I have this app that someone can delete his document at any time so if he deletes the document I want every other user to get updated the document has been removed and remove the document from the listView, it's more like a Food Ordering app so the user order could be taking by another Driver so the document will no longer be available for other users, I want to update the recyclerView Whenever a user deletes a document, so how to get the position without clicking how to detect that change to get the position, Sorry if I couldn't explain much I'm Using Groupie Adapter
val ref = firestore.collection("orders").whereNotEqualTo("userUid", uid)
val adapter = GroupAdapter<GroupieViewHolder>()
ref.addSnapshotListener { value, error ->
if (error != null){
return#addSnapshotListener
}
value?.documentChanges?.forEach {
if (it.type == DocumentChange.Type.ADDED) {
val userUid = it.document.data.get("userUid") as String
val userPhone = it.document.data.get("phone") as String
val userName = it.document.data.get("name") as String
val time = it.document.data.get("time") as String
val marketName = it.document.data.get("marketName") as String
val amount = it.document.data.get("amount") as String
val storeimgUrl = it.document.data.get("storeImg") as String
val order = it.document.data.get("order") as String
val userImg = it.document.data.get("userImg") as String
adapter.add(DriverOrders(userUid, userPhone, userName, time, marketName, amount, storeimgUrl, order, userImg))
adapter.notifyDataSetChanged()
}
if(it.type == DocumentChange.Type.REMOVED){
// here Wher I'm trying to get the position of deleted Or removed data
if (it.document.id == DriverOrders.docId){
adapter.notifyItemRemoved(it.oldIndex)
}
}
}
recyclerview_driverorders.adapter = adapter
}
class DriverOrders(val userUid: String, val userPhone: String,
val userName: String, val time: String,
val marketName: String, val amount: String, val storeimgUrl: String, val order: String,
val userImg: String):Item<GroupieViewHolder>() {
override fun getLayout(): Int {
return R.layout.driver_row
}
override fun bind(viewHolder: GroupieViewHolder, position: Int) {
viewHolder.itemView.driverorders_sName.text = marketName
viewHolder.itemView.driverorders_order.text = order
viewHolder.itemView.driverorders_time.text = Date
Picasso.get().load(storeimgUrl).fit().into(viewHolder.itemView.driverorders_sImg)
}
}
Related
I want to create imageview as many as arraylist size. I have images arrayList type of String which are image strings from Firestore. I get the data and give it to Recyclerview, but I don't know how to create imageview as size of imageList in item.
DataClass
data class AjansGruplariChat(
val images: ArrayList<String?>,
val isRead: ArrayList<String?>,
val message: String,
val selection: String,
val sender: String,
val timeStamp: String)
Firestore Data
Firestore Repo
firebaseFireStore.collection("Agencies").document(docId)
.collection("Chat")
.addSnapshotListener { value, error ->
if (error == null) {
val documents2 = value?.documents
if (documents2 != null) {
val list = mutableListOf<AjansGruplariChat>()
for (document2 in documents2) {
val images = document2.get("images") as ArrayList<String?>
val isRead = document2.get("isRead") as ArrayList<String?>
val message = document2.get("message").toString()
val selection = document2.get("selection").toString()
val sender = document2.get("sender").toString()
val timeStamp = document2.get("timeStamp").toString()
val newAjansGrupChat = AjansGruplariChat(images, isRead, message, selection, sender, timeStamp)
list.add(newAjansGrupChat)
}
ajansChatListRepo.value = list
}
}
}
ItemCard
On clicking like button , it is not either increasing like count in UI nor adding a userid in likes array. It is not adding a userid into an array instead it is updating value at 0th index. I am attaching photos of logic to add values in array in firestore.
I have also added the project on github. Please take a look at it for more clearification.
https://github.com/Anshi10/Social-Media-App
Post data class which has array of user ids which liked a post.
data class Post(
val text : String = "" ,
val createdBy : user = user() ,
val createdAt : Long = 0L ,
val Likes : ArrayList<String> = ArrayList()
)
Post Dao for adding post into firestore and updating likes
class PostDao {
val db = FirebaseFirestore.getInstance()
val PostCollection = db.collection("Post")
val auth = Firebase.auth
fun addPost(text : String){
//!! is to ensure that post is created only when user is logged in otherwise it will count as illegal exception
val currentUserId = auth.currentUser!!.uid
val userdao = userDao()
GlobalScope.launch{
//getuserbyid return task which will turn into object of user data class
val Postuser = userdao.getuserbyId(currentUserId).await().toObject(user::class.java)!!
