I'm working on a blog app where I've created the card_view in which the user name, profile picture, time of post and other details are displayed. As of now everything is fine except one thing the time and date. Now this is a thing which is taking a hell lot of time on researching but the thing is that my work is not getting solved.
1. Work till now on Time and date
- What I've done is I've saved the user posting time in TIMESTAMP.
- Now in order to achieve my goal i.e., to retrieve the post_time in human readable form I've done a lot of researches on how to change the data from timestamp form to nonth and year, hours format.
My post_time is in LONG in my POJO and it is being stored in my database successfully
In my BlogFragment I'm retrieving my details.
2. Blog.java
public void setPost_time(Long post_time){
TextView time = (TextView) mView.findViewById(R.id.post_time);
DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
Date date = null;
try {
date = dateFormat.parse(post_time.toString());
} catch (ParseException e) {
e.printStackTrace();
}
time.setText(dateFormat.format(date));
}
I've done the above code after following a lot of codes on Stackoverflow but never got a solution.
My searches for solution:
To fix nullpointerexception on date format
Java Illegal argument on the date format
Populate the date and time in human readable form in listview
I've tried one more thing in order to convert the TIMESTAMP format to human readable format which goes like this:
Convert timestamp format into hour and date format
I got the error in my logcat when I implemented the above code in Blog.java
3. LogCat
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.aadarshkumarsingh.project1, PID: 10460
com.google.firebase.database.DatabaseException: Failed to convert a value of type java.lang.String to long
at com.google.android.gms.internal.zzbqi.zzaA(Unknown Source)
at com.google.android.gms.internal.zzbqi.zzc(Unknown Source)
at com.google.android.gms.internal.zzbqi.zzb(Unknown Source)
at com.google.android.gms.internal.zzbqi.zza(Unknown Source)
at com.google.android.gms.internal.zzbqi.zzb(Unknown Source)
at com.google.android.gms.internal.zzbqi$zza.zze(Unknown Source)
at com.google.android.gms.internal.zzbqi$zza.zzaG(Unknown Source)
at com.google.android.gms.internal.zzbqi.zze(Unknown Source)
at com.google.android.gms.internal.zzbqi.zzb(Unknown Source)
at com.google.android.gms.internal.zzbqi.zza(Unknown Source)
at com.google.firebase.database.DataSnapshot.getValue(Unknown Source)
at com.firebase.ui.database.FirebaseRecyclerAdapter.parseSnapshot(FirebaseRecyclerAdapter.java:151)
at com.firebase.ui.database.FirebaseRecyclerAdapter.getItem(FirebaseRecyclerAdapter.java:140)
at com.firebase.ui.database.FirebaseRecyclerAdapter.onBindViewHolder(FirebaseRecyclerAdapter.java:183)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:5825)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:5858)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5094)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4970)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2029)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1414)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1377)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:578)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3315)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3124)
at android.support.v7.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1549)
at android.support.v7.widget.RecyclerView$1.run(RecyclerView.java:305)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:871)
at android.view.Choreographer.doCallbacks(Choreographer.java:683)
at android.view.Choreographer.doFrame(Choreographer.java:616)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:857)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
My database looks like this:
Database Snapshot
mDatabaseUsers.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
//now getting the title,desc and image inside the specified field in our
//databse
newPost.child("title").setValue(title_val);
newPost.child("desc").setValue(title_desc);
newPost.child("image").setValue(downloadUrl.toString());
//for future purpose if we want the app to have a feature of
//visiting the user's profile
newPost.child("uid").setValue(mCurrentUser.getUid());
newPost.child("post_time").setValue(ServerValue.TIMESTAMP);
//returns the data from the users database object
newPost.child("username").setValue(dataSnapshot.child("name").getValue());
newPost.child("userpic").setValue(dataSnapshot.child("image").getValue());
}
Please help me with this, as it is very important to me and will make my app look more user friendly.
