I don't know what the problem is but same code works fine in java
Here is my adapter class:
class MainAdapter(private val context: Context, private val firebaseVisionlabel: ArrayList<FirebaseVisionLabel>) : RecyclerView.Adapter<CustomViewHolder>() {
override fun getItemCount(): Int {
return firebaseVisionlabel.size
}
override fun onCreateViewHolder(p0: ViewGroup, p1: Int): CustomViewHolder {
val v = LayoutInflater.from(context).inflate(R.layout.list_items,p0,false)
return CustomViewHolder(v)
}
override fun onBindViewHolder(p0: CustomViewHolder, p1: Int) {
val firebaseVisionLabel = firebaseVisionlabel?.get(p1)
val label = firebaseVisionLabel?.label
val confidence =firebaseVisionLabel?.confidence.toString()
p0.itemView.textView.text = label
p0.itemView.confidence.text = confidence
}
}
class CustomViewHolder(v:View) : RecyclerView.ViewHolder(v)
MainActivity: (Global declaration)
var fileUri: Uri? = null
var TAG = "MainActivity"
var firebaseVisionLabels : ArrayList<FirebaseVisionLabel>? = null
In onCreate :
rec_view.layoutManager = LinearLayoutManager(this)
rec_view.setHasFixedSize(true)
Button :
detect_button.setOnClickListener{
imageRecognition()
}
Function :
private fun imageRecognition() {
var bitmap = MediaStore.Images.Media.getBitmap(this.contentResolver, fileUri)
var image = FirebaseVisionImage.fromBitmap(bitmap)
val labeler = FirebaseVision.getInstance().visionLabelDetector
labeler.detectInImage(image)
.addOnSuccessListener { labels ->
for (label in labels) {
val text = label.label
val entityId = label.entityId
val confidence = label.confidence
Log.d("TAG", "$text $confidence") //logcat works
firebaseVisionLabels?.add(label)
//Main problem??
rec_view.adapter = firebaseVisionLabels?.let { MainAdapter(this, it) }
}
}.addOnFailureListener { e ->
// Task failed with an exception
// ...
detect_button.isEnabled = true
Log.d(TAG,e.toString())
}
}
Logcat prints the expected outputs but I don't know what the problem is in recyclerview. I don't want to put bunch of camera and gallery intents codes, they works fine. Thanks for helping.
I solved by changing RecyclerView to BaseAdapter and the parameter to ArrayList. I guess RecyclerView can work same with the Basedapter by changing the parameter private val firebaseVisionlabel: ArrayList<FirebaseVisionLabel> to private val labeltext : ArrayList<String> I think it is a bug between FirebaseVisionLabel and Kotlin
Modified part for MainActivity :
for (label in labels) {
for(i in 1..1){
val text = label.label
val entityId = label.entityId
val confidence = label.confidence
new_list.add(text)
}
list_view.adapter =MainAdapter(this,new_list)
Related
I have one RecyclerView, and if I click one item of it, I want make Data of RecyclerView change.
companion object {
var regionData: MutableLiveData<List<String>> = MutableLiveData()
var smallRegionScreen : Boolean = false
}
So I use MutableLiveData to make Data mutable and keep being observed.
adapter = regionData.value?.let { RegionAdapter(this, it, smallRegionScreen) }!!
I pass regionData.value as Data of Adapter, whose type will be List. And smallRegionScreen is Boolean value.
Since first click of item and second click of item in RecyclerView's taken action will be different, so I differentiate it by this value.
regionDB.get()
.addOnSuccessListener { documents ->
for (document in documents) {
var newArray = ArrayList<String>()
Log.d("리지온1", "$document")
for ((k, v) in document.data) {
regionData.value.add(v.String)
Log.d("리지온", "${regionData.value}")
}
}
adapter.notifyDataSetChanged()
}
binding.regionRecycler.adapter=adapter
binding.regionRecycler.layoutManager= LinearLayoutManager(this)
}
As here, I add item to regionData.value.
But it shows empty Array.
What is problem here?