//this will give the time when the post is created
val currentTime = System.currentTimeMillis()
val post = Post(text,Postuser,currentTime)
PostCollection.document().set(post)
}
}
fun getPostById(postid : String) : Task<DocumentSnapshot>{
return PostCollection.document(postid).get()
}
fun updateLikes(postid: String) {
GlobalScope.launch {
val currentUserid = auth.currentUser!!.uid
val post = getPostById(postid).await().toObject(Post::class.java)!!
val isliked = post.Likes.contains(currentUserid)
if (isliked) {
post.Likes.remove(currentUserid)
} else {
post.Likes.add(currentUserid)
}
PostCollection.document(postid).set(post)
}
Log.d("msg","updateLikes called")
}
}
onBindViewHolder function
override fun onBindViewHolder(holder: PostViewHolder, position: Int, model: Post) {
holder.userName.text = model.createdBy.name
holder.userText.text = model.text
//with(context) load(url) into(view)
Glide.with(holder.userImage.context).load(model.createdBy.imageUrl).circleCrop().into(holder.userImage)
holder.Likecount.text = model.Likes.size.toString()
holder.userTime.text = Utils.getTimeAgo(model.createdAt)
val auth = FirebaseAuth.getInstance()
val currentuserId = auth.currentUser!!.uid
val isliked = model.Likes.contains(currentuserId)
if(isliked){
holder.likeButton.setImageDrawable(ContextCompat.getDrawable(holder.likeButton.context,R.drawable.ic_baseline_favorite_24))
}
else{
holder.likeButton.setImageDrawable(ContextCompat.getDrawable(holder.likeButton.context,R.drawable.unliked))
}
}
}
Firestore structure
first collection named post which contains field createdAt , createdBy,likesCount,text of the post.
second collection named users which contains field id , imageUrl , name
calculateButton.setOnClickListener {
val panelC = binding.panelCount.text.toString()
val panelS = binding.panelSize.text.toString()
val landS = binding.landSlope.text.toString()
val landSi = binding.landSize.text.toString()
val cit = binding.city.text.toString()
val sun = (1000).toInt()
val air = (1.25).toFloat()
val cel = (25).toInt()
val verim = ((sun * air)/ cel).toString().toDouble()
if (panelC.equals("") || panelS.equals("")|| landS.equals("")|| landSi.equals("")||cit.equals("")){
Toast.makeText(requireContext(),"Alanları Doldurunuz.", Toast.LENGTH_SHORT).show()
}
else{
val action = SignUpCalculateFragmentDirections.actionSignUpCalculateFragmentToDataFragment()
Navigation.findNavController(view).navigate(action)
}
val postMap = hashMapOf<String, Any>()
postMap.put("Panel Sayisi",binding.panelCount.text.toString())
postMap.put("Panel Boyutu",binding.panelSize.text.toString())
postMap.put("Arazi Eğimi",binding.landSlope.text.toString())
postMap.put("Arazi Boyutu",binding.landSize.text.toString())
postMap.put("Şehir",binding.city.text.toString())
postMap.put("date", Timestamp.now())
postMap.put("verim",verim.toString().toDouble())
firestore.collection("Posts").add(postMap).addOnFailureListener {
}.addOnFailureListener {
Toast.makeText(requireContext(),it.localizedMessage,Toast.LENGTH_SHORT).show()
}
There is a calculatePage Fragment Codes. On this page, I am trying to make a yield calculation based on the data I receive from the user. However, I need to add the values that are kept constant in the efficiency calculation, such as "sun", "cel", "air" that I defined in the code. I wrote a random operation there as an example. To see if I can write inside the text I'm trying to print without getting any errors. But the app crashed.
