Develop Reference

Recycler View with duplicate rows after refreshing activity

After doing some research i found out that i need to clear the list that i am using each time i refresh the activity, after trying it to refresh the list at different places, the result remains the same and i have decided to give my brain a break and ask for help. The refreshing takes place on the PostDialogFragment class
i have circled the recycler view causing the issue
PostAdapter
package com.example.osrscritic.view
import android.text.method.ScrollingMovementMethod
import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView
import com.example.osrscritic.databinding.PostRowItemBinding
import com.example.osrscritic.model.Skillvalue
import com.google.firebase.firestore.CollectionReference
import com.google.firebase.firestore.DocumentSnapshot
import com.google.firebase.firestore.QueryDocumentSnapshot
import com.google.firebase.firestore.QuerySnapshot
class PostsAdapter: RecyclerView.Adapter<PostsViewHolder>() {
val postsMutableList : MutableList<DocumentSnapshot> = mutableListOf()
fun setPostsList(statsList: List<DocumentSnapshot>) {
postsMutableList.addAll(statsList)
notifyDataSetChanged()
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PostsViewHolder {
val binding = PostRowItemBinding.inflate(LayoutInflater.from(parent.context)
,parent,false)
return PostsViewHolder(binding)
}
override fun onBindViewHolder(holder: PostsViewHolder, position: Int) {
val post = postsMutableList[position]
holder.binding.tvCritic.text = post["critic"].toString()
val posts = post["posts"] as List<String>
var count = 0;
holder.binding.tvActualPost.movementMethod = ScrollingMovementMethod()
for(p in posts) {
holder.binding.tvActualPost.append("${count}: " + p + "\n")
count++
}
}
override fun getItemCount() = postsMutableList.size
}
class PostsViewHolder(val binding: PostRowItemBinding) : RecyclerView.ViewHolder(binding.root)
DisplayUserActivty
package com.example.osrscritic
import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.Toast
import androidx.recyclerview.widget.LinearLayoutManager
import com.example.osrscritic.databinding.ActivityDisplayUserBinding
import com.example.osrscritic.view.PostDialogFragment
import com.example.osrscritic.view.PostsAdapter
import com.example.osrscritic.view.StatsAdapter
import com.example.osrscritic.viewmodel.DisplayUserViewModel
import com.google.android.gms.tasks.OnCompleteListener
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.firestore.DocumentSnapshot
import org.koin.androidx.viewmodel.ext.android.viewModel
class DisplayUserActivity : AppCompatActivity() {
private val displayUserViewModel : DisplayUserViewModel by viewModel()
lateinit var binding: ActivityDisplayUserBinding
val statsAdapter = StatsAdapter()
val postsAdapter = PostsAdapter()
lateinit var critiquing: String
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val extras = intent.extras
critiquing = extras?.getString("c")!!
binding = ActivityDisplayUserBinding.inflate(layoutInflater)
setContentView(binding.root)
binding.rsStatsRv.adapter = statsAdapter
binding.rsStatsRv.layoutManager = LinearLayoutManager(this,
LinearLayoutManager.VERTICAL, false)
binding.rvPosts.adapter = postsAdapter
binding.rvPosts.layoutManager = LinearLayoutManager(this,
LinearLayoutManager.VERTICAL, false)
configureObservers()
displayUserViewModel.getFirebaseRef()
displayUserViewModel.getOSRSPlayer()
binding.ivWritePost.setOnClickListener {
PostDialogFragment.newInstance(critiquing).show(supportFragmentManager
, PostDialogFragment.KEY)
}
}
private fun configureObservers() {
displayUserViewModel.displayUserLiveData.observe(this, {
statsAdapter.setStatsList(it.skillvalues)
binding.tvRunescapeName.text = String.format("Account Name: %s", it.name)
binding.tvCombat.text = String.format("Combat Level: %s", it.combatlevel.toString())
})
displayUserViewModel.loadingState.observe(this, {
when(it){
true -> binding.pgBar.visibility = View.VISIBLE
false -> binding.pgBar.visibility = View.GONE
}
})
