set text value from fragment.newInstance String

set text value from fragment.newInstance String - android

I am trying to set a string to a textview but everytime i click the button Quiz the activity is just refreshing instead going to fragment activity.
This summarize the situation.
I have dynamic viewPager inside activity called Quiz_Container
Use only one fragment(Module_Topics_Content_Quiz) in public Fragment getItem(int position) or FragmentStatePagerAdapter.
I want to change text of a textview in the fragment from activity everytime i swipe.
I am passing the string using newInstance with parameter from activity to fragment
The string came from quizQuestion.get(position)
I'm getting the right value with the Log.d but when setting it to textview the activity is just refreshing.
this is my code.
Quiz_Container.java
public class Quiz_Container extends AppCompatActivity implements Module_Topics_Content_Quiz.OnFragmentInteractionListener {
android.support.v7.app.ActionBar actionBar;
ViewPager quizPager;
private int topicID;
private int moduleID;
private int subModuleID;
private ArrayList<Integer> quizID;
private ArrayList<String> quizQuestion;
private ArrayList<String> choiceA;
private ArrayList<String> choiceB;
private ArrayList<String> choiceC;
private ArrayList<String> choiceD;
private ArrayList<String> quizAnswer;
private FragmentManager fragmentManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz__container);
actionBar = getSupportActionBar();
actionBar.setTitle("Quiz");
actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#f1ad1e")));
Bundle extras = getIntent().getExtras();
topicID = extras.getInt("topicID");
moduleID = extras.getInt("moduleID");
subModuleID = extras.getInt("subModuleID");
Log.d("quizTopicID", "" + topicID);
Log.d("quizModuleID", "" + moduleID);
Log.d("quizSubModuleID", "" + subModuleID);
new quizTask().execute();
}
#Override
public void onFragmentInteraction(Uri uri) {
}
public boolean isOnline() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting()) {
return true;
} else {
return false;
}
} // Check Internet Connection
class quizTask extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
}
#Override
protected String doInBackground(String... params) {
BufferedReader reader = null;
try {
URL quizURL = new URL("http://192.168.1.110/science/index.php/users/get_quiz_items/" + topicID + "/" + moduleID + "/" + subModuleID + "" );
HttpURLConnection con = (HttpURLConnection)quizURL.openConnection();
StringBuilder sb = new StringBuilder();
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String quizResponse;
while ((quizResponse = reader.readLine()) != null) {
return quizResponse;
}
return sb.toString();
} catch (IOException e) {
e.printStackTrace();
return null;
} finally {
if(reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
}
}
#Override
protected void onPostExecute(String quizResponses) {
Log.d("quizResponse", "" + quizResponses);
try {
JSONObject quizObject = new JSONObject(quizResponses);
boolean result = quizObject.getBoolean("success");
if (result) {
JSONArray quizArray = quizObject.getJSONArray("data");
quizID = new ArrayList<>();
quizQuestion = new ArrayList<>();
choiceA = new ArrayList<>();
choiceB = new ArrayList<>();
choiceC = new ArrayList<>();
choiceD = new ArrayList<>();
quizAnswer = new ArrayList<>();
for (int i = 0; i < quizArray.length(); i ++) {
JSONObject dataQuiz = quizArray.getJSONObject(i);
quizID.add(dataQuiz.getInt("id"));
quizQuestion.add(dataQuiz.getString("question"));
choiceA.add(dataQuiz.getString("a"));
choiceB.add(dataQuiz.getString("b"));
choiceC.add(dataQuiz.getString("c"));
choiceD.add(dataQuiz.getString("d"));
quizAnswer.add(dataQuiz.getString("answer"));
}
Log.d("quizSize", "" + quizID.size());
quizPager = (ViewPager) findViewById(R.id.quizPager);
fragmentManager = Quiz_Container.this.getSupportFragmentManager();
quizPager.setAdapter(new quizAdapter(getSupportFragmentManager()));
quizPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
}
else {
Toast.makeText(getApplication(), "no quiz yet", Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
} // end of quizTask
class quizAdapter extends FragmentStatePagerAdapter {
public quizAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Fragment fragment = null;
for (int i = 0; i < quizID.size; i++) {
if (i == position) {
fragment = Module_Topics_Content_Quiz.newInstance(quizQuestion.get(position));
Log.d("testQuestion", "" + quizQuestion.get(position)); // this code is working
}
}
return fragment;
}
#Override
public int getCount() {
return quizID.size();
}
}
}
Module_Topics_Content_Quiz.java
public class Module_Topics_Content_Quiz extends Fragment {
TextView textQuizQuestion;
private String qQuestion;
public Module_Topics_Content_Quiz() {
// Required empty public constructor
}
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
public void onFragmentInteraction(Uri uri);
}
public static Module_Topics_Content_Quiz newInstance(String question) {
Module_Topics_Content_Quiz fragment = new Module_Topics_Content_Quiz();
Bundle args = new Bundle();
args.putString("question", question);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
qQuestion = getArguments().getString("question");
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_module__topics__content__quiz, container, false);
textQuizQuestion = (TextView) getActivity().findViewById(R.id.textQuestion);
Log.d("question", "" + qQuestion); // this is working
// textQuizQuestion.setText(qQuestion); // error if enable
return rootView;
}
}
Please help. Thank you.

In your fragment, try inflating the TextView using the View returned rather than using getActivity()
You need to inflate the Fragment's view and call findViewById() on the View it returns.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_module__topics__content__quiz, container, false);
// inflate the View inside Fragment using the View returned
textQuizQuestion = (TextView) rootView.findViewById(R.id.textQuestion);
Log.d("question", "" + qQuestion); // this is working
textQuizQuestion.setText(qQuestion);
return rootView;
}
You can also use getView() from within the Fragment to get the root view.
If you wanna call from the enclosing Activity, use
getFragmentManager().findFragmentById(R.id.your_fragment_id).getView().findViewById(R.id.your_view);

Related

Problem with detail activity screen loading. It keeps on loading without stopping

