Adding custom Recenter overlay

app/src/main/java/uca/baptistearthur/geocaching/Map.kt

@@ -23,6 +23,7 @@ import org.osmdroid.views.overlay.compass.InternalCompassOrientationProvider
 import org.osmdroid.views.overlay.mylocation.GpsMyLocationProvider
 import org.osmdroid.views.overlay.mylocation.MyLocationNewOverlay
 
+
 class Map : Fragment() {
     private lateinit var map : MapView
     val defaultPoint = GeoPoint(48.8583, 2.2944)
@@ -67,6 +68,11 @@ class Map : Fragment() {
         myLocation.enableFollowLocation()
         myLocation.enableMyLocation()
         map.overlays.add(myLocation)
+
+        val recenter = RecenterOverlay(GpsMyLocationProvider(context), map)
+        recenter.enableMyLocation()
+        map.overlays.add(recenter);
+
     }
 
     override fun onCreateView(

app/src/main/java/uca/baptistearthur/geocaching/RecenterOverlay.kt

@@ -0,0 +1,72 @@
+package uca.baptistearthur.geocaching
+
+import android.graphics.*
+import android.graphics.drawable.shapes.Shape
+import android.location.Location
+import android.view.GestureDetector
+import android.view.MotionEvent
+import androidx.appcompat.widget.AppCompatDrawableManager
+import androidx.core.content.ContextCompat
+import org.osmdroid.util.GeoPoint
+import org.osmdroid.views.MapView
+import org.osmdroid.views.overlay.Overlay
+import org.osmdroid.views.overlay.mylocation.IMyLocationConsumer
+import org.osmdroid.views.overlay.mylocation.IMyLocationProvider
+
+
+class RecenterOverlay(val myLocationProvider: IMyLocationProvider, val mapView: MapView) : Overlay(), GestureDetector.OnGestureListener, IMyLocationConsumer {
+
+    private val gestureDetector: GestureDetector = GestureDetector(mapView.context, this)
+
+    private var circleRectF=RectF();
+
+
+    override fun draw(canvas: Canvas, mapView: MapView, shadow: Boolean) {
+
+        val circleSize = 300f
+        val circlePadding = 20f
+        val circleX = canvas.width - circleSize - circlePadding
+        val circleY = canvas.height - circleSize - circlePadding
+        circleRectF=RectF(circleX, circleY, circleX + circleSize, circleY + circleSize)
+
+        val paint = Paint().apply {
+            color = Color.WHITE
+            style = Paint.Style.FILL
+        }
+        canvas.drawCircle(
+            circleX + circleSize / 2,
+            circleY + circleSize / 2,
+            circleSize / 2,
+            paint
+        )
+
+        val iconSize = 180
+        val icon = ContextCompat.getDrawable(mapView.context, R.drawable.center)
+
+        val iconX = (circleX + circleSize / 2 - iconSize / 2).toInt()
+        val iconY = (circleY + circleSize / 2 - iconSize / 2).toInt()
+
+        icon?.setBounds(iconX, iconY, iconX + iconSize, iconY + iconSize)
+        icon?.draw(canvas)
+    }
+
+    fun enableMyLocation() {
+        myLocationProvider.startLocationProvider(this);
+    }
+
+    override fun onSingleTapConfirmed(e: MotionEvent?, mapView: MapView?) =
+        myLocationProvider.lastKnownLocation?.let {
+            if (e != null && circleRectF.contains(e.x, e.y)) {
+                mapView?.controller?.setCenter(GeoPoint(it.latitude, it.longitude))
+            }
+            true
+        } ?: false
+
+    override fun onDown(p0: MotionEvent) = true
+    override fun onShowPress(p0: MotionEvent) = Unit
+    override fun onSingleTapUp(p0: MotionEvent) = true
+    override fun onScroll(p0: MotionEvent, p1: MotionEvent, p2: Float, p3: Float) = true;
+    override fun onLongPress(p0: MotionEvent) = Unit
+    override fun onFling(p0: MotionEvent, p1: MotionEvent, p2: Float, p3: Float) = true
+    override fun onLocationChanged(location: Location?, source: IMyLocationProvider?) = Unit
+}

app/src/main/res/drawable/center.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M5,15L3,15v4c0,1.1 0.9,2 2,2h4v-2L5,19v-4zM5,5h4L9,3L5,3c-1.1,0 -2,0.9 -2,2v4h2L5,5zM19,3h-4v2h4v4h2L21,5c0,-1.1 -0.9,-2 -2,-2zM19,19h-4v2h4c1.1,0 2,-0.9 2,-2v-4h-2v4zM12,8c-2.21,0 -4,1.79 -4,4s1.79,4 4,4 4,-1.79 4,-4 -1.79,-4 -4,-4zM12,14c-1.1,0 -2,-0.9 -2,-2s0.9,-2 2,-2 2,0.9 2,2 -0.9,2 -2,2z"/>
+</vector>