Basically i followed the accepted answer of this with few changes in my Activity and it worked perfect. My problem is that I wrote the exact same codes for my Fragment. when I open my app, it doesn't show anything. Before I changed my code in my fragment from a custom Adapter to the FirebaseRecyclerAdapter, everything worked fine.
This is my Fragment class
public class HomeFragment extends BaseFragment {
public Button buttonsrch, openFreezer, openRef, openPantry, scrollToFreezer, scrollToRef, scrollToPantry;
public NestedScrollView scrollView;
public RelativeLayout mFreezerLayout,mRefrigeratorLayout, mPantryLayout;
public FloatingActionButton mAddItems;
public DatabaseReference mDatabaseFreezer;
public RecyclerView mFreezerRecyclerView;
public ArrayList<Event> mDataSet;
private FirebaseRecyclerAdapter<Event, ProductHolder> firebaseRecyclerAdapter;
#Override
public int getLayoutResId() {
return R.layout.fragment_home;
}
#Override
public View inOnCreateView(View root, #Nullable ViewGroup container, Bundle savedInstancesState) {
View view = mRoot;
buttonsrch = view.findViewById(R.id.searchButton);
openPantry = view.findViewById(R.id.ShowMorePantry);
openRef = view.findViewById(R.id.ShowMoreRefrigerator);
openFreezer = view.findViewById(R.id.ShowMoreFreezer);
scrollToFreezer = view.findViewById(R.id.bringToFreezer);
scrollToPantry = view.findViewById(R.id.bringToPantry);
scrollToRef = view.findViewById(R.id.bringToRefrigerator);
scrollView = view.findViewById(R.id.scrollViewHomeFragment);
mFreezerLayout = view.findViewById(R.id.FreezerLayout);
mPantryLayout =view.findViewById(R.id.PantryRelativeLayout);
mRefrigeratorLayout = view.findViewById(R.id.RefrigeratorRelativeLayout);
mAddItems = view.findViewById(R.id.addItems_Inventory);
mAddItems.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(getActivity(), AddInventoryActivity.class));
}
});
buttonsrch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i = new Intent(getActivity(), Search_Activity.class);
getActivity().startActivity(i);
}
});
openPantry.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent h = new Intent(getActivity(), PantryActivity.class);
getActivity().startActivity(h);
}
});
openRef.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent g = new Intent(getActivity(), RefActivity.class);
getActivity().startActivity(g);
}
});
openFreezer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent s = new Intent(getActivity(), FreezerActivity.class);
getActivity().startActivity(s);
}
});
scrollToFreezer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
FocusToFreezer();
}
});
scrollToRef.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
FocusToRef();
}
});
scrollToPantry.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
FocusToPantry();
}
});
mDataSet = new ArrayList<>();
mFreezerRecyclerView = view.findViewById(R.id.FreezerRecyclerView);
mFreezerRecyclerView.setHasFixedSize(true);
mFreezerRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mDatabaseFreezer = FirebaseDatabase.getInstance().getReference().child("FreezerItems");
Query query = mDatabaseFreezer;
FirebaseRecyclerOptions<Event> firebaseRecyclerOptions = new FirebaseRecyclerOptions.Builder<Event>()
.setQuery(query, Event.class).build();
firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Event, ProductHolder>(firebaseRecyclerOptions) {
#Override
protected void onBindViewHolder(ProductHolder holder, int position, Event model) {
model = mDataSet.get(position);
holder.mItemName.setText(model.getName());
holder.mItemDate.setText(model.getDate());
final Event finalModel = model;
holder.mDeleteBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mDatabaseFreezer.child(finalModel.get_id()).removeValue();
}
});
}
#Override
public ProductHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycler_view_row_inventory,parent,false);
return new ProductHolder(view);
}
};
mDatabaseFreezer.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
HashMap<String, String> value = (HashMap<String,String>) dataSnapshot.getValue();
if (value != null) {
String name = value.get("Name");
String date = value.get("Date");
String key = value.get("Key");
mDataSet.add(new Event(name,date,null, key));
Collections.sort(mDataSet, new Comparator<Event>() {