displayUserViewModel.errorData.observe(this, {
Toast.makeText(this, it, Toast.LENGTH_LONG).show()
})
displayUserViewModel.displayUserPostsLiveData.observe(this, {
postsAdapter.postsMutableList.clear()
it.document(critiquing).collection("posts").get()
.addOnSuccessListener {
postsAdapter.setPostsList(it.documents)
}
})
}
}
PostDialogFragment
package com.example.osrscritic.view
import android.app.AlertDialog
import android.app.Dialog
import android.content.DialogInterface
import android.content.Intent
import android.os.Bundle
import android.text.Editable
import android.text.TextWatcher
import android.util.Log
import androidx.fragment.app.DialogFragment
import android.widget.LinearLayout
import android.widget.TextView
import android.widget.EditText
import android.view.Gravity
import androidx.core.app.ActivityCompat.recreate
import com.example.osrscritic.DisplayUserActivity
import com.example.osrscritic.viewmodel.DisplayUserViewModel
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.firestore.FieldPath
import com.google.firebase.firestore.FieldValue
import com.google.firebase.firestore.SetOptions
import org.koin.androidx.viewmodel.ext.android.viewModel
class PostDialogFragment: DialogFragment() {
private val displayUserViewModel : DisplayUserViewModel by viewModel()
val currentUser = FirebaseAuth.getInstance().currentUser
lateinit var critiquing: String
val postsAdapter = PostsAdapter()
companion object {
const val KEY: String = "KEY2"
//lateinit var param: String
fun newInstance(text: String): PostDialogFragment {
val args = Bundle()
val postDialogFragment = PostDialogFragment()
args.putString(KEY, text)
postDialogFragment.arguments = args
return postDialogFragment
}
}
override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
critiquing = arguments?.getString(KEY)!!
Log.d("*******8", critiquing)
val builder = AlertDialog.Builder(activity)
val layout = LinearLayout(activity)
val parms = LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
)
layout.orientation = LinearLayout.VERTICAL
layout.layoutParams = parms
layout.gravity = Gravity.CLIP_VERTICAL
layout.setPadding(2, 2, 2, 2)
val tv = TextView(activity)
tv.text = "Text View title"
tv.setPadding(40, 40, 40, 40)
tv.gravity = Gravity.CENTER
tv.textSize = 20f
val et = EditText(activity)
var etString = ""
et.addTextChangedListener(object: TextWatcher{
override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {
}
override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {
}
override fun afterTextChanged(p0: Editable?) {
Log.d("etText", et.text.toString())
etString = et.text.toString()
}
})
val tv1 = TextView(activity)
tv1.text = "Input Student ID"
val tv1Params = LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
)
tv1Params.bottomMargin = 5
//layout.addView(tv1, tv1Params)
layout.addView(
et,
LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
)
)
//param = arguments?.getString(KEY)!!
builder.setTitle("New Post")
builder.setView(layout).setPositiveButton("Done", object: DialogInterface.OnClickListener{
override fun onClick(p0: DialogInterface?, p1: Int) {
activity?.let {
displayUserViewModel.displayUserPostsLiveData.observe(it, {
val post : MutableMap<String, Any> = mutableMapOf()
val posts : MutableList<String> = mutableListOf()
posts.add(etString)
post["critic"] = currentUser?.email!!
post["posts"] = posts
if(it.document(critiquing).collection("posts").document().equals(null)) {
it.document(critiquing).collection("posts")
.document(currentUser?.email!!).set(post)
}
it.document(critiquing).collection("posts")
.document(currentUser?.email!!).update("posts", FieldValue.arrayUnion(etString))
})
}
activity!!.finish()
activity!!.overridePendingTransition( 0, 0);
startActivity(activity!!.intent)
//trying to clear the list here once being refreshed
postsAdapter.postsMutableList.clear()
activity!!.overridePendingTransition( 0, 0);
}
})
builder.setNegativeButton("Cancel", object:DialogInterface.OnClickListener{
override fun onClick(p0: DialogInterface?, p1: Int) {
dismiss()
}
})
return builder.create()
}
}

