app/app/src/main/java/com/danilafe/fencelessgrazing/CollarListActivity.kt

122 行
4.1 KiB
Kotlin

package com.danilafe.fencelessgrazing
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import androidx.preference.PreferenceManager
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.android.volley.RequestQueue
import com.android.volley.Response
import com.android.volley.toolbox.Volley
import com.danilafe.fencelessgrazing.model.CollarSummary
import com.danilafe.fencelessgrazing.requests.CollarRequest
import org.osmdroid.config.Configuration
import org.osmdroid.tileprovider.tilesource.TileSourceFactory
import org.osmdroid.util.GeoPoint
import org.osmdroid.views.MapView
import org.osmdroid.views.overlay.Marker
import java.util.*
import kotlin.concurrent.timerTask
class CollarListActivity : AppCompatActivity() {
// The list of collar summaries and its list adapter.
private val summaries : MutableList<CollarSummary> = mutableListOf()
private lateinit var summaryAdapter: CollarSummaryAdapter
private lateinit var collarList: RecyclerView
// The API token and request queue.
private lateinit var token: String
private lateinit var queue: RequestQueue
// The OpenStreetMap map.
private lateinit var map: MapView
private val collarOverlays: MutableMap<Int, Marker> = mutableMapOf()
// Timer used to schedule refresh
private val refreshTimer = Timer()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
Configuration.getInstance().load(applicationContext,
PreferenceManager.getDefaultSharedPreferences(applicationContext))
setContentView(R.layout.activity_collar_list)
findViews()
token = intent.getStringExtra("token")!!
map.setTileSource(TileSourceFactory.MAPNIK)
queue = Volley.newRequestQueue(this)
setupCollarList()
}
override fun onResume() {
super.onResume()
map.onResume()
refreshTimer.schedule(timerTask { triggerRefresh() }, 0L, 5000L)
}
override fun onPause() {
super.onPause()
map.onPause()
refreshTimer.cancel()
}
private fun triggerRefresh() {
val request = CollarRequest(getString(R.string.apiUrl), token,
Response.Listener {
summaries.clear()
summaries.addAll(it)
summaryAdapter.notifyDataSetChanged()
updateMapOverlay()
},
Response.ErrorListener {
Toast.makeText(this, "Failed to retrieve collar list!", Toast.LENGTH_SHORT).show()
}
)
queue.add(request)
}
private fun findViews() {
collarList = findViewById(R.id.collarSummaryList)
map = findViewById(R.id.map)
}
private fun setupCollarList() {
val layoutManager = LinearLayoutManager(collarList.context)
summaryAdapter = CollarSummaryAdapter(summaries)
collarList.adapter = summaryAdapter
collarList.layoutManager = layoutManager
collarList.addItemDecoration(DividerItemDecoration(collarList.context, layoutManager.orientation))
refreshTimer.schedule(timerTask { triggerRefresh() }, 0L, 5000L)
}
private fun updateMapOverlay() {
val currentSet = mutableSetOf<Int>()
summaries.forEach {
// Create or update overlay
val overlay = collarOverlays[it.id] ?: Marker(map)
overlay.title = it.name
overlay.position = GeoPoint(it.pos.longitude.toDouble(), it.pos.latitude.toDouble())
// Store new / existing overlay.
if(!collarOverlays.containsKey(it.id)) map.overlays.add(overlay)
collarOverlays[it.id] = overlay
currentSet.add(it.id)
}
val previousSet = collarOverlays.keys
previousSet.forEach {
if(!currentSet.contains(it)) {
map.overlays.remove(collarOverlays[it])
collarOverlays.remove(it)
}
}
map.invalidate()
}
}