Setting a subtitle on my Toolbar from a fragment

Question

I am having some trouble setting the sub-title in my Toolbar from my fragment. I keep getting a Null Pointer Exception at the setSubTitle.

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Answer 1

You Can Create One Custom Layout For This And Then use in onCreateView method.

private ActionBar actionBar;

OnCreateView method:

actionBar = getActivity().getActionBar();
if (actionBar != null) {
    actionBar.setCustomView(R.layout.actionbar_inner_custom_view);
    actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
}

Answer 2

Declare a variable ActionBar toolbar and use it this way:

toolbar=((AppCompatActivity) getActivity()).getSupportActionBar();

toolbar.setHomeAsUpIndicator(R.drawable.ic_arrow_left);
toolbar.setTitle("Detalhes");

Answer 3

To use the Toolbar and the Appcompat 21, you have to use an AppCompatActivity and use:

((AppCompatActivity) getActivity()).getSupportActionBar().setSubtitle("About");

Answer 4

instead of calling getActivity() get the activity reference from the onAttach() lifecycle method of Fragment.

if you are using sherlock actionbar then call getSherlock().getActionBar()