Start working on bounding box display

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

@@ -1,18 +1,66 @@
 package com.danilafe.fencelessgrazing
 
+import android.graphics.Color
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import com.danilafe.fencelessgrazing.model.CollarPos
+import com.danilafe.fencelessgrazing.model.Polygon
+import org.osmdroid.util.GeoPoint
+import org.osmdroid.views.MapView
 
 class CollarDetailActivity : AppCompatActivity() {
 
     private lateinit var token: String
     private var collarId: Int = -1
 
+    private lateinit var map: MapView
+
+    private lateinit var mapPolygon: org.osmdroid.views.overlay.Polygon
+    private var boundingBox: Polygon? = null
+        set(newValue) {
+            if(newValue != null) updateBoundingBox(field, newValue)
+            else clearBoundingBox()
+            field = newValue
+        }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_collar_detail)
 
         token = intent.getStringExtra("token")!!
         collarId = intent.getIntExtra("identifier", -1)
+
+        map = findViewById(R.id.detailMap)
+        mapPolygon = org.osmdroid.views.overlay.Polygon(map)
+        configureMapPolygon()
+    }
+
+    private fun configureMapPolygon() {
+        mapPolygon.fillPaint.color = Color.CYAN
+        mapPolygon.fillPaint.alpha = 127
+        mapPolygon.outlinePaint.strokeWidth = 0.0f
+        mapPolygon.title = "Valid Grazing Area"
+    }
+
+    private fun updateBoundingBox(oldValue: Polygon?, polygon: Polygon) {
+        if(oldValue == null) map.overlays.add(mapPolygon)
+        val points = polygon.dataPoints.map { GeoPoint(it.longitude.toDouble(), it.latitude.toDouble()) }
+        val polygonPoints = points.toMutableList()
+        polygonPoints.add(polygonPoints[0])
+        mapPolygon.points = polygonPoints
+    }
+
+    private fun clearBoundingBox() {
+        map.overlays.remove(mapPolygon)
+    }
+
+    override fun onPause() {
+        super.onPause()
+        map.onPause()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        map.onResume()
     }
 }

app/src/main/java/com/danilafe/fencelessgrazing/model/Polygon.kt

@@ -1,2 +1,3 @@
 package com.danilafe.fencelessgrazing.model
 
+data class Polygon(val dataPoints : List<CollarPos>)

app/src/main/res/layout/activity_collar_detail.xml

@@ -5,5 +5,13 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".CollarDetailActivity">
+    <org.osmdroid.views.MapView
+        android:id="@+id/detailMap"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        app:layout_constraintDimensionRatio="16:9"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>