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Fragment not retaining EditText value after screen rotation [duplicate]

This question already has answers here:
How to retain EditText data on orientation change?
(12 answers)
Closed 5 years ago.
I have already posted this question once and even tried all possible solutions. So please, if are going to downvote, at least provide the correct answer because I have tried out many solutions and nothing is working out.
In my app, I have an EditText inside the fragment which on orientation change, looses its value.One more thing, I am using different layouts for different orientations. Is there any way to retain the fragment data? I am again mentioning "Fragment data".Please find my Fragment code below for further reference.
#Override
public void onSaveInstanceState(Bundle outState) {
outState.putString("fname",etxt_firstname.getText().toString());
outState.putString("lname",etxt_lastname.getText().toString());
super.onSaveInstanceState(outState);
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// retain this fragment
setRetainInstance(true);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if(savedInstanceState!= null)
{
etxt_firstname.setText(savedInstanceState.getString("fname"));
etxt_lastname.setText(savedInstanceState.getString("lname"));
}
}
Inside OnCreateView():
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
shrp_sharedpreferences = myContext.getSharedPreferences("shrp", Context.MODE_PRIVATE);
View view = null;
if(!isTablet(myContext))
{
if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE)
{
view = inflater.inflate(R.layout.fragment_home_landscape, container, false);
}
else
{
view = inflater.inflate(R.layout.fragment_home, container, false);
}
}
else
{
view = inflater.inflate(R.layout.fragment_home, container, false);
}

Even though the fragment itself is retained, its view is destroyed when device is rotated in onDestroyView() (You should also clear any references to views there to prevent leaking old orientation).
Trying to restore text in onActivityCreated() does nothing because you're referencing views from old orientation, and they aren't used anymore.
When fragment is reattached (in Activity created for new orientation), new View is created in onCreateView() - this is where you can use savedInstanceState or any fragment fields to restore views to previous state:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// (...) your layout inflation and view binding logic...
if(savedInstanceState != null){
etxt_firstname.setText(savedInstanceState.getString("fname"));
etxt_lastname.setText(savedInstanceState.getString("lname"));
}
// return view you inflated
}

Fragment layout in android

I am using Fragment layout in my app. but I want to use The code that I written in Oncreate Bundle, so how I can write my code in OncreateView.
here is the code of fragment layout.
public class Text extends Fragment {
public Text(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.text_to_speech, container, false);
return rootView;
}
so where I have to use oncreate bundle, or can I write same code in OncreateView.
help. Thanks.

You can get bundle like below if you passed some data by bundle.
Bundle bundle = getArguments();

We use this method for it.
public void onActivityCreated(Bundle savedInstanceState1) {
super.onActivityCreated(savedInstanceState1);
}

Here the full description about Fragment lifeCycle
Meanwhile, onCreateView must get the view from the Activity. here some usefull tutorial
wish that was helpfull

Fragment class doesn't have oncreate() method.You can write code in oncreateView().Check the Fragment lifecycle. Follow the link below
http://developer.android.com/guide/components/fragments.html

TextViews lost during rotation

I have tried a every solution I can find and am not having any luck. I have multiple dynamic textViews that change not only text but formatting such as alpha, strike-through... I can not find a reliable way to save this information through screen rotation. I am self taught and new my head is spinning...
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new UIrFragment())
.commit();
}
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
setRetainInstance(true);
Log.i(Tag, "onCreateView");
return rootView;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
ImageView background = (ImageView) getView().findViewById(R.id.background);
background.setImageResource(R.drawable.starrynightblurry);
setupKeyBoard(); // multiple textViews get set up here. Want to save this
setupGame();// same here
}

Apparently when using setRetainInstance(true), the Bundle for onRestoreInstanceState is null.
store text views in
#Override
public void onSaveInstanceState(Bundle outState)
{
super.onSaveInstanceState(outState);
//store here
}
Restore text view from here
#Override
public void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
// restore here
}
hope this helps you

Add below line in activity_main.xml
<activity android:name=".MainActivity"
android:configChanges="keyboardHidden|orientation" >

either fix screen orientation to either landscape or portrait in your AndroidManifest.xml like this:
android:screenOrientation="portrait"
or handle the configChanges like this:
android:configChanges="orientation|keyboardHidden|smallestScreenSize|uiMode"
should be added as an attribute of the <activity> tag in the manifest. The configChanges is used to specify configuration changes that the activity will handle itself.
Edit: for handling config changes in Fragments, please see this question.

