Develop Reference

LiveData observer triggered after reloading fragment

My MainAcivity hosts 2 fragments, login and register. I have a LiveData observer on LoginFragment that observes user login live data, after which if user is authenticated MainMenuActivity intent will start. On main menu there's logout button that would start MainActivity and load LoginFragment.
But here's the problem, the observer on LoginFragment triggered immediately after loading the fragment, which straight up start MainMenuActivity intent again.
My LoginFragment:
public class LoginFragment extends Fragment {
public static LoginFragment newInstance(){
return new LoginFragment();
}
private LoginViewModel mLoginViewModel;
private LiveData<UserModelJSONPlaceholder> mUserModelLiveData;
private static final String TAG = "FragLogin";
private Button mBtnLogin;
private EditText mTxtUsername, mTxtPass;
private TextView mTxtRegister;
private CheckBox mCheckBoxRemember;
private TextView mTxtInvalid;
private Callbacks mCallbacks = null;
private ProgressBar mProgressBar;
private UserApiInterface mAPIInterface;
private SharedPreferences mSharedPreferences;
private SharedPreferences.Editor mPreferencesEditor;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_login,container,false);
mBtnLogin = view.findViewById(R.id.btnLogin_login);
mTxtUsername = view.findViewById(R.id.txtUsername);
mTxtPass = view.findViewById(R.id.txtPass);
mCheckBoxRemember = view.findViewById(R.id.checkBoxRememberMe);
mTxtRegister = view.findViewById(R.id.txtRegister_login);
mProgressBar = view.findViewById(R.id.progressBar);
mTxtInvalid = view.findViewById(R.id.txtInvalid);
mProgressBar.setVisibility(View.GONE);
mTxtInvalid.setVisibility(View.GONE);
mAPIInterface = APIClient.getClient().create(UserApiInterface.class);
mSharedPreferences = getContext().getSharedPreferences("login",Context.MODE_PRIVATE);
mPreferencesEditor = mSharedPreferences.edit();
setListener();
return view;
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLoginViewModel = new ViewModelProvider(this).get(LoginViewModel.class);
mUserModelLiveData = mLoginViewModel.getUserModelLiveData();
//observer would be triggered right after loading fragment after logout
mUserModelLiveData.observe(this, new Observer<UserModelJSONPlaceholder>() {
#Override
public void onChanged(UserModelJSONPlaceholder userModel) {
Log.d(TAG, "onChanged: Observer: "+userModel.getResponse());
mProgressBar.setVisibility(View.GONE);
String loginAuth = userModel.getResponse();
if(loginAuth.equals("OK")){
mPreferencesEditor.putString("name",userModel.getUserModel().getName());
mCallbacks.login_goMainMenu(userModel.getUserModel().getName());
}else{
mTxtInvalid.setVisibility(View.VISIBLE);
}
}
});
}
private void doLogin(){
mProgressBar.setVisibility(View.VISIBLE);
final String username = mTxtUsername.getText().toString().trim();
final String password = mTxtPass.getText().toString().trim();
mLoginViewModel.authLogin(username,password);
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
mCallbacks = (Callbacks) context;
}
private void setListener(){
mBtnLogin.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
doLogin();
}
});
mTxtRegister.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mCallbacks.login_goRegister();
}
});
