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@ -49,6 +49,7 @@ import net.micode.notes.gtask.remote.GTaskSyncService;
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public class NotesPreferenceActivity extends PreferenceActivity {
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//定义常量键，用于引用特定的偏好设置
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public static final String PREFERENCE_NAME = "notes_preferences";
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public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name";
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@ -61,29 +62,33 @@ public class NotesPreferenceActivity extends PreferenceActivity {
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private static final String AUTHORITIES_FILTER_KEY = "authorities";
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//成员变量，用于管理偏好设置项
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private PreferenceCategory mAccountCategory;
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//广播接收器，用于接收相关相同操作广播通知
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private GTaskReceiver mReceiver;
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//存储原始的Google账号数组，用于比较之后是否有变化
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private Account[] mOriAccounts;
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//标志变量，记录是否添加了新账户
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private boolean mHasAddedAccount;
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@Override
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protected void onCreate(Bundle icicle) {
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super.onCreate(icicle);
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/* using the app icon for navigation */
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//启用向上导航使用应用程序图标
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getActionBar().setDisplayHomeAsUpEnabled(true);
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//从Preferences.xml资源文件添加偏好设置项到这个活动
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addPreferencesFromResource(R.xml.preferences);
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//通过键找到偏好设置分类，准备后续添加账户选项
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mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY);
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//实例化广播接收器并注册，以便再同步服务发送广播时接收
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mReceiver = new GTaskReceiver();
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IntentFilter filter = new IntentFilter();
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filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME);
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registerReceiver(mReceiver, filter);
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//初始化账户数组为null
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mOriAccounts = null;
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//为设置列表添加表头View
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View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null);
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getListView().addHeaderView(header, null, true);
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}
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@ -92,8 +97,8 @@ public class NotesPreferenceActivity extends PreferenceActivity {
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protected void onResume() {
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super.onResume();
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// need to set sync account automatically if user has added a new
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// account
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//用户添加了新账户，自动设置同步账户
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//通过比较原始账号和当前账户，确定新账户，并设置同步
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if (mHasAddedAccount) {
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Account[] accounts = getGoogleAccounts();
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if (mOriAccounts != null && accounts.length > mOriAccounts.length) {
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@ -112,12 +117,13 @@ public class NotesPreferenceActivity extends PreferenceActivity {
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}
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}
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}
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//刷新UI界面，可能涉及到帐号显示的更新
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refreshUI();
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}
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@Override
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protected void onDestroy() {
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//注销广播接收器
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if (mReceiver != null) {
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unregisterReceiver(mReceiver);
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}
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@ -125,8 +131,10 @@ public class NotesPreferenceActivity extends PreferenceActivity {
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}
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private void loadAccountPreference() {
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//清空账户分类列表，然后重新添加账户偏好设置项
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mAccountCategory.removeAll();
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//创建一个账户偏好项，配置标题、概要、并设置点击监听
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//如果正在同步过程中则无法更改账户
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Preference accountPref = new Preference(this);
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final String defaultAccount = getSyncAccountName(this);
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accountPref.setTitle(getString(R.string.preferences_account_title));
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@ -154,117 +162,150 @@ public class NotesPreferenceActivity extends PreferenceActivity {
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mAccountCategory.addPreference(accountPref);
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}
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//用于初始化并设置同步按钮的状态和功能的私有方法
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private void loadSyncButton() {
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// 通过 ID 查找同步按钮，它是一个 Button 对象
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Button syncButton = (Button) findViewById(R.id.preference_sync_button);
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// 通过 ID 查找表示上次同步时间的 TextView 对象
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TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
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// set button state
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//检查是否当前正在同步中，根据同步状态来设置按钮的文本和点击事件
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if (GTaskSyncService.isSyncing()) {
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// 如果正在同步，设置按钮文本为“取消同步”并添加取消同步的点击事件
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syncButton.setText(getString(R.string.preferences_button_sync_cancel));
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syncButton.setOnClickListener(new View.OnClickListener() {
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public void onClick(View v) {
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// 当按钮被点击时，取消同步
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GTaskSyncService.cancelSync(NotesPreferenceActivity.this);
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}
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});
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} else {
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// 如果不在同步，设置按钮文本为“立即同步”并添加启动同步的点击事件
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syncButton.setText(getString(R.string.preferences_button_sync_immediately));
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syncButton.setOnClickListener(new View.OnClickListener() {
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public void onClick(View v) {
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//当按钮被点击时，启动同步
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GTaskSyncService.startSync(NotesPreferenceActivity.this);
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}
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});
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}
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// 设置按钮的可用性，如果没有设置同步账户名称则按钮不可用
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syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this)));
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// set last sync time
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// 根据同步情况设置同步状态文本和其可见性
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if (GTaskSyncService.isSyncing()) {
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//如果正在同步，展示当前同步进度
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lastSyncTimeView.setText(GTaskSyncService.getProgressString());
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lastSyncTimeView.setVisibility(View.VISIBLE);
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} else {
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//// 如果不在同步，获取并展示上次同步的时间
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long lastSyncTime = getLastSyncTime(this);
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if (lastSyncTime != 0) {
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//如果有上次同步时间，格式化并展示这个时间
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lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time,
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DateFormat.format(getString(R.string.preferences_last_sync_time_format),
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lastSyncTime)));
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lastSyncTimeView.setVisibility(View.VISIBLE);
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} else {
