I have a map fragment class and I added a button on top of it. When I click on it I am calling another fragment class with a simple textview and save button. When save is clicked I want to go back to my mapfragment class. Right now it is throwing an error when I click save and go back. The error is when it is inflating the class > Just wondering if I am doing anything wrong while popping from the backstack. I just want to remove the last one and go back to my map.
My map layout is as follows:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical">
</fragment>
</LinearLayout>
MapFragment is as follows:
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.maplayout,container,false);
return v;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
FragmentManager fm = getChildFragmentManager();
fragment = (MapFragment) fm.findFragmentById(R.id.map);
if (fragment == null) {
fragment = MapFragment.newInstance();
fm.beginTransaction().replace(R.id.map, fragment).commit();
}
}
The back method:
FragmentManager fm = getActivity().getFragmentManager();
fm.popBackStack("TEXT_FRAGMENT", FragmentManager.POP_BACK_STACK_INCLUSIVE);
fm.beginTransaction()
.replace(R.id.map_tab,
mapFragment,
"maptab")
.addToBackStack("maptab")
.commit();
The error is: Fragment does not have a view.
The map_tab is the tab on which MapFragment was added. The map fragment is added on top of this.
EDIT: In the back method I added fm.popBackStack("TEXT_FRAGMENT", FragmentManager.POP_BACK_STACK_INCLUSIVE
but then this gives me the error when I go back to my Map Fragment and on inflating I get the error.
Don't commit a new Fragment. Instead,
Look at the getFragmentManager().popBackStack() methods (there are several to choose from)
http://developer.android.com/reference/android/app/FragmentManager.html#popBackStack()
Got it to work finally. Had to remove the mapfragment before adding a new fragment.
Google's tutorial app (which uses the support library by default)
http://developer.android.com/shareables/training/FragmentBasics.zip
contains a two-pane layout for -large screens. After successfully compiling and running with min/target SDK at 4/15, I deleted all support library stuff and am trying to modernize to SDK 14/19 as an exercise.
Here is the two-pane layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment android:name="com.example.HeadlinesFragment"
android:id="#+id/headlines_fragment"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent" />
<fragment android:name="com.example.ArticleFragment"
android:id="#+id/article_fragment"
android:layout_weight="2"
android:layout_width="0dp"
android:layout_height="match_parent" />
</LinearLayout>
When the ArticleFragment is instantiated, the XML that ships with the tutorial is not wrapped in a ViewGroup:
// ArticleFragment.java
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// If activity recreated (such as from screen rotate), restore
// the previous article selection set by onSaveInstanceState().
// This is primarily necessary when in the two-pane layout.
if (savedInstanceState != null) {
mCurrentPosition = savedInstanceState.getInt(ARG_POSITION);
}
// Inflate the layout for this fragment
return inflater.inflate(R.layout.article_view, container, false);
}
and
// res/layout/article_view.xml
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/article"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:textSize="18sp" />
This arrangement returns null when something like this is run later: getActivity().findViewById(R.id.article);
I discovered through trial and error and the hierarchy viewer, that the solution to this is to wrap the article_view in a LinearLayout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/article"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:textSize="18sp" />
</LinearLayout>
Did something change between the support library and the modern Fragment implementations?
Updated to include MainActivity callback and ArticleFragment update code:
// MainActivity.java
public static class MainActivity extends Activity
implements HeadlinesFragment.OnHeadlineSelectedListener {
public void onArticleSelected(int position) {
ArticleFragment articleFrag = (ArticleFragment)
getFragmentManager().findFragmentById(R.id.article_fragment);
if (articleFrag != null) {
articleFrag.updateArticleView(position);
}...
// ArticleFragment.java
public void updateArticleView(int position) {
TextView article = (TextView) getView().findViewById(R.id.article);
article.setText(Ipsum.Articles[position]);
mCurrentPosition = position;
}
Updated to include stack trace:
09-18 19:04:45.239 1291-1291/com.example.fragmentbasicsrebuild E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
at com.example.fragmentbasicsrebuild.ArticleFragment.updateArticleView(ArticleFragment.java:74)
at com.example.fragmentbasicsrebuild.MainActivity.onArticleSelected(MainActivity.java:66)
at com.example.fragmentbasicsrebuild.HeadlinesFragment.onListItemClick(HeadlinesFragment.java:75)
at android.app.ListFragment$2.onItemClick(ListFragment.java:160)
at android.widget.AdapterView.performItemClick(AdapterView.java:298)
at android.widget.AbsListView.performItemClick(AbsListView.java:1100)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:2788)
at android.widget.AbsListView$1.run(AbsListView.java:3463)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Well, firstly you shouldn't be using getActivity().findViewById(R.id.article) from within the fragment unless you're specifically trying to access something outside of your Fragment's hierarchy (which would typically indicate you're doing something very, very wrong anyway).