mCheckBoxRemember.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(buttonView.isChecked()){
mPreferencesEditor.putBoolean("rememberMe", true).apply();
Log.d(TAG, "onCheckedChanged: Checked");
}else{
mPreferencesEditor.putBoolean("rememberMe", false).apply();
Log.d(TAG, "onCheckedChanged: Unchecked");
}
}
});
}
public interface Callbacks{
void login_goMainMenu(String name);
void login_goRegister();
}
}
My MainMenuActivity:
public class MainMenuActivity extends AppCompatActivity {
private static final String ARG_NAME = "arg_name";
private Button mBtnEnterQ,mBtnCreateQ;
private TextView mTxtName;
private Toolbar mToolbar;
private SharedPreferences mSharedPreferences;
private SharedPreferences.Editor mEditor;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_menu);
mBtnEnterQ = findViewById(R.id.btnEnterQ);
mBtnCreateQ = findViewById(R.id.btnCreateQ);
mTxtName = findViewById(R.id.txtUsername);
mToolbar = findViewById(R.id.toolbar);
mSharedPreferences = getSharedPreferences("login",MODE_PRIVATE);
mEditor = mSharedPreferences.edit();
setSupportActionBar(mToolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.toolbar_menu,menu);
return true;
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.itemLogout:
doLogout();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void doLogout(){
mEditor.remove("rememberMe");
mEditor.apply();
Intent i = new Intent(this, MainActivity.class);
startActivity(i);
finish();
}
}
and here's my ViewModel and Repo for LoginFragment:
public class LoginViewModel extends ViewModel {
private static final String TAG = "LoginVM";
private UserRepository mUserRepository;
LiveData<UserModelJSONPlaceholder> mUserModelLiveData;
public LoginViewModel() {
mUserRepository = UserRepository.getInstance();
}
public void authLogin(String username, String password){
mUserRepository.authLogin(username,password);
}
public LiveData<UserModelJSONPlaceholder> getUserModelLiveData() {
return mUserRepository.getUserModelLiveData();
}
}
public class UserRepository {
private static UserRepository instance;
private static final String TAG = "RepoUser";
private UserApiInterface mUserApiInterface;
MutableLiveData<UserModelJSONPlaceholder> userModelLiveData;
public static UserRepository getInstance(){
if(instance==null){
instance=new UserRepository();
}
return instance;
}
private UserRepository(){
mUserApiInterface = APIClient.getClient().create(UserApiInterface.class);
Log.d(TAG, "UserRepository: repoInit");
}
public void authLogin(String username, String password){
Log.d(TAG, "authLogin: REQUEST INIT");
Log.d(TAG, "authLogin: SERVER: "+ CONFIG.SERVER);
mUserApiInterface.getUser(username,password).enqueue(new Callback<UserModelJSONPlaceholder>() {
#Override
public void onResponse(Call<UserModelJSONPlaceholder> call, Response<UserModelJSONPlaceholder> response) {
if(response.isSuccessful()){
UserModelJSONPlaceholder r = response.body();
userModelLiveData.postValue(response.body());
}else{
Log.d(TAG, "onResponse: FAILED. "+response.errorBody());
}
}
#Override
public void onFailure(Call<UserModelJSONPlaceholder> call, Throwable t) {
Log.d(TAG, "onFailure: "+t.getMessage());
}
});
}
public LiveData<UserModelJSONPlaceholder> getUserModelLiveData() {
if(userModelLiveData == null)
userModelLiveData = new MutableLiveData<>();
return userModelLiveData;
}
}

