[android] update viewport size when framebuffer size changed

platform/android/src/native_map_view.cpp

@@ -177,6 +177,11 @@ void NativeMapView::invalidate() {
 void NativeMapView::render() {
     activate();
 
+    if (framebufferSizeChanged) {
+        getContext().viewport = { 0, 0, getFramebufferSize() };
+        framebufferSizeChanged = false;
+    }
+
     updateViewBinding();
     map->render(*this);
 
@@ -688,6 +693,7 @@ void NativeMapView::resizeView(int w, int h) {
 void NativeMapView::resizeFramebuffer(int w, int h) {
     fbWidth = w;
     fbHeight = h;
+    framebufferSizeChanged = true;
     invalidate();
 }
 

platform/android/src/native_map_view.hpp

@@ -90,6 +90,7 @@ private:
     int height = 0;
     int fbWidth = 0;
     int fbHeight = 0;
+    bool framebufferSizeChanged = true;
 
     int availableProcessors = 0;
     size_t totalMemory = 0;