Develop Reference

Calling a Fragment from another fragment

I have a slinding tab with 3 fragments in it. The first fragment has a button which should open a fragment under the same sliding tab.
I have the following view:
https://drive.google.com/file/d/0B1QZMHJgpviceXlOWWFUdHdnTTQ/edit?usp=sharing
The final view i want on button click from above is as follows:
https://drive.google.com/file/d/0B1QZMHJgpvicZzlSeXhLTFFlNE0/edit?usp=sharing
I tried using replace but the fragments overlap each other.
The code for the fragmentactivity, adapter and a fragment is as follows:
public class Slidingtab extends FragmentActivity implements
ActionBar.TabListener{
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Post", "Recent", "Search" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_slidingtab);
Log.d("Slding tab", "started");
// 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((TabListener) this));
}
/**
* on swiping the viewpager make respective tab selected
* */
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) {
}
});
Log.d("Slding tab", "ended");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.slidingtab, menu);
return true;
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
Adapter
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
Log.d("adapter constructor", "started");
}
#Override
public Fragment getItem(int index) {
Log.d("adapter", "started");
switch (index) {
case 0:
// Top Rated fragment activity
return new Homefragment();
case 1:
// Games fragment activity
return new Recentfragment();
case 2:
// Movies fragment activity
return new Searchfragment();
}
Log.d("adapter", "ended");
return null;
}
#Override
public int getCount() {
// get item count - equal to number of tabs
return 3;
}
}
HomeFragment
public class Homefragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d("Home fragment", "started");
View rootView = inflater.inflate(R.layout.activity_homefragment, container, false);
Log.d("Home fragment", "ended");
return rootView;
}
}
I have the button in this fragment. I want the button click to open a fragment.
Any help?

Without seeing your code, I can't tell definitively, but you can try something like this:
// 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();
Check out tutorial for more.

How to add swipe in tabs

I am using support library to create action bar in my app. I have added actions in action bar thats working perfect. Now I edit tabs below that. But for changing tabs I have to click on tabs. I want to add swipe in this code. But Its difficult for me as I am taking reference from one link thats only show to add tabs and change them with on click on them. So please someone help me to add swipe from screen to change tabs.
Code-
public class Types extends ActionBarActivity {
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.types);
setupTabs();
}
private void setupTabs() {
android.support.v7.app.ActionBar ab = getSupportActionBar();
ab.setNavigationMode( ActionBar.NAVIGATION_MODE_TABS );
Tab tab = ab.newTab()
.setText( R.string.frag1).setTabListener(new MyTabListener(this, Type1.class.getName()));
ab.addTab(tab);
tab = ab.newTab()
.setText( R.string.frag2).setTabListener(new MyTabListener( this, Type2.class.getName() ) );
ab.addTab(tab);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_search:
homeActivity();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void homeActivity() {
Toast.makeText(this, "Home Option Selexted", Toast.LENGTH_SHORT).show();
}
private class MyTabListener implements ActionBar.TabListener
{
private Fragment mFragment;
private final Activity mActivity;
private final String mFragName;
public MyTabListener( Activity activity, String fragName )
{
mActivity = activity;
mFragName = fragName;
}
#Override
public void onTabReselected( Tab tab,
FragmentTransaction ft )
{
}
#Override
public void onTabSelected( Tab tab,
FragmentTransaction ft )
{
mFragment = Fragment.instantiate( mActivity, mFragName );
ft.add( android.R.id.content, mFragment );
}
#Override
public void onTabUnselected( Tab tab, FragmentTransaction ft )
{
ft.remove( mFragment );
mFragment = null;
}
}

Create ViewPagerAdapter class-
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
private final int PAGES = 4;
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new Type1();
case 1:
return new Type2();
case 2:
return new Type3();
case 3:
return new Type4();
default:
throw new IllegalArgumentException("The item position should be less or equal to:" + PAGES);
}
}
#Override
public int getCount() {
return PAGES;
}
}
Then in your Typle class-
public class Types extends ActionBarActivity {
private ViewPager viewPager;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.pagerad);
viewPager = (ViewPager) findViewById(R.id.pager);
ab = getSupportActionBar();
ab.setDisplayHomeAsUpEnabled(true);
ab.setDisplayShowHomeEnabled(true);
viewPager.setOnPageChangeListener(onPageChangeListener);
viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
addActionBarTabs();
}
private ViewPager.SimpleOnPageChangeListener onPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
super.onPageSelected(position);
ab.setSelectedNavigationItem(position);
}
};
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_search:
homeActivity();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void homeActivity() {
Toast.makeText(this, "Home Option Selexted", Toast.LENGTH_SHORT).show();
}
private void addActionBarTabs() {
ab = getSupportActionBar();
String[] tabs = { "TYPE 1", "TYPE 2", "TYPE 3", "TYPE 4" };
for (String tabTitle : tabs) {
ActionBar.Tab tab = ab.newTab().setText(tabTitle).setTabListener(tabListener);
ab.addTab(tab);
}
ab.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
}
private ActionBar.TabListener tabListener = new ActionBar.TabListener() {
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
};
}
Finally create pagerad xml-
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
Then create Each Type fragment like-
public class Type1 extends Fragment{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.type, container, false)
return rootView;
}
}