Your problems is you make UserRepository is Singleton instance and always keep value of userModelLiveData easy way to fix it change method to this
public LiveData<UserModelJSONPlaceholder> getUserModelLiveData() {
userModelLiveData = new MutableLiveData<>();
return userModelLiveData;
}

How to create a callback from MainActivity to a fragment?

I am trying to create a callback from MainActivity to a fragment.
In MainActivity I have 5 tabs. Each tab has a different UI through a fragment. The fragments are added via viewpager. My objective is to inform a fragment when an ad has been loaded in MainAcitivty. After the fragment gets the message it can then display the add itself by calling a method of MainActivity. At the moment I dont want to send any message back to MainActivity.
The code of the MainActivity is:
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private DrawerLayout drawer;
private ViewPager viewPager = null;
private RewardedVideoAd mRewardedVideoAd;
private NavigationView navigationView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
this.setTitle(R.string.app_title);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText(R.string.Tab1));
tabLayout.addTab(tabLayout.newTab().setText(R.string.Tab2));
tabLayout.addTab(tabLayout.newTab().setText(R.string.Tab3));
tabLayout.addTab(tabLayout.newTab().setText(R.string.Tab4));
tabLayout.addTab(tabLayout.newTab().setText( R.string.Tab5));
viewPager = (ViewPager) findViewById(R.id.pager);
final PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
drawer = (DrawerLayout) findViewById(R.id.drawerLayout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
//handling navigation view item event
navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setItemIconTintList(null);
assert navigationView != null;
navigationView.setNavigationItemSelectedListener(this);
MobileAds.initialize(this, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
mRewardedVideoAd = MobileAds.getRewardedVideoAdInstance(this);
mRewardedVideoAd.setRewardedVideoAdListener(new RewardedVideoAdListener() {
#Override
public void onRewarded(RewardItem rewardItem) {
Toast.makeText(getApplication(),"Ad Rewarded.", Toast.LENGTH_SHORT).show();
loadRewardedVideoAd();
}
#Override
public void onRewardedVideoAdLoaded() {
Toast.makeText(getApplication(),"Ad loaded.", Toast.LENGTH_SHORT).show();
}
#Override
public void onRewardedVideoAdOpened() {
Toast.makeText(getApplication(),"Ad opened.", Toast.LENGTH_SHORT).show();
}
#Override
public void onRewardedVideoStarted() {
Toast.makeText(getApplication(),"Ad started", Toast.LENGTH_SHORT).show();
}
#Override
public void onRewardedVideoCompleted() {
Toast.makeText(getApplication(),"Ad completed.", Toast.LENGTH_SHORT).show();
}
#Override
public void onRewardedVideoAdClosed() {
Toast.makeText(getApplication(),"Ad closed.", Toast.LENGTH_SHORT).show();
}
#Override
public void onRewardedVideoAdLeftApplication() {
Toast.makeText(getApplication(),"Ad left application.", Toast.LENGTH_SHORT).show();
}
#Override
public void onRewardedVideoAdFailedToLoad(int i) {
Toast.makeText(getApplication(),"Ad failed to load.", Toast.LENGTH_SHORT).show();
}
});
loadRewardedVideoAd();
}
public void loadRewardedVideoAd() {
mRewardedVideoAd.loadAd("xxxxxxxxxxxxxxxxxxxxxxxxxxxx",new AdRequest.Builder().build());
}
public void showRewardedVideoAd() {
mRewardedVideoAd.show();
}
#Override
public void onResume() {
mRewardedVideoAd.resume(getParent());
super.onResume();
}
#Override
public void onPause() {
mRewardedVideoAd.pause(getParent());
super.onPause();
}
#Override
public void onDestroy() {
mRewardedVideoAd.destroy(getParent());
super.onDestroy();
}
public interface onToggledListener{
void onToggled();
}
private onToggledListener toggledListener;
public void setOnToggledlistener(onToggledListener listener){
toggledListener = listener;
}
}//end of MainActivity
The code of the fragment is:
public class Tab1 extends Fragment implements MainActivity.onToggledListener {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.tab1, container, false);
buttonVideo = (Button) view.findViewById(R.id.videoAd);
fab =(FloatingActionButton) view.findViewById(R.id.fab);
return view;
}
//method implemented here
#Override
public void onToggled(){
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
buttonVideo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
showad();// some method
}
});
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
add();//some method
}
});
}
#Override
public void onResume() {
super.onResume();
}
#Override
public void onPause() {
super.onPause();
}
#Override
public void onDestroy() {
super.onDestroy();
}
}// end of fragment class
This is how I am trying to achieve my objective but I am not getting the result. Callback is not working

You not call method setOnToggledlistener which initialize your interface & then you can get call back from MainActivity to Fragment.
So, call setOnToggledlistener from activity .

In activity ：
#Override
public void onRewardedVideoAdLoaded() {
toggledListener.onToggled(); //trigger callback when video loaded.
}
In fragment：
#Override
public void onResume() {
super.onResume();
getActivity().setOnToggledlistener(this); //register callback
}

