Significantly revamped the recycler behaviour. Now accurately showing the satellites currently overhead and their pass progress, removing them from the list after the pass is finished.

app/src/main/java/com/rtbishop/look4sat/MainViewModel.kt

@@ -65,8 +65,8 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
     private val _debugMessage = MutableLiveData<String>()
     val debugMessage: LiveData<String> = _debugMessage
 
-    private val _satPassList = MutableLiveData<List<SatPass>>()
-    val passSatList: LiveData<List<SatPass>> = _satPassList
+    private val _satPassList = MutableLiveData<MutableList<SatPass>>()
+    val passSatList: LiveData<MutableList<SatPass>> = _satPassList
 
     private val _gsp = MutableLiveData<GroundStationPosition>()
     val gsp: LiveData<GroundStationPosition> = _gsp
@@ -181,6 +181,11 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
     suspend fun getPasses() {
         val passList = mutableListOf<SatPass>()
         val dateNow = Date()
+        val dateFuture = Calendar.getInstance().let {
+            it.time = dateNow
+            it.add(Calendar.HOUR, hoursAhead)
+            it.time
+        }
         withContext(Dispatchers.Default) {
             tleSelection.forEach { indexOfSelection ->
                 val tle = tleMainList[indexOfSelection]
@@ -194,6 +199,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                     _debugMessage.postValue("${tle.name} shall not pass")
                 }
             }
+            passList.removeAll { it.pass.startTime.after(dateFuture) }
             passList.removeAll { it.pass.endTime.before(dateNow) }
             passList.removeAll { it.pass.maxEl < minEl }
             passList.sortBy { it.pass.startTime }

app/src/main/java/com/rtbishop/look4sat/repo/SatPass.kt

@@ -30,5 +30,6 @@ import kotlinx.android.parcel.RawValue
 data class SatPass(
     val tle: TLE,
     val predictor: @RawValue PassPredictor,
-    val pass: @RawValue SatPassTime
+    val pass: @RawValue SatPassTime,
+    var progress: Int = 0
 ) : Parcelable

app/src/main/java/com/rtbishop/look4sat/ui/SatPassAdapter.kt

@@ -33,10 +33,34 @@ import java.util.*
 
 class SatPassAdapter : RecyclerView.Adapter<SatPassAdapter.PassHolder>() {
 
-    private var satPassList = emptyList<SatPass>()
+    private var satPassList = mutableListOf<SatPass>()
 
-    fun setList(list: List<SatPass>) {
+    fun setList(list: MutableList<SatPass>) {
         satPassList = list
+        notifyDataSetChanged()
+    }
+
+    fun updateRecycler() {
+        val timeNow = Date()
+        val iterator = satPassList.listIterator()
+        while (iterator.hasNext()) {
+            val satPass = iterator.next()
+            if (satPass.progress < 100) {
+                val timeStart = satPass.pass.startTime
+                val timeEnd = satPass.pass.endTime
+                if (timeNow.after(timeStart)) {
+                    val index = satPassList.indexOf(satPass)
+                    val deltaTotal = timeEnd.time.minus(timeStart.time)
+                    val deltaNow = timeNow.time.minus(timeStart.time)
+                    satPass.progress = ((deltaNow.toFloat() / deltaTotal.toFloat()) * 100).toInt()
+                    notifyItemChanged(index)
+                }
+            } else {
+                val index = satPassList.indexOf(satPass)
+                iterator.remove()
+                notifyItemRemoved(index)
+            }
+        }
     }
 
     override fun getItemCount(): Int {
@@ -51,7 +75,7 @@ class SatPassAdapter : RecyclerView.Adapter<SatPassAdapter.PassHolder>() {
     }
 
     override fun onBindViewHolder(holder: PassHolder, position: Int) {
-        holder.bind(position)
+        holder.bind(satPassList[position])
     }
 
     inner class PassHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
@@ -62,11 +86,9 @@ class SatPassAdapter : RecyclerView.Adapter<SatPassAdapter.PassHolder>() {
         private val passVector = itemView.findViewById<TextView>(R.id.pass_azVector)
         private val passStart = itemView.findViewById<TextView>(R.id.pass_aosTime)
         private val passEnd = itemView.findViewById<TextView>(R.id.pass_losTime)
-        var progressBar = itemView.findViewById<ProgressBar>(R.id.pass_progress)
-
-        fun bind(position: Int) {
-            val satPass = satPassList[position]
+        private var progressBar = itemView.findViewById<ProgressBar>(R.id.pass_progress)
 
