OpenTracks/src/main/java/de/dennisguse/opentracks/settings/StatsSettingsActivity.java

/*
 * Copyright 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package de.dennisguse.opentracks.settings;

import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;

import de.dennisguse.opentracks.util.PreferencesUtils;
import de.dennisguse.opentracks.R;

/**
 * An activity for accessing stats settings.
 *
 * @author Jimmy Shih
 */
public class StatsSettingsActivity extends AbstractSettingsActivity {

    @Override
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        addPreferencesFromResource(R.xml.settings_statistics);

        /*
         * Note configureUnitsListPreference will trigger
         * configureRateListPreference
         */
        configUnitsListPreference();
    }

    /**
     * Configures the preferred units list preference.
     */
    private void configUnitsListPreference() {
        ListPreference listPreference = (ListPreference) findPreference(
                getString(R.string.stats_units_key));
        OnPreferenceChangeListener listener = new OnPreferenceChangeListener() {

            @Override
            public boolean onPreferenceChange(Preference pref, Object newValue) {
                boolean metricUnits = PreferencesUtils.STATS_UNITS_DEFAULT.equals(newValue);
                configRateListPreference(metricUnits);
                return true;
            }
        };
        String value = PreferencesUtils.getString(
                this, R.string.stats_units_key, PreferencesUtils.STATS_UNITS_DEFAULT);
        String[] values = getResources().getStringArray(R.array.stats_units_values);
        String[] options = getResources().getStringArray(R.array.stats_units_options);
        configureListPreference(listPreference, options, options, values, value, listener);
    }

    /**
     * Configures the preferred rate list preference.
     *
     * @param metricUnits true if metric units
     */
    private void configRateListPreference(boolean metricUnits) {
        ListPreference listPreference = (ListPreference) findPreference(
                getString(R.string.stats_rate_key));
        String value = PreferencesUtils.getString(
                this, R.string.stats_rate_key, PreferencesUtils.STATS_RATE_DEFAULT);
        String[] values = getResources().getStringArray(R.array.stats_rate_values);
        String[] options = getResources().getStringArray(
                metricUnits ? R.array.stats_rate_metric_options : R.array.stats_rate_imperial_options);
        configureListPreference(listPreference, options, options, values, value, null);
    }
}