1 files changed, 167 insertions, 0 deletions
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/camera/LatLngBoundsActivity.kt b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/camera/LatLngBoundsActivity.kt
new file mode 100644
index 0000000000..6f318f77eb
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/camera/LatLngBoundsActivity.kt
@@ -0,0 +1,167 @@
+package com.mapbox.mapboxsdk.testapp.activity.camera
+
+import android.content.Context
+import android.os.Bundle
+import android.support.design.widget.BottomSheetBehavior
+import android.support.v7.app.AppCompatActivity
+import android.view.View
+import com.mapbox.geojson.FeatureCollection
+import com.mapbox.geojson.FeatureCollection.fromJson
+import com.mapbox.geojson.Point
+import com.mapbox.mapboxsdk.geometry.LatLng
+import com.mapbox.mapboxsdk.geometry.LatLngBounds
+import com.mapbox.mapboxsdk.maps.MapboxMap
+import com.mapbox.mapboxsdk.maps.Style
+import com.mapbox.mapboxsdk.style.layers.Property.ICON_ANCHOR_CENTER
+import com.mapbox.mapboxsdk.style.layers.PropertyFactory.*
+import com.mapbox.mapboxsdk.style.layers.SymbolLayer
+import com.mapbox.mapboxsdk.style.sources.GeoJsonSource
+import com.mapbox.mapboxsdk.testapp.R
+import com.mapbox.mapboxsdk.testapp.utils.GeoParseUtil.loadStringFromAssets
+import com.mapbox.mapboxsdk.utils.BitmapUtils
+import kotlinx.android.synthetic.main.activity_latlngbounds.*
+import java.net.URISyntaxException
+
+/**
+ * Test activity showcasing using the LatLngBounds camera API.
+ */
+class LatLngBoundsActivity : AppCompatActivity() {
+
+  private lateinit var mapboxMap: MapboxMap
+  private lateinit var bottomSheetBehavior: BottomSheetBehavior<*>
+  private lateinit var bounds: LatLngBounds
+
+  private val peekHeight by lazy {
+    375.toPx(this) //375dp
+  }
+
+  private val additionalPadding by lazy {
+    32.toPx(this) //32dp
+  }
+
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+    setContentView(R.layout.activity_latlngbounds)
+    initMapView(savedInstanceState)
+  }
+
+  private fun initMapView(savedInstanceState: Bundle?) {
+    mapView.onCreate(savedInstanceState)
+    mapView.getMapAsync { map ->
+      mapboxMap = map
+
+      val featureCollection: FeatureCollection = fromJson(loadStringFromAssets(this, "points-sf.geojson"))
+      bounds = createBounds(featureCollection)
+
+      map.getCameraForLatLngBounds(bounds, createPadding(peekHeight))?.let {
+        map.cameraPosition = it
+      }
+
+      try {
+        loadStyle(featureCollection)
+      } catch (e: URISyntaxException) {
+        e.printStackTrace()
+      }
+    }
+  }
+
+  private fun loadStyle(featureCollection: FeatureCollection) {
+    mapboxMap.setStyle(Style.Builder()
+      .fromUri(Style.MAPBOX_STREETS)
+      .withLayer(SymbolLayer("symbol", "symbol")
+        .withProperties(
+          iconAllowOverlap(true),
+          iconIgnorePlacement(true),
+          iconImage("icon"),
+          iconAnchor(ICON_ANCHOR_CENTER)
+        )
+      )
+      .withSource(GeoJsonSource("symbol", featureCollection))
+      .withImage("icon", BitmapUtils.getDrawableFromRes(this@LatLngBoundsActivity, R.drawable.ic_android)!!)
+    ) {
+      initBottomSheet()
+      fab.setOnClickListener { bottomSheetBehavior.state = BottomSheetBehavior.STATE_EXPANDED }
+    }
+  }
+
+  private fun initBottomSheet() {
+    bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet)
+    bottomSheetBehavior.setBottomSheetCallback(object : BottomSheetBehavior.BottomSheetCallback() {
+      override fun onSlide(bottomSheet: View, slideOffset: Float) {
+        val offset = convertSlideOffset(slideOffset)
+        val bottomPadding = (peekHeight * offset).toInt()
+
+        mapboxMap.getCameraForLatLngBounds(bounds, createPadding(bottomPadding))?.let {
+          mapboxMap.cameraPosition = it
+        }
+      }
+
+      override fun onStateChanged(bottomSheet: View, newState: Int) {
+        // no-op
+      }
+    })
+  }
+
+  // slideOffset ranges from NaN to -1.0, range from 1.0 to 0 instead
+  fun convertSlideOffset(slideOffset: Float): Float {
+    return if (slideOffset.equals(Float.NaN)) {
+      1.0f
+    } else {
+      1 + slideOffset
+    }
+  }
+
+  fun createPadding(bottomPadding: Int): IntArray {
+    return intArrayOf(additionalPadding, additionalPadding, additionalPadding, bottomPadding)
+  }
+
+  private fun createBounds(featureCollection: FeatureCollection): LatLngBounds {
+    val boundsBuilder = LatLngBounds.Builder()
+    featureCollection.features()?.let {
+      for (feature in it) {
+        val point = feature.geometry() as Point
+        boundsBuilder.include(LatLng(point.latitude(), point.longitude()))
+      }
+    }
+    return boundsBuilder.build()
+  }
+
+  override fun onStart() {
+    super.onStart()
+    mapView.onStart()
+  }
+
+  override fun onResume() {
+    super.onResume()
+    mapView.onResume()
+  }
+
+  override fun onPause() {
+    super.onPause()
+    mapView.onPause()
+  }
+
+  override fun onStop() {
+    super.onStop()
+    mapView.onStop()
+  }
+
+  override fun onLowMemory() {
+    super.onLowMemory()
+    mapView.onLowMemory()
+  }
+
+  override fun onDestroy() {
+    super.onDestroy()
+    mapView.onDestroy()
+  }
+
+  override fun onSaveInstanceState(outState: Bundle) {
+    super.onSaveInstanceState(outState)
+    mapView.onSaveInstanceState(outState)
+  }
+
+}
+
+fun Int.toPx(context: Context): Int = (this * context.resources.displayMetrics.density).toInt()
+