Access Fragments View from Outside OnCreateView Method

Question

Have searched around for this but everyone of them is for the onCreateView() method where you can access the Fragments view via the inflater.

public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle saved)
{
    super.onCreateView(inflater, group, saved);
    View view = inflater.inflate(R.layout.photosfrag, group, false);

What I want to know is how to do this dynamically. For example say I am using an activity to show a fragment and call a method in the fragment such as:

public void setTitleText(String title) {
    TextView nameView = (TextView)getView().findViewById(R.id.titleTxtView);
    nameView.setText(title);
}

Just because the fragment is already created and it would be a way of dynamically changing it.

Any help would be grand. I may doing it all wrong.

EDIT

Here is the crash log

06-25 17:31:37.343: D/AndroidRuntime(1009): Shutting down VM
06-25 17:31:37.353: W/dalvikvm(1009): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
06-25 17:31:37.383: E/AndroidRuntime(1009): FATAL EXCEPTION: main
06-25 17:31:37.383: E/AndroidRuntime(1009): java.lang.NullPointerException
06-25 17:31:37.383: E/AndroidRuntime(1009):     at com.corecoders.stuart.MainActivity.onTrackSelected(MainActivity.java:81)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at com.corecoders.stuart.HistoryFragment.onListItemClick(HistoryFragment.java:51)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.app.ListFragment$2.onItemClick(ListFragment.java:160)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.widget.AdapterView.performItemClick(AdapterView.java:292)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.widget.AbsListView.performItemClick(AbsListView.java:1058)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2514)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.widget.AbsListView$1.run(AbsListView.java:3168)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.os.Handler.handleCallback(Handler.java:605)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.os.Handler.dispatchMessage(Handler.java:92)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.os.Looper.loop(Looper.java:137)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at android.app.ActivityThread.main(ActivityThread.java:4424)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at java.lang.reflect.Method.invokeNative(Native Method)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at java.lang.reflect.Method.invoke(Method.java:511)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-25 17:31:37.383: E/AndroidRuntime(1009):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

The way you are doing it should just work. The crash log shows us that the NPE is unrelated to the way the fragment updates its widgets.

Answer 2

Do this instead:

//Define reference globally
TextView nameView;

public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle saved){
    super.onCreateView(inflater, group, saved);
    View view = inflater.inflate(R.layout.photosfrag, group, false);
    //do this here!
    nameView = view.findViewByID(R.id.titleTxtView);
    ...

}

public void setTitle(String t){
    nameView.setText(t);
}

The difference is this approach does not lazy-load the TextView reference-- it loads it when the view is inflated as opposed to when it is needed.