Overriding those usually solves this kind of issues:
getItemId: return long that uniquely identifies every item. For example, you could use an autoincrementing variable id for each new item object, or some hashcode. This should be paired with setHasStableIds(true). (By default it returns RecyclerView.NO_ID which value is -1).
This helps to make sure RecyclerView e.g. identifies items properly, knows when OnBindViewHolder must be called or to return precise values on getAdapterPosition().
getItemCount: return an int with current number of items. Usually the Array.size() where the data is. (By default it returns 0).
getItemType: If there's multiple view types, return a unique number for each type of ViewHolder (usually starting with 0). (By default it returns 0).

Why is my RecycleView not working as expected

I am having an exam and this code won't work for me.
My RecycleView won't work and I don't know how to save the deposit amount and minus the withdrow from the amount that already giving. This is the mainAcitvity file and RvAdapter file:
MainActivity.kt
package com.example.anhar
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import android.widget.TextView
import androidx.constraintlayout.widget.ConstraintLayout
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
class MainActivity : AppCompatActivity() {
private lateinit var clRoot: ConstraintLayout
private lateinit var bignum: TextView
private lateinit var cash: ArrayList<String>
private lateinit var rvMoney: RecyclerView
private lateinit var diposte: EditText
private lateinit var dipbtn: Button
private lateinit var withdrow: EditText
private lateinit var withbtn: Button
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
clRoot = findViewById(R.id.clRoot)
cash = ArrayList()
rvMoney = findViewById<RecyclerView>(R.id.rvMoney)
bignum = findViewById(R.id.amount)
rvMoney.adapter = RvAdapter(this)
rvMoney.layoutManager = LinearLayoutManager(this)
diposte = findViewById(R.id.dip)
dipbtn = findViewById(R.id.dipbtn)
withdrow = findViewById(R.id.with)
withbtn = findViewById(R.id.withbtn)
diposte.setOnClickListener { adddipMessage() }
withdrow.setOnClickListener { addwidMessage() }
private fun addwidMessage() {
val w = withdrow.text
if (w.isNotEmpty())
bignum.text = " - ${withdrow.text}"
withdrow.text.clear()
withdrow.clearFocus()
}
private fun adddipMessage() {
val d = diposte.text
if (d.isNotEmpty())
bignum.text = " + ${diposte.text}"
diposte.text.clear()
diposte.clearFocus()
}
}
This is for the RecycleView and I don't know why it is not working.
RvAdapter.kt
package com.example.anhar
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.rvmain.view.*
class RvAdapter(private val money: ArrayList<String>): RecyclerView.Adapter<RvAdapter.ItemViewHolder>() {
class ItemViewHolder(itemView: View): RecyclerView.ViewHolder(itemView)
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ItemViewHolder {
return ItemViewHolder(
LayoutInflater.from(parent.context).inflate(
R.layout.rvmain,
parent,
false
)
)
}
override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
val moneys = money[position]
holder.itemView.apply {
rvMoney.text = moneys
}
}
override fun getItemCount() = money.size
}

rvMoney.adapter = RvAdapter(this) // wrong way to pass list
You must pass your list here.
Change constructor invocation like that
rvMoney.adapter = RvAdapter(listOf("Money1", "Money2"))

