Android 1.6 & Fragment & Tabhost

I'm working on upgrading an Android application (1.6 compatibility) which uses a TabHost to show 3 different tabs with nested activities. At the time I used the ActivityGroup trick

Solution 1:

The problem is that your MyActivity tries to reach out to the enclosing MainActivity by using android.R.id.tabcontent as a container id. This is not possible. Instead, MyActivity needs to have its own layout (e.g. a FrameLayout) which can be used as the parent for the Fragment. In this layout, there must exist a view that can be referenced by id.

Let's say you have a layout called activity_layout.xml which contains a FrameLayout with the id 'framelayout'. You can then modify the onCreate method in MyActivity to something like this:

@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Viewparent= getLayoutInflater().inflate(R.layout.activity_layout, null);
    setContentView(parent);

    fragmentManager = getSupportFragmentManager();
    FragmentTransactionfragmentTransaction= fragmentManager.beginTransaction();
    Fragmentfragment= MyFragment.newInstance();
    fragmentTransaction.add(R.id.framelayout, fragment, "MyFragment");
    fragmentTransaction.commit();
}

In other words, MyActivity needs to be able to work on its own. Try to make it work first, and then embed MyActivity in the MainActivity containing the TabHost.

Solution 2:

Why don't you create your own tabbar. It's verry easy to build. Just add a LinearLayout with some buttons in it and set the onClickListener to switch fragments by using the FragmentManager. The Fragment manager can be obtained from a FragmentActivity.

FragmentManagerfragmentManager= getSupportFragmentManager();

In the onClick handler you just do a transaction to the switch to the correct fragments.