For a reason no elements get changed and some do not.
A Fragment called QuestionFragment is in an Action called QuizAction.
The fragment gets replaced in the OnCreate of the Action.
In the fragment I try to add radiobuttons and change text but all fail.
All text that involves "it works" do work and do change the fragment elements.
All text tot involve "it does not work" do not change anything.
What am I doing wrong?
personally: I guess it has to do with the first fragment declared in the xml file of the activity that is actually edited but the second one does not. The one that I should see but never actually do. I also do not know how to check this.
Anyhow this is my code.
In OnCreate of the activity:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz);
if (manager == null) manager = getSupportFragmentManager();
Bundle args = new Bundle();
args.putStringArray("Possible Ansers", PossibleAnsers);
args.putSerializable("protocol", p);
fragment = new QuestionFragment();
fragment.setArguments(args);
ft= manager.beginTransaction();
ft.replace(R.id.fragment,fragment).commit();
}
In the onViewCreated of the QuestionFragment:
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
Bundle bundle = getArguments();
String[] antw = new String[0];
rg = (RadioGroup) getView().findViewById(R.id.radioGroup);
tv = (TextView) getView().findViewById(R.id.smallTekst);
tv.setText("works");
if(bundle != null) {
if( bundle.getStringArray("PossibleAnsers") != null) {
antw = bundle.getStringArray("PossibleAnsers");
}
}
for(int i = 0; i < antw.length; i++) {
addRadioButton(c, rg, "radiobutton "+i +"that doesn't work");
Toast.makeText(c, "rdm toast that works", Toast.LENGTH_LONG).show();
tv.setText("Doesn't work");
}
addRadioButton(c, rg, "working radioButton");
super.onViewCreated(view, savedInstanceState);
}
Already a big thanks.
Related
I have a tabhost with several tabs and each tab contain a certain number of operations which are listed in a listview. To populate that listview I use an ArrayList.
First time tabs are created evertything works fine. The issue comes when I try to filter the list by year. The process of filtering works fine as I can see the filtered list in debug and it's fine.
The issue is that after filtering, i recreate the tabs in order to fill all listviews again. To open tabs I use this code. It creates as many tabs as different currencies there are in the list:
public static void openFragments(FragmentTabHost tabHost, ArrayList<Posicion> positions, Class FragmentResumen, Class FragmentDetails ) {
//==========================================================================================
// This method open as many tabs as different currencies there are in positions list
//==========================================================================================
ArrayList<String> currencies = Currency.getDifferentCurrencies(positions);
tabHost.clearAllTabs();
for (int i = 0; i < currencies.size() + 1; i++) {
String tabName = "", tabSpec = "";
Class fragmentToOpen;
Bundle arg1 = new Bundle();
//A general tab is first created
if (i == 0)
{
tabName = "All";
tabSpec = "General";
arg1.putString("moneda", tabName);
arg1.putSerializable("posiciones", positions);
fragmentToOpen = FragmentResumen;
}
//The rest of tabs for currencies are created
else
{
tabName = currencies.get(i - 1);
tabSpec = "Tab" + (i - 1);
arg1.putString("moneda", tabName);
arg1.putSerializable("posiciones", positions);
fragmentToOpen = FragmentDetails;
}
tabHost.addTab(tabHost.newTabSpec(tabSpec).setIndicator(tabName), fragmentToOpen, arg1);
}
}
As I told before, this works fine always.
First time I need to create tabs I call it by using:
openFragments(tabHost, positions, FragmentResumenMedio.class, FragmentDetailsMedio.class);
Then I have a button that shows a DatePicker and when user selects a year I close the dialog and redraw tabs as follows:
ArrayList<Posicion> positionsFiltered = General.makeHardCopyOfArrayListPosition(positions);
for(Posicion posicion : positionsFiltered)
{
Boolean matchFilters = filterPositionsByYear(posicion, year + "");
if(matchFilters == false){
positions.remove(posicion);
}
}
General.openFragments(tabHost, positions, FragmentResumenMedio.class, FragmentDetailsMedio.class);
When I debug this last function I can see that positions have the correct value after filtering but when I click the new tab, it shows the list without filtering and I don't know how could I solve this issue.
Thanks a lot.
