When I press the button in the InputFragmentNew fragment, I want the newRegistrationFragment to open. But when I try to open it, I have the following problem. How do I switch from one fragment to another?
First Class
public class GirisFragmentNew extends Fragment implements View.OnClickListener{
btnKAyit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, new yeniKayıtFragment());
fragmentTransaction.commit();
}
});
}
Second Fragment
public class yeniKayıtFragment extends Fragment {
private yeniKayıtModel yeniKayıtModel;
public View onCreateView(#NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
yeniKayıtModel =
ViewModelProviders.of(this).get(yeniKayıtModel.class);
View root = inflater.inflate(R.layout.fragment_yenikayit, container, false);
Window window=getActivity().getWindow();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
window.setNavigationBarColor(getResources().getColor(R.color.colorPrimary));}
return root;
}
Second Class Xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="...yeniKayıtFragment">
<FrameLayout
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:id="#+id/fragment_container"
/>
<WebView
android:id="#+id/webviewYeniKayıt"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</FrameLayout>
In your MainActivity create this public variable
public static FragmentManager manager;
then inside the onCreate method
manager = getSupportFragmentManager();
then in your GirisFragmentNew fragment
btnKAyit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
yeniKayıtFragment fragment = new yeniKayıtFragment();
MainActivity.manager.beginTransaction().replace(R.id.fragment_container,fragment,yenTAG).commit();
}
});
In case of Fragment you have to use getChildFragmentManager instead of getFragmentManager. Don't use static variable which you have tried. Check below:
btnKAyit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
FragmentTransaction fragmentTransaction = getChildFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, new yeniKayıtFragment());
fragmentTransaction.commit();
}
});
Related
I am trying to replace one fragment with another on button click listener in Adapter Class. Compiler is going to the onClickListener but the fragment is not replacing.
#OnClick(R.id.ib_view)
public void gotoTranscationDetailsFragment() {
Toast.makeText(mParent, "Hi", Toast.LENGTH_SHORT).show();
Fragment viewSuspendedTransactionFragment = new ViewSuspendedTransactionFragment();
FragmentManager manager = mParent.getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.fragment_suspend_transaction, viewSuspendedTransactionFragment);
transaction.commit();
}
FULL CODE
public class SuspendedTransactionListAdapter extends RecyclerView.Adapter<SuspendedTransactionListAdapter.SuspendedTransactionListHolder> {
private SuspendTransactionActivity mParent;
private List<SuspendTransactionFragment.SampleDataSuspendTransactionActivity> sampleList;
private Fragment fragment;
public SuspendedTransactionListAdapter(SuspendTransactionActivity mParent, List<SuspendTransactionFragment.SampleDataSuspendTransactionActivity> sampleList, Fragment fragment) {
this.mParent = mParent;
this.sampleList = sampleList;
this.fragment = fragment;
}
#Override
public SuspendedTransactionListHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_suspended_transaction_list, parent, false);
return new SuspendedTransactionListHolder(itemView);
}
#Override
public void onBindViewHolder(SuspendedTransactionListHolder holder, int position) {
SuspendTransactionFragment.SampleDataSuspendTransactionActivity sampleDataSuspendTransactionActivity = sampleList.get(position);
holder.mTransactionNoTextView.setText(sampleDataSuspendTransactionActivity.getTransactionNo());
}
#Override
public int getItemCount() {
return sampleList.size();
}
class SuspendedTransactionListHolder extends RecyclerView.ViewHolder {
#BindView(R.id.ib_view)
ImageButton mViewImageButton;
public SuspendedTransactionListHolder(View view) {
super(view);
ButterKnife.bind(this, view);
}
#OnClick(R.id.ib_view)
public void gotoTranscationDetailsFragment() {
Toast.makeText(mParent, "Hi", Toast.LENGTH_SHORT).show();
Fragment viewSuspendedTransactionFragment = new ViewSuspendedTransactionFragment();
FragmentManager manager = mParent.getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.fragment_suspend_transaction, viewSuspendedTransactionFragment);
transaction.commit();
}
}
XML - Activity
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".transaction.activities.SuspendTransactionActivity">
<fragment
android:id="#+id/fragment_suspend_transaction"
class="com.sahasram.siripos.fragments.SuspendTransactionFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/actionbar"
tools:layout="#layout/fragment_suspend_transaction" />
</RelativeLayout>
If you define a Fragment in your xml using the tag <fragment> then it is a constant part of your View hierarchy and you can't remove/replace it. If you want to replace Fragment you should define a layout that is replaceable (serves as a container for your Fragment). So, your Activity layout could be as follows:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".transaction.activities.SuspendTransactionActivity">
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/actionbar" />
</RelativeLayout>
And then you can replace it afterwards as:
#OnClick(R.id.ib_view)
public void gotoTranscationDetailsFragment() {
Toast.makeText(mParent, "Hi", Toast.LENGTH_SHORT).show();
Fragment viewSuspendedTransactionFragment = new ViewSuspendedTransactionFragment();
FragmentManager manager = mParent.getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.fragment_container, viewSuspendedTransactionFragment);
transaction.commit();
}
For more information please look here
I am sending data from one fragment to another, using interface. This works absolutely fine. Now I am trying to use onSaveInstanceState() to save the value in
a Fragment and retrieving in onCreate(). however i'm getting null in Bundle of onCreate(). P.S. everything works fine when i set the Fragment directly into the activity layout in xml. but when i set the fragment through java code into the activity, the onSaveInstanceState is failing. It is not saving the last known value. Please help. Pasting the code below. You can try it out to know the exact issue.