How to refresh RecyclerView from button on DialogFragment

I have an application with a RecyclerView and a DialogFragment, in the Dialog I add data to the database and display it in the RecyclerView. I tried to refresh the RecyclerView when I clicked in to add.
This is the Fragment
public class addAction extends DialogFragment implements View.OnClickListener {
EditText addTitle, addDesc;
Button add, clear,close;
Context context;
private DatabaseHelpher db;
String Title,Des;
public addAction() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.addaction, container, false);
addTitle = (EditText) rootView.findViewById(R.id.todotitle);
addDesc = (EditText) rootView.findViewById(R.id.tododescription);
add = (Button) rootView.findViewById(R.id.addbutton);
add.setOnClickListener(this);
close = (Button) rootView.findViewById(R.id.Close);
close.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dismiss();
}
});
clear = (Button) rootView.findViewById(R.id.clear);
clear.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
addTitle.setText("");
addDesc.setText("");
}
});
return rootView;
}
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
getDialog().setTitle("Add Action");
db = new DatabaseHelpher(getContext());
}
private void insert() {
Title = addTitle.getText().toString();
Des= addDesc.getText().toString();
db.insertIntoDB(Title, Des);
}
#Override
public void onClick(View v) {
if (addTitle.getText().toString().trim().equals("")) {
addTitle.setError(" Title is required!");
} else if (addDesc.getText().toString().trim().equals("")) {
addDesc.setError(" Postion is required!");
}
insert();
}
}
and this is the MainActivity
public class MainActivity extends AppCompatActivity {
List<ToDoModule> dbList;
RecyclerView mRecyclerView;
DatabaseHelpher helpher;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().hide();
helpher = new DatabaseHelpher(this);
dbList= new ArrayList<ToDoModule>();
dbList = helpher.getDataFromDB();
mRecyclerView = (RecyclerView)findViewById(R.id.AppRecyclerView);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);
mAdapter = new RecyclerAdapter(this,dbList);
mAdapter.notifyDataSetChanged();
mRecyclerView.setAdapter(mAdapter);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setImageResource(R.drawable.ic_action_name);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
FragmentManager fm = getSupportFragmentManager();
addAction add = new addAction();
add.show(fm, "fragment_edit_name");
}
});}
#Override
protected void onResume() {
super.onResume();
dbList = helpher.getDataFromDB();
mAdapter.notifyDataSetChanged();
}
}

Call mAdapter.notifyDataSetChanged(); in your Activity's onResume() method.

First Solution
cast activity and call your method like this:
in your activity add this method
public void myMethod(){
runOnUiThread(new Runnable() {
#Override
public void run() {
//your code here
}
});
}
in your DialogFragment call the activity method after you cast it.
((YourActivity)getActivity()).myMethod();
Second Solution
add eventbus to your gradle
compile 'org.greenrobot:eventbus:3.0.0'
make a class that you want to pass to activity
public class MessageEvent {
public final String message;
public MessageEvent(String message) {
this.message = message;
}
}
listen to events in your activity
// This method will be called when a MessageEvent is posted (in the UI thread for Toast)
#Subscribe(threadMode = ThreadMode.MAIN)
public void onMessageEvent(MessageEvent event) {
Toast.makeText(getActivity(), event.message, Toast.LENGTH_SHORT).show();
}
register EventBus in your Activity
#Override
public void onStart() {
super.onStart();
EventBus.getDefault().register(this);
}
#Override
public void onStop() {
EventBus.getDefault().unregister(this);
super.onStop();
}
finally send in Event from Dialog to your Activity
EventBus.getDefault().post(new MessageEvent("Hello everyone!"));
don't forgot adding this to proguard file
-keepattributes *Annotation*
-keepclassmembers class ** {
#org.greenrobot.eventbus.Subscribe <methods>;
}
-keep enum org.greenrobot.eventbus.ThreadMode { *; }