EDIT
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//Initialize view and tabhost
View rootView = inflater.inflate(R.layout.fragment_medio, container, false);
tabHost = (FragmentTabHost) rootView.findViewById(android.R.id.tabhost);
tabHost.setup(getActivity(), getChildFragmentManager(), android.R.id.tabcontent);
return tabHost;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//onCreatedView is only called the first time so we must ensure that tabhost is not null before adding tabs
if(tabHost == null) {
tabHost = (FragmentTabHost) getView().findViewById(android.R.id.tabhost);
tabHost.setup(getActivity(), getChildFragmentManager(), android.R.id.tabcontent);
}
FloatingActionButton floatingActionButton = (FloatingActionButton) getView().findViewById(R.id.floatingButton);
floatingActionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
positions = new ArrayList<>(positionsFiltered);
createDialogWithoutDateField().show();
}
});
//Check if any update has been made since the last open
SharedPreferences prefs = getActivity().getPreferences(MODE_PRIVATE);
Boolean updateMedioRequired = prefs.getBoolean(updateOperationsMedioPlazo, true);
if (updateMedioRequired != null)
{
if (updateMedioRequired == true)
{
//Update variable that indicates if changes have been made or not
SharedPreferences.Editor editor = getActivity().getPreferences(MODE_PRIVATE).edit();
editor.putBoolean(updateOperationsMedioPlazo, false);
editor.apply();
//Check if there are previously stored operations
if (operations.size() > 0)
{
//Show a progressDialog as prices have to be downloaded from internet and this can be a time consumming task
progress = ProgressDialog.show(getActivity(), "Obteniendo precios",
"Un momento por favor...", true);
//Generate positions from operations list and wait for result in "onStockPriceResult". If there are no changes, positions variable has already values
if(positions.size() == 0) {
new Thread(new Runnable() {
#Override
public void run() {
positions = MedioPlazoCalculations.generatePositions(listener, getActivity(), operations);
}
}).start();
}
}
else
{
Toast.makeText(getActivity(), "Aún no se ha introducido ninguna operación", Toast.LENGTH_LONG).show();
}
}
else
{
//If no update needed, variable coming from MainActivity has positionList. Open as many new fragments as currencies there are in positionsList
General.openFragments(tabHost, positions, FragmentResumenMedio.class, FragmentDetailsMedio.class);
}
}
}
EDIT 2:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
{
if(getActivity()!=null)
{
Bundle bundle = this.getArguments();
positions = (ArrayList<Posicion>) bundle.getSerializable("posiciones");
moneda = (String) bundle.getString("moneda");
}
}
}
Edit 3: If I place the commented instruction, filtering does not work. If I remove it, filtering works but I cant filter again because the value of the list has the filtered version not the original one
floatingActionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
positions = new ArrayList<>(positionsFiltered);
createDialogWithoutDateField().show();
}
});
I would like to save and restore data in an fragment after that screen orentation has changed.
For that, I use "onSaveInstanceState" method to save my data.
#Override
public void onSaveInstanceState(Bundle outState) {
outState.putString("date", dateTextView.getText().toString());
outState.putString("time", timeTextView.getText().toString());
outState.putString("hour", hour);
outState.putString("minute", minute);
outState.putString("topicGroup", currentTopicGroup);
outState.putString("topic", currentTopicTitle);
outState.putString("level",currentLevelName);
outState.putDouble("totalPrice", totalPrice);
outState.putString("activityTitle", getActivity().getTitle().toString());
super.onSaveInstanceState(outState);
}
But when I try to restore/display my data with the "onCreateView" method like below, nothing happens even if the "savedInstanceState" variable is not null (my logs display the right value).