Fragment_A :
public class Fragment_A extends Fragment implements View.OnClickListener {
Button btnAdd;
int counter = 0;
Communicator comm;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(savedInstanceState != null){
counter = savedInstanceState.getInt("counter", 0);
}
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_a, container, false);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
comm = (Communicator) getActivity();
btnAdd = (Button) getActivity().findViewById(R.id.btnAdd);
btnAdd.setOnClickListener(this);
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("counter", counter);
}
#Override
public void onClick(View v) {
counter++;
comm.sendData(counter);
}
}
interface Communicator{
void sendData(int i);
}
=====
Activity :
public class Activity_InterComm extends Activity implements Communicator{
FragmentManager manager;
FragmentTransaction transaction;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_intercomm);
Fragment_A fragment_1 = new Fragment_A();
Fragment_B fragment_2 = new Fragment_B();
manager = getFragmentManager();
transaction = manager.beginTransaction();
transaction.add(R.id.frag_a, fragment_1, "Frag1");
transaction.add(R.id.frag_b, fragment_2, "Frag2");
transaction.commit();
}
#Override
public void sendData(int i) {
manager = getFragmentManager();
Fragment_B fragment_b = (Fragment_B) manager.findFragmentById(R.id.frag_b);
fragment_b.setData("Button has been clicked " + i + " times");
}
}
=====
Fragment_B :
public class Fragment_B extends Fragment {
TextView txtMessage;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_b, container, false);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
txtMessage = (TextView) getActivity().findViewById(R.id.txtMessage);
}
public void setData(String message){
txtMessage.setText(message);
}
}
activity_intercomm.xml :
<?xml version="1.0" encoding="utf-8"?>
<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/frag_a"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_weight="1"
android:name="android.learning.com.fragintercomm.Fragment_A"/>
<fragment
android:id="#+id/frag_b"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:name="android.learning.com.fragintercomm.Fragment_B"/>-->
<LinearLayout
android:id="#+id/frag_a"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_weight="1"
android:background="#color/colorAccent"
android:orientation="vertical"/>
<LinearLayout
android:id="#+id/frag_b"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_weight="1"
android:background="#color/colorPrimaryDark"
android:orientation="vertical"/>
</LinearLayout>
the soluion I found was using getView() instead of getActivity() while initializing the button in Fragment_A. use btnAdd = (Button) getView().findViewById(R.id.btnAdd); instead of btnAdd = (Button) getActivity().findViewById(R.id.btnAdd);.
However, you can't use getView() in Fragment_B. The Textview freezes and, onSaveInstanceStat() doesn't work. Please suggest a solution.
I want add 2 fragment into activity, and when click on button switch between this fragments!
I want show Fragment_1 for by default in activity (my mean is : when running activity, show fragment_1) and when click on button switch between fragment_2 and fragment_1 !
I write below codes, and when running activity show fragment_1 but when click on button for switch between fragments, show me Force Close error.