+        fun bind(satPass: SatPass) {
             val aosTime =
                 SimpleDateFormat("HH:mm:ss", Locale.getDefault()).format(satPass.pass.startTime)
             val losTime =
@@ -78,6 +100,7 @@ class SatPassAdapter : RecyclerView.Adapter<SatPassAdapter.PassHolder>() {
                 String.format("Az: %2d° -> %2d°", satPass.pass.aosAzimuth, satPass.pass.losAzimuth)
             passStart.text = String.format("AOS - %s", aosTime)
             passEnd.text = String.format("LOS - %s", losTime)
+            progressBar.progress = satPass.progress
 
             itemView.setOnClickListener {
                 val action = SkyFragmentDirections.actionNavSkyToNavRadar(satPass)

app/src/main/java/com/rtbishop/look4sat/ui/SkyFragment.kt

@@ -35,6 +35,7 @@ import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.SimpleItemAnimator
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
 import com.github.amsacode.predict4java.TLE
 import com.google.android.material.floatingactionbutton.FloatingActionButton
@@ -43,6 +44,7 @@ import com.rtbishop.look4sat.R
 import com.rtbishop.look4sat.repo.SatPass
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
+import java.util.*
 import java.util.concurrent.TimeUnit
 
 class SkyFragment : Fragment() {
@@ -56,7 +58,7 @@ class SkyFragment : Fragment() {
     private lateinit var aosTimer: CountDownTimer
     private lateinit var swipeLayout: SwipeRefreshLayout
     private lateinit var mainActivity: MainActivity
-    private lateinit var satPassList: List<SatPass>
+    private lateinit var satPassList: MutableList<SatPass>
     private var isTimerSet: Boolean = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -64,7 +66,7 @@ class SkyFragment : Fragment() {
         mainActivity = activity as MainActivity
         viewModel = ViewModelProvider(mainActivity).get(MainViewModel::class.java)
         recyclerAdapter = SatPassAdapter()
-        satPassList = emptyList()
+        satPassList = mutableListOf()
     }
 
     override fun onCreateView(
@@ -92,9 +94,9 @@ class SkyFragment : Fragment() {
         recyclerPasses.apply {
             layoutManager = LinearLayoutManager(mainActivity)
             adapter = recyclerAdapter
+            (itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false
         }
         recyclerAdapter.setList(satPassList)
-        recyclerAdapter.notifyDataSetChanged()
         setTimerForNextPass()
 
         swipeLayout.setProgressBackgroundColorSchemeResource(R.color.themeAccent)
@@ -112,7 +114,6 @@ class SkyFragment : Fragment() {
         viewModel.passSatList.observe(viewLifecycleOwner, Observer {
             satPassList = it
             recyclerAdapter.setList(satPassList)
-            recyclerAdapter.notifyDataSetChanged()
             setTimerForNextPass()
             swipeLayout.isRefreshing = false
         })
@@ -210,18 +211,12 @@ class SkyFragment : Fragment() {
         if (satPassList.isNotEmpty()) {
             resetTimer()
             try {
-                val timeNow = System.currentTimeMillis()
-                val nextPass = satPassList.first {
-                    it.pass.startTime.time.minus(timeNow) > 0
-                }
-                val passTime = nextPass.pass.startTime.time
-                val totalMillis = passTime.minus(timeNow)
+                val timeNow = Date()
+                val nextPass = satPassList.first { it.pass.startTime.after(timeNow) }
+                val totalMillis = nextPass.pass.startTime.time.minus(timeNow.time)
 
                 aosTimer = object : CountDownTimer(totalMillis, 1000) {
                     override fun onFinish() {
-                        Toast
-                            .makeText(activity, "Incoming ${nextPass.tle.name}", Toast.LENGTH_SHORT)
-                            .show()
                         setTimerForNextPass()
                     }
 
@@ -232,6 +227,7 @@ class SkyFragment : Fragment() {
                             TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished) % 60,
                             TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) % 60
                         )
+                        recyclerAdapter.updateRecycler()
                     }
                 }
                 aosTimer.start()