I have a problem with my detail activity layout screen. The details in the screen are showing but the screen loading does not stop after that. I need help to stop my screen loading after the details in the screen has been shown.
The main layout activity loads for a certain amount of time and it works fine but the detail activity layout keeps on loading without stopping.
DetailsFragment.java
public class DetailsFragment extends Fragment {
private static final String LOG_TAG = DetailsFragment.class.getSimpleName();
private static final String ARG_NEWS = "arg_news";
private static final String SAVE_NEWS = "save_news";
private static final String SAVE_FAVORITE_NEWS = "save_favorite_news";
private static final String SAVE_FAVORITE_SORT = "save_favorite_sort";
private static final String SAVE_FULLY_LOADED = "save_fully_loaded";
private static final String SAVE_SHARE_MENU_VISIBILITY = "save_share_menu_visibility";
private final ResponseReceiver mReceiver = new ResponseReceiver();
private Context mContext;
private News mNews;
private ShareActionProvider mShareActionProvider;
private MenuItem mShareMenuItem;
private ImageView mPosterImageView;
private OnLoadingFragmentListener mLoadingListener;
private boolean mIsFavoriteNews;
private boolean mIsFavoriteSort;
private boolean mIsFullyLoaded;
private boolean mIsShareMenuItemVisible;
public DetailsFragment() {
// Required empty public constructor
}
// Create new Fragment instance
public static DetailsFragment newInstance(News newsSelected) {
DetailsFragment fragment = new DetailsFragment();
Bundle args = new Bundle();
args.putParcelable(ARG_NEWS, newsSelected);
fragment.setArguments(args);
return fragment;
}
public static DetailsFragment newInstance() {
DetailsFragment fragment = new DetailsFragment();
return fragment;
}
// Listener to handle star button clicks. This button adds and remove news from
// content provider
private final View.OnClickListener mStarButtonOnClickListener = new View.OnClickListener() {
public void onClick(View view) {
// Can't save it to favorites db if news poster is not ready yet
if (mPosterImageView != null && !Utils.hasImage(mPosterImageView)) {
Toast.makeText(mContext, R.string.please_wait_poster_download,
Toast.LENGTH_SHORT).show();
return;
}
if (mIsFavoriteNews) {
if (removeFavoriteNews(mNews) > 0) {
Toast.makeText(mContext, R.string.success_remove_favorites, Toast
.LENGTH_SHORT)
.show();
((ImageButton) view).setImageResource(R.drawable.ic_star_border);
// Delete poster image stored in internal storage
Utils.deleteFileFromInternalStorage(mContext, mNews.getTitle());
mIsFavoriteNews = false;
} else {
Toast.makeText(mContext, R.string.fail_remove_favorites,
Toast.LENGTH_SHORT).show();
}
} else {
if (addFavoriteNews(mNews) != null) {
Toast.makeText(mContext, R.string.success_add_favorites, Toast
.LENGTH_SHORT).show();
((ImageButton) view).setImageResource(R.drawable.ic_star);
// Save poster image to internal storage
Bitmap posterBitmap = Utils.getBitmapFromImageView(mPosterImageView);
Utils.saveBitmapToInternalStorage(mContext, posterBitmap, mNews.getTitle());
mIsFavoriteNews = true;
} else {
Toast.makeText(mContext, R.string.fail_add_favorites, Toast
.LENGTH_SHORT).show();
}
}
}
};
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnLoadingFragmentListener) {
mLoadingListener = (OnLoadingFragmentListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnLoadingInteractionListener");
}
mContext = context;
}
#Override
public void onDetach() {
super.onDetach();
mLoadingListener = null;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mNews = getArguments().getParcelable(ARG_NEWS);
mIsFavoriteNews = isFavoriteNews(mContext, mNews);
mIsFavoriteSort = Utils.isFavoriteSort(mContext);
}
setHasOptionsMenu(true);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.details_menu, menu);
}
#Override
public void onPrepareOptionsMenu(Menu menu) {
mShareMenuItem = menu.findItem(R.id.menu_item_share);
mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider
(mShareMenuItem);
setShareMenuItemAction();
super.onPrepareOptionsMenu(menu);
}
private void setShareMenuItemAction() {
if (mNews != null ) {
//String videoKey = mNews.getVideos()[0].getKey();
if (mShareActionProvider != null
&& mShareMenuItem != null) {
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("text/plain");
mShareActionProvider.setShareIntent(shareIntent);
mShareMenuItem.setVisible(true);
}
}
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putParcelable(SAVE_NEWS, mNews);
outState.putBoolean(SAVE_FAVORITE_NEWS, mIsFavoriteNews);
outState.putBoolean(SAVE_FAVORITE_SORT, mIsFavoriteSort);
outState.putBoolean(SAVE_FULLY_LOADED, mIsFullyLoaded);
outState.putBoolean(SAVE_SHARE_MENU_VISIBILITY, mIsShareMenuItemVisible);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (mNews == null) {
return null;
}
// Restore objects value
if (savedInstanceState != null) {
mNews = savedInstanceState.getParcelable(SAVE_NEWS);
mIsFavoriteNews = savedInstanceState.getBoolean(SAVE_FAVORITE_NEWS);
mIsFavoriteSort = savedInstanceState.getBoolean(SAVE_FAVORITE_SORT);
mIsFullyLoaded = savedInstanceState.getBoolean(SAVE_FULLY_LOADED);
mIsShareMenuItemVisible = savedInstanceState.getBoolean(SAVE_SHARE_MENU_VISIBILITY);
}
View view = inflater.inflate(R.layout.fragment_details, container, false);
mPosterImageView = (ImageView) view.findViewById(R.id.news_img);
Glide.with(mContext).load(mNews.getImageUri())
.dontAnimate().into(mPosterImageView);
TextView titleView = (TextView) view.findViewById(R.id.title_content);
titleView.setText(mNews.getTitle());
TextView publishDateView = (TextView) view.findViewById(R.id.publish_date_content);
String date = Utils.formatDateForLocale(mNews.getPublishedDate());
publishDateView.setText(date);
TextView author = (TextView) view.findViewById(R.id.author_name);
author.setText(mNews.getAuthor());
TextView descriptionView = (TextView) view.findViewById(R.id.description_content);
TextView fullNewsUrl = (TextView) view.findViewById(R.id.news_full);
fullNewsUrl.setText(mNews.getFullNewsUrl());
// In portuguese, some news does not contain overview data. In that case, displays
// default text: #string/overview_not_available