setDisplayHomeAsUpEnabled() not working in PreferenceActivity

I have a SettingsActivity which extends PreferenceActivity to show settings in my app.
There is a back arrow, but it is not working.
Here's SettingsActivity.java file's code:
public class SettingsActivity extends PreferenceActivity implements SharedPreferences.OnSharedPreferenceChangeListener{
private AppCompatDelegate mDelegate;
public static final String RESET_PASSWORD_KEY = "reset_password";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
getDelegate().installViewFactory();
getDelegate().onCreate(savedInstanceState);
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
SharedPreferences sharedPreferencesCompat = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
Preference myPref = (Preference) findPreference(RESET_PASSWORD_KEY);
myPref.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
//open browser or intent here
Intent resetPasswordActivityIntent = new Intent(SettingsActivity.this, ResetPasswordActivity.class);
startActivity(resetPasswordActivityIntent);
return true;
}
});
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
getDelegate().onPostCreate(savedInstanceState);
}
public ActionBar getSupportActionBar() {
return getDelegate().getSupportActionBar();
}
public void setSupportActionBar(#Nullable Toolbar toolbar) {
getDelegate().setSupportActionBar(toolbar);
getDelegate().getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
#Override
public MenuInflater getMenuInflater() {
return getDelegate().getMenuInflater();
}
#Override
public void setContentView(#LayoutRes int layoutResID) {
getDelegate().setContentView(layoutResID);
}
#Override
public void setContentView(View view) {
getDelegate().setContentView(view);
}
#Override
public void setContentView(View view, ViewGroup.LayoutParams params) {
getDelegate().setContentView(view, params);
}
#Override
public void addContentView(View view, ViewGroup.LayoutParams params) {
getDelegate().addContentView(view, params);
}
#Override
protected void onPostResume() {
super.onPostResume();
getDelegate().onPostResume();
}
#Override
protected void onTitleChanged(CharSequence title, int color) {
super.onTitleChanged(title, color);
getDelegate().setTitle(title);
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
getDelegate().onConfigurationChanged(newConfig);
}
#Override
protected void onStop() {
super.onStop();
getDelegate().onStop();
}
#Override
protected void onDestroy() {
super.onDestroy();
getDelegate().onDestroy();
}
public void invalidateOptionsMenu() {
getDelegate().invalidateOptionsMenu();
}
private AppCompatDelegate getDelegate() {
if (mDelegate == null) {
mDelegate = AppCompatDelegate.create(this, null);
}
return mDelegate;
}
#Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
if (key.equals(RESET_PASSWORD_KEY)) {
}
}
}
Here's preferences.xml file's code:
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<Preference
android:title="xxx"
android:summary="xxxxxx"
android:key="reset_password" />
</PreferenceScreen>
Here's how 'SettingsActivity' is defined in AndroidManifest.xml:
<activity
android:name=".SettingsActivity"
android:label="#string/title_activity_settings"
android:parentActivityName=".MainActivity">
</activity>
How can I make that arrow operational?
Please let me know.
Sorry, if question format seems inappropriate. I'm still a beginner.

You need to call your private method setSupportActionBar() inside onCreate().
Also, you might want to implement onOptionsItemSelected:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
}
return super.onOptionsItemSelected(item);
}

You can do it like this
#Override
public boolean onSupportNavigateUp() {
onBackPressed();
return true;
}

I have made some assumptions on what you might be trying to achieve. This should work if you want to use a custom toolbar with PreferenceActivity. The following code goes inside onPostCreateView()
LinearLayout root = (LinearLayout)findViewById(android.R.id.list).getParent().getParent().getParent();
mToolBar = (Toolbar) LayoutInflater.from(this).inflate(R.layout.toolbar, root,false);
mToolBar.setTitle(R.string.title);
// insert at top
root.addView(mToolBar, 0);
setSupportActionBar(mToolBar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);

You forgot to call this method in your onCreate()
getSupportActionBar().setDisplayHomeAsUpEnabled(true);

In Android targetSdkVersion 29
inside onCreate()
getActionBar().setDisplayHomeAsUpEnabled(true);
then implement onOptionsItemSelected from #Matias Elorriaga Answer

If all else fails, try calling setDisplayHomeAsUpEnabled() twice with different arguments:
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(false);

