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