You need to use the ViewPager.
When implementing the viewpager from the android tutorial you simply need to focus on the getitem method of the SectionsPagerAdapter. Here you could pick the right fragment based on the position of the position of the "view".
Your challenge is that the swipe part of the app is now one activity only, and each view now must be implemented as a fragment. But this layout seems compatible with your current code (eg similar to the onTabSelected method).
You types.xml file should be a ViewPager:
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.Types" />
Next, declare a ViewPager and SectionsPagerAdapter in you Types activity:
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
Now, in you OnCreate add:
// Create the adapter that will return a fragment for each swipe screen
mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
The SectionsPagerAdapter is implemented as:
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
if (position == 2) {
return new FragmentA();
} else if (position == 1) {
return new FragmentB();
} else {
// Pattern from you code...
return Fragment.instantiate( mActivity, mFragName );
}
}
#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;
}
}
That's all :)

Android - Sherlock content gone after 3 swipe

I used sherlock to have action bar in android 2.3, everythings is ok but the problem is:
I have 4 tabs, after doing some works on fisrt tab if I go to the second and third tab when I came back to first tab the contetnt is ok but when I go to the last tab and then came back to the first, the conent of first fragment was restarted and everything was gone, below is my codes, why is it like that?
MainActivity:
public class MainActivity extends SherlockFragmentActivity implements
TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private com.actionbarsherlock.app.ActionBar actionBar;
private String[] tabs = { "weblog", "news", "image", "web" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getSupportActionBar();
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayShowHomeEnabled(false);
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
actionBar.setHomeButtonEnabled(false);
viewPager.setAdapter(mAdapter);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.addTab(actionBar.newTab().setText(tabs[0])
.setTabListener(this), false);
actionBar.addTab(actionBar.newTab().setText(tabs[1])
.setTabListener(this), false);
actionBar.addTab(actionBar.newTab().setText(tabs[2])
.setTabListener(this), false);
actionBar.addTab(actionBar.newTab().setText(tabs[3])
.setTabListener(this), true);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
#Override
public void onTabSelected(com.actionbarsherlock.app.ActionBar.Tab tab,
android.support.v4.app.FragmentTransaction ft) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(com.actionbarsherlock.app.ActionBar.Tab tab,
android.support.v4.app.FragmentTransaction ft) {
}
#Override
public void onTabReselected(com.actionbarsherlock.app.ActionBar.Tab tab,
android.support.v4.app.FragmentTransaction ft) {
}
}
TabsPagerAdapter:
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 0:
return new Blog();
case 1:
return new News();
case 2:
return new Image();
case 3:
return new Search();
}
return null;
}
#Override
public int getCount() {
return 4;
}
}

The ViewPager typically only keeps a few fragments in an "idle" state and recreates the other fragments as a performance optimization. See this answer.
To override this behavior, you can call setOffscreenPageLimit
// keep 3 tabs in memory on either side of the current tab
viewPager.setOffscreenPageLimit(3);

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.

FragmentPagerAdapter getItem error with ListFragment

I've looked at quite a lot of code and can't figure this out. http://developer.android.com/reference/android/support/v4/app/FragmentPagerAdapter.html
It has to be something simple.
I'm showing most of the code. The error is in the next section.
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
public static final int TAB_COUNT = 3;
public static InputMethodManager inputManager;
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);
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// 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++) {
actionBar.addTab(actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
// To control keyboard pop-up
inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, 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) {
}
This is where my error is.
case 1 of getItem, Type mismatch: Cannot convert from MainActivity.HistoryFragment to Fragment. it is telling me to either change method return type to HistoryFragment or change return type of newInstance() to Fragment. Where I can't do either. Other examples I've seen look almost identical to my code. I have tried with and without passing an argument.
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
switch (i) {
case 0:
Fragment tipCalc = new TipCalcFragment();
return tipCalc;
case 1:
// Fragment history = new HistoryFragment();
return HistoryFragment.newInstance(i); //ERROR HERE
case 2:
Fragment stats = new StatsFragment();
return stats;
}
return null;
}
And my HistoryFragment that extends ListFragment. In the end it won't be pulling from the String[] values but from database resources. I just wanted to setup a structure first and see it/play with the layout.
public static class HistoryFragment extends ListFragment {
// public HistoryFragment() {
// }
String[] values = new String[] { ... };
static HistoryFragment newInstance(int num) {
HistoryFragment history = new HistoryFragment();
Bundle args = new Bundle();
args.putInt("num", num);
history.setArguments(args);
return history;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.history, container, false);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, android.R.id.text1,
values));
}
}

I figured it out after getting some sleep. I was importing android.app.ListFragment instead of android.support.v4.app.ListFragment

I think you will have to typecast to fragment before returning. So try this
Fragment history = HistoryFragment.newInstance(i);
return history;