FC error :
08-27 14:15:41.363 14224-14224/com.mohammad.nouri.diaryday E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mohammad.nouri.diaryday, PID: 14224
java.lang.IllegalStateException: commit already called
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:641)
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:621)
at com.mohammad.nouri.diaryday.Activities.LoginActivity$1.onClick(LoginActivity.java:58)
at android.view.View.performClick(View.java:4764)
at android.view.View$PerformClick.run(View.java:19844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5349)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
Activity codes:
public class LoginActivity extends AppCompatActivity {
private Context context;
private boolean status = false;
FragmentTransaction fT;
FragmentManager fM;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
context = this;
Glide.with(this).load(R.drawable.login_header_image)
.bitmapTransform(new BlurTransformation(context, 20))
.into((ImageView) findViewById(R.id.login_background));
fM = getSupportFragmentManager();
fT = fM.beginTransaction();
if (!status) {
LoginFragment f1 = new LoginFragment();
fT.add(R.id.login_cardView, f1);
fT.commit();
status = true;
}
FloatingActionButton f = (FloatingActionButton) findViewById(R.id.login_registerButton);
f.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (!status) {
RegisterFragment f1 = new RegisterFragment();
fT.add(R.id.login_cardView, f1);
fT.commit();
status = true;
}else {
LoginFragment f2 = new LoginFragment();
fT.add(R.id.login_cardView, f2);
fT.commit();
status = false;
}
}
});
}
}
How can I fix it ? Thanks all <3
You only call commit() once in a FragmentTransaction which you already do in the onCreate(). So, just create a new FragmentTransaction within your fab:
FloatingActionButton f = (FloatingActionButton) findViewById(R.id.login_registerButton);
f.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (!status) {
RegisterFragment f1 = new RegisterFragment();
fM.beginTransaction().add(R.id.login_cardView, f1)
.commit();
status = true;
}else {
LoginFragment f2 = new LoginFragment();
fM.beginTransaction().add(R.id.login_cardView, f2)
.commit();
status = false;
}
}
});
Instead of adding the fragments try replacing because you have already added once above.
MainActivity.java
public class MainActivity extends AppCompatActivity {
Button btnFragment;
LinearLayout fragmentContainer;
boolean toggleFlag = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragmentContainer = (LinearLayout) findViewById(R.id.fragment_container);
FragmentA fragmentA = new FragmentA();
final FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragmentA);
fragmentTransaction.commit();
btnFragment = (Button) findViewById(R.id.btn_fragment);
btnFragment.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(toggleFlag) {
FragmentA fragmentA = new FragmentA();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragmentA);
fragmentTransaction.commit();
} else {
FragmentB fragmentB = new FragmentB();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragmentB);
fragmentTransaction.commit();
}
toggleFlag = !toggleFlag;
}
});
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/btn_fragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Toggle Fragment" />
</LinearLayout>
<LinearLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>
</LinearLayout>
FragmentA.java
public class FragmentA extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootview = inflater.inflate(R.layout.layout_fragment_a, null);
return rootview;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
}
layout_fragment_a.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="#+id/picture"
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#mipmap/ic_launcher"/>
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Demo Fragment A"
android:textColor="#android:color/black"/>
</LinearLayout>
FragmentB.java
public class FragmentB extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootview = inflater.inflate(R.layout.layout_fragment_b, null);
return rootview;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
}
layout_fragment_b.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="#+id/picture"
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#mipmap/ic_launcher"/>
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Demo Fragment B"
android:textColor="#android:color/black"/>
</LinearLayout>
use this method to call fragment
rplaceFragment(Fragment fragment , int id){
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(id, fragment);
fragmentTransaction.commit();
}
i want to redirect activity to fragment when clicking button but it gives me error.
here is my activity class
public class EventDetailsNotif extends Activity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.eventdetails);
ImageButton imgmenu = (ImageButton) findViewById(R.id.imgmenu);
imgmenu.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
loadFragmentObj = new LoadFragment(getFragmentManager());
loadFragmentObj.initializeFragment(new ManagemntPageFragment());
}
});
}
}
and my load fragment class is here.
public class LoadFragment {
FragmentManager fragmentManager;
FragmentManager fragmentManager1;
public LoadFragment(FragmentManager fragmentManager2) {
this.fragmentManager = fragmentManager2;
}
public void initializeFragment(Fragment resultFragment) {
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
fragmentTransaction.replace(R.id.content, resultFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
and my content.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent" />
and my fragment class.
public class ManagemntPageFragment extends Fragment {
ImageView footervie;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = (RelativeLayout) inflater.inflate(R.layout.managmntpg,
container, false);
footervie = (ImageView) view.findViewById(R.id.footervie);
advtimagepath = Utility.getSharedKey("advertiseFooter_image",
getActivity());
if (!TextUtils.isEmpty(advtimagepath)) {
if (advtimagepath.endsWith(".jpeg")
|| advtimagepath.endsWith(".jpg")
|| advtimagepath.endsWith(".gif")
|| advtimagepath.endsWith(".png")) {
imageLoader = new ImageLoader(getActivity());
imageLoader.DisplayImage(advtimagepath, footervie);
} else {
}
}
return view ;
}
}
please reply if have solution
are you sure you have below code
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent" />
in eventdetails layout file because you set content menu in activity to this layout
setContentView(R.layout.eventdetails);
and if you don't use support library for fragment you will have compatibility with older android version!
