fm;
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
this.fm = fm;
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 0:
fragment1 = TopRatedFragment.newInstance(this);
return fragment1;
case 1:
// ...
return fragment2;
case 2:
// ...
return fragment3;
case 3:
// ...
return fragment4;
}
return null;
}
#Override
public int getCount() {
// get item count - equal to number of tabs
return 4;
}
public void onFragmentChange(){
fm.beginTransaction().remove(fragment1).commit();
fragment1 = NewFragment.newInstance();
notifyDataSetChanged(); // notify the viewpager adapter that content has changed
}
}
Pass an instance of the listner in the fragment you want to remove/replace later :
public class TopRatedFragment extends Fragment {
public static TopRatedFragment newInstance(MyListner listner) {
this.myListner = listner;
return new TopRatedFragment ();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_top_rated, container, false);
return rootView;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// some logical here ... and when you want to change fragment do this
myListner.onFragmentChange();
}
}
Here is some more explanation of this.
You should also read about FragmentStatePagerAdapter : here
Hope it helps !

You forget hide your fragment after another fragment is added up on your fragment.
Just add more a statement transaction.hide(Your_Fragment) before transaction.commit()

#mansoulx
Here is my code which my answer refers to. Since i implemented it using a tutorial it is very similiar, just Tab names and the content of the tabs changed. I also have 4 tabs, not three - but the problem would be the same:
TabsPagerAdapter.java
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 0:
return new Fragment1();
case 1:
return new Fragment2();
case 2:
return new Fragment3();
}
return null;
}
#Override
public int getCount() {
// get item count - equal to number of tabs
return 3;
}
}
MainActivity.java
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Tab1", "Tab2", "Tab3" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initilization
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
});
let's say all Fragments would look like this:
Fragment1.java
public class TopRatedFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_top_rated, container, false);
return rootView;
}
}
The thing which should be done now is:
Replace Fragment1 on Tab1 with FragmentNew which should appear in Tab1 too! The OnClick-Event takes place in the fragment1.java for example...

Android fragment does not show anything

I am sure I am doing this wrong. This is my first attempt at using a Fragment for anything. I have a very simple application. Nothing ever shows up in my tabs.
I am sure it's a stupid mistake somewhere. Anyone have any ideas?
Here is web.xml:
Next, here is the code from the main activity that should show this webview:
public class MainActivity extends FragmentActivity implements ActionBar.TabListener {
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the action bar.
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = new WebViewFragment();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
return 4;
}
}
public static class WebViewFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View mainView = (View) inflater.inflate(R.layout.web, container, false);
WebView webView = (WebView) mainView.findViewById(R.id.webview);
webView.loadUrl("http://www.google.com");
return mainView;
}
}
}

Well this is embarrassing. Apparently if you forget to specify permissions like say for the internet, the WebView doesn't do much. I wish Android errored out when you make a request you don't have permission for. I looked at this for 3 hours before posting here. Should have waited 10 more minutes!

Click on item in ActionBar with tabs in Android 4

I am using an ActionBar with three Tabs. I also have a item in the ActionBar. I want to react on a click on these item different depending on the selected tab. How can I do this?
Code from my activity:
public class CreateProjectManually extends FragmentActivity implements ActionBar.TabListener {
private static ArrayList<String> buildingList;
private static ArrayList<String> roomList;
private static ArrayList<String> deviceList;
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide fragments for each of the
* sections. We use a {#link android.support.v4.app.FragmentPagerAdapter} derivative, which will
* keep every loaded fragment in memory. If this becomes too memory intensive, it may be best
* to switch to a {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_project_manually);
// Create the adapter that will return a fragment for each of the three primary sections
// of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the action bar.
final ActionBar actionBar = getActionBar();
// set the app icon as an action to go home
actionBar.setDisplayHomeAsUpEnabled(true);
//enable tabs in actionbar
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding tab.
// We can also use ActionBar.Tab#select() to do this if we have a reference to the
// Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by the adapter.
// Also specify this Activity object, which implements the TabListener interface, as the
// listener for when this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
/**
* Actionbar
* */
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_save:
//TODO Speichern implementieren
Toast.makeText(getBaseContext(), "Speichern",Toast.LENGTH_LONG).show();
break;
case R.id.menu_add:
//TODO Eintrag hinzufügen implementieren
if(getItem()==0){
}
break;
case android.R.id.home:
// app icon in action bar clicked; go home
Intent intent = new Intent(this, CreateProject.class);
intent.putExtra("Uniqid","From_CreateProjectManually_Activity");
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
return true;
default:
break;
}
return true;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_create_project_manually, menu);
return true;
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to one of the primary
* sections of the app.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment building_fragment = new BuildingFragment();
Fragment room_fragment = new RoomFragment();
Fragment device_fragment = new DeviceFragment();
Bundle args = new Bundle();
switch(i){
case 0:
args.putInt(BuildingFragment.ARG_SECTION_NUMBER, i);
building_fragment.setArguments(args);
return building_fragment;
case 1:
args.putInt(RoomFragment.ARG_SECTION_NUMBER, i);
room_fragment.setArguments(args);
return room_fragment;
case 2:
args.putInt(DeviceFragment.ARG_SECTION_NUMBER, i);
device_fragment.setArguments(args);
return device_fragment;
default: return null;
}
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0: return getString(R.string.building).toUpperCase();
case 1: return getString(R.string.room).toUpperCase();
case 2: return getString(R.string.devices).toUpperCase();
}
return null;
}
}
/**
* A fragment representing building structure
*/
public static class BuildingFragment extends Fragment {
public BuildingFragment() {
}
public static final String ARG_SECTION_NUMBER = "section_number";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.listviews, container, false);
ListView listView = (ListView) view.findViewById(R.id.listviewfragment);
buildingList = new ArrayList<String>();
ListAdapter listenAdapter = new ArrayAdapter(getActivity(),
android.R.layout.simple_list_item_1, buildingList);
// Assign adapter to ListView
listView.setAdapter(listenAdapter);
return view;
}
}
/**
* A fragment representing room structure
*/
public static class RoomFragment extends Fragment {
public RoomFragment() {
}
public static final String ARG_SECTION_NUMBER = "section_number";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.listviews, container, false);
ListView listView = (ListView) view.findViewById(R.id.listviewfragment);
roomList = new ArrayList<String>();
ListAdapter listenAdapter = new ArrayAdapter(getActivity(),
android.R.layout.simple_list_item_1, roomList);
// Assign adapter to ListView
listView.setAdapter(listenAdapter);
return view;
}
}
/**
* A fragment representing device structure
*/
public static class DeviceFragment extends Fragment {
public DeviceFragment() {
}
public static final String ARG_SECTION_NUMBER = "section_number";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.listviews, container, false);
ListView listView = (ListView) view.findViewById(R.id.listviewfragment);
deviceList = new ArrayList<String>();
ListAdapter listenAdapter = new ArrayAdapter(getActivity(),
android.R.layout.simple_list_item_1, deviceList);
// Assign adapter to ListView
listView.setAdapter(listenAdapter);
return view;
}
}
}

I guess you had the answer all along:
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}