if (!TextUtils.isEmpty(mNews.getDescription())) {
descriptionView.setText(mNews.getDescription());
}
ImageButton starButton = (ImageButton) view.findViewById(R.id.star_button);
starButton.setOnClickListener(mStarButtonOnClickListener);
if (mIsFavoriteNews) {
starButton.setImageResource(R.drawable.ic_star);
} else {
starButton.setImageResource(R.drawable.ic_star_border);
}
starButton.setVisibility(View.VISIBLE);
FrameLayout detailFrame = (FrameLayout) view.findViewById(R.id.detail_frame);
detailFrame.setVisibility(View.VISIBLE);
return view;
}
// Method that adds a News to content provider
private Uri addFavoriteNews(News news) {
Uri newsReturnUri = null;
try {
ContentValues newsContentValues = createNewsValues(news);
newsReturnUri = mContext.getContentResolver().insert(FavoriteNewsContract
.NewsEntry
.CONTENT_URI, newsContentValues);
} catch (SQLException e) {
Log.d(LOG_TAG, "SQLException while adding news to Favorite db");
e.printStackTrace();
}
return newsReturnUri;
}
// Method that removes a News from content provider
private int removeFavoriteNews(News news) {
int newsRemoved = mContext.getContentResolver().delete(FavoriteNewsContract
.NewsEntry.CONTENT_URI,
FavoriteNewsContract
.NewsEntry._ID + " = ?", new String[]{news.getTitle()});
return newsRemoved;
}
// Create news content values
private ContentValues createNewsValues(News news) {
ContentValues newsContentValues = new ContentValues();
// newsContentValues.put(FavoriteNewsContract.NewsEntry._ID, Integer.parseInt(news
// .getId()));
newsContentValues.put(FavoriteNewsContract.NewsEntry.COLUMN_TITLE, news.getTitle());
newsContentValues.put(FavoriteNewsContract.NewsEntry.COLUMN_PUBLISH_DATE, news
.getPublishedDate());
newsContentValues.put(FavoriteNewsContract.NewsEntry.COLUMN_AUTHOR, news
.getAuthor());
newsContentValues.put(FavoriteNewsContract.NewsEntry.COLUMN_DESCRIPTION, news
.getDescription());
newsContentValues.put(FavoriteNewsContract.NewsEntry.COLUMN_FULL_NEWS_URL, news
.getFullNewsUrl());
newsContentValues.put(FavoriteNewsContract.NewsEntry.COLUMN_IMG_URL, news
.getImageUri()
.toString());
return newsContentValues;
}
// Method that query content provider and checks whether is a Favorite news or not
private boolean isFavoriteNews(Context ctx, News news) {
String newsID = news.getTitle();
Cursor cursor = ctx.getContentResolver().query(FavoriteNewsContract.NewsEntry
.CONTENT_URI, null,
FavoriteNewsContract.NewsEntry._ID + " = " + newsID, null, null);
if (cursor != null && cursor.moveToNext()) {
int newsIdColumnIndex = cursor.getColumnIndex(FavoriteNewsContract.NewsEntry._ID);
if (TextUtils.equals(newsID, cursor.getString(newsIdColumnIndex))) {
return true;
}
}
if (cursor != null) {
cursor.close();
}
return false;
}
#Override
public void onResume() {
super.onResume();
if (mNews != null) {
if (mReceiver != null) {
LocalBroadcastManager.getInstance(mContext)
.registerReceiver(mReceiver, new IntentFilter(Constants
.ACTION_EXTRA_INFO_RESULT));
}
if (!mIsFullyLoaded && !mIsFavoriteSort) {
Intent intent = new Intent(mContext, NewsIntentService.class);
intent.setAction(Constants.ACTION_EXTRA_INFO_REQUEST);
intent.putExtra(NewsIntentService.EXTRA_INFO_NEWS_ID, mNews.getTitle());
mContext.startService(intent);
if (mLoadingListener != null) {
mLoadingListener.onLoadingDisplay(true, true);
}
}
}
}
#Override
public void onPause() {
super.onPause();
if (mReceiver != null) {
LocalBroadcastManager.getInstance(mContext).unregisterReceiver(mReceiver);
}
}
// BroadcastReceiver for network call
public class ResponseReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if (intent == null || intent.getAction() == null) {
return;
}
if (intent.getAction().equals(Constants.ACTION_EXTRA_INFO_RESULT)) {
setShareMenuItemAction();
} else {
Toast.makeText(mContext, R.string.toast_failed_to_retrieve_data,
Toast.LENGTH_SHORT).show();
}
if (mLoadingListener != null) {
mLoadingListener.onLoadingDisplay(true, false);
}
mIsFullyLoaded = true;
}
}
}
DetailsActivity.java
public class DetailsActivity extends AppCompatActivity implements OnLoadingFragmentListener {
private static final String LOG_TAG = DetailsActivity.class.getSimpleName();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_details);
if (savedInstanceState == null) {
Intent intent = getIntent();
if (intent != null && intent.hasExtra(Constants.EXTRA_NEWS)) {
News news = intent
.getParcelableExtra(Constants.EXTRA_NEWS);
DetailsFragment detailsFragment = DetailsFragment.newInstance(news);
getSupportFragmentManager().beginTransaction()
.add(R.id.details_fragment_container, detailsFragment).commit();
} else {
Log.d(LOG_TAG, "Something went wrong. Intent doesn't have Constants.EXTRA_NEWS" +
" extra. Finishing DetailsActivity.");
finish();
}
}
}
#Override
public void onLoadingDisplay(boolean fromDetails, boolean display) {
Fragment loadingFragment = getSupportFragmentManager()
.findFragmentByTag(LoadingFragment.FRAGMENT_TAG);
if (display && loadingFragment == null) {
loadingFragment = LoadingFragment.newInstance();
if (fromDetails) {
getSupportFragmentManager().beginTransaction()
.add(R.id.details_fragment_container,
loadingFragment, LoadingFragment.FRAGMENT_TAG).commit();
} else {
getSupportFragmentManager().beginTransaction()
.add(R.id.news_fragment_container,
loadingFragment, LoadingFragment.FRAGMENT_TAG).commit();
}
} else if (!display && loadingFragment != null) {
getSupportFragmentManager().beginTransaction()
.remove(loadingFragment).commit();
}
}
}
LoadingFragment.xml
public class LoadingFragment extends Fragment {
public static final String FRAGMENT_TAG = LoadingFragment.class.getSimpleName();
private static final String LOG_TAG = LoadingFragment.class.getSimpleName();
public LoadingFragment() {
// Required empty public constructor
}
public static LoadingFragment newInstance() {
LoadingFragment fragment = new LoadingFragment();
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_loading, container, false);
return view;
}
}
fragment_loading.xml
<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"
android:background="#color/semiTransparentBlack"
android:clickable="true"
tools:context=".ui.LoadingFragment">
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center" />
</FrameLayout>

