Java tutorial
/** * Copyright 2016 Tautvydas Andrikys * * 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 com.esminis.server.library.activity; import android.content.Context; import android.os.Bundle; import android.os.Parcelable; import android.preference.CheckBoxPreference; import android.preference.Preference; import android.preference.PreferenceFragment; import android.preference.PreferenceScreen; import android.support.annotation.NonNull; import android.support.annotation.StringRes; import android.support.v4.content.ContextCompat; import android.util.TypedValue; import android.view.ContextThemeWrapper; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.esminis.server.library.preferences.Preferences; import com.esminis.server.library.service.server.ServerControl; import com.esminis.server.library.application.LibraryApplication; import com.esminis.server.library.R; import java.lang.reflect.Field; import java.util.HashMap; import java.util.Map; import javax.inject.Inject; public class DrawerFragment extends PreferenceFragment { @Inject protected Preferences preferences; @Inject protected ServerControl serverControl; @Inject public DrawerFragment() { super(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Context context = getActivity(); ((LibraryApplication) context.getApplicationContext()).getComponent().inject(this); PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(context); setPreferenceScreen(screen); context = new ContextThemeWrapper(getActivity(), R.style.Preference); setupPreferences(screen, context); setupPreferencesValues(screen, context); } protected void setupPreferences(PreferenceScreen screen, Context context) { final CheckBoxPreference preference = createPreferenceCheckbox(context, Preferences.START_ON_BOOT, false, R.string.server_start_on_boot_title, R.string.server_start_on_boot_summary); preference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() { @Override public boolean onPreferenceChange(Preference preference, Object newValue) { onPreferenceChanged(preference, newValue); return true; } }); screen.addPreference(preference); screen.addPreference( requestStatusOnChange(createPreferenceCheckbox(context, Preferences.SHOW_NOTIFICATION_SERVER, true, R.string.show_notification_server, R.string.show_notification_server_summary))); } protected CheckBoxPreference createPreferenceCheckbox(Context context, String key, boolean defaultValue, @StringRes int title, @StringRes int summary) { final CheckBoxPreference preference = new CheckBoxPreference(context); preference.setTitle(title); preference.setDefaultValue(defaultValue); preference.setSummary(summary); preference.setKey(key); return preference; } protected void setupPreferencesValues(PreferenceScreen screen, Context context) { final Map<String, Boolean> values = preferences.getBooleans(context); final Map<String, Boolean> valuesSave = new HashMap<>(); for (int i = 0; i < screen.getPreferenceCount(); i++) { Preference preference = screen.getPreference(i); if (preference instanceof CheckBoxPreference) { if (values.containsKey(preference.getKey())) { ((CheckBoxPreference) preference).setChecked(values.get(preference.getKey())); } else { valuesSave.put(preference.getKey(), ((CheckBoxPreference) preference).isChecked()); } } } preferences.setBooleans(context, valuesSave); } @Override public void onActivityCreated(Bundle savedInstanceState) { if (savedInstanceState != null) { Bundle bundle = savedInstanceState.getBundle("android:preferences"); if (bundle != null) { try { Parcelable parcelable = bundle.getParcelable("modules"); if (parcelable != null) { Field field = parcelable.getClass().getDeclaredField("dialogBundle"); field.setAccessible(true); Bundle bundleTemp = (Bundle) field.get(parcelable); if (bundleTemp != null) { bundleTemp.setClassLoader(getClass().getClassLoader()); } } } catch (Throwable ignored) { } } } super.onActivityCreated(savedInstanceState); if (getView() == null) { return; } View view = getView().findViewById(android.R.id.list); if (view == null) { return; } TypedValue attribute = new TypedValue(); getActivity().getTheme().resolveAttribute(android.R.attr.windowBackground, attribute, true); if (attribute.resourceId > 0) { view.setBackgroundColor(ContextCompat.getColor(getActivity(), attribute.resourceId)); } } private void onPreferenceChanged(Preference preference, Object newValueObject) { if (preference == null || !(preference instanceof CheckBoxPreference)) { return; } Context context = getActivity(); if (context != null) { preferences.set(context, preference.getKey(), (Boolean) newValueObject); } } private Preference requestStatusOnChange(Preference preference) { if (preference == null) { return null; } preference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() { @Override public boolean onPreferenceChange(Preference preference, Object newValue) { onPreferenceChanged(preference, newValue); return true; } }); preference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() { @Override public boolean onPreferenceClick(Preference preference) { serverControl.requestStatus(null); return true; } }); return preference; } protected Preference restartOnChange(Preference preference) { if (preference == null) { return null; } preference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() { @Override public boolean onPreferenceChange(Preference preference, Object newValue) { onPreferenceChanged(preference, newValue); serverControl.requestRestartIfRunning(null); return true; } }); return preference; } @Override public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle state) { View view = super.onCreateView(inflater, container, state); if (view != null) { View viewList = view.findViewById(android.R.id.list); if (viewList != null) { viewList.setPadding(0, 0, 0, 0); } } return view; } }