RecyclerView: No adapter attached; skipping layout - kotlin

I know this problem has been posted but all seemed to be posted in java code. I'm just trying to implement a small example recyclerView. Not sure what I'm doing incorrect, any insight would be great, TIA.
MainActivity.kt
package com.wildcardev.androidtest1
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import androidx.recyclerview.widget.LinearLayoutManager
import com.wildcardev.androidtest1.adapters.RecyclerAdapter
import com.wildcardev.androidtest1.databinding.ActivityMainBinding
import com.wildcardev.androidtest1.models.TestDataObj
fun addDataToList(arrayList:ArrayList<TestDataObj>): ArrayList<TestDataObj>{
arrayList.add(TestDataObj("tes1", "test2", "test3"))
arrayList.add(TestDataObj("test2", "testt2", "testt2"))
arrayList.add(TestDataObj("tes12", "test22", "test32"))
arrayList.add(TestDataObj("tes13", "test23", "test33"))
arrayList.add(TestDataObj("tes14", "test24", "test34"))
arrayList.add(TestDataObj("tes15", "test25", "test35"))
return arrayList
}
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
val testList: ArrayList<TestDataObj> = ArrayList()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(R.layout.activity_main)
val list = addDataToList(testList)
Log.d("TEST1","$list")
Log.d("TEST1","${binding.recyclerView}")
binding.recyclerView.layoutManager = LinearLayoutManager(this#MainActivity)
val adapter = RecyclerAdapter(list)
binding.recyclerView.adapter = adapter
}
}
TestDataObj.kt
package com.wildcardev.androidtest1.models
data class TestDataObj(
val title: String,
val description: String,
val date: String
)
RecyclerAdapter.kt
package com.wildcardev.androidtest1.adapters
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import com.wildcardev.androidtest1.R
import com.wildcardev.androidtest1.models.TestDataObj
class RecyclerViewHolder(view: View): RecyclerView.ViewHolder(view){
var title: TextView = view.findViewById(R.id.title)
var description: TextView = view.findViewById(R.id.description)
var date: TextView = view.findViewById(R.id.date)
}
class RecyclerAdapter(private var list: ArrayList<TestDataObj>): RecyclerView.Adapter<RecyclerViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerViewHolder {
Log.d("onCreateView", "INHOLDERcreate")
val view = LayoutInflater.from(parent.context).inflate(R.layout.activity_main, parent, false)
return RecyclerViewHolder(view)
}
override fun onBindViewHolder(holder: RecyclerViewHolder, position: Int) {
Log.d("ADAPTER", "INBINDfunc")
val item = list[position]
holder.title.text = item.title
holder.description.text = item.description
holder.date.text = item.date
}
override fun getItemCount(): Int {
Log.d("COUNT",".getItemCountcalled")
return list.size
}
}

Try
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)

I fixed my issue. When using viewBinding/dataBinding, you need to pass dataBinding to the viewHolder. Unfortunately I did not get this as I was just following tutorials that are using synthetic imports. So I changed my Adapter code to the following
RecyclerAdapter.kt
package com.wildcardev.androidtest1.adapters
import android.util.Log
import android.view.LayoutInflater
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import com.wildcardev.androidtest1.models.TestDataObj
import com.wildcardev.androidtest1.databinding.ListItemBinding
class RecyclerViewHolder(viewDataBinding: ListItemBinding): RecyclerView.ViewHolder(viewDataBinding.root){
var title: TextView? = viewDataBinding.title
var description: TextView? = viewDataBinding.description
var date: TextView? = viewDataBinding.date
}
class RecyclerAdapter(private var list: ArrayList<TestDataObj>): RecyclerView.Adapter<RecyclerViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerViewHolder {
Log.d("onCreateView", "INHOLDERcreate")
val binding = ListItemBinding.inflate(LayoutInflater.from(parent.context),parent,false)
return RecyclerViewHolder(binding)
}
override fun onBindViewHolder(holder: RecyclerViewHolder, position: Int) {
Log.d("ADAPTER", "INBINDfunc $holder")
val item = list[position]
holder.title?.text = item.title
holder.description?.text = item.description
holder.date?.text = item.date
}
override fun getItemCount(): Int {
Log.d("COUNT",".getItemCountcalled ${list.size}")
return list.size
}
}

intent.putExtra: None of the following functions can be called with the arguments supplied