Most likely you need to change the loading View (ProgressBar?) visibility to INVISIBLE or GONE at the appropriate time, probably when loading is complete.
If the loading View is contained in some kind of dialog, then you would need to dismiss it at the appropriate time.

use onDestroy
#Override
public void onDestroy() {
super.onDestroy();
mLoadingListener = null;
}
and also you should remove ResponseReceiver
if (mLoadingListener != null) {
mLoadingListener.onLoadingDisplay(true, false);
}

Using searchview in actionbar in fragments

I am displaying a userlist and I am using serachview in my actionbar to search. When I am using the searchView in activity, it works fine but when I use it for fragment, searchview doesn't work. It does not search in the listview.
Below is my code.
UserListFragment.java
public class UsersListFragment extends Fragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
Activity activity;
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private static final String TAG = "UsersListFragment";
private OnFragmentInteractionListener mListener;
private ListView listView;
private List<UserData> users;
private CustomAdapter adapter;
SharedPreferences.Editor preferenceEditor;
Timer myTimer;
View view;
ActionBar actionBar;
private static final String PREFRENCES_NAME = "setPreferences";
private ProgressDialog progressBar;
String partnerKeyValue;
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* #param param1 Parameter 1.
* #param param2 Parameter 2.
* #return A new instance of fragment UsersListFragment.
*/
// TODO: Rename and change types and number of parameters
public static UsersListFragment newInstance(String param1, String param2) {
UsersListFragment fragment = new UsersListFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
progressBar = new ProgressDialog(getActivity());
progressBar.setCancelable(false);
progressBar.setMessage("Loading...");
progressBar.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressBar.setProgress(0);
Log.i(TAG, "UsersListFragment onCreate");
users = new ArrayList<>();
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
SharedPreferences preferenceSettings = getActivity().getSharedPreferences(PREFRENCES_NAME,Context.MODE_PRIVATE);
preferenceEditor = preferenceSettings.edit();
preferenceEditor.putString("refresh","userlistview");
preferenceEditor.commit();
FirebaseUtil uts = new FirebaseUtil(getContext());
uts.startListeningNotification(Global.getInstance().ownerId, new CallBack() {
#Override
public void onCallback(Map<String, Object> response, String Success) {
Log.i(TAG, Success);
setHasOptionsMenu(true);
String partnerKey = (String) response.get("key");
if (partnerKey != null) {
Map<String, Object> typeCheck = (Map<String, Object>) response.get("value");
String type = (String) typeCheck.get("type");
if (type.equals("chat")) {
String key1 = Global.getInstance().ownerId;
String key2 = partnerKey;
partnerKeyValue = partnerKey;
if (key2 != null) {
String currentPartner = Global.getInstance().partnerId;
if (currentPartner.length() > 0) {
if (currentPartner.equals(partnerKey)) {
} else {
Global.getInstance().unreadMessageUsers.add(partnerKey);
}
Global.getInstance().unreadMessageUsers.add(partnerKey);
} else {
}
}
}
}
}
});
}
#Override
public void onStart() {
super.onStart();
Log.i(TAG, "UsersListFragment onStart");
}
#Override
public void onResume() {
super.onResume();
Log.i(TAG, "UsersListFragment onResume");
}
#Override
public void onPause() {
super.onPause();
Log.i(TAG, "UsersListFragment onStart");
}
#Override
public void onStop() {
super.onStop();
Log.i(TAG, "UsersListFragment onStop");
}
#Override
public void onDestroyView() {
super.onDestroyView();
}
#Override
public void onDestroy() {
super.onDestroy();
FirebaseUtil util = new FirebaseUtil(getContext());
util.updateUserStatus(Global.getInstance().ownerId, "4");
Log.i(TAG, "UsersListFragment onDestroy");
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
if(actionBar!=null) {
actionBar.setDisplayUseLogoEnabled(true);
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(false);
actionBar.setLogo(R.drawable.ic_logo);
ColorDrawable colorDrawable = new ColorDrawable(Color.parseColor("#006EAD"));
actionBar.setBackgroundDrawable(colorDrawable);
}
Toast.makeText(getActivity(), String.valueOf( Global.getInstance().unreadMessageUsers.size()) , Toast.LENGTH_SHORT).show();
int vd = users.size();
view = inflater.inflate(R.layout.fragment_userslist, container, false);
listView = (ListView) view.findViewById(R.id.userdisplay);
adapter = new CustomAdapter(getActivity(),R.layout.program_list, users );
listView.setAdapter(adapter);
if (users.size()==0){
usersList();
}else {
adapter.notifyDataSetChanged();
}
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
UserData data = users.get(position);
Global.getInstance().someData = data.getId();
Global.getInstance().partnerId = data.getId();
int i = 0;
for (Iterator<String> iter = Global.getInstance().unreadMessageUsers.iterator(); iter.hasNext(); ) {
String element = iter.next();
if (element.equals(data.getId().toString())) {
iter.remove();
}
}
data.setUnreadMessageCount(0);
users.remove(position);
users.add(position, data);
Toast.makeText(getActivity().getApplicationContext(),String.valueOf(Global.getInstance().unreadMessageUsers.size()),Toast.LENGTH_LONG).show();
Fragment fragmentOne = new ChatFragment();
android.support.v4.app.FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
Bundle args = new Bundle();
args.putString(ChatFragment.DATA_RECEIVE, data.getName());
fragmentOne .setArguments(args);
ft.addToBackStack(null);
ft.replace(R.id.framecontainerMain, fragmentOne).commit();
}
});
// Inflate the layout for this fragment
return view;
}
public void usersList () {
SharedPreferences preferenceSettings = getActivity().getSharedPreferences(PREFRENCES_NAME,Context.MODE_PRIVATE);
preferenceEditor = preferenceSettings.edit();
//get the data from userlist api
final String URL = "url";
String token = preferenceSettings.getString("authToken","");
final String userId = preferenceSettings.getString("userId","");
HashMap<String, String> params = new HashMap<String, String>();
params.put("user_id",userId);
params.put("auth_token",token);
progressBar.show();
JsonObjectRequest myRequest = new JsonObjectRequest(Request.Method.POST, URL,new JSONObject(params),
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.i(TAG, "onResponse:" +response);
String success = null;
try {
success = response.getString("success");
} catch (JSONException e) {
e.printStackTrace();
}
if(success == "true") {
JSONArray Array = null;
try {
//get the users
} else {
users.add(data);
}
}
Log.i(TAG, "arraylist");
adapter.notifyDataSetChanged();
onlineUsers();
myTimer = new Timer();
myTimer.schedule(new TimerTask() {
#Override
public void run() {
TimerMethod();
}
}, 0, 5000);
progressBar.dismiss();
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject Obj;
} else {
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
progressBar.dismiss();
VolleyLog.e("Error: ", error.getMessage());
Log.i(TAG, "onErrorResponse:" +error.networkResponse);
}
});
ApplicationController.getInstance().addToRequestQueue(myRequest);
myRequest.setRetryPolicy(new DefaultRetryPolicy(
5000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}
public void sortingArray(){
if (users.size()>0) {
synchronized (this) {
if (Global.getInstance().unreadMessageUsers.size() > 0) {
System.out.println("\nExample 3 - Count all with Map");
Map<String, Integer> map = new HashMap<String, Integer>();
for (String temp : Global.getInstance().unreadMessageUsers) {
Integer count = map.get(temp);
map.put(temp, (count == null) ? 1 : count + 1);
}
System.out.println("\nSorted Map");
Map<String, Integer> unreadCount = new TreeMap<String, Integer>(map);
for (String key : unreadCount.keySet()) {
int count_unread = unreadCount.get(key);
int i = 0;
for (UserData obj : users) {
UserData user = obj;
if (user.getId().equals(key)) {
user.setUnreadMessageCount(count_unread);
users.remove(i);
users.add(i, user);
break;
}
i++;
}
}
}
synchronized (this) {
if (Global.getInstance().userStatus.size() > 0) {
