GAPreferenceFragment.java

package com.greenaddress.greenbits.ui.preferences;

import android.content.Intent;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.view.MenuItem;

import com.greenaddress.greenbits.GaService;
import com.greenaddress.greenbits.GreenAddressApplication;

public class GAPreferenceFragment extends PreferenceFragment {
    protected GaService mService;

    @Override
    public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final GreenAddressApplication app;
        app = ((GreenAddressApplication) getActivity().getApplication());
        mService = app.mService;
    }

    private static final Preference.OnPreferenceChangeListener onPreferenceChanged = new Preference.OnPreferenceChangeListener() {
        @Override
        public boolean onPreferenceChange(final Preference preference, final Object value) {
            preference.setSummary(value.toString());
            return true;
        }
    };

    protected void bindPreferenceSummaryToValue(final Preference preference) {
        preference.setOnPreferenceChangeListener(onPreferenceChanged);
        // Trigger the listener immediately with the preference's
        // current value.
        final String currentVal = mService.cfg().getString(preference.getKey(), "");
        onPreferenceChanged.onPreferenceChange(preference, currentVal);
    }

    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            startActivity(new Intent(getActivity(), SettingsActivity.class));
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    protected <T> T find(final String preferenceName) {
        return (T) findPreference(preferenceName);
    }

    protected void removePreference(final Preference pref) {
        if (pref != null)
            getPreferenceScreen().removePreference(pref);
    }

    protected void removePreference(final String preferenceName) {
        removePreference(findPreference(preferenceName));
    }
}