package com.dmitrymalkovich.android.githubanalytics.settings;
/*
 * Copyright 2016.  Dmitry Malkovich
 *
 * 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.
 */

import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.support.annotation.IntDef;
import android.support.v7.app.ActionBar;
import android.view.MenuItem;

import com.dmitrymalkovich.android.githubanalytics.R;

import java.lang.annotation.Retention;
import java.util.List;

import static java.lang.annotation.RetentionPolicy.SOURCE;

/**
 * A {@link PreferenceActivity} that presents a set of application settings. On
 * handset devices, settings are presented as a single list. On tablets,
 * settings are split by category, with category headers shown to the left of
 * the list of settings.
 * <p>
 * See <a href="http://developer.android.com/design/patterns/settings.html">
 * Android Design: Settings</a> for design guidelines and the <a
 * href="http://developer.android.com/guide/topics/ui/settings.html">Settings
 * API Guide</a> for more information on developing a Settings UI.
 */
public class SettingsActivity extends AppCompatPreferenceActivity {

    public final static String KEY_PREF_THEME = "theme";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ThemePreferenceFragment.getTheme(this, ThemePreferenceFragment.THEME_TYPE_ACTION_BAR);
        setupActionBar();
    }

    /**
     * Set up the {@link android.app.ActionBar}, if the API is available.
     */
    private void setupActionBar() {
        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            // Show the Up button in the action bar.
            actionBar.setDisplayHomeAsUpEnabled(true);
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            finish();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public boolean onIsMultiPane() {
        return isXLargeTablet(this);
    }

    /**
     * Helper method to determine if the device has an extra-large screen. For
     * example, 10" tablets are extra-large.
     */
    private static boolean isXLargeTablet(Context context) {
        return (context.getResources().getConfiguration().screenLayout
                & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public void onBuildHeaders(List<PreferenceActivity.Header> target) {
        loadHeadersFromResource(R.xml.pref_headers, target);
    }

    /**
     * A preference value change listener that updates the preference's summary
     * to reflect its new value.
     */
    private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
        @Override
        public boolean onPreferenceChange(Preference preference, Object value) {
            String stringValue = value.toString();

            if (preference instanceof ListPreference) {
                // For list preferences, look up the correct display value in
                // the preference's 'entries' list.
                ListPreference listPreference = (ListPreference) preference;
                int index = listPreference.findIndexOfValue(stringValue);

                // Set the summary to reflect the new value.
                preference.setSummary(
                        index >= 0
                                ? listPreference.getEntries()[index]
                                : null);
            } else {
                // For all other preferences, set the summary to the value's
                // simple string representation.
                preference.setSummary(stringValue);
            }
            return true;
        }
    };

    /**
     * Binds a preference's summary to its value. More specifically, when the
     * preference's value is changed, its summary (line of text below the
     * preference title) is updated to reflect the value. The summary is also
     * immediately updated upon calling this method. The exact display format is
     * dependent on the type of preference.
     *
     * @see #sBindPreferenceSummaryToValueListener
     */
    private static void bindPreferenceSummaryToValue(Preference preference) {
        // Set the listener to watch for value changes.
        preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

        // Trigger the listener immediately with the preference's
        // current value.
        sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getString(preference.getKey(), ""));
    }

    /**
     * This method stops fragment injection in malicious applications.
     * Make sure to deny any unknown fragments here.
     */
    protected boolean isValidFragment(String fragmentName) {
        return PreferenceFragment.class.getName().equals(fragmentName)
                || ThemePreferenceFragment.class.getName().equals(fragmentName);
    }

    /**
     * This fragment shows theme preferences only. It is used when the
     * activity is showing a two-pane settings UI.
     */
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class ThemePreferenceFragment extends PreferenceFragment {

        private static final String THEME_LIGHT = "light";
        @SuppressWarnings("unused")
        private static final String THEME_DARK = "dark";

        @Retention(SOURCE)
        @IntDef({THEME_TYPE_NO_ACTION_BAR, THEME_TYPE_NO_ACTION_BAR_AND_COLORED_STATUS_BAR, THEME_TYPE_ACTION_BAR})
        public @interface THEME_TYPE {
        }

        public static final int THEME_TYPE_NO_ACTION_BAR = 0;
        public static final int THEME_TYPE_NO_ACTION_BAR_AND_COLORED_STATUS_BAR = 1;
        public static final int THEME_TYPE_ACTION_BAR = 2;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_header_theme);
            setHasOptionsMenu(true);

            // Bind the summaries of EditText/List/Dialog/Ringtone preferences
            // to their values. When their values change, their summaries are
            // updated to reflect the new value, per the Android Design
            // guidelines.
            bindPreferenceSummaryToValue(findPreference(KEY_PREF_THEME));
        }

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

        public static boolean isLight(Context context) {
            SharedPreferences preference = PreferenceManager
                    .getDefaultSharedPreferences(context);
            return preference.getString(KEY_PREF_THEME, THEME_LIGHT).equals(THEME_LIGHT);
        }

        public static int getTheme(Context context, @THEME_TYPE int themeType) {
            switch (themeType) {
                case THEME_TYPE_NO_ACTION_BAR: {
                    if (isLight(context)) {
                        return R.style.AppTheme;
                    } else {
                        return R.style.AppTheme_Dark;
                    }
                }
                case THEME_TYPE_ACTION_BAR: {
                    if (isLight(context)) {
                        return R.style.AppTheme_Settings;
                    } else {
                        return R.style.AppTheme_Dark_Settings;
                    }
                }
                default:
                case THEME_TYPE_NO_ACTION_BAR_AND_COLORED_STATUS_BAR: {
                    if (isLight(context)) {
                        return R.style.AppTheme_ColoredStatusBar;
                    } else {
                        return R.style.AppTheme_Dark_ColoredStatusBar;
                    }
                }
            }
        }
    }
}


@@ -8275,21 +8275,20 @@
 , THEME_
-LIGHT
+DARK
 ).equals

Fix issues with default theme