What I would imagine is happening is that you're calling getActivity().findViewById() before your Fragment's hierarchy has been added to the Activity. Instead of going through the Activity, simply use your Fragment's View:
#Override
public void onViewCreated(View view, Bundle savedState) {
// "View view" is the view you returned in onCreateView(),
// and also the same view that will now be returned by
// calling getView().
TextView articleText = (TextView) view.findViewById(R.id.article);
}
As to why wrapping it in another layout causes it to work? No clue. Maybe you did something else different as well and forgot? Shouldn't make any difference, and you definitely don't have to wrap it in a layout if one isn't needed.
Static Fragments tend to have some quirks. getActivity().findViewById(R.id.article); returns null probably from the same reason that onCreateView receives a null container (check it out).
You are probably better off with dynamically creating the Fragment: (code from http://developer.android.com/guide/components/fragments.html)
FragmentManager fragmentManager = getFragmentManager()
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragment = new ExampleFragment();
fragmentTransaction.add(R.id.fragment_container, fragment);
fragmentTransaction.commit();
See also Android Fragment - onCreateView - container is null and Android Fragment is given a null container in onCreateView()
I am trying to move from one fragment to another.. It shows following error during fragment transaction-
java.lang.IllegalArgumentException: No view found for id 0x1020002 (android:id/content) for fragment PhotosFragment2{41a57218 #3 id=0x1020002}
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:930)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1115)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1478)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:446)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:153)
at android.app.ActivityThread.main(ActivityThread.java:5086)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
at dalvik.system.NativeStart.main(Native Method)
Below are the classes.I have used following code for fragment transaction
Fragment fragment = new PhotosFragment2();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(android.R.id.content, fragment);
fragmentTransaction.commit();
PhotosFragment.java
public class PhotosFragment extends Fragment {
private FragmentActivity myContext;
#Override
public void onAttach(Activity activity) {
myContext = (FragmentActivity) activity;
super.onAttach(activity);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.photos, container, false);
rootView.setVerticalScrollBarEnabled(false);
int[] mThumbIds = {
R.drawable.album8, R.drawable.album3,
R.drawable.album4, R.drawable.album8,
R.drawable.album6, R.drawable.album7,
R.drawable.album12, R.drawable.album10,
};
int[] mThumbIds2 = {
R.drawable.album8, R.drawable.album3,
R.drawable.album4,
R.drawable.album6, R.drawable.album7,
R.drawable.album9, R.drawable.album10,
R.drawable.album11, R.drawable.album12, R.drawable.album8,
R.drawable.album8, R.drawable.album3,
R.drawable.album4,
R.drawable.album6, R.drawable.album7,
R.drawable.album9, R.drawable.album10,
R.drawable.album11, R.drawable.album12, R.drawable.album8,
};
CustomGridSingle2 adapter = new CustomGridSingle2(myContext, mThumbIds);
GridView grid = (GridView)rootView.findViewById(R.id.gridView);
final ImageView img= (ImageView)rootView.findViewById(R.id.imageView7);
grid.setFocusable(false);
grid.setAdapter(adapter);
grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Fragment fragment = new PhotosFragment2();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(android.R.id.content, fragment);
fragmentTransaction.commit();
}
});
CustomGridSingle2 adapter2 = new CustomGridSingle2(myContext, mThumbIds2);
GridView grid2 = (GridView)rootView.findViewById(R.id.gridView2);
grid2.setFocusable(false);
grid2.setAdapter(adapter2);
grid2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Fragment fragment = new PhotosFragment2();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(android.R.id.content, fragment);
fragmentTransaction.commit();
}
});
return rootView;
}
}
PhotosFragment2.java
public class PhotosFragment2 extends Fragment {
private FragmentActivity myContext;
#Override
public void onAttach(Activity activity) {
myContext = (FragmentActivity) activity;
super.onAttach(activity);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View rootView = inflater.inflate(R.layout.photos2, container, false);
myContext.getActionBar().hide();
return rootView;
}
}
Activity xml file
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:id="#+id/left_drawer_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#drawable/bgmenu"
android:orientation="vertical">
<RelativeLayout
android:id="#+id/profilelayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:paddingTop="10dp">
<ImageView
android:id="#+id/drawer_profile_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/drawer_profile_background"
android:layout_alignLeft="#+id/drawer_profile_background"
android:layout_alignRight="#+id/drawer_profile_background"
android:layout_alignTop="#+id/drawer_profile_background"
android:layout_marginBottom="7.667dp"
android:layout_marginLeft="6.5dp"
android:layout_marginRight="8.3dp"
android:layout_marginTop="7.667dp"
android:scaleType="centerCrop"></ImageView>
<ImageView
android:id="#+id/drawer_profile_background"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:scaleType="centerCrop"
android:src="#drawable/profileblock">
</ImageView>
<ImageView
android:id="#+id/settingicon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/drawer_profile_background"
android:layout_marginLeft="-15dp"
android:layout_toRightOf="#+id/drawer_profile_background"
android:background="#drawable/settings" />
<textview
android:id="#+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/drawer_profile_background"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:text="Name"
android:textAppearance="?android:attr/textAppearanceListItemSmall"
android:textColor="#android:color/white" />
</RelativeLayout>
<ListView
android:id="#+id/list_slidermenu"
style="#style/buttonStyle"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginTop="30dp"
android:layout_weight="2"
android:cacheColorHint="#android:color/transparent"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="1dp"
android:listSelector="#android:color/transparent"
android:scrollbars="none" />
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
When you use fragmentTransaction.replace(R.id.container,fragment) it will remove any fragments that are already in the container and add your new one to the same container.
