Android: Dynamically added v7 preference does not have focus on Android TV

Question

I wrote a testing app which dynamically add preference (support.v7), but the added preference does not have focus. However, dynamically added preference (v1) can have focus.

For example: (support.v7 example, no focus)

import android.support.v14.preference.PreferenceFragment;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceScreen;

public final class MySettings extends PreferenceFragment {
    private IntentFilter mIntentFilter;
    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (action.equals("android.intent.action.MYTEST")) {
                Preference pref1 = new Preference(getPreferenceManager().getContext());
                pref1.setTitle("First");
                getPreferenceScreen().addPreference(pref1);
            }
        }
    };

    @Override
    public void onResume() {
        super.onResume();
        addPreferencesFromResource(R.xml.my_settings); // only contains a PreferenceScreen
        mIntentFilter = new IntentFilter("android.intent.action.MYTEST");
        getActivity().registerReceiver(mReceiver, mIntentFilter);
    }
}

However, the following can have focus (v1 example, have focus)

import android.preference.PreferenceFragment;
import android.preference.Preference;
import android.preference.PreferenceScreen;

public final class MySettings extends PreferenceFragment {
    private IntentFilter mIntentFilter;
    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (action.equals("android.intent.action.MYTEST")) {
                Preference pref1 = new Preference(getContext());
                pref1.setTitle("First");
                getPreferenceScreen().addPreference(pref1);
            }
        }
    };

    @Override
    public void onResume() {
        super.onResume();
        addPreferencesFromResource(R.xml.my_settings); // only contains a PreferenceScreen
        mIntentFilter = new IntentFilter("android.intent.action.MYTEST");
        getActivity().registerReceiver(mReceiver, mIntentFilter);
    }
}

But I need to use supporting library v7 due to porting task. How can I have focus using supporting library v7?

Thanks.

Answer 1

In the onResume of your PreferenceFragment or PreferenceFragmentCompat, set a focus on the listview used to show the preferences:

@Override
public void onResume() {
    super.onResume();
    // only contains a PreferenceScreen
    addPreferencesFromResource(R.xml.my_settings); 
    mIntentFilter = new IntentFilter("android.intent.action.MYTEST");
    getActivity().registerReceiver(mReceiver, mIntentFilter);

    // request focus on the listview
    getListView().requestFocus();
}

more info here :

• getListView doc for PreferenceFragment
• getListView doc for PreferenceFragmentCompat