Kotlin livedata observer not triggered

Question

i'm practising a bit with kotlin and was testing Room and livedata, my app gets data from a json and the stores it in room, i want to move this network call to its own file and class, but if i do so the observer i set to get the changes don't trigger anymore, any help would be appreciated

here is a snipped of my mainactivity, if more is needed to know what happens please let me know

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.TextView
import android.widget.Toast
import androidx.activity.viewModels
import androidx.lifecycle.Observer
import androidx.lifecycle.ViewModelProvider
import androidx.lifecycle.lifecycleScope
import androidx.lifecycle.viewModelScope
import androidx.room.Room
import com.optiva.videoplayer.data.*
import com.optiva.videoplayer.network.GetData
import com.optiva.videoplayer.network.Networking
import com.optiva.videoplayer.network.RetrofitConnect
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response


class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val dbcategories = Room.databaseBuilder(applicationContext, CategoriesDatabase::class.java,"categories.db").build()
        val dbvideo = Room.databaseBuilder(applicationContext, VideosDatabase::class.java,"videos.db").build()


        val retrofitData = RetrofitConnect.retrofitInst?.create(GetData::class.java)
        val categoriesList = retrofitData?.getAll()

        categoriesList?.enqueue(object: Callback<DataList> {
            override fun onResponse(
                call: Call<DataList>,
                response: Response<DataList>
            ) {
                val test = response?.body()
                val cat = test?.categories
                val vid = test?.videos

                lifecycleScope.launch(Dispatchers.IO) {
                    if (cat != null) {
                        for(c in cat){
                            dbcategories.categoriesDAO().insertAll(CategoriesEntity(c.id,c.title,c.type))
                        }
                    }
                    if (vid != null) {
                        for(v in vid){
                            dbvideo.VideosDAO().insertAll(VideosEntity(v.id,v.thumb,v.videoUrl,v.categoryId,v.name))
                        }
                    }

                }
            }

            override fun onFailure(call: Call<DataList>, t: Throwable) {
                Toast.makeText(applicationContext,"error", Toast.LENGTH_LONG).show()
            }

        })
        val textView: TextView = findViewById(R.id.test) as TextView
        dbcategories.categoriesDAO().getALL().observeForever({categories ->
            if(categories.size>0){
                textView.text= categories[0].title
            }
        })

        dbcategories.categoriesDAO().getALL().observe(this,  {categories ->
            if(categories.size>0){
                textView.text= categories[0].title
            }


    }
} ```

Kotlin livedata observer not triggered

0 Answers0