#Override
public int compare(Event event, Event t1) {
if (event.getDate() == null || t1.getDate() == null)
return 0;
return event.getDate().compareTo(t1.getDate());
}
});
}
}
#Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
}
#Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
#Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
mFreezerRecyclerView.setAdapter(firebaseRecyclerAdapter);
return root;
}
private class ProductHolder extends RecyclerView.ViewHolder{
private TextView mItemName, mItemDate;
private Button mDeleteBtn;
public ProductHolder(View itemView) {
super(itemView);
mItemName = itemView.findViewById(R.id.ItemNameTxtView);
mItemDate = itemView.findViewById(R.id.BestBeoforeTxtView);
mDeleteBtn = itemView.findViewById(R.id.deleteItem);
}
}
#Override
public void onStart() {
super.onStart();
firebaseRecyclerAdapter.startListening();
}
#Override
public void onStop() {
super.onStop();
if (firebaseRecyclerAdapter != null){
firebaseRecyclerAdapter.startListening();
}
}
private void FocusToFreezer(){
scrollView.post(new Runnable() {
#Override
public void run() {
scrollView.smoothScrollTo(0, mFreezerLayout.getTop());
}
});
}
private void FocusToRef(){
scrollView.post(new Runnable() {
#Override
public void run() {
scrollView.smoothScrollTo(0, mRefrigeratorLayout.getTop());
}
});
}
private void FocusToPantry(){
scrollView.post(new Runnable() {
#Override
public void run() {
scrollView.smoothScrollTo(0, mPantryLayout.getTop());
}
});
}
}
The only difference I could find is OnStart() and onStop() in activity are protected while on fragments are public
EDIT I found another page with the same problem and apparently FirebaseRecyclerAdapter doesn't work well with Fragments
I finally found an answer
simply remove mFreezerRecyclerView.setHasFixedSize(true);
Related
does anyone here encountered when you are updating a data it duplicates the existing data visually only but when I will back and go to the activity again it shows the real data.
Data 1 and Data 2, when I delete Data 2, it will show Data 1 Data2 and Data 1. However like I said, it is just visual had to go back and go to the activity again to show the current data which is Data 1 only since Data 2 has been deleted. I have tried searching but none of them are related to my problem and I genuinely do not know if this is from the database or the card or in the recyclerview. Any help will be much appreciated.
MainActivity
public class AdminReqFormsActivity extends AppCompatActivity {
RecyclerView adminreqform_recycler;
ImageView adminreqfromfield_backbtn;
DatabaseReference databaseReference;
ArrayList<ResearchReqForm> reqFormArrayList;
AdminRequestFormAdapter adminRequestFormAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_admin_req_forms);
adminreqform_recycler = findViewById(R.id.adminreqform_recycler);
adminreqfromfield_backbtn = findViewById(R.id.adminreqfromfield_backbtn);
databaseReference = FirebaseDatabase.getInstance().getReference("ResearchRequest");
adminreqform_recycler.setLayoutManager(new LinearLayoutManager(this));
reqFormArrayList = new ArrayList<ResearchReqForm>();
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
for (DataSnapshot dataSnapshot : snapshot.getChildren()){
ResearchReqForm researchReqForm = dataSnapshot.getValue(ResearchReqForm.class);
reqFormArrayList.add(researchReqForm);
}
adminRequestFormAdapter = new AdminRequestFormAdapter(AdminReqFormsActivity.this, reqFormArrayList);
adminreqform_recycler.setAdapter(adminRequestFormAdapter);
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
Toast.makeText(AdminReqFormsActivity.this, error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
adminreqfromfield_backbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), WelcomeAdminActivity.class));
}
});
}
}
Model
public class ResearchReqForm {
String studentName;
String requestedtitle;
String requestedtags;
String requestMessage;
String requestid;
String requestStatus;
public ResearchReqForm() {
}
public ResearchReqForm(String studentName, String requestedtitle, String requestedtags, String requestMessage, String requestid, String requestStatus) {
this.studentName = studentName;
this.requestedtitle = requestedtitle;
this.requestedtags = requestedtags;