And My Adapter is below, my process is okay?
class RegionAdapter(private var context: Context, private var regionData: List<String>, private var smallRegionScreen: Boolean): RecyclerView.Adapter<RegionAdapter.RegionViewHolder>() {
var userDB = Firebase.firestore.collection("users")
var userId = Firebase.auth.currentUser?.uid
companion object {
var REGION_RECYCLER_CLICKED = "com.chungchunon.chunchunon_android.REGION_RECYCLER_CLICKED"
}
inner class RegionViewHolder(ItemView: View) : RecyclerView.ViewHolder(ItemView) {
val regionView: TextView = itemView.findViewById(R.id.regionSelectText)
fun bind (position: Int) {
regionView.text = regionData[position]
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RegionViewHolder {
val view = LayoutInflater.from(parent.context)
.inflate(R.layout.item_region, parent, false)
return RegionViewHolder(view)
}
override fun onBindViewHolder(holder: RegionViewHolder, position: Int) {
holder.bind(position)
holder.itemView.setOnClickListener { view ->
if(!smallRegionScreen) {
var selectedRegion = regionData[position]
var regionSet = hashMapOf(
"region" to selectedRegion
)
userDB.document("$userId").set(regionSet)
var regionDB = Firebase.firestore.collection("region")
regionDB
.document("4ggk4cR82mz46CjrLg60")
.collection(selectedRegion.toString())
.get()
.addOnSuccessListener { documents ->
for (document in documents) {
for ((k, v) in document.data) {
regionData.plus(v.toString())
}
}
smallRegionScreen = true
}
} else {
var selectedSmallRegion = regionData[position]
var regionSet = hashMapOf(
"smallRegion" to selectedSmallRegion
)
userDB.document("$userId").set(regionSet)
}
}
}
override fun getItemCount(): Int {
return regionData.size
}
}
If you want to add data to your MutableLiveData:
val regionDataList = regionData.value
val templateList = mutableListOf<String>()
regionDataList?.forEach { data ->
templateList.add(data)
}
templateList.add(v.String)
regionData.value = templateList
you can add data in the list like this :-
regionData.value.add(v.toString())
I have two activity and each activity has recyclerview, I have nested json.I want when user tap first activity recyclerview then they goes to next activity and show the recyclerview.Better understanding please follow the json link and code.
Json Link
: https://run.mocky.io/v3/8c3f6be2-a53f-47da-838c-72e603af844d
CropData.kt
data class CropData(
#SerializedName("cropImage")
val cropImage: String,
#SerializedName("cropName")
val cropName: String,
#SerializedName("cropTime")
val cropTime: String,
#SerializedName("cropDetails")
val cropDetails: String,
#SerializedName("cropProcess")
val cropProcess: String,
#SerializedName("cropType")
val cropType: String,
#SerializedName("cropFertilizer")
val cropFertilizer: List<CropFertilizer>
)
CropFertilizer.kt
data class CropFertilizer(
#SerializedName("fertilizerName")
val fertilizerName: String,
#SerializedName("fertilizerFirst")
val fertilizerFirst: String,
#SerializedName("fertilizerSecond")
val fertilizerSecond: String,
#SerializedName("fertilizerThird")
val fertilizerThird: String
)
CropActivity.kt
class CropActivity : AppCompatActivity(), CropOnItemClickListener {
private lateinit var viewModel: CropActivityViewModel
private val cropAdapter by lazy { CropAdapter(this) }
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_crop)
val repository = Repository()
val viewModelFactory = CropActivityViewModelFactory(repository)
viewModel = ViewModelProvider(this, viewModelFactory).get(CropActivityViewModel::class.java)
viewModel.getCropData()
viewModel.cropResponse.observe(this, Observer { response ->
cropAdapter.setData(response)
Log.d("dCrop", response.toString())
})
setUpCrops()
}
private fun setUpCrops() {
crop_recyclerview.layoutManager = LinearLayoutManager(
this,
LinearLayoutManager.VERTICAL, false
)
crop_recyclerview.setHasFixedSize(true)