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_create_new_lesson, container, false);
timeTextView = (TextView) view.findViewById(R.id.time_picker_text_view);
dateTextView = (TextView) view.findViewById(R.id.date_picker_text_view);
hourSpinner = (Spinner) view.findViewById(R.id.hour_spinner);
minuteSpinner = (Spinner) view.findViewById(R.id.minut_spinner);
topicGroupSpinner = (Spinner) view.findViewById(R.id.topic_group_spinner);
topicSpinner = (Spinner) view.findViewById(R.id.topic_spinner);
levelSpinner = (Spinner) view.findViewById(R.id.level_spinner);
totalPriceTextView = (TextView) view.findViewById(R.id.total_price_text_view);
datePickerButton = (Button) view.findViewById(R.id.date_picker_button);
timePickerButton = (Button) view.findViewById(R.id.time_picker_button);
createNewLessonButton = (Button) view.findViewById(R.id.create_new_lesson_button);
if (savedInstanceState != null) {
String time = savedInstanceState.getString("time");
Log.i("TIME", time);
getActivity().setTitle(time);
dateTextView.setText(savedInstanceState.getString("date"));
timeTextView.setText(savedInstanceState.getString("time"));
int hourPosition = getIndexByString(hourSpinner, savedInstanceState.getString("hour"));
int minutePosition = getIndexByString(minuteSpinner, savedInstanceState.getString("minute"));
int topicGroupPosition = getIndexByString(topicGroupSpinner, savedInstanceState.getString("topicGroup"));
hourSpinner.setSelection(hourPosition);
minuteSpinner.setSelection(minutePosition);
topicGroupSpinner.setSelection(topicGroupPosition);
}
return view;
}
I try many things without success. Would anyone have any advice to give me ? Thanks in advance.
The problem is in the place where you are trying to restore the state of your views.
Take a look:
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
...
if (savedInstanceState != null) {
//Restore the fragment's state here
}
}
...
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
//Save the fragment's state here
}
The topic has already been commented on StackOverflow in depth.
Just take a look and you will find a lot about the savedState and restoring it. Fragment's SavedState and Restoring It
The problem is every time a new Fragment instance with empty bundle data is created and added. While adding a new Fragment in the activity do as below
In onCreate() of activity or wherever you add the fragment do as below
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction().add(R.id.frag_container, new Frag1()).commit();
}
I am new at using fragments. This is how I am passing StringArrayList inside bundle in the onActivityCreated of first fragment in sliding tab
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
next_personal = (Button) getActivity().findViewById(R.id.personal_next);
next_personal.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
validate();
}
});
}
private void validate() {
isValid = FormValidator.validate(this, new SimpleErrorPopupCallback(getActivity().getApplicationContext(), true));
if (isValid) {
arrayList = new ArrayList<String>();
arrayList.add(memID.getText().toString());
arrayList.add(idNumber.getText().toString());
arrayList.add(firstName.getText().toString());
arrayList.add(secondName.getText().toString());
arrayList.add(lastName.getText().toString());
arrayList.add(secondLastName.getText().toString());
Bundle bundle = new Bundle();
bundle.putStringArrayList("personal",arrayList);
Log.d("bundle",": "+bundle.toString());
FragContactInfo frag = new FragContactInfo();
frag.setArguments(bundle);
((RegisterTabActivity) getActivity()).setCurrentItem(1, true);
}
}
And then I am trying to get the ArrayList in the third fragment of sliding tab as below:
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Bundle bundle = getArguments();
if (bundle != null && bundle.containsKey("personal")) {
ArrayList<String> userId = bundle.getStringArrayList("personal");
}
else{
Toast.makeText(getActivity(),"Bundle is null",Toast.LENGTH_SHORT).show();
}
}
It keeps on returning null. Did the same inside onCreateView of both fragments, same result. What am I getting wrong here?
Using bundle did not help in parsing data between fragments (Somehow)
So I simply created method to set and get data in target fragment.
public void setPdata(JSONObject obj) {
this.personalJSON = obj;
}
public JSONObject getPdata() {
return personalJSON;
}
Then I called the set method to set json in sender fragment.
FragContactInfo frag = new FragContactInfo();
frag.setPdata(json);
And then access the json by simply calling get method.
array1 = getPdata().getJSONArray("args");
If anyone has a more productive solution, please do tell. Happy Coding.
I have an activity that has a huge form with lots of EditTexts. If the user rotates the screen from portrait to landscape or vice-versa, all the data in the EditTexts is lost. Is there some way to retain the data so that it is not lost while changing the orientation?
I have created 2 layouts, one each for portrait and landscape. I also have the same IDs for all the Views in both the layouts.
Thanks in advance.