this.requestMessage = requestMessage;
this.requestid = requestid;
this.requestStatus = requestStatus;
}
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public String getRequestedtitle() {
return requestedtitle;
}
public void setRequestedtitle(String requestedtitle) {
this.requestedtitle = requestedtitle;
}
public String getRequestedtags() {
return requestedtags;
}
public void setRequestedtags(String requestedtags) {
this.requestedtags = requestedtags;
}
public String getRequestMessage() {
return requestMessage;
}
public void setRequestMessage(String requestMessage) {
this.requestMessage = requestMessage;
}
public String getRequestid() {
return requestid;
}
public void setRequestid(String requestid) {
this.requestid = requestid;
}
public String getRequestStatus() {
return requestStatus;
}
public void setRequestStatus(String requestStatus) {
this.requestStatus = requestStatus;
}
}
Adapter
public class AdminRequestFormAdapter extends RecyclerView.Adapter<AdminRequestFormAdapter.AdminRequestFormViewHolder> {
Context context;
ArrayList<ResearchReqForm> requestFormArrayList;
public AdminRequestFormAdapter(Context c, ArrayList<ResearchReqForm> reqFormsList){
context = c;
requestFormArrayList = reqFormsList;
}
#NonNull
#Override
public AdminRequestFormViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
return new AdminRequestFormAdapter.AdminRequestFormViewHolder(LayoutInflater.from(context).inflate(R.layout.admin_request_list,parent,false));
}
#Override
public void onBindViewHolder(#NonNull AdminRequestFormViewHolder holder, final int position) {
holder.adminsudentname_reqcv.setText(requestFormArrayList.get(position).getStudentName());
holder.adminrelatedtopic_requestcv.setText(requestFormArrayList.get(position).getRequestedtitle());
holder.admintopictags_requestcv.setText(requestFormArrayList.get(position).getRequestedtags());
holder.adminbriefmessage_reqeuestcv.setText(requestFormArrayList.get(position).getRequestMessage());
holder.deleteresearch_request.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder alert = new AlertDialog.Builder(context);
alert.setTitle("Delete Request Research?");
alert.setMessage("Are you sure you want to delete?");
alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
final DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("ResearchRequest");
final String uniqueKey = requestFormArrayList.get(position).getRequestid();
databaseReference.child(uniqueKey).removeValue();
Toast.makeText(context, "Student's Request has been deleted.", Toast.LENGTH_SHORT).show();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(context, "Form Closed.", Toast.LENGTH_SHORT).show();
dialog.dismiss();
}
});
alert.show();
}
});
holder.acceptresearch_request.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(context, "Test Toast For Accept", Toast.LENGTH_SHORT).show();
}
});
}
#Override
public int getItemCount() {
return requestFormArrayList.size();
}
class AdminRequestFormViewHolder extends RecyclerView.ViewHolder{
TextView adminsudentname_reqcv, adminrelatedtopic_requestcv, admintopictags_requestcv, adminbriefmessage_reqeuestcv;
Button deleteresearch_request, acceptresearch_request;
public AdminRequestFormViewHolder(#NonNull View itemView) {
super(itemView);
adminsudentname_reqcv = itemView.findViewById(R.id.adminsudentname_reqcv);
adminrelatedtopic_requestcv =itemView.findViewById(R.id.adminrelatedtopic_requestcv);
admintopictags_requestcv = itemView.findViewById(R.id.admintopictags_requestcv);
adminbriefmessage_reqeuestcv = itemView.findViewById(R.id.adminbriefmessage_reqeuestcv);
deleteresearch_request = itemView.findViewById(R.id.deleteresearch_request);
acceptresearch_request = itemView.findViewById(R.id.acceptresearch_request);
}
}
}
Yes, this is actually quite common and comes from a misunderstanding of how Firebase snapshots work.
Whenever your onDataChange is called it gets a full snapshot of all the data at databaseReference. So even if there's only one change since you rendered the data, you get called with a full snapshot of all data at databaseReference including the change. And since you add all data in snapshot to reqFormArrayList, you end up duplicating it each time onDataChange gets called.