Save simple variable in Android Fragment

this is my issue, when I create a fragment in android for example let's Say:
GastosSectionFragment gastosFragment = new GastosSectionFragment();
Fragment.gastosFragment.darUserID(userKey);
I send a simple Integer to that activity, no problem. For example lets say I send the number 1. It will be stored in attribute inside that class, because I create the fragment.
Everything will work fine, I receive the number. But when I rotate the phone, the variable "userKEY will be lost, it will converted to cero" I can't save that number when I rotate horizontally my phone, how can I save the data of that variable.
Here I put the code of how I recieve the "userKey" inside the Fragment,
public long darUserID(long userKey) {
// TODO Auto-generated method stub
return user_id = userKey;
}
And the attribute with the onCreate method.
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_section_gastos,
container, false);
idStatico = darUserID(user_id);
And I can't save that little number. this is not a FragmentActivity, this class is just a FRAGMENT. First time fine, rotate screen lost the number that I previously recieve. Fragment doesn't have OnSaveBundleInstances.

Fragment can save user_id in bundle in onSaveInstanceState method and restore after orientation change in onCreateView method. Check this fragment guide, especially in example is shown saving fragment state.
Activity code stays the same (I just changed method name) and your fragment should look like this:
class GastosSectionFragment extends Fragment {
private static final String BUNDLE_USER_ID = "BUNDLE_USER_ID";
private long user_id;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_section_gastos, container, false);
if (savedInstanceState != null)
user_id = savedInstanceState.getLong(BUNDLE_USER_ID);
// now is your user_id restored after orientation change,
// so you can do some stuff with it
return rootView;
}
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putLong(BUNDLE_USER_ID, user_id);
}
public long setUserID(long userKey) {
this.user_id = userKey;
}
}

#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
add method override, and you variable saving state

After KOSO answer, this is how I solve the problem, hope it helps someone else.
When I create the Fragment for first time everything work well, send the userKey, everything is fine.
GastosSectionFragment gastosFragment = new GastosSectionFragment();
Fragment.gastosFragment.darUserID(userKey);
Now in order to fix that, a fragment when the phone is rotated, for example to horizontal it will call the override method OnCreateView(). Everytime when you rotate the phone this method will be called.
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View rootView = inflater.inflate(R.layout.fragment_section_gastos,
container, false);
//This is not null when we rotate the screen, first we save the Bundle SavedInstance
//After do that we put a integer, in this case the userKey
//then we recover the user key, and everything will work fine.
if (savedInstanceState != null)
{
this.savedInstanceState = savedInstanceState;
savedInstanceState.putInt("userKey", (int) idStatico);
idStatico = savedInstanceState.getInt("userKey");
}
//this will be null for the first time, only the first time this will bse used.
if (savedInstanceState == null)
{
idStatico = darUserID(user_id);
}
//Do the rest of the work
}

Android, Super not called exception error

I have two fragments, MyFirst fragment and MySecond fragment. MySecond fragment extends from MyFirst fragment.
classed are like this:
public class MyFirstFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
...
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
...
// Check view and map, request to recreate if each of them is null
if(MyFirstFragment.this.getView() == null || googleMap == null) {
Toast.makeText(getActivity().getApplicationContext(), R.string.my_message, Toast.LENGTH_LONG).show();
return;
}
}
}
public class MySecondFragment extends MyFirstFragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
...
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
...
}
}
My problem is super.onActivityCreated(savedInstanceState); in onActivityCreated() method of MySecondFragment calls its super. Since I want to hide functionality of this method in super class (Which is not useful for this fragment) I have added onActivityCreated() method in MySecondFragment.
The problem is if I remove this line then I have run-time error that throws "SuperNotCalledException".
What you think? seems I have to extend Fragment class instead of extending MyFirstFragment.
I have some variables in MyFirstFragment that I need them in MySecondFragment.

You can write a new Function testFunction(Bundle savedInstanceState) in your MyFirstFragment in which call super.onActivityCreated(savedInstanceState);
And in your MySecondFragment's onActivityCreated call this testFunction(Bundle savedInstanceState) rather than super.onActivityCreated(savedInstanceState);
i.e.
in MyFirstFragment
testFunction(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
}
in MySecondFragment
public void onActivityCreated(Bundle savedInstanceState) {
super.testFunction(savedInstanceState);
...
}
i don't clearly understand your basic requirment to bypass the MyFirstFragment's onActivityCreated but you can do this way.

You need to call the Fragment's implementation regardless. If you don't want to call MyFirstFragment's implementation there's a few solutions:
The cleanest one, give MyFirstFragment and MySecondFragment a common ancestor, which will be pretty much MyFirstFragment , except for onActivityCreated(). Both activities will inherit directly from it.
call super, but add a variable to the bundle to let MyFirstFragment know that its implementation is not to be called this time.
Just extend Fragment in MySecondFragment

You should always call the super method. Just set the variables you need in the MySecondFragment.onActivityCreated() method and use them afterwards. To hide functionality you can always check the calling object class but this goes against the OOP inheritance principles.