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
Related
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.
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)
}
}
This is my model class and i have these types of json to convert in to this model. How i can do that with Moshi (Using Retrofit)
data class(var Id:Int, var image:List<String>)
{"Id":188, "image":"\/posts\/5fd9aa6961c6dd54129f51d1.jpeg"}
{"Id":188, "image":["\/posts\/5fd9aa6961c6dd54129f51d1.jpeg","\/posts\/5fd9aa6961c6dd54129f51d1.jpeg"]}
Your case is a bit unorthodox, in general I would avoid designing JSONs with matching field names but different signature. Anyway, the solution:
Define your model as follow:
data class MyModel(
#Json(name = "Id") val Id: Long,
#Json(name = "image") val images: List<String>
)
Then, you will have to create a custom adapter for it:
class MyModelAdapter {
#ToJson
fun toJson(model: MyModel): String {
// MyModel is data class so .toString() should convert it to correct Json format with
// image property as list of image path strings
return model.toString()
}
#FromJson
fun fromJson(reader: JsonReader): MyModel = with(reader) {
// We need to manually parse the json
var id: Long? = null
var singleImage: String? = null
val imageList = mutableListOf<String>()
beginObject()
while (hasNext()) {
// iterate through the JSON fields
when (nextName()) {
"Id" -> id = nextLong() // map the id field
"image" -> { // map the image field
when (peek()) {
JsonReader.Token.BEGIN_ARRAY -> {
// the case where image field is an array
beginArray()
while(hasNext()) {
val imageFromList = nextString()
imageList.add(imageFromList)
}
endArray()
}
JsonReader.Token.STRING -> {
// the case where image field is single string
singleImage = nextString()
}
else -> skipValue()
}
}
else -> skipValue()
}
}
endObject()
id ?: throw IllegalArgumentException("Id should not be null")
val images = if (singleImage != null) {
listOf(singleImage)
} else {
imageList
}
MyModel(Id = id, images = images)
}
}
Then, add the adapter to your moshi builder:
Moshi.Builder()
.add(MyModelAdapter())
.build()
That should do it. For complete code base, you can check my demo I just created that mirrors your case:
https://github.com/phamtdat/MoshiMultipleJsonDemo
data class Movie(
#SerializedName("movie_name")
val movieName : String
#SerializedName("genres")
val movieGenre : List<String>){}
How can I convert a list to string created every object in this data class
You can use additional property in Movie class to convert list to string, e.g. val genre:
data class Movie(
#SerializedName("movie_name")
val movieName: String,
#SerializedName("genres")
val movieGenre: List<String>
) {
val genre: String
get() = buildString { // builds new string using append() method on each item of movieGenre
movieGenre.forEach { append(it) }
}
}
Here is how to access it:
val movie: Movie = getMoviewFromInternet()
val movieGenre: String = movie.genre
That's achievable in Kotlin via joinToString(separator: String), like this:
data class Movie(
#SerializedName("movie_name")
val movieName : String,
#SerializedName("genres")
val movieGenre : List<String>
) {
val genre: String
// concatenate the items using the separator provided
get() = movieGenre.joinToString(" ")
}
You would use it in a main as follows
fun main() {
val genreList: List<String> = listOf(
"Horror", "Splatter", "Romance", "Comedy", "Mystery", "Adult"
)
val movieName = "A.R. Bitrary"
val movie = Movie(movieName, genreList)
println(movie.genre)
}
which then outputs
Horror Splatter Romance Comedy Mystery Adult