Save your state like this by implementing the following methods in your activity
/* simple method to create a key for a TextView using its id */
private String keyForTextView(TextView txt){
return "textView"+txt.getId();
}
/* go through all your views in your layout and save their values */
private void saveTextViewState(ViewGroup rootView, Bundle bundle){
int children = rootView.getChildCount();
for (int i = 0; i < children; i++) {
View view = rootView.getChildAt(i);
if (view instanceof TextView){
TextView txt = (TextView)view;
if (txt.getText() != null){
bundle.putString(keyForTextView(txt), txt.getText().toString());
}
}else if (view instanceof ViewGroup){
saveTextViewState((ViewGroup)view, bundle);
}
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
View root = findViewById(R.id.my_root_view); //find your root view of your layout
saveTextViewState(root, outState); //save state
super.onSaveInstanceState(outState);
}
and then retrieve the values in the onCreate method of your activity.
/* go through all your views in your layout and load their saved values */
private void loadTextViewState(ViewGroup rootView, Bundle bundle){
int children = rootView.getChildCount();
for (int i = 0; i < children; i++) {
View view = rootView.getChildAt(i);
if (view instanceof TextView){
TextView txt = (TextView)view;
String saved = bundle.getString(keyForTextView(txt));
txt.setText(saved);
}else if (view instanceof ViewGroup){
loadTextViewState((ViewGroup)view, bundle);
}
}
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//... inflate your UI here
if (savedInstanceState != null){
View root = findViewById(R.id.my_root_view); //find your root view
loadTextViewState(root, savedInstanceState); //load state
}
}
For this to work all the textboxes must have ids in both landscape and portrait layouts.
Yes. You can get the data of EditTexts using below code:
In onCreate() method,
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int ot = getResources().getConfiguration().orientation;
switch (ot) {
case Configuration.ORIENTATION_LANDSCAPE:
setContentView(R.layout.<your_landscape_layout>);
break;
case Configuration.ORIENTATION_PORTRAIT:
setContentView(R.layout.<your_portrait_layout>);
break;
}
setButtonClickListeners();
}
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
int ot = getResources().getConfiguration().orientation;
switch (ot) {
case Configuration.ORIENTATION_LANDSCAPE:
setContentView(R.layout.<your_landscape_layout>);
setButtonOnClickListeners();
initializeViews();
break;
case Configuration.ORIENTATION_PORTRAIT:
setContentView(R.layout.<your_portrait_layout>);
setButtonOnClickListeners();
initializeViews();
break;
}
}
#SuppressWarnings("deprecation")
#Override
public Object onRetainNonConfigurationInstance() {
return super.onRetainNonConfigurationInstance();
}
}
In setButtonOnClickListeners(), you initiatiate all the EditTexts and in initializeViews() get the data of EditTexts and display using setText()
Add android:configChanges="orientation" in your manifest file. Within tag,
<activity
android:name=".YourActivity"
android:configChanges="orientation|keyboardHidden" >
</activity>
Thanks....
I have a Login screen which consists of 2 EditTexts for Username and Password. My requirement is that on orientation change , input data(if any) in EditText should remain as it is and a new layout should also be drawn. I have 2 layout xml files- one in layout folder and other in layout-land folder. I am trying to implement following 2 approaches but none of them is perfect:
(1) configChanges:keyboardHidden - In this approach, I don't provide "orientation" in configChanges in manifest file. So I call setContentView() method in both onCreate() and onConfigurationChanged() methods. It fulfills both my requirements. Layout is changed and input data in EditTexts also remains as it is. But it has a big problem :
When user clicks on Login button, a ProgressDialog shows until server-response is received. Now if user rotates the device while ProgressDialog is running, app crashes. It shows an Exception saying "View cannot be attached to Window." I have tried to handle it using onSaveInstanceState (which DOES get called on orientation change) but app still crashes.
(2) configChanges:orientation|keyboardHidden - In this approach, I provide "orientation" in manifest. So now I have 2 scenarios:
(a) If I call setContentView() method in both onCreate() and onConfigurationChanged(), Layout is changed accordingly but EditText data is lost.
(b) If I call setContentView() method in onCreate() , but not in onConfigurationChanged(), then EditText data is not lost but layout also not changes accordingly.