try {
for (Object dict : Global.getInstance().userStatus) {
Map<String, Object> val = (Map<String, Object>) dict;
String key = val.keySet().iterator().next();
val.get(key).toString().trim();
int statusValue;
if (val.get(key).toString().equals("")) {
statusValue = 4;
} else {
statusValue = Integer.valueOf(val.get(key).toString());
}
int i = 0;
for (UserData obj : users) {
UserData user = obj;
if (user.getId().equals(key)) {
user.setOnlineStatus(statusValue);
users.remove(i);
users.add(i, user);
break;
}
i++;
}
}
}catch (ConcurrentModificationException e){
e.printStackTrace();
}
}
}
Log.i(TAG, users.get(0).getName());
if (users.size() > 0) {
Collections.sort(users, new Comparator<UserData>() {
#Override
public int compare(UserData o1, UserData o2) {
if (o1.getOnlineStatus() > o2.getOnlineStatus()) {
return 1;
} else if (o1.getOnlineStatus() < o2.getOnlineStatus()) {
return -1;
} else {
return 0;
}
}
});
}
if (users.size() > 0) {
Collections.sort(users, new Comparator<UserData>() {
#Override
public int compare(UserData o1, UserData o2) {
if (o1.getUnreadMessageCount() > o2.getUnreadMessageCount()) {
return -1;
} else if (o1.getUnreadMessageCount() < o2.getUnreadMessageCount()) {
return 1;
} else {
return 0;
}
}
});
Global.getInstance().userStatus.clear();
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getActivity().getApplicationContext(), "any mesage", Toast.LENGTH_LONG).show();
adapter.notifyDataSetChanged();
}
});
}
}
}
}
public void TimerMethod() {
synchronized(this) {
SharedPreferences preferenceSettings = getActivity().getSharedPreferences("setPreferences", Context.MODE_PRIVATE);
String checkView = preferenceSettings.getString("refresh", "");
if (checkView.equals("userlistview")) {
if (Global.getInstance().userStatus.size() > 0) {
sortingArray();
}
} else {
preferenceEditor = preferenceSettings.edit();
preferenceEditor.putString("refresh", "userlistview");
preferenceEditor.commit();
if (Global.getInstance().unreadMessageUsers.size() > 0){
sortingArray();
}
}
}
}
public void onlineUsers (){
String value;
for (UserData data : users) {
value = data.getId();
FirebaseUtil online = new FirebaseUtil(getContext());
online.onlineUsers(value, new CallBack() {
#Override
public void onCallback(Map<String, Object> response, String Success) {
if (response == null) {
} else {
Global.getInstance().userStatus.add(response);
}
}
});
}
}
#Override
public void onCreateOptionsMenu(Menu menu,MenuInflater inflater) {
inflater.inflate(R.menu.menu_userlist,menu);
MenuItem item = menu.findItem(R.id.menuSearch);
SearchView searchView = (SearchView)item.getActionView();
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
adapter.getFilter().filter(newText);
return false;
}
});
super.onCreateOptionsMenu(menu,inflater);
}
private void logoutUser(){
Intent I = new Intent(getActivity(), LoginActivity.class);
startActivity(I);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menuSearch :
return true;
case R.id.menuLogout :
logoutUser();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
String val = "'";
mListener.onFragmentInteraction(val);
}
}
public void initlizeval(Context context) {
mListener = (OnFragmentInteractionListener) context;
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
myTimer.cancel();
mListener = null;
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(String val);
}
}
menu_userlist.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item android:id="#+id/menuSearch"
android:title="#string/search"
android:icon="#drawable/ic_search"
app:actionViewClass="android.widget.SearchView"
app:showAsAction="always">
</item>
<item android:id="#+id/menuLogout"
android:title="#string/logout"
android:icon="#drawable/ic_logout"
android:tint="#android:color/white"
app:showAsAction="always">
</item>
</menu>
CustomAdapter.java
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
public class CustomAdapter extends ArrayAdapter<UserData> {
private Activity activity;
private List<UserData> messages;
public CustomAdapter(Activity context, int resource, List<UserData> objects) {
super(context, resource, objects);
this.activity = context;
this.messages = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
packagename.CustomAdapter.ViewHolder holder;
LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
int layoutResource = 0; // determined by view type
UserData data = getItem(position);
int viewType = getItemViewType(position);
layoutResource = R.layout.program_list;
if (convertView != null) {
holder = (com.your.package.CustomAdapter.ViewHolder) convertView.getTag();
} else {
convertView = inflater.inflate(layoutResource, parent, false);
holder = new com.your.package.CustomAdapter.ViewHolder(convertView);
convertView.setTag(holder);
}
//set message content
holder.msg.setText(data.getName());
holder.id = data.geId();
holder.roleMsg.setText(data.getRole());
return convertView;
}
#Override
public int getViewTypeCount() {
// return the total number of view types. this value should never change
// at runtime
return 2;
}
#Override
public int getItemViewType(int position) {
// return a value between 0 and (getViewTypeCount - 1)
return position % 2;
}
private class ViewHolder {
private TextView msg;
private String id;
private TextView roleMsg;
public ViewHolder(View v) {
msg = (TextView) v.findViewById(R.id.textView1);
roleMsg = (TextView) v.findViewById(R.id.textView2);
}
}
}
HomeActivity.java
public class HomeActivity extends AppCompatActivity implements UsersListFragment.OnFragmentInteractionListener {
private UsersListFragment mItemsFragment;
private ChatFragment mFragmentOne;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
VideoFragment fragmentTwo ;
LinearLayout layout1 = (LinearLayout) findViewById(R.id.framecontainer);
layout1.setVisibility(View.VISIBLE);
LinearLayout layout2 = (LinearLayout) findViewById(R.id.framecontainerTab);
layout2.setVisibility(View.VISIBLE);
mItemsFragment = new UsersListFragment();
mItemsFragment.initlizeval(this);
android.support.v4.app.FragmentTransaction fts = getSupportFragmentManager().beginTransaction();
fts.add(R.id.framecontainer, mItemsFragment).commit();
//Instantiate some stuff here like view components
Fragment fragmentOne = new ChatFragment();
android.support.v4.app.FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.framecontainerTab, fragmentOne).commit();
}else{
LinearLayout layout1 = (LinearLayout) findViewById(R.id.framecontainer);
layout1.setVisibility(View.GONE);
LinearLayout layout2 = (LinearLayout) findViewById(R.id.framecontainerTab);
layout2.setVisibility(View.GONE);
layout2.removeAllViews();
mItemsFragment = new UsersListFragment();
mItemsFragment.initlizeval(this);
setFragment(mItemsFragment);
}
}
public void setFragment(Fragment frag)
{
android.support.v4.app.FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
}
public void attemptLogin1() {
String test = "one";
String tested = "fail";
}
#Override
public void onFragmentInteraction(String uri) {
LinearLayout layout1 = (LinearLayout) findViewById(R.id.framecontainer);
layout1.setVisibility(View.GONE);
LinearLayout layout2 = (LinearLayout)findViewById(R.id.framecontainerTab);
layout2.setVisibility(View.GONE);
findViewById(R.id.framecontainerVideo);
Toast.makeText(getApplicationContext(), "bullet", Toast.LENGTH_SHORT).show();
}
#Override
protected void onPause() {
super.onPause();
}
#Override
protected void onResume() {
super.onResume();
}
#Override
public void onBackPressed() {
super.onBackPressed();
Fragment fragmentOne = new ChatFragment();
LinearLayout layout1 = (LinearLayout) findViewById(R.id.framecontainer);
layout1.setVisibility(View.VISIBLE);
LinearLayout layout2 = (LinearLayout) findViewById(R.id.framecontainerTab);
layout2.setVisibility(View.VISIBLE);
}
#Override
protected void onStart() {
super.onStart();
getDelegate().onStart();
}
}
I have written setHasOptionsMenu(true); in onCreate of UserFragment.java
The logout functionality works fine but the search isn't working.
I have tried various options given on Stackoverflow as well as from other resource, but nothing worked. :(
Any help is appreciated.
Thanks in advance.