crop_recyclerview.adapter = cropAdapter
}
override fun onClick(item: CropData, position: Int) {
val intent = Intent(this, CropDetailsActivity::class.java)
intent.putExtra("name", item.cropName)
intent.putExtra("image", item.cropImage)
intent.putExtra("intro", item.cropDetails)
intent.putExtra("process", item.cropProcess)
intent.putExtra("type", item.cropType)
intent.putExtra("time", item.cropTime)
startActivity(intent)
}
}
CropAdapter.kt
class CropAdapter(private val cropOnItemClickListener: CropOnItemClickListener) :
RecyclerView.Adapter<CropAdapter.ViewHolder>() {
private var cropList = emptyList<CropData>()
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view = LayoutInflater.from(parent.context).inflate(R.layout.crop_row,parent,false)
return ViewHolder(view)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.itemView.crop_name.text = cropList[position].cropName
holder.itemView.crop_details.text = cropList[position].cropDetails
holder.itemView.crop_time.text = cropList[position].cropTime
holder.itemView.setOnClickListener{
cropOnItemClickListener.onClick(cropList[position],position)
}
}
override fun getItemCount(): Int {
return cropList.size
}
fun setData(newList: List<CropData>){
notifyDataSetChanged()
cropList = newList
notifyDataSetChanged()
}
class ViewHolder(itemView: View): RecyclerView.ViewHolder(itemView)
}
CropDetailsActivity.kt
class CropDetailsActivity : AppCompatActivity() {
private lateinit var viewModel: CropDetailsActivityViewModel
private val fertlizerAdapter by lazy { FertilizerAdapter() }
private val cropFertilizerAdapter by lazy { FertilizerAdapter() }
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_crop_details)
val bundle:Bundle? = intent.extras
crop_details_name.text = bundle!!.getString("name")
val i: String = bundle!!.getString("intro")
crop_details_intro.text = i
Glide.with(this).load(bundle.getString("image")).into(crop_details_image);
val j: String = bundle!!.getString("process")
crop_details_process.text = j
crop_details_time.text = bundle!!.getString("time")
crop_details_type.text = bundle!!.getString("type")
val repository = Repository()
val viewModelFactory = CropDetailsActivityViewModelFactory(repository)
viewModel = ViewModelProvider(this, viewModelFactory).get(CropDetailsActivityViewModel::class.java)
viewModel.getFertilizer()
viewModel.fResponse.observe(this, Observer {
cropFertilizerAdapter.setData(it)
})
crop_details_recyclerview.layoutManager = LinearLayoutManager(
this,
LinearLayoutManager.VERTICAL, false
)
crop_details_recyclerview.setHasFixedSize(true)
crop_details_recyclerview.adapter = cropFertilizerAdapter
}
}
Better understanding see the image
[1]: https://i.stack.imgur.com/BtPqe.jpg
I want to show CropFertilizer list in CropDetailsActivity.How can i do this?
I just want to say sorry to my English skill
I've studied the Android Studio and Kotlin these days.
but I'd got a problem on RecyclerViewer and Adapter, for Intent method
work flow chart
this image, this is what i want to do
so i coded the three classes
ShoppingAppActivity.kt, MyAdapter.kt, CartActivity.kt
At ShoppingAppActivity, If I click the itemId ( in the Red box texts)
I make it move to other context(CartActivity)
ShoppingAppActivity working
if i clicked the red box then
cartStatus
go to cart Activity
it worked but already I said, I just want to send only send itemID
covert to String (i will use toString())
SO i tried to use Intent method in ShoppingAppActivity.kt
///PROBLEM PART
adapter?.setOnItemClickListener{
val nextIntent = Intent(this, CartActivity::class.java)
//nextIntent.putExtra("itemID", )
startActivity(nextIntent)
}
///PROBLEM PART
like this but the problem is I don't know what am i have to put the parameter in
nextIntent.putExtra("itemID", )
what should i do?
I think, I should fix MyAdaptor.kt or ShopingAppActivity.kt for this problem.
