/* * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * * 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 net.micode.notes.ui;////引入ui包 import android.accounts.Account;//引入ui包//该类主要实现的是对背景颜色和字体大小的数据储存， 继承了PreferenceActivity主要功能为对系统信息和配置进行自动保存的Activity import android.accounts.AccountManager; import android.app.ActionBar; import android.app.AlertDialog; import android.content.BroadcastReceiver; import android.content.ContentValues; import android.content.Context;//文本 import android.content.DialogInterface;//对话 import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.Preference; import android.preference.Preference.OnPreferenceClickListener; import android.preference.PreferenceActivity; import android.preference.PreferenceCategory;//继承PreferenceActivity，主要功能为对系统配置进行自动保存以及实现用户同步的操作 import android.text.TextUtils; import android.text.format.DateFormat; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button;//按钮 import android.widget.TextView; import android.widget.Toast; import net.micode.notes.R; import net.micode.notes.data.Notes;//引入R包 import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.gtask.remote.GTaskSyncService; public class NotesPreferenceActivity extends PreferenceActivity {//类：NotesPreferenceActivity，在小米便签中主要实现的是对背景颜色和字体大小的数据储存。 继承了PreferenceActivity主要功能为对系统信息和配置进行自动保存的Activity public static final String PREFERENCE_NAME = "notes_preferences";//NotesPreferenceActivity，在小米便签中主要实现的是对背景颜色和字体大小的数据储存。继承了PreferenceActivity主要功能为对系统信息和配置进行自动保存的Activity public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name";//同步账户名 public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time";//最后同步时间 public static final String PREFERENCE_SET_BG_COLOR_KEY = "pref_key_bg_random_appear";//设置颜色按键 private static final String PREFERENCE_SYNC_ACCOUNT_KEY = "pref_sync_account_key";//账户同步密码 private static final String AUTHORITIES_FILTER_KEY = "authorities";//本地密码 private PreferenceCategory mAccountCategory; private GTaskReceiver mReceiver; private Account[] mOriAccounts; private boolean mHasAddedAccount; @Override protected void onCreate(Bundle icicle) {//新建Activity super.onCreate(icicle);//执行父类创建函数 /* using the app icon for navigation */ getActionBar().setDisplayHomeAsUpEnabled(true);//给左上角图标的左边加上一个返回的图标 addPreferencesFromResource(R.xml.preferences);//给左上角图标的左边加上一个返回的图标 mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY);//添加xml来源并显示 xml mReceiver = new GTaskReceiver();//根据同步账户关键码来初始化分组 IntentFilter filter = new IntentFilter();//设置过滤项 filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME); registerReceiver(mReceiver, filter); mOriAccounts = null; View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null); getListView().addHeaderView(header, null, true); } @Override protected void onResume() {//函数功能：activity交互功能的实现，用于接受用户的输入 super.onResume();//函数功能：activity交互功能的实现，用于接受用户的输入 // need to set sync account automatically if user has added a new // account if (mHasAddedAccount) {//代码块：若用户新加了账户则自动设置同步账户 Account[] accounts = getGoogleAccounts();//获取google账户 if (mOriAccounts != null && accounts.length > mOriAccounts.length) { for (Account accountNew : accounts) {//遍历账户 boolean found = false;//更新账户 for (Account accountOld : mOriAccounts) {//循环判断当前账户列表中的账户是否与新建账户名相同 if (TextUtils.equals(accountOld.name, accountNew.name)) {//若没找到旧账户则只设置新账户为同步账户 found = true;// 语句：更新账户 break; } } if (!found) { setSyncAccount(accountNew.name); break; } } } } refreshUI(); } @Override protected void onDestroy() {//销毁Activity if (mReceiver != null) {//销毁接收器 unregisterReceiver(mReceiver);//语句：注销接收器 } super.onDestroy();//语句：执行销毁动作 } private void loadAccountPreference() {//设置账户信息 mAccountCategory.removeAll();//移除所有分组 Preference accountPref = new Preference(this);//销毁所有的分组 final String defaultAccount = getSyncAccountName(this);//建立首选项 accountPref.setTitle(getString(R.string.preferences_account_title));//首选项的大小标题 accountPref.setSummary(getString(R.string.preferences_account_summary));//类似title的副标题 accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() { public boolean onPreferenceClick(Preference preference) {//设置首选项的大标题和小标题 if (!GTaskSyncService.isSyncing()) {//不处于同步状态 if (TextUtils.isEmpty(defaultAccount)) { // the first time to set account showSelectAccountAlertDialog(); } else {//代码块：若是账户已经存在，则显示修改对话框并进行修改操作 // if the account has already been set, we need to promp // user about the risk showChangeAccountConfirmAlertDialog();//已有账户则显示确认对话框 } } else {//代码块：若在没有同步的情况下，则在toast中显示不能修改 Toast.makeText(NotesPreferenceActivity.this,//若正在同步则显示不能修改账户 R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT) .show(); } return true; } }); mAccountCategory.addPreference(accountPref);//语句：根据新建首选项编辑新的账户分组 } private void loadSyncButton() {//设置同步按键和最近同步时间 Button syncButton = (Button) findViewById(R.id.preference_sync_button); TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview);//获取同步按钮控件和最终同步时间的的窗口 // set button state if (GTaskSyncService.isSyncing()) { syncButton.setText(getString(R.string.preferences_button_sync_cancel)); syncButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) {//设置点击监听器 GTaskSyncService.cancelSync(NotesPreferenceActivity.this); } }); } else {//非同步状态下按键显示“立即同步”，设置相关监听器 syncButton.setText(getString(R.string.preferences_button_sync_immediately));//若是不同步则设置按钮显示的文本为“立即同步”以及对应监听器 syncButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) {//若是不同步则设置按钮显示的文本为“立即同步”以及对应监听器 GTaskSyncService.startSync(NotesPreferenceActivity.this);//点击行为 } }); } syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this)));//语句：若是不同步则设置按钮显示的文本为“立即同步”以及对应监听器 设置按键可用还是不可用 // set last sync time if (GTaskSyncService.isSyncing()) {//设置按键的可用性 lastSyncTimeView.setText(GTaskSyncService.getProgressString()); lastSyncTimeView.setVisibility(View.VISIBLE); } else {//根据当前同步服务器设置时间显示框的文本以及可见性 long lastSyncTime = getLastSyncTime(this); if (lastSyncTime != 0) {//设置一些显示的内容 lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time,//非同步时，若最近同步时间不为0则显示最近同步时间 DateFormat.format(getString(R.string.preferences_last_sync_time_format), lastSyncTime))); lastSyncTimeView.setVisibility(View.VISIBLE); } else {//根据最后同步时间的信息来编辑时间显示框的文本内容和可见性 lastSyncTimeView.setVisibility(View.GONE);//最近同步时间为空设置同步时间不可见 } } } private void refreshUI() {// 函数:刷新标签界面 loadAccountPreference(); loadSyncButton(); } private void showSelectAccountAlertDialog() {//函数：显示账户选择的对话框并进行账户的设置 AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);//语句：创建一个新的对话框 View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null); TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title); titleTextView.setText(getString(R.string.preferences_dialog_select_account_title)); TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);//文本试图设置 subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips)); dialogBuilder.setCustomTitle(titleView);//代码块：设置标题以及子标题的内容 dialogBuilder.setPositiveButton(null, null); Account[] accounts = getGoogleAccounts();//获得谷歌账户 String defAccount = getSyncAccountName(this); mOriAccounts = accounts;//语句：获取同步账户信息 mHasAddedAccount = false; if (accounts.length > 0) {//语句：若账户不为空 CharSequence[] items = new CharSequence[accounts.length]; final CharSequence[] itemMapping = items; int checkedItem = -1; int index = 0; for (Account account : accounts) {//通过循环检查账户列表 if (TextUtils.equals(account.name, defAccount)) { checkedItem = index; } items[index++] = account.name; } dialogBuilder.setSingleChoiceItems(items, checkedItem,//语句：在对话框建立一个单选的复选框 new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { setSyncAccount(itemMapping[which].toString());//点击则开始设置同步账户 dialog.dismiss();//语句：取消对话框 refreshUI();//刷新界面 } }); } View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);//视图，添加新的账户 dialogBuilder.setView(addAccountView);//语句：给新加账户对话框设置自定义样式 final AlertDialog dialog = dialogBuilder.show();//语句：显示对话框 addAccountView.setOnClickListener(new View.OnClickListener() { public void onClick(View v) {//设置监听器 mHasAddedAccount = true;//功能描述：响应点击添加账户的请求 函数实现：除了调用父类的onCreate，还有一些自己的个性化配置 参数描述： @v 视图，包括很多设置参数 Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");//语句：建立网络建立组件 intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] { "gmail-ls" }); startActivityForResult(intent, -1); dialog.dismiss(); } }); } private void showChangeAccountConfirmAlertDialog() {//刷新标签界面 AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);//语句：创建一个新的对话框 