[android] fix layer ownership

1 files changed, 15 insertions, 2 deletions

diff --git a/platform/android/src/style/layers/layer.cpp b/platform/android/src/style/layers/layer.cpp
index 3c1fc0af62..aa6df40470 100644
--- a/platform/android/src/style/layers/layer.cpp
+++ b/platform/android/src/style/layers/layer.cpp
@@ -32,8 +32,17 @@ namespace android {
     Layer::~Layer() {
     }
 
-    jni::String Layer::getId(jni::JNIEnv& env) {
-        return jni::Make<jni::String>(env, layer.getID());
+    void Layer::addToMap(mbgl::Map& _map, mbgl::optional<std::string> before) {
+        //Check to see if we own the layer first
+        if (!ownedLayer) {
+            throw std::runtime_error("Cannot add layer twice");
+        }
+
+        //Add layer to map
+        _map.addLayer(releaseCoreLayer(), before);
+
+        //Save pointer to the map
+        this->map = &_map;
     }
 
     std::unique_ptr<mbgl::style::Layer> Layer::releaseCoreLayer() {
@@ -41,6 +50,10 @@ namespace android {
         return std::move(ownedLayer);
     }
 
+    jni::String Layer::getId(jni::JNIEnv& env) {
+        return jni::Make<jni::String>(env, layer.getID());
+    }
+
     void Layer::setLayoutProperty(jni::JNIEnv& env, jni::String jname, jni::Object<> jvalue) {
         Value value(env, jvalue);