Half of the lifecycle methods of fragment get not called after rotation

I'm experiencing an strange behavior of Fragment life-cycle each time that i rotate the screen. Only the first half of life-cycle methods are getting called, onPause,onSaveInstanceState,onStop, onDestroyView,onDestroy and onDetach. The other half (onAttach ...-onResume) are not getting called. The Activity associated with the Fragment is calling all its life-cycle methods.
Any help would be highly appreciated because I'm stuck on this issue.
Thanks in advance.
Here the entire code of the Activity and the static nested class where is the Fragment:
public class MoviesFeed extends AppCompatActivity {
private static boolean mTwoPane;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("ACT","onCreate");
setContentView(R.layout.themoviedb_main);
if(findViewById(R.id.detail_activity_container)!=null) {
//the detail_activity_container will be present only in large-screen
//Layouts (res/Layout-sw600dp. If this view is present, then the activity
//should be in two-pane mode
mTwoPane=true;
//In two-pane mode, show the detail view in this activity by adding
// or replacing the detail fragment using a fragment transaction
DetailActivityFragment detailActivityFragment=new DetailActivityFragment();
// Bundle bundle=new Bundle();
// bundle.putBoolean("twopane",mTwoPane);
// detailActivityFragment.setArguments(bundle);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.detail_activity_container, detailActivityFragment)
.commit();
}
} else {
mTwoPane=false;
}
}
#Override
protected void onStart() {
Log.d("ACT","onStart");
super.onStart();
}
#Override
protected void onResume() {
Log.d("ACT","onResume");
super.onResume();
}
#Override
protected void onPause() {
Log.d("ACT","onPause");
super.onPause();
}
#Override
protected void onStop() {
Log.d("ACT","onStop");
super.onStop();
}
#Override
protected void onRestart() {
Log.d("ACT","onRestart");
super.onRestart();
}
#Override
protected void onDestroy() {
Log.d("ACT","onDestroy");
super.onDestroy();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.movies_feed_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
startActivity(new Intent(this,SettingsActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
public static class MoviesFeedFragment extends Fragment implements AdapterView.OnItemClickListener {
private static final int APPROX_FIXED_IMAGE_WIDTH=170;
private GridView mGridView;
private MovieAdapter mMovieAdapter;
private ArrayList<Response.Movie> mListMovies=new ArrayList<Response.Movie>();
private TimeMeasure mTm;
private boolean mFromDetailsActivity =false;
private boolean mUserRotation=false;
private boolean mFavoritesMode=false;
#Override
public void onAttach(Activity activity) {
Log.d("FRAG", "onAttach");
super.onAttach(activity);
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("FRAG", "onCreate");
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.fragment_moviesfeed, container, false);
Log.d("FRAG", "onCreateView");
mGridView= (GridView) view.findViewById(R.id.gridView);
mGridView.setOnItemClickListener(this);
mMovieAdapter = new MovieAdapter(getActivity(), mListMovies);
mGridView.setAdapter(mMovieAdapter);
//for tablets specially
// float scalefactor = getResources().getDisplayMetrics().density * APPROX_FIXED_IMAGE_WIDTH;
// Point size=new Point();
// getWindowManager().getDefaultDisplay().getSize(size);
// int number=size.x;
// int columns = (int) ((float) number / (float) scalefactor);
//
// mGridView.setNumColumns(columns);
if(savedInstanceState!=null){
mUserRotation=true;
ArrayList<Response.Movie> tempList=new ArrayList<Response.Movie>();
tempList=savedInstanceState.getParcelableArrayList("mListMovies");
mListMovies.clear();
mListMovies.addAll(tempList);
mMovieAdapter = new MovieAdapter(getActivity(), mListMovies);
mGridView.setAdapter(mMovieAdapter);
}
return view;
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
Log.d("FRAG", "onActivity");
super.onActivityCreated(savedInstanceState);
}
#Override
public void onPause() {
Log.d("FRAG", "onPause");
super.onPause();
}
#Override
public void onStop() {
