[android help] Fragment with Map crashes app when back button is pressed or when orientation changes

I have an Activity that loads 2 tabs in the ActionBar. Tab 1 loads a Fragment that will will inflate a WebView, while Tab 2 loads a Fragment with a map. Initially, I have the problem of changing tabs that causes the app to crash. I have followed the instructions here and implemented onDestroyView().

The problem now is that if I press the back button from Tab 1 (WebView), it exits the Activity properly. But if I do it on Tab 2 (map), the app crashes. The exact same scenario applies to when I change the orientation. I am convinced that it has something to do with the onDestroyView(), but I am not sure what it is.

I have even attempted to Override the back button, but nothing works.

Here is my code to provide some context:

The Activity Class:

public class MyActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //Displaying the tabs by calling ActionBar
    ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    //Details Tab
    String label1 = getResources().getString(R.string.details);
    Tab tab = actionBar.newTab();
    tab.setText(label1);
    TabListener t1 = new TabListener(this, label1, DetailsFragment.class);
    tab.setTabListener(t1);
    actionBar.addTab(tab);

    //Map Tab
    String label2 = getResources().getString(R.string.map);
    tab = actionBar.newTab();
    tab.setText(label2);
    TabListener t2 = new TabListener(this, label2, MapFragment.class);
    tab.setTabListener(t2);
    actionBar.addTab(tab);
}

private class TabListener implements ActionBar.TabListener {
    private Fragment mFragment;
    private final Activity mActivity;
    private final String mTag;
    private final Class mClass;

    /**
     * Constructor used each time a new tab is created.
     * 
     * @param activity
     *            The host Activity, used to instantiate the fragment
     * @param tag
     *            The identifier tag for the fragment
     * @param clz
     *            The fragment's Class, used to instantiate the fragment
     */
    public TabListener(Activity activity, String tag, Class clz) {
        mActivity = activity;
        mTag = tag;
        mClass = clz;
    }

    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        // Check if the fragment is already initialized
        if (mFragment == null) {
            // If not, instantiate and add it to the activity
            mFragment = Fragment.instantiate(mActivity, mClass.getName());
            ft.add(android.R.id.content, mFragment, mTag);
        } else {
            // If it exists, simply attach it in order to show it
            ft.attach(mFragment);

        }
    }

    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        if (mFragment != null) {
            // Detach the fragment, because another one is being attached
            ft.detach(mFragment);
        }
    }

    public void onTabReselected(Tab tab, FragmentTransaction ft) {
        // User selected the already selected tab. Usually do nothing.
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
} }

DetailsFragment:

public class DetailsFragment extends Fragment {


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View v = inflater.inflate(R.layout.morning, container, false);
    WebView webview = (WebView) v.findViewById(R.id.details);
    webview.loadUrl("file:///android_asset/pools/details.html");
    return v;
} }

MapFragment:

public class MapFragment extends Fragment {

static final LatLng mapLatLng = new LatLng("some numbers", "some numbers");
private GoogleMap map;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View v = inflater.inflate(R.layout.map, container, false);
    map = ((MapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();
    Marker amksc = map.addMarker(new MarkerOptions().position(mapLatLng).title("Map"));

    map.moveCamera(CameraUpdateFactory.newLatLngZoom(mapLatLng, 18)); 
    return v;
}


@Override
public void onDestroyView() {
    super.onDestroyView();
    MapFragment destroyMe = (MapFragment)getFragmentManager().findFragmentById(R.id.map);
    if (destroyMe != null) {
        getFragmentManager().beginTransaction().remove(destroyMe).commit();
    }
} }

Thanks for reading such a long post. Any help is greatly appreciated. I will be away for awhile without my laptop (15 days to be exact), so I may not be able to respond and test out your answer, but rest assured that I will =)

Thanks in advance!

.

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