在离线时存储在房间数据库中的数据 我从API中获取数据，然后将其存储在房间数据库中。我试图在离线时显示存储在房间数据库中的数据，但它一直在破坏自身。请帮忙。 我想要...

Question

if (!isConnected){
            program.text = "Requires internet"
            //startTime.visibility = View.INVISIBLE
            //endTime.visibility = View.INVISIBLE
//            emptyString.visibility = View.VISIBLE
//            emptyString.text = "No internet"
            apiViewModel.programs.observe(this) {

                    programs -> run {
                adapter.submitList(programs)
               // Log.d("Programs", "$programs")
            }
            }
            play.setOnClickListener {
                Toast.makeText(this, "Requires internet", Toast.LENGTH_SHORT).show()
            }
            stop.setOnClickListener {
                finish()
                stopService(Intent(this, BackgroundStreamService::class.java))
            }

        } else{
            //startTime.visibility = View.VISIBLE
            //endTime.visibility = View.VISIBLE
            play.setOnClickListener {

                if(isPlaying){


                    play.setImageResource(R.drawable.baseline_play_arrow_24)
                    stopService(Intent(this, BackgroundStreamService::class.java))
                    isPlaying = false


                }else{
                    startForegroundService(Intent(this, BackgroundStreamService::class.java))
                    isPlaying = true
                    //play.setBackgroundResource(R.drawable.baseline_stop_24)
                    play.setImageResource(R.drawable.baseline_stop_24)
                }


            }

            stop.setOnClickListener {

                finish()
                stopService(Intent(this, BackgroundStreamService::class.java))

            }
            //fetchPrograms()
            apiViewModel.programs.observe(this) {

                    programs -> run {
                adapter.submitList(programs)
                Log.d("Programs", "$programs")
            }
        }

        }

rrepo

val programs: LiveData<List<Program>> = Transformations.map(programDao.getPrograms()){
        it.asDomainModel()
    }
    suspend fun refreshPrograms(){
        withContext(Dispatchers.IO){
            val programs = NodejsApi.programApi.getProgramAsync().await()
            programDao.insertAll(programs)
        }
    }

我还需要在检查手机是否连接到Internet之后还需要检查数据库中是否存在数据。

if (programs.isEmpty()){
       emptyString.visibility = View.VISIBLE
       emptyString.text = "No data in the database. \nPlease turn on the internet."
 }else{
       adapter.submitList(programs)

}