Added dialog for satellite selection. Showing only selected passes in the recycler.

app/build.gradle

@@ -8,7 +8,7 @@ android {
     buildToolsVersion "29.0.2"
     defaultConfig {
         applicationId "com.rtbishop.lookingsat"
-        minSdkVersion 22
+        minSdkVersion 24
         targetSdkVersion 29
         versionCode 1
         versionName "0.2"

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

@@ -55,7 +55,7 @@ class SkyFragment : Fragment() {
                 recView.visibility = View.INVISIBLE
                 progressBar.visibility = View.VISIBLE
                 progressBar.isIndeterminate = true
-                satPassList = viewModel.updateRecycler()
+                satPassList = viewModel.getPassesForSelectedSatellites()
                 recAdapter = SatPassAdapter(satPassList)
                 recView.adapter = recAdapter
                 progressBar.isIndeterminate = false
@@ -67,41 +67,43 @@ class SkyFragment : Fragment() {
         fab.setOnClickListener { showSelectSatDialog() }
     }
 
-    private var selectedSatList: List<TLE> = emptyList()
-
     private fun showSelectSatDialog() {
-        val tleList = mutableListOf<TLE>()
-        val listSize = viewModel.tleList.size
-        val satList = arrayOfNulls<String>(listSize)
-        val checkedSatList = BooleanArray(listSize)
-        if (selectedSatList.isEmpty()) {
-            for ((position, tle) in viewModel.tleList.withIndex()) {
-                satList[position] = tle.name
-                checkedSatList[position] = false
+        val tleSelectedMap = viewModel.tleSelectedMap
+        val tleMainListSize = viewModel.tleMainList.size
+
+        val tleNameArray = arrayOfNulls<String>(tleMainListSize)
+        val tleCheckedArray = BooleanArray(tleMainListSize)
+
+        if (tleSelectedMap.isEmpty()) {
+            for ((position, tle) in viewModel.tleMainList.withIndex()) {
+                tleNameArray[position] = tle.name
+                tleCheckedArray[position] = false
+            }
+        } else {
+            for ((position, tle) in viewModel.tleMainList.withIndex()) {
+                tleNameArray[position] = tle.name
+                tleCheckedArray[position] = viewModel.tleSelectedMap.getOrDefault(tle, false)
             }
         }
 
+        val selectionMap = mutableMapOf<TLE, Boolean>()
         val builder = AlertDialog.Builder(activity as MainActivity)
         builder.setTitle("Select satellites to track")
-
-        builder.setMultiChoiceItems(satList, checkedSatList) { _, which, isChecked ->
-            checkedSatList[which] = isChecked
+            .setMultiChoiceItems(tleNameArray, tleCheckedArray) { _, which, isChecked ->
+                selectionMap[viewModel.tleMainList[which]] = isChecked
             }
-
-        builder.setPositiveButton("Select") { _, _ ->
-            for (index in checkedSatList.indices) {
-                val checked = checkedSatList[index]
-                if (checked) {
-                    tleList.add(viewModel.tleList[index])
+            .setPositiveButton("Ok") { _, _ ->
+                for ((tle, value) in selectionMap) {
+                    tleSelectedMap[tle] = value
                 }
             }
+            .setNeutralButton("Clear All") { _, _ ->
+                tleSelectedMap.clear()
             }
-
-        builder.setNegativeButton("Cancel") { dialog, _ ->
+            .setNegativeButton("Cancel") { dialog, _ ->
                 dialog.cancel()
             }
-
-        val dialog = builder.create()
-        dialog.show()
+            .create()
+            .show()
     }
 }

app/src/main/java/com/rtbishop/lookingsat/vm/MainViewModel.kt

@@ -50,7 +50,8 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
     )
     val gsp: LiveData<GroundStationPosition> = _gsp
 
-    var tleList: List<TLE> = loadTwoLineElementFile().sortedWith(compareBy { it.name })
+    var tleMainList = loadTwoLineElementFile().sortedWith(compareBy { it.name })
+    var tleSelectedMap = mutableMapOf<TLE, Boolean>()
 
     private fun loadTwoLineElementFile(): List<TLE> {
         return try {
@@ -61,15 +62,16 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         }
     }
 
-    suspend fun updateRecycler(): List<SatPass> {
+    suspend fun getPassesForSelectedSatellites(): List<SatPass> {
         val satPassList = mutableListOf<SatPass>()
         var sortedList = listOf<SatPass>()
         withContext(Dispatchers.Default) {
-            for (tle in tleList.subList(0, 1)) {
+            for ((tle, value) in tleSelectedMap) {
+                if (value) {
                     try {
                         Log.d(tag, "Trying ${tle.name}")
                         val passPredictor = PassPredictor(tle, gsp.value)
-                    val passes = passPredictor.getPasses(Date(), 6, false)
+                        val passes = passPredictor.getPasses(Date(), 6, true)
                         for (pass in passes) {
                             Log.d(tag, "Trying ${pass.maxEl}")
                             satPassList.add(SatPass(tle.name, tle.catnum, pass))
@@ -82,6 +84,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                         Log.d(tag, "Certain satellites shall not pass")
                     }
                 }
+            }
             sortedList = satPassList.sortedWith(compareBy { it.pass.startTime })
         }
         return sortedList
@@ -111,7 +114,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
                 getApplication<Application>().openFileOutput(tleFile, Context.MODE_PRIVATE).use {
                     it.write(stream.readBytes())
                 }
-                tleList = TLE.importSat(stream)
+                tleMainList = TLE.importSat(stream)
                 _debugMessage.postValue("TLE file was updated")
             } catch (exception: IOException) {
                 _debugMessage.postValue("Couldn't update TLE file")