The simplest solution is to clear reqFormArrayList inside onDataChange:
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
reqFormArrayList.clear(); // this is the new line
for (DataSnapshot dataSnapshot : snapshot.getChildren()){
ResearchReqForm researchReqForm = dataSnapshot.getValue(ResearchReqForm.class);
reqFormArrayList.add(researchReqForm);
}
adminRequestFormAdapter = new AdminRequestFormAdapter(AdminReqFormsActivity.this, reqFormArrayList);
adminreqform_recycler.setAdapter(adminRequestFormAdapter);
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
Toast.makeText(AdminReqFormsActivity.this, error.getMessage(), Toast.LENGTH_SHORT).show();
}
})
if the page is loaded, the button is active, if not, how can I do passive control?
What I want to do is, if the Viewpager Page is loaded, the button is active, if not, the Button is Passive. But I couldn't do any kind.
Is there anyone who can help?
If viewpager2 is installed Button enabled, if viewpager2 is not installed button false;
List<Movie> movieList = new ArrayList<>();
private ImageButton btn_down, btn_fav;
private Button btn_setter;
private DatabaseReference movies;
private IFirebaseLoadDone iFirebaseLoadDone;
public CartoonFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_cartoon, container, false);
movies = FirebaseDatabase.getInstance().getReference("Sports");
movies.keepSynced(true);
iFirebaseLoadDone = this;
loadMovie();
viewPager2 = view.findViewById(R.id.viewPager2_);
btn_down = view.findViewById(R.id.btn_down);
btn_setter = view.findViewById(R.id.btn_setter);
btn_fav = view.findViewById(R.id.btn_fav);
btn_down.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
SaveToGallery();
}
});
btn_setter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
btn_fav.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
return view;
}
private void loadMovie() {
movies.addValueEventListener(this);
}
#Override
public void onFirebaseLoadSuccess(List<Movie> movieList) {
viewPagerAdapter = new ViewPagerAdapter(getContext(), movieList, viewPager2);
viewPager2.setAdapter(viewPagerAdapter);
}
#Override
public void onFirebasLoadFailed(String message) {
}
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot moviesSnapShot : dataSnapshot.getChildren())
movieList.add(moviesSnapShot.getValue(Movie.class));
Collections.reverse(movieList);
iFirebaseLoadDone.onFirebaseLoadSuccess(movieList);
viewPagerAdapter.notifyDataSetChanged();
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
iFirebaseLoadDone.onFirebasLoadFailed(databaseError.getMessage());
}
#Override
public void onDestroy() {
movies.removeEventListener(this);
super.onDestroy();
}
#Override
public void onResume() {
super.onResume();
}
#Override
public void onStop() {
movies.removeEventListener(this);
super.onStop();
}
}
Replace your methods with mine.
private void loadMovie() {
movies.addValueEventListener(this);
btn_down.setEnabled(false);
btn_fav.setEnabled(false);
btn_setter.setEnabled(false);
}
Firebase methods
#Override
public void onFirebaseLoadSuccess(List<Movie> movieList) {
viewPagerAdapter = new ViewPagerAdapter(getContext(), movieList, viewPager2);
viewPager2.setAdapter(viewPagerAdapter);
if(movieList!=null && !movieList.isEmpty()){
btn_down.setEnabled(true);
btn_fav.setEnabled(true);
btn_setter.setEnabled(true);
}
}
#Override
public void onFirebasLoadFailed(String message) {
btn_down.setEnabled(false);
btn_fav.setEnabled(false);
btn_setter.setEnabled(false);
}
There was an error loading
private void loadMovie() {
movies.addValueEventListener(this);
btn_down.setEnabled(false);
btn_fav.setEnabled(false);
btn_setter.setEnabled(false);
}
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageButton.setEnabled(boolean)' on a null object reference
at com.example.duvarlar.Fragment.CartoonFragment.loadMovie(CartoonFragment.java:386)
at com.example.duvarlar.Fragment.CartoonFragment.onCreateView(CartoonFragment.java:90)
the Adapter won't refresh unless notifyDataSetChanged is executed two times!
but when I track it in the debugger it works perfectly!