private fun getData(){
firestore.collection("Posts").addSnapshotListener { value, error ->
if (error!=null){
Toast.makeText(requireContext(),error.localizedMessage,Toast.LENGTH_SHORT).show()
}else{
if (value !=null){
if (!value.isEmpty){
val documents = value.documents
for (document in documents){
val pc = document.get("Panel Sayisi") as String
val ps = document.get("Panel Boyutu") as String
val ls = document.get("Arazi Eğimi") as String
val lsi = document.get("Arazi Boyutu") as String
val c = document.get("Şehir") as String
val v = document.get("verim") as Double
val post = Post(pc,ps,ls,lsi,c,v)
postArrayList.add(post)
}
}
}
}
val db = FirebaseFirestore.getInstance()
db.collection("Posts").orderBy("date",Query.Direction.DESCENDING).limit(1)
.get()
.addOnCompleteListener {
val result : StringBuffer = StringBuffer()
if (it.isSuccessful){
for (document in it.result){
result.append(document.data.getValue("verim"))
}
verimText.setText(result)
}
}
On this page, I added the values I defined in my class named 'post' to the postList and added them to Firestore.
data class Post(val pc: String, val ps: String, val ls: String, val lsi: String, val c: String, val v : Double)
#ServerTimestamp
var date: Date? = null
This is my post class
The error is like this: java.lang.NullPointerException: null cannot be cast to non-null
type kotlin.Double
As I explained at the beginning of my question, what I am trying to do is using both the data such as "panelCount", "panelSize" that I get from the user and the "sun", "cel", "air" values that are defined as constants, using the "verimText.setText(result)" in the DataFragment page. I need to show this calculation to the user.
The user enters values such as 'Panel Sayisi', 'Panel Boyutu' that should be used while calculating on the calculation page. I need to show this to the user in verimText using both this data and the 'cel', 'sun', 'air' constants that I wrote in the first code.
PS: verim: 20000 value is the result of hypothetical values that I wrote in the first code. In this part, I need to make a calculation using the other data entered by the user and these constant values and show it in the verimText.
How can I get the UID from all users from my database with the structure below and save it in my FirebaseRecyclerviewUI? I have tried for several hours but my recycler view still displays null.
-User
|
-uid
|
-advert
|
-bus_name
-category
-purl
-id
Below is my getter/setter BusinessListData class that serves as the model for receiving the values and sending them to recyclerview
class BusinessListData {
var id: String = ""
var propixurl: String = ""
var business_name: String = ""
var category: String = ""
constructor(){
}
constructor(id: String, propixurl: String, business_name: String, category: String) {
this.id = id
this.propixurl = propixurl
this.business_name = business_name
this.category = category
}
fun getID(): String{
return id
}
fun getUrl(): String{
return propixurl
}
fun getBusName(): String{
return business_name
}
fun getCate(): String{
return category
}
fun setID(id: String){
this.id = id
}
fun setUrl(propixurl: String){
this.propixurl = propixurl
}
fun setBusName(business_name: String){
this.business_name = business_name
}
fun setCate(category: String){
this.category = category
}
}
My FirebaseRecyclerViewUI details are below. The mDatabase is the reference to the database and I tried getting the snapshot of the data which was successful according to my Log.v values. The problem is that I could not get the specific values under the Advert tree in my Firebase RealTime Database
mDatabase = FirebaseDatabase.getInstance().reference
val options: FirebaseRecyclerOptions<BusinessListData> = FirebaseRecyclerOptions.Builder<BusinessListData>()
.setQuery(mDatabase, object: SnapshotParser<BusinessListData> {
override fun parseSnapshot(snapshot: DataSnapshot): BusinessListData {
Log.v("snapshotfire", snapshot.toString()) //returns all snapshot values
Log.v("snapshotfire", snapshot.child("purl").toString()) // this returns null
Log.v("snapshotfire", snapshot.child("bus_name").getValue().toString()) //this also returns null
return BusinessListData(snapshot.child("id").getValue().toString(),
snapshot.child("purl").getValue().toString(),
snapshot.child("bus_name").getValue().toString(),
snapshot.child("category").getValue().toString()
)
}
})
.build()
When you set a certain query or database reference to the FirebaseUI adapters, it will show each child node of that reference/query. Since you pass in the root of your database, your parseSnapshot will be called for each child node of the root, which does not seem to be what you want.