And in this approach, onSaveInstanceState() is not even called.
So I am in a really intimidating situation. Is there any solution to this problem? Please help. Thanx in advance.
By default, Edittext save their own instance when changing orientation.
Be sure that the 2 Edittexts have unique IDs and have the same IDs in both Layouts.
That way, their state should be saved and you can let Android handle the orientation change.
If you are using a fragment, be sure it has a unique ID also and you dont recreate it when recreating the Activity.
A better approach is to let android handle the orientation change. Android will automatically fetch the layout from the correct folder and display it on the screen. All you need to do is to save the input values of the edit texts in the onSaveInsanceState() method and use these saved values to initialize the edit texts in the onCreate() method.
Here is how you can achieve this:
#Override
protected void onCreate (Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.login_screen);
...
...
String userName, password;
if(savedInstanceState!=null)
{
userName = savedInstanceState.getString("user_name");
password= savedInstanceState.getString("password");
}
if(userName != null)
userNameEdtTxt.setText(userName);
if(password != null)
passEdtTxt.setText(password);
}
>
#Override
protected void onSaveInstanceState (Bundle outState)
{
outState.putString("user_name", userNameEdtTxt.getText().toString());
outState.putString("password", passEdtTxt.getText().toString());
}
Give the element an id and Android will manage it for you.
android:id="#id/anything"
in onConfigurationChanged method, first get the data of both the edit texts in global variables and then call setContentView method. Now set the saved data again into the edit texts.
There are many ways to do this. The simplest is 2(b) in your question. Mention android:configChanges="orientation|keyboardHidden|screenSize" in your manifest so that Activity doesn't get destroyed on Orientation changes.
Call setContentView() in onConfigChange(). but before calling setContentView() get the EditText data into a string and set it back after calling setContentView()
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mEditTextData = mEditText.getText().tostring();//mEditTextData is a String
//member variable
setContentView(R.layout.myLayout);
initializeViews();
}
private void initializeViews(){
mEditText = (EditText)findViewById(R.id.edittext1);
mEdiText.setText(mEditTextData);
}
The following should work and is standard to the activities and fragments
#Override
public void onSaveInstanceState (Bundle outState)
{
outState.putString("editTextData1", editText1.getText().toString());
outState.putString("editTextData2", editText2.getText().toString());
super.onSaveInstanceState(outState);
}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate();
... find references to editText1, editText2
if (savedInstanceState != null)
{
editText1.setText(savedInstanceState.getString("editTextData1");
editText2.setText(savedInstanceState.getString("editTextData2");
}
}
Im restoring instance to restore values and it works fine for me :)
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.addtask2);
if(savedInstanceState!=null)
onRestoreInstanceState(savedInstanceState);
}
Remove android:configChanges attribute from the menifest file and let android handle the orientation change your data in edittext will automatically remain.
Now The problem you mentioned is with the progress dialog force close this is because when the orientation is changed the thread running in backgroud is trying to update the older dialog component whihc was visible. You can handle it by closing the dialog on savedinstancestate method and recalling the proceess you want to perform onRestoreInstanceState method.
Below is a sample hope it helps solving your problem:-
public class MyActivity extends Activity {
private static final String TAG = "com.example.handledataorientationchange.MainActivity";
private static ProgressDialog progressDialog;
private static Thread thread;
private static boolean isTaskRunnig;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate");
setContentView(R.layout.main);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new EditText.OnClickListener() {
#Override
public void onClick(View v) {
perform();
isTaskRunnig = true;
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void perform() {
Log.d(TAG, "perform");
progressDialog = android.app.ProgressDialog.show(this, null,
"Working, please wait...");
progressDialog
.setOnDismissListener(new DialogInterface.OnDismissListener() {
#Override
public void onDismiss(DialogInterface dialog) {
//isTaskRunnig = false;
}
});
thread = new Thread() {
public void run() {
Log.d(TAG, "run");
int result = 0;
try {
// Thread.sleep(5000);
for (int i = 0; i < 20000000; i++) {
}
result = 1;
isTaskRunnig = false;
} catch (Exception e) {
e.printStackTrace();
result = 0;
}
Message msg = new Message();
msg.what = result;
handler.sendMessage(msg);
};
};
thread.start();
}
// handler to update the progress dialgo while the background task is in
// progress
private static Handler handler = new Handler() {
public void handleMessage(Message msg) {
Log.d(TAG, "handleMessage");
int result = msg.what;
if (result == 1) {// if the task is completed successfully
Log.d(TAG, "Task complete");
try {
progressDialog.dismiss();
} catch (Exception e) {
e.printStackTrace();
isTaskRunnig = true;
}
}
}
};
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
Log.d(TAG, "onRestoreInstanceState" + isTaskRunnig);
if (isTaskRunnig) {
perform();
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Log.d(TAG, "onSaveInstanceState");
if (thread.isAlive()) {
thread.interrupt();
Log.d(TAG, thread.isAlive() + "");
progressDialog.dismiss();
}
}
As pointed out by Yalla T it is important to not recreate the fragment. The EditText will not lose its content if the existing fragment is reused.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_frame);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// Display the fragment as the main content.