That problem happens only on sendRequest method, it works perfectly fine on other methods!
if (friendListHelper.isFriendRequestAlreadySent(user.getId())) {
holder.addFriendBtn.setText("Cancel Request");
holder.addFriendBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
cancelRequest(view, user, position);
}
});
} else if (friendListHelper.isFriend(user.getId())) {
holder.addFriendBtn.setText("Unfriend");
holder.addFriendBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
deleteFriend(view, position, user);
}
});
} else {
holder.addFriendBtn.setText("Add Friend");
holder.addFriendBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
sendRequest(user, view, position);
}
});
}
}
private void deleteFriend(final View view, final int position, QBUser user) {
friendListHelper.removeFriend(user, new QBEntityCallback<Void>() {
#Override
public void onSuccess(Void aVoid, Bundle bundle) {
notifyItemChanged(position);
}
});
}
private void cancelRequest(final View view, QBUser user, final int position) {
friendListHelper.cancelFriendRequest(user.getId(), new QBEntityCallback<Void>() {
#Override
public void onSuccess(Void aVoid, Bundle bundle) {
notifyItemChanged(position);
}
}
private void sendRequest(final QBUser user, final View view, final int position) {
friendListHelper.sendFriendRequest(user, new QBEntityCallback<Void>() {
#Override
public void onSuccess(Void aVoid, Bundle bundle) {
notifyDataSetChanged();
}
});
}
Here is the code. I am trying to make a new child and save the data but the node isn't created on firebase tree. But the code is running successfully. But after updating the sdk, it's not working.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_post__feed);
initialize();
btn_post_feed.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
UploadData();
}
});
}
private void initialize() {
edt_details = (EditText) findViewById(R.id.post_feed_description);
spinner_category = (Spinner) findViewById(R.id.post_feed_spinner);
seekBar = (SeekBar) findViewById(R.id.post_feed_number);
btn_post_feed = (Button) findViewById(R.id.post_feed_btn_post);
sharedPreferences = getSharedPreferences("MODE", Context.MODE_PRIVATE);
phn = sharedPreferences.getString("mobno", "A");
value = sharedPreferences.getInt("value", 0);
}
#Override
public void UploadData() {
reference1 = FirebaseDatabase.getInstance().getReference().child("feeds");
detailsFeeds = new DetailsFeeds();
detailsFeeds.setCategory(category);
detailsFeeds.setItemDonateName(quantity);
detailsFeeds.setPhoneNo(phn);
detailsFeeds.setItemDonateName(details);
if (value == 1)
detailsFeeds.setStatus(true);
else
detailsFeeds.setStatus(false);
reference2 = reference1.child(phn + detailsFeeds.getPostNumber());
detailsFeeds.increasePostnumber();
detailsFeeds.setPostNumber(detailsFeeds.getPostNumber());
reference2.setValue(detailsRegister, new DatabaseReference.CompletionListener() {
#Override
public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
if (databaseError == null) {
setResult(789);
finish();
} else {
Toast.makeText(getApplicationContext(), "Failed", Toast.LENGTH_SHORT).show();
setResult(786);
finish();
}
}
});
}
#Override
public void DownloadData() {
}
#Override
public void FetchFields() {
spinner_category.setOnItemSelectedListener(new CustomItemSelectedListener());
details = edt_details.getText().toString();
quantity = String.valueOf(seekBar.getProgress());
}
#Override
public boolean CheckFields() {
return false;
}
private class CustomItemSelectedListener implements AdapterView.OnItemSelectedListener {
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
category = adapterView.getItemAtPosition(i).toString();
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
}
}
Gradle
I want to show Firebase data filtered by userID. But the app crashes and after debugging it shows a NullPointerException on the Firebase adapter. What to do? I am implementing it in fragment. I am not pasting the imported libraries.