Log.d("FRAG", "onStop");
super.onStop();
}
#Override
public void onSaveInstanceState(Bundle outState) {
Log.d("FRAG", "onSaveInstanceState");
super.onSaveInstanceState(outState);
outState.putParcelableArrayList("mListMovies", mListMovies);
}
#Override
public void onResume() {
Log.d("FRAG", "onResume");
super.onResume();
if (mFromDetailsActivity !=true && mUserRotation!=true) {
executeCallToMoviesApi();
} else if(mFromDetailsActivity==true && mFavoritesMode==true) {
getFavoritesMovies();
}
mFromDetailsActivity =false;
mUserRotation=false;
}
#Override
public void onDestroyView() {
Log.d("FRAG", "onDestroyView");
super.onDestroyView();
}
#Override
public void onDestroy() {
Log.d("FRAG", "onDestroy");
super.onDestroy();
}
#Override
public void onDetach() {
Log.d("FRAG", "onDetach");
super.onDetach();
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (mTwoPane==true) {
DetailActivityFragment detailActivityFragment=new DetailActivityFragment();
Bundle args=new Bundle();
args.putString("movieId", String.valueOf(mListMovies.get(position).getId()));
//Response.Movie movie=new Response.Movie();
//movie.setId(mListMovies.get(position).getId());
//args.putParcelable("movie",movie);
args.putBoolean("favoritesMode",mFavoritesMode);
detailActivityFragment.setArguments(args);
getActivity().getSupportFragmentManager().beginTransaction()
.replace(R.id.detail_activity_container,detailActivityFragment)
.commit();
} else {
Intent intent = new Intent(getActivity(), DetailActivity.class);
intent.putExtra("favoritesMode", mFavoritesMode);
intent.putExtra("movieId", mListMovies.get(position).getId());
mFromDetailsActivity = true;
startActivity(intent);
}
}
public void executeCallToMoviesApi(){
SharedPreferences sharedPreferences= PreferenceManager.getDefaultSharedPreferences(getActivity());
String orderStr= sharedPreferences.getString(getString(R.string.pref_order_key),
getString(R.string.pref_order_default));
mFavoritesMode=false;
if (orderStr.equals(getString(R.string.pref_popularity))){
getActivity().setTitle(getString(R.string.mainactivity_title_popularity));
getMoviesByPopularity();
}
if (orderStr.equals(getString(R.string.pref_rate))){
getActivity().setTitle(getString(R.string.mainactivity_title_rate));
getMoviesByRate();
}
if (orderStr.equals(getString(R.string.pref_favorites))) {
getActivity().setTitle(getString(R.string.mainactivity_title_favorites));
mFavoritesMode=true;
getFavoritesMovies();
}
}
public void getMoviesByPopularity(){
ApiClient.MyApi myApi=ApiClient.getMyApiClient();
myApi.getMoviesByPopularityDesc(AppConstants.API_KEY, callbackResponse());
}
public void getMoviesByRate(){
ApiClient.MyApi myApi=ApiClient.getMyApiClient();
myApi.getMoviesByAverageRate(AppConstants.API_KEY, callbackResponse());
}
private Callback<Response> callbackResponse() {
return new Callback<Response>() {
#Override
public void success(Response response, retrofit.client.Response response2) {
// Message.displayToast(MoviesFeed.this, "success");
mListMovies.clear();
mListMovies.addAll((ArrayList) response.getResults());
mMovieAdapter = new MovieAdapter(getActivity(), mListMovies);
mGridView.setAdapter(mMovieAdapter);
}
#Override
public void failure(RetrofitError error) {
Log.v("VILLANUEVA", "error:" + error.getMessage().toString());
Message.displayToast(getActivity(), "failure" + error.getMessage().toString());
}
};
}
public void getFavoritesMovies(){
List<MovieDetail> tempListDetail;
ArrayList<Response.Movie> tempList=new ArrayList<Response.Movie>();
SharedPreferenceManager sharedPreferenceManager=new SharedPreferenceManager(getActivity());
tempListDetail = sharedPreferenceManager.getFavoritesList();
Response.Movie tempMovie;
if (tempListDetail!=null) {
for (MovieDetail movieDetail : tempListDetail) {
tempMovie = new Response.Movie();
tempMovie.setId(movieDetail.getId());
tempMovie.setPoster_path(movieDetail.getPoster_path());
tempList.add(tempMovie);
}
mListMovies.clear();
mListMovies.addAll(tempList);
}
mMovieAdapter = new MovieAdapter(getActivity(), mListMovies);
mGridView.setAdapter(mMovieAdapter);
}
}//MoviesFeedFragment
Screenshots, before and after rotation.
Before:
After:
Log