To show the child nodes of the User node, pass in a reference to that node:
mDatabase = FirebaseDatabase.getInstance().reference
val options: FirebaseRecyclerOptions<BusinessListData> = FirebaseRecyclerOptions.Builder<BusinessListData>()
.setQuery(mDatabase.child("User"), object: SnapshotParser<BusinessListData> {
...
Now your parseSnapshot will be called for each child node of User, and you can get the necessary keys/values from that snapshot.
For example, to get the UID you can either read the snapshot's key or its advert/uid property:
override fun parseSnapshot(snapshot: DataSnapshot): BusinessListData {
Log.v("snapshotfire", snapshot.key)
Log.v("snapshotfire", snapshot.child("advert/id").getValue())
)
I am trying to listen to my database child changes, in my case it is orders.
Below is a picture of my database, where
ODdPag... Is the uid of my customer
Lu-_1A is just .push random order naming
I can provide my code but it is confusing and not working, because i can only access Orders and not its next child.
Now I want to list all my orders and lister for changes in sub children (in order names) not uid.
I am using:
val db = FirebaseDatabase.getInstance.reference
val ref = db.child("/Orders/")
ref.addChildEventListener(object: ChildEventListener {
override fun onChildAdded(p0: DataSnapshot, p1: String?) {
ringtone.play()
itemListTable.clear()
p0.children.forEach {
it.child("order").children.forEach{ item ->
val newData = item.getValue(itemListData::class.java) ?: return
newData.itemName = item.key!!
newData.orderKey = it.key!!
itemListTable.add(newData)
}
val data = it.getValue(itemRowData::class.java) ?: return
adapter.add(itemRow(data.phoneNumber,data.time,data.locationLat,data.locationLong,data.optionalAddress,data.optionalNote,data.totalPrice,itemListTable,it.key))
}
}
override fun onChildChanged(p0: DataSnapshot, p1: String?) {
Log.d("ac1234","$p0")
p0.child("order").children.forEach{ item ->
Log.d("ac1234","1")
val newData = item.getValue(itemListData::class.java) ?: return
Log.d("ac1234","2")
newData.itemName = item.key!!
newData.orderKey = p0.key!!
itemListTable.add(newData)}
val data = p0.getValue(itemRowData::class.java) ?: return
adapter.add(itemRow(data.phoneNumber,data.time,data.locationLat,data.locationLong,data.optionalAddress,data.optionalNote,data.totalPrice,itemListTable,p0.key))
}
class itemRowData(val phoneNumber :String = "",val time :String = "",val locationLat :Double = 0.0,val locationLong :Double = 0.0,val optionalAddress :String = "",val optionalNote :String = "",val totalPrice :String = "")
class itemListData(var itemName: String = "" ,val totalQuantity: String = "",val totalPrice :Long = 0,var orderKey :String = "")
Logcat: 1 and 2 are not called
P0 shows 4 rows full of all data every time I send an order
I want all orders from all users, that is my problem. I cant reference to every ("/Orders/uid") to listen to child changes
To get all orders of all users, you should use a ValueEventListener, like in the following lines of code:
val rootRef = FirebaseDatabase.getInstance().reference
val ordersRef = rootRef.child("Orders")
val valueEventListener = object : ValueEventListener {
override fun onDataChange(dataSnapshot: DataSnapshot) {
for (uidDataSnapshot in dataSnapshot.children) {
for (orderDataSnapshot in uidDataSnapshot.children) {
val newData = orderDataSnapshot.getValue(itemListData::class.java)
itemListTable.add(newData)
}
}
}
override fun onCancelled(databaseError: DatabaseError) {
Log.d(TAG, databaseError.getMessage()) //Don't ignore errors!
}
}
ordersRef.addValueEventListener(valueEventListener)
See, in order to get each order of each user, you should iterate twice, once to get the uidDataSnapshot and then to get the orderDataSnapshot object.