The following is layout
test.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="Click"
android:id="#+id/button"
/>
<!-- Framelayout to display Fragments -->
<FrameLayout
android:id="#+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
test_detail.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Hello"
android:id="#+id/textView" android:layout_gravity="center_horizontal"/>
</LinearLayout>
common_view_pager_layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="#+id/MainViewerPage"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<android.support.v4.view.PagerTabStrip
android:id="#+id/TitlePageTabStrip"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.v4.view.ViewPager>
</LinearLayout>
The following is my Activity code
public class TestFragmentActivity extends FragmentActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.test);
Button button = (Button) this.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, new HomeFragment()).commit();
}
});
}
public class HomeFragment extends Fragment {
private PagerAdapter _adapter;
public HomeFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.common_view_pager_layout, container, false);
this._adapter = new PagerAdapter(TestFragmentActivity.this);
this._adapter.add(new DetailFragment());
ViewPager pager = (ViewPager) view.findViewById(R.id.MainViewerPage);
pager.setAdapter(this._adapter);
return view;
}
}
public class DetailFragment extends Fragment {
public DetailFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.test_detail, container, false);
return rootView;
}
}
public class PagerAdapter extends FragmentPagerAdapter {
private ArrayList<Fragment> _fragments;
public PagerAdapter(FragmentActivity activity) {
super(activity.getSupportFragmentManager());
this._fragments = new ArrayList<Fragment>();
}
public void add(Fragment fragment) {
this._fragments.add(fragment);
}
#Override
public Fragment getItem(int position) {
return this._fragments.get(position);
}
#Override
public CharSequence getPageTitle(int position) {
return "Test";
}
#Override
public int getCount() {
return 1;
}
}
}
When I click a button the fragment in ViewPager was display
But when I click the button again the fragment disappear
Please help me.
try using this:
in the constructor of your adapter change this :
public class MyPagerAdapter extends FragmentPagerAdapter {
private ArrayList<Fragment> _fragments;
public MyPagerAdapter(FragmentManager activity) {
super(activity);
this._fragments = new ArrayList<Fragment>();
}
public void add(Fragment fragment) {
this._fragments.add(fragment);
}
#Override
public Fragment getItem(int position) {
return this._fragments.get(position);
}
#Override
public CharSequence getPageTitle(int position) {
return "Test";
}
#Override
public int getCount() {
return 1;
}
}
and when you want to create the adapter send getChildFragmentManager() to its constructor
public class HomeFragment extends Fragment {
private MyPagerAdapter _adapter;
public HomeFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.common_view_pager_layout, container, false);
ViewPager pager = (ViewPager) view.findViewById(R.id.MainViewerPage);
this._adapter = new MyPagerAdapter(getChildFragmentManager());
this._adapter.add(new DetailFragment());
pager.setAdapter(this._adapter);
return view;
}
}
I test it and it works, any problem comment it.
Good Luck!
In your Fragment class, in the onCreate() method, you have to call setRetainInstance(true) like this:
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
This tells the FragmentManager to keep your fragments on reloads.
In addition, check your manifest file doesn't have any
android:screenOrientation
config changes where you are basically saying you will handle reloads due to config changes yourself.
In PagerFragment 's onResume() add this:
#Override
public void onResume() {
super.onResume();
for (Fragment fragment : getFragmentManager().getFragments()) {
if (fragment instanceof Tab1Fragment || fragment instanceof Tab2Fragment) {
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.detach(fragment);
ft.attach(fragment);
ft.commit();
}
}
}
Try to add this lines in your code:
public int getItemPosition(Object object) {
return POSITION_NONE;
}
and Add the below lines
pager.setOnPageChangeListener(new OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
... anything you may need to do to handle pager state ...
adapter.notifyDataSetChanged(); //this line will force all pages to be loaded fresh when changing between fragments
}
Under
pager.setAdapter(adapter);
Hope this may help you!
Ensure you pass the adapter instance the child fragment manager, not the fragment manager.
Like this:
this._adapter = new PagerAdapter(getChildFragmentManager());