Create Constructor in your fragment. Pass Context object inside fragment constructor.which allows your activity as global access.

Remove this line and it will work
case R.id.menuSearch:
return true;

Can't update RecyclerView from my model Class?

I am working on a RecyclerView which must be Draggable & swipeable. Everything works perfect.
The Data is getting Fetched in one class called ExerciseDataProvider & the RV code is another Fragment RecyclerListViewFragment.
The problem is that i can't notify Data changed from the FetchExercise on postExecute method. So the Data's are not getting populated in the RV.
Please Guide me in a Right Direction.
ACTIVITY
public class DraggableSwipeableExampleActivity extends AppCompatActivity {
private static final String FRAGMENT_TAG_DATA_PROVIDER = "data provider";
private static final String FRAGMENT_LIST_VIEW = "list view";
private static final String FRAGMENT_TAG_ITEM_PINNED_DIALOG = "item pinned dialog";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_demo);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(new ExampleDataProviderFragment(), FRAGMENT_TAG_DATA_PROVIDER)
.commit();
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new RecyclerListViewFragment(), FRAGMENT_LIST_VIEW)
.commit();
}
}
public AbstractDataProvider getDataProvider() {
final Fragment fragment = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG_DATA_PROVIDER);
return ((ExampleDataProviderFragment) fragment).getDataProvider();
}
DATA PROVIDER
public class ExerciseDataProvider extends AbstractDataProvider {
private List<ConcreteData> mData;
private ConcreteData mLastRemovedData;
private int mLastRemovedPosition = -1;
public ExerciseDataProvider() {
new FetchExercise().execute();
mData = new LinkedList<>();
}
class FetchExercise extends AsyncTask<Void,Void,Void> {
#Override
protected Void doInBackground(Void... params) {
final int viewType = 0;
final int swipeReaction = RecyclerViewSwipeManager.REACTION_CAN_SWIPE_UP | RecyclerViewSwipeManager.REACTION_CAN_SWIPE_DOWN;
String url = "https://gist.githubusercontent.com/fake/cb9aa5494e7ee36ac3ca/raw/a4abfd19368063/exercise.JSON";
Log.d("Path", url);
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(url).build();
Response response = client.newCall(request).execute();
String jsonData = response.body().string();
try {
JSONArray jsonArray = new JSONArray(jsonData);
for (int i = 0; i < jsonArray.length(); i++) {
final long id = i;
JSONObject jsonObject = jsonArray.getJSONObject(i);
String exercise_name = jsonObject.getString("name");
int exercise_duration = jsonObject.getInt("duration");
mData.add(new ConcreteData(id, viewType, exercise_name, exercise_duration, swipeReaction));
Log.d("exercise_name", exercise_name);
}
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
}
}
#Override
public int getCount() {
return mData.size();
}
#Override
public Data getItem(int index) {
if (index < 0 || index >= getCount()) {
throw new IndexOutOfBoundsException("index = " + index);
}
return mData.get(index);
}
#Override
public int undoLastRemoval() {
if (mLastRemovedData != null) {
int insertedPosition;
if (mLastRemovedPosition >= 0 && mLastRemovedPosition < mData.size()) {
insertedPosition = mLastRemovedPosition;
} else {
insertedPosition = mData.size();
}
mData.add(insertedPosition, mLastRemovedData);
mLastRemovedData = null;
mLastRemovedPosition = -1;
return insertedPosition;
} else {
return -1;
}
}
#Override
public void moveItem(int fromPosition, int toPosition) {
if (fromPosition == toPosition) {
return;
}
final ConcreteData item = mData.remove(fromPosition);
mData.add(toPosition, item);
mLastRemovedPosition = -1;
}
#Override
public void removeItem(int position) {
//noinspection UnnecessaryLocalVariable
final ConcreteData removedItem = mData.remove(position);
mLastRemovedData = removedItem;
mLastRemovedPosition = position;
}
public static final class ConcreteData extends Data {
private final long mId;
private final String mText;
private final int mViewType;
private final int mDuration;
private boolean mPinned;
ConcreteData(long id, int viewType, String text, int duration, int swipeReaction) {
mId = id;
mViewType = viewType;
mText = text;
mDuration = duration;
}
#Override
public int getViewType() {
return mViewType;
}
#Override
public int getDuration() {
return mDuration;
}
#Override
public long getId() {
return mId;
}
#Override
public String toString() {
return mText;
}
#Override
public String getText() {
return mText;
}
#Override
public boolean isPinned() {
return mPinned;
}
#Override
public void setPinned(boolean pinned) {
mPinned = pinned;
}
}
}
RecyclerListViewFragment
public class RecyclerListViewFragment extends Fragment {
private RecyclerView mRecyclerView;
private RecyclerView.LayoutManager mLayoutManager;
private RecyclerView.Adapter mAdapter;
private RecyclerView.Adapter mWrappedAdapter;
private RecyclerViewDragDropManager mRecyclerViewDragDropManager;
private RecyclerViewSwipeManager mRecyclerViewSwipeManager;
private RecyclerViewTouchActionGuardManager mRecyclerViewTouchActionGuardManager;
public RecyclerListViewFragment() {
super();
}
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_recycler_list_view, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//noinspection ConstantConditions
mRecyclerView = (RecyclerView) getView().findViewById(R.id.recycler_view);
mLayoutManager = new LinearLayoutManager(getContext());
// touch guard manager (this class is required to suppress scrolling while swipe-dismiss animation is running)
mRecyclerViewTouchActionGuardManager = new RecyclerViewTouchActionGuardManager();
mRecyclerViewTouchActionGuardManager.setInterceptVerticalScrollingWhileAnimationRunning(true);
mRecyclerViewTouchActionGuardManager.setEnabled(true);
// drag & drop manager
mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
(NinePatchDrawable) ContextCompat.getDrawable(getContext(), R.drawable.material_shadow_z3));
// swipe manager
mRecyclerViewSwipeManager = new RecyclerViewSwipeManager();
//adapter
final MyDraggableSwipeableItemAdapter myItemAdapter = new MyDraggableSwipeableItemAdapter(getDataProvider());
myItemAdapter.setEventListener(new MyDraggableSwipeableItemAdapter.EventListener() {
#Override
public void onItemRemoved(int position) {
((DraggableSwipeableExampleActivity) getActivity()).onItemRemoved(position);
}
#Override
public void onItemViewClicked(View v, boolean pinned) {
onItemViewClick(v, pinned);
}
});
mAdapter = myItemAdapter;
mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(myItemAdapter); // wrap for dragging
mWrappedAdapter = mRecyclerViewSwipeManager.createWrappedAdapter(mWrappedAdapter); // wrap for swiping
final GeneralItemAnimator animator = new SwipeDismissItemAnimator();
animator.setSupportsChangeAnimations(false);
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mWrappedAdapter); // requires *wrapped* adapter
mRecyclerView.setItemAnimator(animator);
// additional decorations
//noinspection StatementWithEmptyBody
if (supportsViewElevation()) {
// Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
} else {
mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) ContextCompat.getDrawable(getContext(), R.drawable.material_shadow_z1)));
}
mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(ContextCompat.getDrawable(getContext(), R.drawable.list_divider_h), true));
mRecyclerViewTouchActionGuardManager.attachRecyclerView(mRecyclerView);
mRecyclerViewSwipeManager.attachRecyclerView(mRecyclerView);
mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);
}
#Override
public void onPause() {
mRecyclerViewDragDropManager.cancelDrag();
super.onPause();
}
#Override
public void onDestroyView() {
if (mRecyclerViewDragDropManager != null) {
mRecyclerViewDragDropManager.release();
mRecyclerViewDragDropManager = null;
}
if (mRecyclerViewSwipeManager != null) {
mRecyclerViewSwipeManager.release();
mRecyclerViewSwipeManager = null;
}
if (mRecyclerViewTouchActionGuardManager != null) {
mRecyclerViewTouchActionGuardManager.release();
mRecyclerViewTouchActionGuardManager = null;
}
if (mRecyclerView != null) {
mRecyclerView.setItemAnimator(null);
mRecyclerView.setAdapter(null);
mRecyclerView = null;
}
if (mWrappedAdapter != null) {
WrapperAdapterUtils.releaseAll(mWrappedAdapter);
mWrappedAdapter = null;
}
mAdapter = null;
mLayoutManager = null;
super.onDestroyView();
}
private void onItemViewClick(View v, boolean pinned) {
int position = mRecyclerView.getChildAdapterPosition(v);
if (position != RecyclerView.NO_POSITION) {
((DraggableSwipeableExampleActivity) getActivity()).onItemClicked(position);
}
}
public AbstractDataProvider getDataProvider() {
return ((DraggableSwipeableExampleActivity) getActivity()).getDataProvider();
}
public void notifyItemChanged(int position) {
mAdapter.notifyItemChanged(position);
}
public void notifyItemInserted(int position) {
mAdapter.notifyItemInserted(position);
mRecyclerView.scrollToPosition(position);
}
}