I'm trying to pass data from one activity to another through an intent with putExtra. The thing is, I get the error that says: None of the following functions can be called with the arguments supplied.
I'm not sure why it's not working, since the variable that I'm referencing is in the viewholder. Any clue as to what's going on and how to fix it would help a lot.
This is my recycler adapter:
package com.example.newsapp
import android.content.Intent
import android.icu.text.CaseMap
import android.net.Uri
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.AdapterView
import android.widget.ImageView
import android.widget.TextView
import androidx.core.content.ContextCompat.startActivity
import androidx.recyclerview.widget.RecyclerView
import com.example.newsapp.databinding.NewsItemBinding
import com.squareup.picasso.Picasso
class RecyclerAdapter (
private var Titles: List<String>,
private var Images: List<String>,
private var Authors: List<String>,
private var Descriptions: List<String>
) : RecyclerView.Adapter<RecyclerAdapter.ViewHolder>(){
inner class ViewHolder(
view: View
): RecyclerView.ViewHolder(view){
private val binding = NewsItemBinding.bind(view)
val itemTitle: TextView = binding.tvTitle
val itemImage: ImageView = binding.ivNewsImage
fun bind(urlToImage:String){
Picasso.get().load(urlToImage).into(binding.ivNewsImage)
}
init {
itemImage.setOnClickListener{
val intent = Intent(view.context, PostActivity::class.java)
intent.putExtra("title",itemTitle)
view.context.startActivity(intent)
}
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val v = LayoutInflater.from(parent.context).inflate(R.layout.news_item, parent, false)
return ViewHolder(v)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.itemTitle.text = Titles[position]
val itemImage = Images[position]
holder.bind(itemImage)
}
override fun getItemCount(): Int {
return Titles.size
}
}
The part with the issue is this one:
init {
itemImage.setOnClickListener{
val intent = Intent(view.context, PostActivity::class.java)
intent.putExtra("title",itemTitle) view.context.startActivity(intent)
}
}
This is my main activity:
package com.example.newsapp
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import androidx.recyclerview.widget.LinearLayoutManager
import com.example.newsapp.databinding.ActivityMainBinding
import kotlinx.coroutines.*
import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory
import java.lang.Exception
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
private lateinit var adapter: RecyclerAdapter
private val newsTitles = mutableListOf<String>()
private val newsImages = mutableListOf<String>()
private val newsAuthors = mutableListOf<String>()
private val newsDescriptions = mutableListOf<String>()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
makeAPIRequest()
}
private fun initRecyclerView() {
adapter = RecyclerAdapter( newsTitles, newsImages)
binding.rvNews.layoutManager = LinearLayoutManager(this)
binding.rvNews.adapter = adapter
}
private fun addToList(title:String, image:String, author:String, description:String){
newsTitles.add(title)
newsImages.add(image)
newsAuthors.add(author)
newsDescriptions.add(description)
}
private fun makeAPIRequest() {
val api = Retrofit.Builder()
.baseUrl("https://newsapi.org/")
.addConverterFactory(GsonConverterFactory.create())
.build()
.create(APIService::class.java)
GlobalScope.launch(Dispatchers.IO){
val response = api.getNews()
val posts = response.body()
try{
if (posts != null) {
for(art in posts.Articles){
Log.i("Main Activity", "Result = $art")
addToList(art.Title,art.urlToImage, art.Author, art.Description)
}
}
withContext(Dispatchers.Main){
initRecyclerView()
}
} catch (e:Exception){
Log.e("Main Activity", e.toString())
}
}
}
}

intent.putExtra("title",itemTitle)
Here, itemTitle is a TextView. You cannot pass a TextView between activities. You could switch to:
intent.putExtra("title",itemTitle.text)
...to put the text from the TextView into the extra.
Also, you might want to consider whether these should be separate activities or just two fragments (or composables) in a single activity.