Now i can suggest you 2 things.First, if you want to use fragmentTransaction.replace(android.R.id.content, fragment); which you are doing right now,then don't set content for your Activity using setContentView.This should work fine then.To know what exactly android.R.id.content is you can refer this stackoverflow question and answer
Or Secondly, In the layout of your Activity have a FrameLayout whose id is content. And then use
fragmentTransaction.replace(R.id.content, fragment);
fragmentTransaction.addToBackStack(null);//add the transaction to the back stack so the user can navigate back
// Commit the transaction
fragmentTransaction.commit();
Hope this helps.
More Info:
From your comments it seems that you are having some problem in getting the idea of using FrameLayout in your Activity's layout(Not of any of the Fragment's layout).From the Documents
FrameLayout is designed to block out an area on the screen to display a single item. Generally, FrameLayout should be used to hold a single child view, because it can be difficult to organize child views in a way that's scalable to different screen sizes without the children overlapping each other.
So the main purpose of FrameLayout is to block the area required to fit the largest child view. If you use a FrameLayout as Fragment Container you can ensure that you always have the space available to accommodate the largest Fragment's layout.
So you can have your FrameLayout something like this in your Activity's layout xml file
<FrameLayout
android:id="#+id/content"
android:layout_height="match_parent"
android:layout_width="match_parent">
<!--you can put your existing views of your current xml here, so yes your entire xml is now inside this FrameLayout -->
</FrameLayout>
I don't use getSupportFragmentManager().
I use getChildFragmentManager() and it worked for me.
You can try it.
If you are trying to put Fragment into Fragment, use getChildFragmentManager()
If you are using ViewPager, use getChildFragmentManager() for pager adapter
viewPager.setAdapter(new ItemsAdapter(getChildFragmentManager()));
You have to set a content view in your Activity that your PhotosFragment is attached.
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.activity_main);
//...
}
i know this is very late. But it may work for other's.
I declared the id for each layout, like (3rd line bellow)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
Since Android 4.2 (API 17) nested fragments become avaliable.
See this
To place fragment inside other fragment use getChildFragmentManager()
Also available in support library.
I had the same error and after trying a lot of things I found that the problem was with the "id" and "getActivity().getSupportFragmentManager()".
Before i implement i like these
txt_more.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
getChildFragmentManager()
.beginTransaction()
.replace(R.id.content_frame, new OpportunitiesFragment())
.commit(); }
});
Then i changed to these
txt_more.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
## Heading ##
getActivity().getSupportFragmentManager()
.beginTransaction()
.replace(android.R.id.content, new OpportunitiesFragment())
.commit(); }
});
Put this block of code in PhotosFragment2 onCreateView method:
View rootView = inflater.inflate(R.layout.photos2, null);
instead of:
View rootView = inflater.inflate(R.layout.photos2, container, false);
in my case I had to change
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.sample,
container);
to
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.sample,
container, false);
This answer highlights a silly mistake that may occur, that arises when nesting fragments or you are converting activities to fragments.
If you are trying to replace a fragment within a fragment with the fragmentManager but you are not inflating the parent fragment that can cause an issue.
In BaseFragment.java OnCreateView:
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.replace(R.id.container, new DifferentFragment())
.commit();
}
return super.onCreateView(inflater, container, savedInstanceState);
Replace super.onCreateView(inflater, container, savedInstanceState);
with inflating the correct layout for the fragment:
return inflater.inflate(R.layout.base_fragment, container, false);
The problem may be that you add a fragment and beginTransaction in some fragment like
getFragmentManager().beginTransaction().replace(android.R.id.content, ImageBrowseFragment.newInstance(bundle),"ImageBrowseFragment")
.addToBackStack(null).commit();
I just change getFragmentManager() to getActivity().getSupportFragmentManager()
Then everything goes fine
When you add a fragment in a fragment use android.R.id.content Or Window.ID_ANDROID_CONTENT,I guess it represents the root container of your fragment not the activity. So change to getActivity().getSupportFragmentManager() works it out
If you use ViewPager with fragments (pages) and try to show a new fragment from a page, you will get this error. I think, you cannot reference to a container of an Activity from a ViewPager's page.