UPDATE
@Override
public void onStart() {
super.onStart();
FirebaseRecyclerAdapter<NewsBlog, BlogViewHolder> firebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<NewsBlog, BlogViewHolder>(
NewsBlog.class,
R.layout.blog_row,
BlogViewHolder.class,
mChildRef) {
@Override
protected void populateViewHolder(BlogViewHolder viewHolder, NewsBlog model, int position) {
viewHolder.setTitle(model.getTitle());
viewHolder.setImage(getContext(),model.getImage());
viewHolder.setDesc(model.getDesc());
viewHolder.setUsername(model.getUsername());
viewHolder.setPost_time(model.getPost_time());
viewHolder.setUserpic(getContext(),model.getUserpic());
}
};
mBlogList.setAdapter(firebaseRecyclerAdapter);
}
UPDATE
NewsBlog.java
public class NewsBlog {
String image;
String desc;
String title;
String username;
Long post_time;
String userpic;
public NewsBlog(){
}
public NewsBlog(String image, String desc, String title, String username,
String userpic, Long post_time) {
this.image = image;
this.desc = desc;
this.title = title;
this.post_time = post_time;
this.username = username;
this.userpic = userpic;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Long getPost_time() {
return post_time;
}
public void setPost_time(Long post_time) {
this.post_time = post_time;
}
public String getUserpic() {
return userpic;
}
public void setUserpic(String userpic) {
this.userpic = userpic;
}}
Blog.java
public class Blog extends Fragment {
private RecyclerView mBlogList;
private DatabaseReference mDatabse,mChildRef;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
private DatabaseReference mDatabaseUsers,mChildUsers;
public Blog() {
// 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_blog, container, false);
mDatabse = FirebaseDatabase.getInstance().getReference();
mChildRef = mDatabse.child("Blog");
mChildRef.keepSynced(true);
mDatabaseUsers = FirebaseDatabase.getInstance().getReference();
mChildUsers = mDatabaseUsers.child("Users");
mChildUsers.keepSynced(true);
mBlogList = (RecyclerView) view.findViewById(R.id.blog_list);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
mBlogList.setHasFixedSize(true);
mBlogList.setLayoutManager(linearLayoutManager);
return view;
}
@Override
public void onStart() {
super.onStart();
FirebaseRecyclerAdapter<NewsBlog, BlogViewHolder> firebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<NewsBlog, BlogViewHolder>(
NewsBlog.class,
R.layout.blog_row,
BlogViewHolder.class,
mChildRef) {
@Override
protected void populateViewHolder(BlogViewHolder viewHolder, NewsBlog model, int position) {
viewHolder.setTitle(model.getTitle());
viewHolder.setImage(getContext(),model.getImage());
viewHolder.setDesc(model.getDesc());
viewHolder.setUsername(model.getUsername());
viewHolder.setPost_time(model.getPost_time());
viewHolder.setUserpic(getContext(),model.getUserpic());
}
};
mBlogList.setAdapter(firebaseRecyclerAdapter);
}
public static class BlogViewHolder extends RecyclerView.ViewHolder{
View mView;
public BlogViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setTitle(String title){
TextView post_title = (TextView) mView.findViewById(R.id.post_title);
post_title.setText(title);
}
public void setImage(Context ctx, String image){
ImageView post_image = (ImageView) mView.findViewById(R.id.post_image);
Picasso.with(ctx).load(image).into(post_image);
}
public void setDesc(String desc){
TextView post_desc = (TextView) mView.findViewById(R.id.post_desc);
post_desc.setText(desc);
}
public void setUsername(String username){
TextView mUsername = (TextView) mView.findViewById(R.id.post_username);
mUsername.setText(username);
}
public void setPost_time(Long post_time){
TextView time = (TextView) mView.findViewById(R.id.post_time);
DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
Date date = null;
try {
date = dateFormat.parse(post_time.toString());
} catch (ParseException e) {
e.printStackTrace();
}
time.setText(dateFormat.format(date));
}
public void setUserpic(Context ctx, String userpic){
ImageView userImage = (ImageView) mView.findViewById(R.id.post_userpic);
Picasso.with(ctx).load(userpic).into(userImage);
}
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.blog_menu, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.blog_items1){
//for checking whether the user has logged in or not
mAuth = FirebaseAuth.getInstance();
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if(firebaseAuth.getCurrentUser() == null){
((AppCompatActivity)getActivity()).getSupportActionBar().setTitle("Login");
Login login = new Login();
android.support.v4.app.FragmentTransaction fragmentTransaction =
getActivity().getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, login);
fragmentTransaction.commit();
} else {
((AppCompatActivity)getActivity()).getSupportActionBar().setTitle("AddBlog");
PostActivity postActivity = new PostActivity();
android.support.v4.app.FragmentTransaction fragmentTransaction =
getActivity().getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, postActivity);
fragmentTransaction.commit();
}
}
};
mAuth.addAuthStateListener(mAuthListener);
mAuth.removeAuthStateListener(mAuthListener);
}else if(id == R.id.logout) {
//logout action
mAuth = FirebaseAuth.getInstance();
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if(firebaseAuth.getCurrentUser() != null){
mAuth.signOut();
Toast.makeText(getContext()," Successfully Logged Out!",Toast.LENGTH_SHORT)
.show();
((AppCompatActivity)getActivity()).getSupportActionBar().setTitle("Login");
Login login = new Login();
android.support.v4.app.FragmentTransaction fragmentTransaction =
getActivity().getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, login);
fragmentTransaction.commit();
}else{
Toast.makeText(getContext(),"Log in first!",Toast.LENGTH_SHORT)
.show();
}
}
};
mAuth.addAuthStateListener(mAuthListener);
mAuth.removeAuthStateListener(mAuthListener);
}
return super.onOptionsItemSelected(item);
}}