Here is my code:
public class MyPosts extends Fragment{
private RecyclerView postList;
private DatabaseReference mDatabase;
private DatabaseReference mDatabaseAppriciate;
private DatabaseReference mDatabaseDisgrace;
private LinearLayoutManager layoutManager;
private FirebaseAuth mAuth= FirebaseAuth.getInstance();
private DatabaseReference mDatabaseCurrentUser;
public Query mQueryCurrentUser=null;
//private static final String TAG = "MyActivity";
private boolean mProcessAppriciate=false;
private boolean mProcessDisgrace=false;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
View rootView = inflater.inflate(R.layout.allposts, container, false);
mDatabase= FirebaseDatabase.getInstance().getReference().child("Posts");
mDatabaseAppriciate=FirebaseDatabase.getInstance().getReference().child("Appriciate");
mDatabaseDisgrace=FirebaseDatabase.getInstance().getReference().child("Disgrace");
mDatabase.keepSynced(true);
mDatabaseAppriciate.keepSynced(true);
mDatabaseDisgrace.keepSynced(true);
//EXPERIMENT WITH LISTVIEW STARTS
postList=(RecyclerView) rootView.findViewById(R.id.postList);
postList.setHasFixedSize(true);
layoutManager=new LinearLayoutManager(getActivity());
layoutManager.setReverseLayout(true);
postList.setHasFixedSize(true);
postList.setLayoutManager(layoutManager);
postList.getRecycledViewPool().clear();
//EXPERIMENT WITH LISTVIEW ENDS
return rootView;
}
#Override
public void onStart() {
super.onStart();
//EXP CODE STARTS
FirebaseAuth.getInstance().addAuthStateListener(new FirebaseAuth.AuthStateListener() {
#Override
public void onAuthStateChanged(#NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
// User is signed in
mDatabaseCurrentUser=FirebaseDatabase.getInstance().getReference().child("Posts");
String currentUserId=user.getUid();
mQueryCurrentUser=mDatabaseCurrentUser.orderByChild("uid").equalTo(currentUserId);
}else{
}
}
});
//EXP CODE ENDS
FirebaseRecyclerAdapter<Posts,PostViewHolder> firebaseRecyclerAdapter= new FirebaseRecyclerAdapter<Posts,PostViewHolder>(
Posts.class,
R.layout.single_post,
PostViewHolder.class,
mQueryCurrentUser
) {
#Override
protected void populateViewHolder(final PostViewHolder viewHolder, final Posts model, final int position) {
final String post_key=getRef(position).getKey();
viewHolder.setTitle(model.getTitle());
viewHolder.setDescription(model.getDescription());
viewHolder.setProfileName(model.getProfilename());
viewHolder.setImage(getContext(),model.getImage());
viewHolder.getLayoutPosition();
viewHolder.setAppriciateButton(post_key);
viewHolder.setDisgraceButton(post_key);
//Share click code below
viewHolder.Share.setOnClickListener(new View.OnClickListener() {
CallbackManager callbackManager;
ShareDialog shareDialog;
#Override
public void onClick(View v) {
FacebookSdk.sdkInitialize(getApplicationContext());
callbackManager = CallbackManager.Factory.create();
shareDialog = new ShareDialog(MyPosts.this);
if (ShareDialog.canShow(ShareLinkContent.class)) {
ShareLinkContent content = new ShareLinkContent.Builder()
.setContentTitle(model.getTitle())
.setContentDescription(model.getDescription())
.setImageUrl(Uri.parse(model.getImage()))
.setContentUrl(Uri.parse("https://developers.facebook.com"))
.build();
shareDialog.show(content);
shareDialog.registerCallback(callbackManager, new FacebookCallback<Sharer.Result>() {
#Override
public void onSuccess(Sharer.Result result) {
}
#Override
public void onCancel() {
}
#Override
public void onError(FacebookException error) {
}
});
}
}
});
//Share click code ends above
//Appriciate button on click event below
viewHolder.Appriciate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mProcessAppriciate=true;
mDatabaseAppriciate.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (mProcessAppriciate) {
