HERE SDK MapFragment implementation using fragment container - android-layout

Question

is there anyone here that is using a fragment container to show the MapFragment at runtime?
I have some issues with this implementation. If I replace the MapFragment with another FragmentActivity and popbackstack it. The Map view is not showing and it is in black.
Here is my Layout:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world"
tools:context=".MainActivity" />
<LinearLayout
android:id="#+id/main_frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</LinearLayout>
My Activity source code:
public void onCreate(Bundle savedInstanceState) {
.....
final String MAP_TAG = "map_tag";
mapFragment = new MapFragment();
getFragmentManager().beginTransaction().add(R.id.main_frame_layout, mapFragment,
MAP_TAG)
.commit();
....
setContentView(R.layout.activity_main);
}
#Override
protected void onPause() {
super.onPause();
if(map != null)
mapFragment.onPause();
}
#Override
protected void onResume() {
super.onResume();
if(map != null)
mapFragment.onResume();
}
#Override
public void onBackPressed() {
Log.d("Test","onBackPressed");
if( getFragmentManager().getBackStackEntryCount() == 0) {
Log.d("Test","pop back stack finish");
finish();
} else {
Log.d("Test","pop back stack");
getFragmentManager().popBackStack();
}
Log.d("Test","remaining in stack " + getFragmentManager().getBackStackEntryCount());
}

Answer 1

Maybe the map is null when you call onResume() ? Or perhaps the frament has no size? Generally the black screen indicates no layout or the view was not resumed correctly.
#Override
protected void onResume() {
super.onResume();
if(map != null)
mapFragment.onResume();
}