// Do not do this. It will recreate the fragment on orientation change!
// getSupportFragmentManager().beginTransaction().replace(android.R.id.content, new Fragment_Places()).commit();
// Instead do this
String fragTag = "fragUniqueName";
FragmentManager fm = getSupportFragmentManager();
Fragment fragment = (Fragment) fm.findFragmentByTag(fragTag);
if (fragment == null)
fragment = new Fragment_XXX(); // Here your fragment
FragmentTransaction ft = fm.beginTransaction();
// ft.setCustomAnimations(R.xml.anim_slide_in_from_right, R.xml.anim_slide_out_left,
// R.xml.anim_slide_in_from_left, R.xml.anim_slide_out_right);
ft.replace(android.R.id.content, fragment, fragTag);
// ft.addToBackStack(null); // Depends on what you want to do with your back button
ft.commit();
}
Saving state = Saving (Fragment State + Activity State)
When it comes to saving the state of a Fragment during orientation change, I usually do this way.
1) Fragment State:
Save and Restore EditText value
// Saving State
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("USER_NAME", username.getText().toString());
outState.putString("PASSWORD", password.getText().toString());
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.user_name_fragment, parent, false);
username = (EditText) view.findViewById(R.id.username);
password = (EditText) view.findViewById(R.id.password);
// Retriving value
if (savedInstanceState != null) {
username.setText(savedInstanceState.getString("USER_NAME"));
password.setText(savedInstanceState.getString("PASSWORD"));
}
return view;
}
2) Activity State::
Create a new Instance when the activity launches for the first time
else find the old fragment using a TAG and the FragmentManager
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
fragmentManager = getSupportFragmentManager();
if(savedInstanceState==null) {
userFragment = UserNameFragment.newInstance();
fragmentManager.beginTransaction().add(R.id.profile, userFragment, "TAG").commit();
}
else {
userFragment = fragmentManager.findFragmentByTag("TAG");
}
}
You can see the the full working code HERE
Below code is work for me. Need to care two things.
Each Input Field (Edit Text or TextInputEditText) assign unique id.
Manifest activity declaration should have on configuration change attribute with below values.
android:configChanges="orientation|keyboardHidden|screenSize"
Sample activity declaration in manifest.
<activity
android:name=".screens.register.RegisterActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:exported="true"
android:label="Registration"
android:theme="#style/AppTheme.NoActionBar" />
Sample declaration of
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/inputLayout"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:boxCornerRadiusBottomEnd="#dimen/boxCornerRadiusDP"
app:boxCornerRadiusBottomStart="#dimen/boxCornerRadiusDP"
app:boxCornerRadiusTopEnd="#dimen/boxCornerRadiusDP"
app:boxCornerRadiusTopStart="#dimen/boxCornerRadiusDP">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/inputEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:fontFamily="#font/proxima_nova_semi_bold"
android:inputType="textCapWords"
android:lines="1"
android:textColor="#color/colorInputText"
android:textColorHint="#color/colorInputText" />
</com.google.android.material.textfield.TextInputLayout>
this may help you
if your android:targetSdkVersion="12" or less
android:configChanges="orientation|keyboardHidden">
if your android:targetSdkVersion="13" or more
android:configChanges="orientation|keyboardHidden|screenSize">