In this case you should call getActivity(). Then in Activity write a method that will open a new fragment.
class YourActivity : AppCompatActivity() {
fun showNewFragment(title: String) {
val fm = supportFragmentManager
fm?.beginTransaction()?.apply {
val fragment = NewFragment.newInstance(title)
replace(R.id.container, fragment, NewFragment.TAG)
addToBackStack(null)
}?.commit()
}
}
class PageFragment : Fragment() {
private fun show() {
(activity as YourActivity).showNewFragment("New fragment")
}
}
If you call getParentFragment() and add a new fragment, then you will place a new fragment inside ViewPager:
class ViewPagerFragment : Fragment() {
fun showNewFragment(title: String) {
val fm = childFragmentManager
fm?.beginTransaction()?.apply {
val fragment = NewFragment.newInstance(title)
replace(R.id.container, fragment, NewFragment.TAG)
addToBackStack(null)
}?.commit()
}
}
class PageFragment : Fragment() {
private fun show() {
(parentFragment as? ViewPagerFragment)?.showNewFragment("New fragment")
}
}
Make sure the fragment id you are calling is in the class listed in setcontent in onCreate method. For my case, I was editing the layout from linear to constraint. So as not to mess with the working code, I made another layout but messed an id in the process so that what was on oncreate was the edited layout but the fragment being called was from the old layout. Apparently, in the new layout I gave it a different id name. Search the id of your fragment using ctrl+shift+f and see if the search results point to the layout you specified in the oncreate method. Goodluck.
The most common mistake that can be happened is, If you have more than one version of XML layout (let say v21 and v23) and you added <fragment> tag in lower version of XML only (or vice-versa).
So, please check you added <fragment> tag (or pageGroup, etc) in both of the versions.
You are trying to open fragment which fragmentContainer(the view in which you are trying to open fragment) is one or more level above from your current fragmentContainer.
Try to change your fragment hierarchy architecture.
I'm ripping my hair out trying to display a thumbnail sized map in either an AlertDialog or preferably in a SherlockDialogFragment.
I have this in my xml
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
class="com.google.android.gms.maps.MapFragment" />
And with just this in my SherlockDialogFragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
getDialog().setCanceledOnTouchOutside(true);
getDialog().setTitle(offer.retailer);
View v = inflater.inflate(R.layout.businesstmpalert, container, false);
return v
}
I get an Error inflating class fragment error
What am I doing wrong?
This doesn't work because you are nesting fragment (MapFragment inside a DialogFragment) AND specifying the MapFragment in the <layout>.
From http://developer.android.com/about/versions/android-4.2.html#NestedFragments
Note: You cannot inflate a layout into a fragment when that layout includes a <fragment>. Nested fragments are only supported when added to a fragment dynamically.
You could either nest the fragment programmatically:
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
transaction.add(R.id.map_fragment_host, MapFragment.newInstance()).commit();
in DialogFragment's onActivityCreated(), or (preferably, IMHO) switching to MapView, which you can safely use as a <layout>. In this case, remember to propagate fragment lifecycle events to the MapView, as specified in https://developers.google.com/maps/documentation/android/reference/com/google/android/gms/maps/MapView
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
1-Add these lines a the end of the within manifest file.
if this not work then...
2-extends android.support.v4.app.FragmentActivity
public class MainActivity extends android.support.v4.app.FragmentActivity
I was changing a Activity to a Fragment to use inside a Scrollable Tab Activity. But I getting this exception I load this fragment:
FATAL EXCEPTION: main
android.view.InflateException: Binary XML file line #17: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at com.zhensydow.demo.MainMenuFragment.onCreateView(MainMenuFragment.java:43)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460)
....
And the used (simplified) xml loaded is:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
... >
<fragment <<---- LINE #17
android:id="#+id/mlist"
android:name="com.zhensydow.demo.MListFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
tools:layout="#android:layout/mcontent" />
<FrameLayout ... />
</LinearLayout>
The error is caused in this code:
public class MainMenuFragment extends Fragment implements
MenuListFragment.Callbacks {
// ...
#Override
public View onCreateView( LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
super.onCreateView(inflater, container, savedInstanceState);
LinearLayout ll = (LinearLayout) inflater.inflate(
R.layout.activity_main_menu, container, false);
return ll;
}
// ...
}
The error is on a fragment, I think it's caused because the old activity loaded two fragments inside him.
How can I solve it?
UPDATE: added full fragmen xml data
I suspect your Fragment contains some code like this one, requiring your Activity to implement a callback interface, and your Activity does not implement that interface.
A fragment tag is required to have both a name and an id.