But in my knowledge, this is my limit. :-(
below
Full Codes of ShoppingAppActivity.kt, MyAdapter.kt, CartActivity.kt
ShoppingAppActivity.kt
class ShoppingAppActivity : AppCompatActivity() {
lateinit var binding: ActivityShoppingAppBinding
private var adapter: MyAdapter? = null
private val db : FirebaseFirestore = Firebase.firestore
private val itemsCollectionRef = db.collection("items")
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityShoppingAppBinding.inflate(layoutInflater)
setContentView(binding.root)
updateList()
binding.recyclerViewItems.layoutManager = LinearLayoutManager(this)
adapter = MyAdapter(this, emptyList())
binding.recyclerViewItems.adapter = adapter
///PROBLEM PART
adapter?.setOnItemClickListener{
val nextIntent = Intent(this, CartActivity::class.java)
//nextIntent.putExtra("itemID", )
startActivity(nextIntent)
}
///PROBLEM PART
}
private fun updateList() {
itemsCollectionRef.get().addOnSuccessListener {
val items = mutableListOf<Item>()
for (doc in it) {
items.add(Item(doc))
}
adapter?.updateList(items)
}
}
}
MyAdapter.kt
data class Item(val id: String, val name: String, val price: Int, val cart: Boolean) {
constructor(doc: QueryDocumentSnapshot) :
this(doc.id, doc["name"].toString(), doc["price"].toString().toIntOrNull() ?: 0, doc["cart"].toString().toBoolean() ?: false)
constructor(key: String, map: Map<*, *>) :
this(key, map["name"].toString(), map["price"].toString().toIntOrNull() ?: 0, map["cart"].toString().toBoolean() ?: false)
}
class MyViewHolder(val binding: ItemBinding) : RecyclerView.ViewHolder(binding.root)
class MyAdapter(private val context: Context, private var items: List<Item>)
: RecyclerView.Adapter<MyViewHolder>() {
fun interface OnItemClickListener {
fun onItemClick(student_id: String)
}
private var itemClickListener: OnItemClickListener? = null
fun setOnItemClickListener(listener: OnItemClickListener) {
itemClickListener = listener
}
fun updateList(newList: List<Item>) {
items = newList
notifyDataSetChanged()
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
val inflater = LayoutInflater.from(parent.context)
val binding: ItemBinding = ItemBinding.inflate(inflater, parent, false)
return MyViewHolder(binding)
}
override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
val item = items[position]
val itemID : String
holder.binding.textID.text = item.id
holder.binding.textName.text = item.name
if(item.cart)
{
holder.binding.textCart.text = "in Cart"
}
else
{
holder.binding.textCart.text = ""
}
holder.binding.textID.setOnClickListener {
AlertDialog.Builder(context).setMessage("You clicked ${item.id}.").show()
itemClickListener?.onItemClick(item.id)
}
holder.binding.textName.setOnClickListener {
//AlertDialog.Builder(context).setMessage("You clicked ${student.name}.").show()
itemClickListener?.onItemClick(item.id)
}
//return item.id.toString()
}
override fun getItemCount() = items.size
}
CartActivity.kt
class CartActivity : AppCompatActivity() {
lateinit var binding: ActivityCartBinding
private val db: FirebaseFirestore = Firebase.firestore
private val itemsCollectionRef = db.collection("items")
private var adapter: MyAdapter? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityCartBinding.inflate(layoutInflater)
setContentView(binding.root)
updateList()
//binding.recyclerViewItems.layoutManager = LinearLayoutManager(this)
//adapter = MyAdapter(this, emptyList())
//binding.recyclerViewItems.adapter = adapter
binding.changeCartStatus.setOnClickListener{
//change the button's text if the itemID is corrected
//if(){
// binding.changeCartStatus.text = ""
//}
}
}
private fun updateList() {
itemsCollectionRef.get().addOnSuccessListener {
val items = mutableListOf<Item>()
for (doc in it) {
items.add(Item(doc))
}
adapter?.updateList(items)
}
}
}
You just need to implement listener to your activity
class ShoppingAppActivity : AppCompatActivity() ,MyAdapter.OnItemClickListener {
In oncreate add below line after adapter
adapter?.setOnItemClickListener(this)
Then override its method
override fun onItemClick(id: String){
val nextIntent = Intent(this, CartActivity::class.java)
nextIntent.putExtra("itemID",id )
startActivity(nextIntent)
}
I'm trying to make my Android App (I'm only experienced in iOS).