To update recyclerView from onPostExecute in a data provider class, your onPostExecute should have access to context where your recyclerView is defined.
Since your FetchExercise async task is defined inside ExerciseDataProvider class, try passing activity context to ExerciseDataProvider's constructor and then pass it on to FetchExercise async task as described here: getting context in AsyncTask
public class MyCustomTask extends AsyncTask<Void, Void, Long> {
private Context mContext;
public MyCustomTask (Context context){
mContext = context;
}
protected void onPostExecute(Long result) {
//use mContext to update recycler view
}
}
}
Use the context to update the recyclerView.
UPDATE
Step 1
Define an interface that will notify your activity of data set change inside a class that initialises your data provider class and pass activity context to constructor of data provider class.
public class ExampleDataProviderFragment extends Fragment {
private AbstractDataProvider mDataProvider;
//Define an interface that will notify your activity of data set change
public interface EventListener {
void onNotifyDataSetChanged();
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
//Pass activity context to ExerciseDataProvider
mDataProvider = new ExerciseDataProvider(getActivity());
}
public AbstractDataProvider getDataProvider() {
return mDataProvider;
}
}
Step 2
Add context parameter to ExerciseDataProvider's constructor and use it to notify activity that implements your interface to notify dataset change.
public class ExerciseDataProvider extends AbstractDataProvider {
private List<ConcreteData> mData;
private ConcreteData mLastRemovedData;
private int mLastRemovedPosition = -1;
//Add context parameter to constructor
public ExerciseDataProvider(Context context) {
//Pass context to async task
new FetchExercise(context).execute();
mData = new LinkedList<>();
}
class FetchExercise extends AsyncTask<Void,Void,Integer> {
Context mContext;
public FetchExercise(Context context) {
mContext = context;
}
#Override
protected Integer doInBackground(Void... params) {
...
return 1;
}
#Override
protected void onPostExecute(Integer result) {
super.onPostExecute(result);
//Typecast context to interface defined above
//and notify dataset changes by calling its method
ExampleDataProviderFragment.EventListener eventListener = (ExampleDataProviderFragment.EventListener)mContext;
eventListener.onNotifyDataSetChanged();
}
}
}
Step 3
Implement above defined interface in your activity class and notify recyclerview adapter inside it
public class DraggableSwipeableExampleActivity extends AppCompatActivity
implements ExampleDataProviderFragment.EventListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
...
}
//implement interface method and notify recyclerview of changes
#Override
public void onNotifyDataSetChanged() {
Fragment fragment = getSupportFragmentManager().findFragmentByTag(FRAGMENT_LIST_VIEW);
// you might need to change visibility of `mWrappedAdapter` in the fragment that defines it or create a getter for it so that you can access it here
((RecyclerListViewFragment) fragment).mWrappedAdapter.notifyDataSetChanged();
}
...
}

I think #random is correct you should be notifying your Recycle view on post execute.
#Override
protected void onPostExecute(Void aVoid) {
mRecyclerViewAdapter.notifyDataSetChanged();
super.onPostExecute(aVoid);
}
or if you have done something in your async task to add/delete something in the data set you would do:
#Override
protected void onPostExecute(Void aVoid) {
mRecyclerViewAdapter.notifyItemRemoved(itemposition); // or item added
mRecyclerViewAdapter.notifyDataSetChanged();
super.onPostExecute(aVoid);
}
Hope it helps !

RecyclerView save elements in JSON

I have recyclerview (in fragment) and fragment with details information to one of the element. All is good, but when my data was saved. I have bad results in my JSON file. All times when i open element of list he add new element inside JSON file, while he must overwrite oneself.
My Activity
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.start_page_activity);
Log.i("MainActivity", "onCreate");
if(savedInstanceState==null) {
getFragment(new ObjectListFragment());
}
}
public void getFragment(Fragment fragment) {
FragmentManager fm = getSupportFragmentManager();
Fragment mFragment = fm.findFragmentById(R.id.fragment_container);
if (mFragment == null) {
mFragment = fragment;
fm.beginTransaction()
.add(R.id.fragment_container, mFragment)
.commit();
}
if (mFragment != null) {
mFragment = fragment;
fm.beginTransaction().addToBackStack(null)
.replace(R.id.fragment_container, mFragment)
.commit();
}
}
}
My Model:
public class Object {
private static final String JSON_ID = "id";
private static final String JSON_TITLE = "title";
private UUID mId;
private String mTitle;
public Object() {
mId=UUID.randomUUID();
}
public Object(JSONObject json) throws JSONException {
mId = UUID.fromString(json.getString(JSON_ID));
mTitle = json.getString(JSON_TITLE);
}
public JSONObject toJSON()throws JSONException{
JSONObject json = new JSONObject();
json.put(JSON_ID, mId.toString());
json.put(JSON_TITLE, mTitle);
return json;
}
public UUID getId() {
return mId;
}
public String getTitle() {
return mTitle;
}
public void setTitle(String title) {
mTitle = title;
}
#Override
public String toString() {
return mTitle;
}
}
ObjectLab:
public class ObjectLab {
private static final String TAG = "ObjectLab";
private static final String FILENAME = "reminder.json";
private ObjectJSON mSerializer;
private ArrayList<Object> mObjects;
private static ObjectLab sObjectLab;
private Context mContext;
private ObjectLab(Context context){
mContext = context;
mSerializer = new ObjectJSON(mContext, FILENAME);
try {
mObjects = mSerializer.loadReminders();
} catch (Exception e) {
mObjects = new ArrayList<Object>();
Log.e(TAG, "Error loading crimes: ", e);
}
}
public static ObjectLab get(Context c){
if(sObjectLab == null){
sObjectLab = new ObjectLab(c.getApplicationContext());
}
return sObjectLab;
}
public ArrayList<Object> getObjects(){
return mObjects;
}
public Object getReminder(UUID id){
for(Object c : mObjects){
if(c.getId().equals(id))
return c;
}
return null;
}
public void addReminder(Object c){
mObjects.add(0,c);
}
public void deleteReminder(Object c){
mObjects.remove(c);
}
public boolean saveReminders(){
try{
mSerializer.saveReminders(mObjects);
Log.d(TAG, "reminders saved to file");
return true;
}catch (Exception e){
Log.e(TAG, "Error saving crimes: ", e);
return false;
}
}
ObjectJSON:
public class ObjectJSON {
private Context mContext;
private String mFilename;
public ObjectJSON(Context context, String filename) {
mContext = context;
mFilename = filename;
}
public void saveReminders(ArrayList<Object> objects) throws JSONException, IOException {
Log.i("Save","saveReminders");
JSONArray array = new JSONArray();
for (Object f : objects)
array.put(f.toJSON());
Writer writer = null;
try {
OutputStream out = mContext.openFileOutput(mFilename, Context.MODE_APPEND);
writer = new OutputStreamWriter(out);
writer.write(array.toString());
} finally {
if (writer != null)
writer.close();
}
}
public ArrayList<Object> loadReminders() throws IOException, JSONException {
Log.i("Save","loadReminders");
ArrayList<Object> objects = new ArrayList<Object>();
BufferedReader reader = null;
try {
InputStream in = mContext.openFileInput(mFilename);
reader = new BufferedReader(new InputStreamReader(in));
StringBuilder jsonString = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
jsonString.append(line);
}
JSONArray array = (JSONArray) new JSONTokener(jsonString.toString())
.nextValue();
for (int i = 0; i < array.length(); i++) {
objects.add(new Object(array.getJSONObject(i)));
}
} catch (FileNotFoundException e) {
//when 0
} finally {
if (reader != null)
reader.close();
}
return objects;
}
ObjectListFragment:
public class ObjectListFragment extends Fragment {
private RecyclerView mRecyclerView;
private RecyclerView.LayoutManager mLayoutManager;
private RecyclerAdapter mAdapter;
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.reminder_activity, container, false);
Log.i("ObjectListFragment", "onCreateView");
final ArrayList<Object> mData = ObjectLab.get(getActivity()).getObjects();
getActivity().setTitle("Object");
mRecyclerView = (RecyclerView)v. findViewById(R.id.my_recycler_view);
//registerForContextMenu(mRecyclerView);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
mAdapter = new RecyclerAdapter(mData);
mRecyclerView.setAdapter(mAdapter);
mRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener(v.getContext(), new RecyclerItemClickListener.OnItemClickListener() {
#Override
public void onItemClick(View view, int position) {
Log.i("ObjectListFragment", "onItemClick");
Object f = mData.get(position);
FragmentManager fm = getFragmentManager();
Fragment mFragment = fm.findFragmentById(R.id.fragment_container);
Bundle bundle = new Bundle();
bundle.putSerializable(ObjectFragment.EXTRA_REMINDER_ID, f.getId());
if (mFragment != null) {
mFragment = new ObjectFragment();
mFragment.setArguments(bundle);
fm.beginTransaction().addToBackStack(null)
.replace(R.id.fragment_container, mFragment)
.commit();
}
}
}));
return v;
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.menu_main, menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
Log.d("Testing", "ID == " + id);
switch (id) {
case R.id.action_settings: {
Log.d("onOptionsItemSelected", " SETTings");
Object f = new Object();
ObjectLab.get(getActivity()).addReminder(f);
FragmentManager fm = getFragmentManager();
Fragment mFragment = fm.findFragmentById(R.id.fragment_container);
Bundle bundle = new Bundle();
bundle.putSerializable(ObjectFragment.EXTRA_REMINDER_ID, f.getId());
if (mFragment != null) {
mFragment = new ObjectFragment();
mFragment.setArguments(bundle);
fm.beginTransaction().addToBackStack(null)
.replace(R.id.fragment_container, mFragment)
.commit();
}
return true;
}
}
return super.onOptionsItemSelected(item);
}
}
RecyclerAdapter:
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {
ArrayList<Object> mData;
public RecyclerAdapter(ArrayList<Object> objects) {
mData = objects;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.reminder_item, parent, false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.mTitleTextView.setText(mData.get(position).getTitle());
}
#Override
public int getItemCount() {
return mData.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
private TextView mTitleTextView;
public ViewHolder(View itemView) {
super(itemView);
mTitleTextView = (TextView) itemView.findViewById(R.id.forget_list_titleTextView);
}
}
RecyclerItemClickListener:
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
public interface OnItemClickListener {
public void onItemClick(View view, int position);
}
GestureDetector mGestureDetector;
public RecyclerItemClickListener(Context context, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildLayoutPosition(childView));
return true;
}
return false;
}
#Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
and last ObjectFragmet
public class ObjectFragment extends Fragment{
public static final String EXTRA_REMINDER_ID = "id";
private Object mObject;
public static ObjectFragment newInstance(UUID crimeId) {
Log.i("ObjectFragment", "newInstance");
Bundle args = new Bundle();
args.putSerializable(EXTRA_REMINDER_ID, crimeId);
ObjectFragment fragment = new ObjectFragment();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
UUID uuid = (UUID) getArguments().getSerializable(EXTRA_REMINDER_ID);
Log.i("ObjectFragment", " "+uuid);
mObject = ObjectLab.get(getContext()).getReminder(uuid);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.remind_act, container, false);
EditText editText = (EditText)v.findViewById(R.id.editText1);
editText.setText(mObject.getTitle());
editText.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
#Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
mObject.setTitle(charSequence.toString());
}
#Override
public void afterTextChanged(Editable editable) {
}
});
return v;
}
#Override
public void onPause() {
super.onPause();
Log.i("ObjectFragment", "onPause");
ObjectLab.get(getActivity()).saveReminders();
}
Links to the project(Android Studio).
Where my problem is that I do not. With pleasure hear all your comments and advice on the topic as well as that off-topic.
Your help will not forsake unattended.

