How to add android.support.v4.app.ListFragment to activity?

Question

I have MainActivity with layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">
    <FrameLayout
        android:id="@+id/fragment2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1">
    </FrameLayout>
</LinearLayout>

In the MainActivity.onCreate() method I try to add a ListFragment:

MyFragment themesFragment = new MyFragment();
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.add(R.id.fragment2, themesFragment);
        ft.commit();

But then I get the following error:

Error:(19, 11) error: no suitable method found for add(int,MyFragment)
method FragmentTransaction.add(Fragment,String) is not applicable
(argument mismatch; int cannot be converted to Fragment)
method FragmentTransaction.add(int,Fragment) is not applicable
(argument mismatch; MyFragment cannot be converted to Fragment)

If I use android.app.ListFragment adding succeeds, but I have problem with CursorLoader.

What is best way load data from a database into a fragment, while adding and removing from activity by clicking a button?

Answer 1

if you use android.support.v4.ListFragment, you must use getSupportFragmentManager() instead of getFragmentManager()

Your activity must extends FragmentActivity