if (dataSnapshot.child(post_key).hasChild(mAuth.getCurrentUser().getUid())) {
mDatabaseAppriciate.child(post_key).child(mAuth.getCurrentUser().getUid()).removeValue();
mProcessAppriciate = false;
}else {
mDatabaseAppriciate.child(post_key).child(mAuth.getCurrentUser().getUid()).setValue(mAuth.getCurrentUser().getDisplayName());
mProcessAppriciate = false;
}
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
});
//Appriciate button click event CODE ENDS
//Disgrace Button Click Event Code Starts
viewHolder.Disgrace.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mProcessDisgrace=true;
mDatabaseDisgrace.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (mProcessDisgrace) {
if (dataSnapshot.child(post_key).hasChild(mAuth.getCurrentUser().getUid())) {
mDatabaseDisgrace.child(post_key).child(mAuth.getCurrentUser().getUid()).removeValue();
mProcessDisgrace = false;
} else {
mDatabaseDisgrace.child(post_key).child(mAuth.getCurrentUser().getUid()).setValue(mAuth.getCurrentUser().getDisplayName());
mProcessDisgrace = false;
}
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
});
//Disgrace Button Click code Ends
}
};
postList.setAdapter(firebaseRecyclerAdapter);
//test code
firebaseRecyclerAdapter.notifyDataSetChanged();
}
public static class PostViewHolder extends RecyclerView.ViewHolder{
View mView;
Button Appriciate;
Button Disgrace;
Button Share;
DatabaseReference mDatabaseAppriciate;
DatabaseReference mDatabaseDisgrace;
FirebaseAuth mAuth;
public PostViewHolder(View itemView) {
super(itemView);
mView=itemView;
Appriciate=(Button) mView.findViewById(R.id.appriciate);
Disgrace=(Button) mView.findViewById(R.id.disgraceful);
Share=(Button) mView.findViewById(R.id.share);
mDatabaseAppriciate=FirebaseDatabase.getInstance().getReference().child("Appriciate");
mDatabaseDisgrace=FirebaseDatabase.getInstance().getReference().child("Disgrace");
mAuth=FirebaseAuth.getInstance();
mDatabaseAppriciate.keepSynced(true);
mDatabaseDisgrace.keepSynced(true);
}
public void setAppriciateButton(final String post_key){
mDatabaseAppriciate.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
if(dataSnapshot.child(post_key).hasChild(mAuth.getCurrentUser().getUid())){
Appriciate.setBackgroundColor(Color.GRAY);
Appriciate.setText("Appriciated");
}else{
Appriciate.setBackgroundColor(Color.GREEN);
Appriciate.setText("APPRICIATE");
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
//SET DISGRACE BUTTON CODE BELOW
public void setDisgraceButton(final String post_key){
mDatabaseDisgrace.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
if(dataSnapshot.child(post_key).hasChild(mAuth.getCurrentUser().getUid())){
Disgrace.setBackgroundColor(Color.GRAY);
Disgrace.setText("Disgraced");
}else{
Disgrace.setBackgroundColor(Color.RED);
Disgrace.setText("DISGRACE");
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
//SET DISGRACE BUTTON CODE ENDS
//Setting the title to the AllActivity
public void setTitle(String title){
TextView postTitle=(TextView) mView.findViewById(R.id.allPostTitle);
postTitle.setText(title);
}
public void setDescription(String description){
TextView postDescription=(TextView) mView.findViewById(R.id.allPostDescription);
postDescription.setText(description);
}
//PROFILE NAME EXPERIMENT
public void setProfileName(String profilename){
TextView postName=(TextView) mView.findViewById(R.id.profileName);
postName.setText(profilename);
}
public void setImage(final Context context, final String image) {
final ImageView postImage=(ImageView) mView.findViewById(R.id.allPostImage);
with(context).load(image).networkPolicy(NetworkPolicy.OFFLINE).into(postImage, new Callback() {
#Override
public void onSuccess() {
}
#Override
public void onError() {
Picasso.with(context).load(image).resize(500,700).into(postImage);
}
});
}
//THREADING EXPERIMENT CODE
}
}