How can I pass data (image) from RecyclerView to a separate Activity in Kotlin?

I'm trying to pass data from a RecyclerView that contains a list of photos to a separate Activity that should show Details about the selected photo.
since im new to Kotlin, i've tried a lot and failed to come up with a solution.. I'd be thankful if anyone has a word on this.
PhotosActivity.kt
package com.example.wallpaperapp
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
class PhotosActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_photos)
val recyclerPhotos = findViewById<RecyclerView>(R.id.rv_photo)
recyclerPhotos.layoutManager = LinearLayoutManager(this)
recyclerPhotos.adapter = PhotosAdapter(getPhotosData(), this)
}
private fun getPhotosData(): List<PhotoModel>{
return listOf(
PhotoModel(R.drawable.photo1),
PhotoModel(R.drawable.photo2),
PhotoModel(R.drawable.photo3),
PhotoModel(R.drawable.photo4),
PhotoModel(R.drawable.photo5),
PhotoModel(R.drawable.photo6),
PhotoModel(R.drawable.photo7),
PhotoModel(R.drawable.photo8)
)
}
}
PhotosModel.kt
package com.example.wallpaperapp
import java.io.Serializable
data class PhotoModel(
val image: Int,
): Serializable
PhotosAdapter.kt
package com.example.wallpaperapp
import android.app.Activity
import android.content.Intent
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import androidx.recyclerview.widget.RecyclerView
class PhotosAdapter(val listOfPhotos: List<PhotoModel>,
val context: Activity): RecyclerView.Adapter<PhotosAdapter.ViewHolder>() {
inner class ViewHolder(view: View): RecyclerView.ViewHolder(view){
val img = view.findViewById<ImageView>(R.id.img_test)
init{
itemView.setOnClickListener {
val intent = Intent(context, PhotoDetailsActivity::class.java)
intent.putExtra("PHOTO", listOfPhotos[adapterPosition])
context.startActivity(intent)
}
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PhotosAdapter.ViewHolder {
val view = LayoutInflater.from(parent.context).inflate(R.layout.item_photo, parent,false)
return ViewHolder(view)
}
override fun getItemCount(): Int {
return listOfPhotos.size
}
override fun onBindViewHolder(holder: PhotosAdapter.ViewHolder, position: Int) {
holder.img.setImageResource(listOfPhotos[position].image)
}
}
PhotoDetailsActivity.kt
package com.example.wallpaperapp
import android.app.WallpaperManager
import android.content.Intent
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.graphics.drawable.BitmapDrawable
import android.os.Bundle
import android.util.Log
import android.view.View
import android.widget.Button
import android.widget.ImageView
import androidx.appcompat.app.AppCompatActivity
import androidx.constraintlayout.widget.ConstraintLayout
import androidx.core.view.ViewCompat.setBackground
class PhotoDetailsActivity : AppCompatActivity() {
lateinit var arrow: ImageView
lateinit var img: ImageView
lateinit var btn_set: Button
lateinit var bitmap: Bitmap
lateinit var manager: WallpaperManager
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_photo_details)
val selectedPhoto = intent.extras?.getSerializable("PHOTO") as PhotoModel
arrow = findViewById(R.id.img_arrow)
arrow.setOnClickListener {
val intent = Intent(this, PhotosActivity::class.java)
startActivity(intent)
}
img = findViewById(R.id.img_detail)
btn_set = findViewById(R.id.btn_wallpaper)
btn_set.setOnClickListener(View.OnClickListener {
fun setOnClickr(l: (View) -> Unit){
setBackgroundd()
}
})
}
fun setBackgroundd() {
val bitmap = BitmapFactory.decodeResource(resources, R.layout.activity_photos)
img.setImageBitmap(bitmap)
manager = WallpaperManager.getInstance(getApplicationContext())
manager.setBitmap(bitmap)
}
}
thanks in advance!