What I want to reach is that the same RecyclerView shows different data depending on which button the App user pressed before in the MainActivity.kt.
In my MainActivity.kt I have two buttons, which both send the user to the same RecyclerView Activity (RecyclerViewLayout.kt) via Intent.
Example: The RecyclerView contains a picture of an apple and a banana. By pressing button A in MainActivity.kt, the RecyclerView in RecyclerViewLayout.kt should only show the apple. By pressing button B it should only show the banana. In my real app there are no fruits. but Tutorials, which should be filtered like described.
I gently ask for help here how to do that. Maybe there is also a better way to reach my target to filter the RecyclerView?
Thanks in Advance!
MainActivity.kt
class MainActivity : AppCompatActivity() {
private var binding:ActivityMainBinding? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding?.root)
val buttonRecyclerView = findViewById<Button>(R.id.btn_recyclerview)
buttonRecyclerView.setOnClickListener {
val intent = Intent(this, RecyclerViewLayout::class.java)
startActivity(intent)
}
}}
RecyclerViewLayout.kt
class RecyclerViewLayout : AppCompatActivity() {
private lateinit var newRecylerview : RecyclerView
private lateinit var newArrayList : ArrayList<RecyclerViewDataClass>
private lateinit var tempArrayList : ArrayList<RecyclerViewDataClass>
lateinit var imageId : Array<Int>
lateinit var tutorialHeading : Array<String>
lateinit var tutorialText : Array<String>
lateinit var url : Array<String>
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_recycler_view_layout)
imageId = arrayOf(
R.drawable.brake,
R.drawable.brake,
)
tutorialHeading = arrayOf(
getString(R.string.scheibenbremse_lüften_heading),
getString(R.string.felgenbremse_richten_heading),
)
tutorialText = arrayOf(
getString(R.string.scheibenbremse_lüften_text),
getString(R.string.felgenbremse_richten_text),
)
url = arrayOf(
getString(R.string.url_a),
getString(R.string.url_b),
)
newRecylerview =findViewById(R.id.recyclerView)
newRecylerview.layoutManager = LinearLayoutManager(this)
newRecylerview.setHasFixedSize(true)
newArrayList = arrayListOf<RecyclerViewDataClass>()
tempArrayList = arrayListOf<RecyclerViewDataClass>()
getUserdata()
}
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
menuInflater.inflate(R.menu.menu_item,menu)
val item = menu?.findItem(R.id.search_action)
val searchView = item?.actionView as SearchView
searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener{
override fun onQueryTextSubmit(query: String?): Boolean {
TODO("Not yet implemented")
}
override fun onQueryTextChange(newText: String?): Boolean {
tempArrayList.clear()
val searchText = newText!!.toLowerCase(Locale.getDefault())
if (searchText.isNotEmpty()){
newArrayList.forEach {
if (it.heading.toLowerCase(Locale.getDefault()).contains(searchText)){
tempArrayList.add(it)
}
}
newRecylerview.adapter!!.notifyDataSetChanged()
}else{
tempArrayList.clear()
tempArrayList.addAll(newArrayList)
newRecylerview.adapter!!.notifyDataSetChanged()
}
return false
}
})
return super.onCreateOptionsMenu(menu)
}
private fun getUserdata() {
for(i in imageId.indices){
val news = RecyclerViewDataClass(imageId[i],tutorialHeading[i],url[i])
newArrayList.add(news)
}
tempArrayList.addAll(newArrayList)
val adapter = RecyclerViewAdapter(tempArrayList)
newRecylerview.adapter = adapter
adapter.setOnItemClickListener(object : RecyclerViewAdapter.onItemClickListener{
override fun onItemClick(position: Int) {
val intent = Intent(this@RecyclerViewLayout,TutorialsActivity::class.java)
intent.putExtra("tutorialHeading",newArrayList[position].heading)
intent.putExtra("imageId",newArrayList[position].titleImage)
intent.putExtra("url",newArrayList[position].url)
intent.putExtra("tutorialText",tutorialText[position])
startActivity(intent)
}
})
}}
RecyclerViewAdapter.kt
class RecyclerViewAdapter(private val newsList : ArrayList<RecyclerViewDataClass>) : RecyclerView.Adapter<RecyclerViewAdapter.MyViewHolder>(),
Filterable {
private lateinit var mListener : onItemClickListener
interface onItemClickListener{
fun onItemClick(position : Int)
}
fun setOnItemClickListener(listener: onItemClickListener){
mListener = listener
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
val itemView = LayoutInflater.from(parent.context).inflate(R.layout.list_item,
parent,false)
return MyViewHolder(itemView,mListener)
}
override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
val currentItem = newsList[position]
holder.titleImage.setImageResource(currentItem.titleImage)
holder.tvHeading.text = currentItem.heading
}
override fun getItemCount(): Int {
return newsList.size
}
class MyViewHolder(itemView : View, listener: onItemClickListener) : RecyclerView.ViewHolder(itemView){
val titleImage : ShapeableImageView = itemView.findViewById(R.id.title_image)
val tvHeading : TextView = itemView.findViewById(R.id.tvHeading)
init {
itemView.setOnClickListener {
listener.onItemClick(adapterPosition)
}
}
}
override fun getFilter(): Filter {
TODO("Not yet implemented")
}}
RecyclerViewDataClass.kt
data class RecyclerViewDataClass(var titleImage: Int, var heading: String, val url: String)
**Tutorials Activity**
class TutorialsActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_tutorials)
val headingNews : TextView = findViewById(R.id.heading)
val mainNews : TextView = findViewById(R.id.news)
val imageNews : ImageView = findViewById(R.id.image_heading)
val bundle : Bundle?= intent.extras
val tutorialHeading = bundle!!.getString("tutorialHeading")
val imageId = bundle.getInt("imageId")
val tutorialText = bundle.getString("tutorialText")
val url = bundle.getString("url")
headingNews.text = tutorialHeading
mainNews.text = tutorialText
imageNews.setImageResource(imageId)
imageNews.setOnClickListener {
val openURL = Intent(Intent.ACTION_VIEW)
openURL.data = Uri.parse(url.toString())
startActivity(openURL)
}
}}
I believe you can pass data about which button is clicked using intents. Here's a link about that: How to Pass custom object via intent in kotlin
For example, you can pass "A" if button A is clicked and "B" if button B is clicked, and then get that string in RecyclerViewLayout.kt to determine which elements should be shown.