I created a RecyclerView that gets the data from a web. I tried everything to implement endless scrolling to load more items, but when I call the function to get the items, the entire RecyclerView loads again and no attach the new results on the bottom.
This is my code:
ConversationUser.kt
data class ConversationUser(
val message_nickname: String,
val message_image_thumb: String,
val message_large_thumb: String,
val message_modified: String,
val message_status: String,
val message_unread: Int,
val conv_id: String,
val message_dest: String) {
}
ConversacionesActivity.kt
class ConversacionesActivity : AppCompatActivity() {
// MARK: Variables
var user_token = ""
var user_id = ""
override fun onCreate(savedInstanceState: Bundle?) {
// User Defaults
val sharedPreferences = getSharedPreferences("Preferences", Context.MODE_PRIVATE)
user_token = sharedPreferences.getString("user_token", "")!!
user_id = sharedPreferences.getString("user_id", "")!!
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_conversaciones)
recyclerConv.addItemDecoration(DividerItemDecoration(this, LinearLayoutManager.VERTICAL))
getConversationsData()
recyclerConv.setLoadingListener(object : LoadingListener {
override fun onRefresh() {
//refresh data here
}
override fun onLoadMore() {
// load more data here
getConversationsData()
}
})
}
fun getConversationsData() {
val httpAsync = "https://mywebsite.com/conversations/${user_token}"
.httpPost()
.responseString { request, response, result ->
when (result) {
is Result.Failure -> {
val ex = result.getException()
println(ex)
}
is Result.Success -> {
val data = result.get()
runOnUiThread {
val conversaciones = processJson(data)
show(conversaciones)
return#runOnUiThread
}
}
}
}
httpAsync.join()
}
fun processJson(json: String): List<ConversationUser> {
val gson: Gson = GsonBuilder().create()
val conversaciones: List<ConversationUser> = gson.fromJson(
json,
Array<ConversationUser>::class.java
).toList()
return conversaciones
}
fun show(conversaciones: List<ConversationUser>) {
recyclerConv.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
recyclerConv.adapter = AdaptadorConv(conversaciones, this, user_token, user_id)
}
AdaptadorConv.kt
class AdaptadorConv(
val conversaciones: List<ConversationUser> = ArrayList(),
val context: Context,
val user_token: String,
val user_id: String) : RecyclerView.Adapter<AdaptadorConv.ConvViewHolder>() {
override fun onBindViewHolder(holder: ConvViewHolder, position: Int) {
holder.convName.text = conversaciones[position].message_nickname
holder.convTime.text = conversaciones[position].message_modified
}
override fun getItemCount(): Int {
return conversaciones.size - 1
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ConvViewHolder {
val view: View = LayoutInflater.from(parent.context).inflate(
R.layout.conversaciones,
parent,
false
)
return ConvViewHolder(view)
}
class ConvViewHolder(vista: View): RecyclerView.ViewHolder(vista) {
val convImg: ImageView = itemView.findViewById(R.id.convImg)
val convStatus: ImageView = itemView.findViewById(R.id.convStatus)
val convName: TextView = itemView.findViewById(R.id.convName)
val convUnread: TextView = itemView.findViewById(R.id.convUnread)
val convTime: TextView = itemView.findViewById(R.id.convTime)
}
Thanks for any help or hint.
Please check your show () method, you are creating new Adapter every time with the new dataset. You have to append the new items to the adapter's list and adapter should be set to list once. Helpful tutorial can be found at here.
