[android] - add 3D buildings example (#8845)

[android] - add support for filter for fillextrusionlayer.

5 files changed, 128 insertions, 0 deletions

diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
index fc10a01356..9ede763533 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml
@@ -459,6 +459,17 @@
                 android:value=".activity.FeatureOverviewActivity"/>
         </activity>
         <activity
+            android:name=".activity.style.BuildingFillExtrusionActivity"
+            android:description="@string/description_building_fill_extrusion_layer"
+            android:label="@string/activity_building_fill_extrusion_layer">
+            <meta-data
+                android:name="@string/category"
+                android:value="@string/category_style"/>
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".activity.FeatureOverviewActivity"/>
+        </activity>
+        <activity
             android:name=".activity.style.SymbolLayerActivity"
             android:description="@string/description_symbol_layer"
             android:label="@string/activity_symbol_layer">
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/BuildingFillExtrusionActivity.java b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/BuildingFillExtrusionActivity.java
new file mode 100644
index 0000000000..f444aa40f0
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/BuildingFillExtrusionActivity.java
@@ -0,0 +1,95 @@
+package com.mapbox.mapboxsdk.testapp.activity.style;
+
+import android.graphics.Color;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v7.app.AppCompatActivity;
+
+import com.mapbox.mapboxsdk.maps.MapView;
+import com.mapbox.mapboxsdk.maps.MapboxMap;
+import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
+import com.mapbox.mapboxsdk.style.functions.Function;
+import com.mapbox.mapboxsdk.style.functions.stops.IdentityStops;
+import com.mapbox.mapboxsdk.style.layers.FillExtrusionLayer;
+import com.mapbox.mapboxsdk.testapp.R;
+
+import static com.mapbox.mapboxsdk.style.layers.Filter.eq;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionBase;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionColor;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionHeight;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionOpacity;
+
+/**
+ * Test activity showing 3D buildings with a FillExtrusion Layer
+ */
+public class BuildingFillExtrusionActivity extends AppCompatActivity {
+
+  private MapView mapView;
+
+  @Override
+  public void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_building_layer);
+    mapView = (MapView) findViewById(R.id.mapView);
+    mapView.onCreate(savedInstanceState);
+    mapView.getMapAsync(new OnMapReadyCallback() {
+      @Override
+      public void onMapReady(@NonNull final MapboxMap map) {
+        FillExtrusionLayer fillExtrusionLayer = new FillExtrusionLayer("3d-buildings", "composite");
+        fillExtrusionLayer.setSourceLayer("building");
+        fillExtrusionLayer.setFilter(eq("extrude", "true"));
+        fillExtrusionLayer.setMinZoom(15);
+        fillExtrusionLayer.setProperties(
+          fillExtrusionColor(Color.LTGRAY),
+          fillExtrusionHeight(Function.property("height", new IdentityStops<Float>())),
+          fillExtrusionBase(Function.property("min_height", new IdentityStops<Float>())),
+          fillExtrusionOpacity(0.6f)
+        );
+        map.addLayer(fillExtrusionLayer);
+      }
+    });
+  }
+
+  @Override
+  protected void onStart() {
+    super.onStart();
+    mapView.onStart();
+  }
+
+  @Override
+  protected void onResume() {
+    super.onResume();
+    mapView.onResume();
+  }
+
+  @Override
+  protected void onPause() {
+    super.onPause();
+    mapView.onPause();
+  }
+
+  @Override
+  protected void onStop() {
+    super.onStop();
+    mapView.onStop();
+  }
+
+  @Override
+  public void onSaveInstanceState(Bundle outState) {
+    super.onSaveInstanceState(outState);
+    mapView.onSaveInstanceState(outState);
+  }
+
+  @Override
+  public void onLowMemory() {
+    super.onLowMemory();
+    mapView.onLowMemory();
+  }
+
+  @Override
+  public void onDestroy() {
+    super.onDestroy();
+    mapView.onDestroy();
+  }
+
+}
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_building_layer.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_building_layer.xml
new file mode 100644
index 0000000000..d9a10871b5
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_building_layer.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                xmlns:app="http://schemas.android.com/apk/res-auto"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:orientation="vertical">
+
+    <com.mapbox.mapboxsdk.maps.MapView
+        android:id="@id/mapView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:mapbox_cameraTargetLat="40.7135"
+        app:mapbox_cameraTargetLng="-74.0066"
+        app:mapbox_cameraTilt="45"
+        app:mapbox_cameraZoom="15"
+        app:mapbox_styleUrl="@string/mapbox_style_mapbox_streets"/>
+
+</RelativeLayout>
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/strings.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/strings.xml
index 6270eac72d..5b6cbb8c42 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/strings.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/values/strings.xml
@@ -58,6 +58,7 @@
     <string name="activity_url_transform">Url transform</string>
     <string name="activity_restricted_bounds">Restrict camera to a bounds</string>
     <string name="activity_fill_extrusion_layer">Fill extrusions</string>
+    <string name="activity_building_fill_extrusion_layer">Building layer</string>
 
     <!--Description-->
     <string name="description_user_location_tracking">Tracks the location of the user</string>
@@ -115,6 +116,7 @@
     <string name="description_url_transform">Transform urls on the fly</string>
     <string name="description_restricted_bounds">Limit viewport to Iceland</string>
     <string name="description_fill_extrusion_layer">Shows how to add 3D extruded shapes</string>
+    <string name="description_building_fill_extrusion_layer">Shows how to show 3D extruded buildings</string>
 
     <!--Categories-->
     <string name="category">category</string>
diff --git a/platform/android/src/style/layers/layer.cpp b/platform/android/src/style/layers/layer.cpp
index 1ebad19a87..d571c3fd2e 100644
--- a/platform/android/src/style/layers/layer.cpp
+++ b/platform/android/src/style/layers/layer.cpp
@@ -121,6 +121,8 @@ namespace android {
             layer.as<SymbolLayer>()->setFilter(filter);
         } else if (layer.is<CircleLayer>()) {
             layer.as<CircleLayer>()->setFilter(filter);
+        } else if (layer.is<FillExtrusionLayer>()){
+            layer.as<FillExtrusionLayer>()->setFilter(filter);
         } else {
             mbgl::Log::Warning(mbgl::Event::JNI, "Layer doesn't support filters");
         }