View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null); TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title); titleTextView.setText(getString(R.string.preferences_dialog_change_account_title, getSyncAccountName(this))); TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle); subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg));//语句：根据同步修改的账户信息设置标题以及子标题的内容 dialogBuilder.setCustomTitle(titleView); CharSequence[] menuItemArray = new CharSequence[] {//代码块：设置对话框的自定义标题 getString(R.string.preferences_menu_change_account), getString(R.string.preferences_menu_remove_account), getString(R.string.preferences_menu_cancel) }; dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { if (which == 0) {//语句：进入账户选择对话框 showSelectAccountAlertDialog();//显示账户选择提示对话框 } else if (which == 1) {//删除同步账户 removeSyncAccount();//语句：删除账户并且跟新便签界面 refreshUI(); } } }); dialogBuilder.show();//语句：显示对话框 } private Account[] getGoogleAccounts() {//函数：获取谷歌账户，可通过账户管理器直接获取 AccountManager accountManager = AccountManager.get(this); return accountManager.getAccountsByType("com.google"); } private void setSyncAccount(String account) {//函数：设置同步账户 if (!getSyncAccountName(this).equals(account)) {//代码块：如果该账号不在同步账号列表中 SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = settings.edit();//编辑共享首选项 if (account != null) {//语句：编辑共享的首选项 editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account); } else { editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, ""); } editor.commit(); // clean up last sync time setLastSyncTime(this, 0);// 语句：将最后同步时间清零 // clean up local gtask related info new Thread(new Runnable() { public void run() {//新线程的创建 ContentValues values = new ContentValues(); values.put(NoteColumns.GTASK_ID, ""); values.put(NoteColumns.SYNC_ID, 0); getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null); } }).start();//代码块：重置当地同步任务的信息 Toast.makeText(NotesPreferenceActivity.this,//设置一个toast提示信息，提示用户成功设置同步 getString(R.string.preferences_toast_success_set_accout, account), Toast.LENGTH_SHORT).show(); } } private void removeSyncAccount() {//函数：删除同步账户 SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);//SharedPreferences是以键值对的形式存储数据的，其使用非常简单，能够轻松的存放数据和读取数据 SharedPreferences.Editor editor = settings.edit();//语句：设置共享首选项 if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {//代码块：假如当前首选项中有账户就删除 editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME); } if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {//代码块：删除当前首选项中有账户时间 editor.remove(PREFERENCE_LAST_SYNC_TIME); } editor.commit(); // clean up local gtask related info new Thread(new Runnable() { public void run() {//新线程 ContentValues values = new ContentValues(); values.put(NoteColumns.GTASK_ID, ""); values.put(NoteColumns.SYNC_ID, 0); getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null); } }).start(); } public static String getSyncAccountName(Context context) {//函数：获取同步账户名称 通过共享的首选项里的信息直接获取 SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,//获取同步账户名称 Context.MODE_PRIVATE); return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, ""); } public static void setLastSyncTime(Context context, long time) {//设置最终同步的时间 SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = settings.edit();//语句：从共享首选项中找到相关账户并获取其编辑器 editor.putLong(PREFERENCE_LAST_SYNC_TIME, time); editor.commit();//语句：编辑最终同步时间并提交更新 } public static long getLastSyncTime(Context context) {//函数：获取最终同步时间 通过共享的首选项里的信息直接获取 SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,//通过共享，获取时间 Context.MODE_PRIVATE); return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0); } private class GTaskReceiver extends BroadcastReceiver {//函数：接受同步信息 @Override public void onReceive(Context context, Intent intent) //功能描述：响应接收广播的情况 函数实现：刷新界面，判断是否同步状态下 参数描述： @intent携带了活动的数据， @context是有关的内容 refreshUI(); if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {// 代码块：获取随广播而来的Intent中的同步服务的数据 TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);//通过获取的数据在设置系统的状态 syncStatus.setText(intent .getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG)); } } } public boolean onOptionsItemSelected(MenuItem item) {//函数：处理菜单的选项 switch (item.getItemId()) {//代码块：根据选项的id选择，这里只有一个主页 case android.R.id.home://返回主界面 Intent intent = new Intent(this, NotesListActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent);//创建活动 return true; default://代码块：在主页情况下在创建连接组件intent，发出清空的信号并开始一个相应的activity return false; } } }