Android preference-headers extra parameter

Question

I am building preference activity using headers. In the documentation, I saw that extra parameters can be specified per each header entry. In the code, I'd like to access those extra values when building the header list within the settings activity as follows. Note that I am doing it from the activity which overloads onBuildHeaders and not from the header fragment.

if (header.extras != null && header.extras.containsKey("someKey")) {
    ...
}

However, the extras parameter is always null. Is there a way for force it to be read in?

Answer 1

Add your extras in your header like so:

<header android:title="Display" >
  <extra
    android:name="separator"
    android:value="true" />
</header>

And then retrieve the value with the following:

    boolean isSeparator = false;
    Bundle extras = header.fragmentArguments;
    if (extras != null)
    {
      isSeparator = extras.containsKey("separator");
    }

Note that you want to use header.fragmentArguments instead of the .extras field.