Let me get straight to the point here the error in the logcat is:
Could not complete scheduled request to refresh entries. ClientErrorCode: 3
I have tested the Realm() part of the code and it fetched the right data. Basically, the app just crashes when it loads that Activity. All Im trying to do right now is post the itemName in each cell. If you guys need the logcat, just say so and I'll post it. Any other details needed too.
This is the code for my Activity with a recyclerView with just an ImageView and a TextView in each cell.:
class EssentialsActivity : AppCompatActivity() {
var category: String? = null
val realmtypeFunctions = RealmTypeFunctions()
var realmResults: RealmResults<ChattRItem>? = null
var chattRItemList = mutableListOf<ChattRItem>()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_essentials)
//init realm
Realm.init(this)
category = "People"
recyclerView_Essentials.setBackgroundColor(Color.CYAN)
recyclerView_Essentials.layoutManager = GridLayoutManager(this, 3)
// AsyncTask.execute {
category?.let {
loadFromRealm(it)
}
// }
this.runOnUiThread {
recyclerView_Essentials.adapter = EssentialsAdapter(chattRItemList)
}
}
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
val inflater = menuInflater
inflater.inflate(R.menu.categories, menu )
return super.onCreateOptionsMenu(menu)
}
override fun onOptionsItemSelected(item: MenuItem?): Boolean {
val intent: Intent?
intent = Intent(this, AddItemActivity::class.java)
intent.putExtra("category", category)
startActivity(intent)
// when (item?.itemId) {
// R.id.essentials_menu_item -> {
// intent = Intent(this, EssentialsActivity::class.java)
// startActivity(intent)
// }
// R.id.addItem_menu_item -> {
// intent = Intent(this, AddItemActivity::class.java)
// startActivity(intent)
// }
// else -> return false
// }
return super.onOptionsItemSelected(item)
}
private fun loadFromRealm(category: String){
val realm = Realm.getDefaultInstance()
try {
val query: RealmQuery<ChattRItem>? = realm.where(ChattRItem::class.java).equalTo("itemCategory", category)
val result: RealmResults<ChattRItem>? = query?.findAll()
result?.let {
for (i in it) {
println(i.itemName)
chattRItemList.add(i)
}
println(chattRItemList.count())
}
} finally {
realm.close()
}
}
}
class EssentialsAdapter(private val chattRItemList: List<ChattRItem>): RecyclerView.Adapter<CustomViewHolder>(){
//realm class variable here to be displayed
/* var essentials = array of realm essential item */
// var essentialsActivity = EssentialsActivity()
//number of items
override fun getItemCount(): Int {
// return 12 //return realm items count
return this.chattRItemList.size
}
override fun onBindViewHolder(holder: CustomViewHolder, position: Int) {
// holder.itemView.textView_essentials_name.text = "Essentials Item"
val chattRItem = chattRItemList.get(position)
// holder.itemView.textView_essentials_name.text = chattRItem.itemName
holder.bind(chattRItem)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CustomViewHolder{
// how do we create a cell view
val layoutInflater = LayoutInflater.from(parent.context)
val cellForRow = layoutInflater.inflate(R.layout.essentials_cells_layout, parent, false)
return CustomViewHolder(view = cellForRow)
}
}
class CustomViewHolder(view: View): RecyclerView.ViewHolder(view) {
fun bind(chattRitem: ChattRItem) {
itemView.textView_essentials_name.text = chattRitem.itemName
}
}
So basically I figured it out. This was not the right error from LogCat. There was another set of errors from Logcat many lines above this. The error was the result list was a #Realm object. My recyclerView was asking for a non RealmClass object. So i had to make a similar object except not a RealmClass.
#RealmClass
open class ChattRItem: RealmModel {
#PrimaryKey var itemId: String = ""
var itemName: String = ""
var itemCategory: String = ""
var itemImageFileName: String = ""
var itemAudioFileName: String = ""
}
class ChattRBoxItems(val itemId: String, val itemName: String, val itemCategory: String, val itemImageFileName: String, val itemAudioFileName: String)
then I mapped the result into this new class then applied it to my recyclerView.