When opening the OutputStream for writing into the file, you're using the Context.MODE_APPEND flag, which is causing the write operation to append and not overwrite as you intended, change it to:
OutputStream out = mContext.openFileOutput(mFilename, 0);
Also, there was no need to mention the RecyclerView at all, since it has nothing to do with the problem at hand.

Android getActivity().setTitle() gets String field from wrong object in ArrayList

I wish to set the titlebar in this fragment's activity to the HelpItem's description field.
On line 10, I set the title of the activity with a String representing a HelpItem's description.
Instead of getting the description of the retrieved HelpItem on line 9 I get the description of the next HelpItem.
I.E. in an ArrayList of five HelpItem objects with the helpDescriptions "aaa", "bbb", "ccc", "ddd", "eee" clicking on "bbb" in the
list displays "bbb" and the information text associated with it. The title is set to "ccc".
On line 19 the same call to helpItem.getHelpDescription() returns the description field of the "bbb" object.
When moving through the list via a ViewPager the next object in the list has the same issue until I reach the end of the list,
where the correct helpDescription field is displayed. I can also move back to the start of the list and it will display the correct
helpDescription, but this is then lost when I move forward and backward through the list again.
Any ideas why this is happening? Thanks.
public class HelpFragment extends Fragment {
private HelpItem helpItem;
private TextView mHelpDetails;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
UUID helpItemId = (UUID) getArguments().getSerializable(EXTRA_HELP_ITEM_ID);
helpItem = HelpList.get(getActivity()).getHelpItem(helpItemId);
getActivity().setTitle(helpItem.getHelpDescription());
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
View userView = inflater.inflate(R.layout.fragment_help_item, parent, false);
mHelpDetails = (TextView) userView.findViewById(R.id.help_details);
String displayInfo = "";
if ((helpItem.getHelpDescription() != null) &&
(helpItem.getHelpInformation() != null)) {
displayInfo = helpItem.getHelpDescription() + "\n\n\n" +
helpItem.getHelpInformation();
mHelpDetails.setText(displayInfo);
Log.d(TAG, "3 " + helpItem.getHelpDescription() + " "
+ helpItem.getHelpInformation());
}
return userView;
}
}
..
public class HelpItem {
private UUID mId;
private String helpDescription;
private String helpInformation;
public HelpItem(String hDesc, String hInfo) {
mId = UUID.randomUUID();
helpDescription = hDesc;
helpInformation = hInfo;
}
public UUID getId() {
return mId;
}
public void setId(UUID id) {
mId = id;
}
#Override
public String toString() {
return helpDescription;
}
public String getHelpDescription() {
return helpDescription;
}
public void setHelpDescription(String hDescription) {
this.helpDescription = hDescription;
}
public String getHelpInformation() {
return helpInformation;
}
public void setHelpInformation(String hInformation) {
this.helpInformation = hInformation;
}
}
..
public class HelpListItemPagerActivity extends FragmentActivity {
private ViewPager mViewPager;
private ArrayList<HelpItem> mHelpList;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.viewPager);
setContentView(mViewPager);
mHelpList = HelpList.get(this).getHelpList();
FragmentManager fragManager = getSupportFragmentManager();
mViewPager.setAdapter(new FragmentStatePagerAdapter(fragManager) {
#Override
public int getCount() {
return mHelpList.size();
}
#Override
public Fragment getItem(int position) {
HelpItem hItem = mHelpList.get(position);
return HelpFragment.newInstance(hItem.getId());
}
});
UUID helpItemId = (UUID)getIntent().getSerializableExtra(HelpFragment.EXTRA_HELP_ITEM_ID);
for (int i = 0; i < mHelpList.size(); i++) {
if (mHelpList.get(i).getId().equals(helpItemId)) {
mViewPager.setCurrentItem(i);
break;
}
}
}
}

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

set text value from fragment.newInstance String - android

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