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// 如果没有上次同步时间，则隐藏这个视图
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lastSyncTimeView.setVisibility(View.GONE);
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}
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}
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}
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// 用来刷新界面的私有方法，可能是在操作后调用以更新用户界面状态
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private void refreshUI() {
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// 加载账户相关设置
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loadAccountPreference();
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// 重新加载并设置同步按钮的状态和功能
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loadSyncButton();
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}
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// 显示选择账户的对话框的私有方法
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private void showSelectAccountAlertDialog() {
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AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
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// 加载并设置对话框标题的布局
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View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
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TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
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// 设置标题文本
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titleTextView.setText(getString(R.string.preferences_dialog_select_account_title));
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TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
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// 设置子标题文本
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subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips));
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// 对话框设置自定义标题布局
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dialogBuilder.setCustomTitle(titleView);
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// 设置了确定按钮，但没有事件，这可能意味着默认行为就是关闭对话框
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dialogBuilder.setPositiveButton(null, null);
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//获取当前设备上的 Google 账户列表
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Account[] accounts = getGoogleAccounts();
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// 获取当前已经设置的同步账户名称
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String defAccount = getSyncAccountName(this);
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// 存储初始账户的列表，这在此段代码中未使用，可能是类成员变量用于其他地方
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mOriAccounts = accounts;
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// 设置一个标记，表示是否添加了新账户，同样这是类成员变量
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mHasAddedAccount = false;
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// 如果存在账户，设置账户列表和单选按钮以供选择
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if (accounts.length > 0) {
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CharSequence[] items = new CharSequence[accounts.length];
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final CharSequence[] itemMapping = items;
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int checkedItem = -1;
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int index = 0;
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for (Account account : accounts) {
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// 如果账户是默认账户，记录当前选中位置
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if (TextUtils.equals(account.name, defAccount)) {
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checkedItem = index;
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}
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// 填充账户名到列表中
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items[index++] = account.name;
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}
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// 创建一个单选列表对话框
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dialogBuilder.setSingleChoiceItems(items, checkedItem,
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new DialogInterface.OnClickListener() {
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public void onClick(DialogInterface dialog, int which) {
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// 当用户选择一个账户时，设置该账户为同步账户，并刷新UI
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setSyncAccount(itemMapping[which].toString());
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dialog.dismiss();
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refreshUI();
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}
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});
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}
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// 加载并设置“添加账户”的视图
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View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);
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dialogBuilder.setView(addAccountView);
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// 显示对话框
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final AlertDialog dialog = dialogBuilder.show();
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// 给“添加账户”视图添加点击事件，用来打开系统的添加账户页面
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addAccountView.setOnClickListener(new View.OnClickListener() {
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public void onClick(View v) {
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// 设置标记表示已添加账户，并且开始添加账户的活动
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mHasAddedAccount = true;
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Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
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intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] {
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"gmail-ls"
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});
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// 启动活动，请求码设置为-1，可能表示这个启动是特殊的或者不需要处理返回结果
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startActivityForResult(intent, -1);
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// 关闭当前的对话框
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dialog.dismiss();
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}
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});
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}
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// 显示更改账户确认对话框的私有方法。
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private void showChangeAccountConfirmAlertDialog() {
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AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
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// 加载并设置对话框标题布局
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View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
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TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
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// 设置标题文本为变更账户的提示，包括当前账户名称
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titleTextView.setText(getString(R.string.preferences_dialog_change_account_title,
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getSyncAccountName(this)));
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TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
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// 设置子标题文本为更改账户的警告信息
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subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg));
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// 对话框设置自定义标题布局
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dialogBuilder.setCustomTitle(titleView);
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// 设置对话框的选项列表，包括“更改账户”、“移除账户”和“取消”
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CharSequence[] menuItemArray = new CharSequence[] {
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getString(R.string.preferences_menu_change_account),
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getString(R.string.preferences_menu_remove_account),
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@ -272,100 +313,138 @@ public class NotesPreferenceActivity extends PreferenceActivity {
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};
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dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
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public void onClick(DialogInterface dialog, int which) {
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// 当用户在列表中选择选项时，根据选择执行相应操作
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if (which == 0) {
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// 如果选择“更改账户”，显示选择账户的对话框
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showSelectAccountAlertDialog();
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} else if (which == 1) {
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//如果选择“移除账户”，移除同步账户并刷新UI
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removeSyncAccount();
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refreshUI();
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}
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// 没有必要处理取消选项，因为点击会自动关闭对话框
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}
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});
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// 显示对话框
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dialogBuilder.show();
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}
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// 获取设备中所有Google账户的数组
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private Account[] getGoogleAccounts() {
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// 通过AccountManager获取账户管理实例
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AccountManager accountManager = AccountManager.get(this);
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//调用getAccountsByType方法获取类型为"com.google"的所有账户，即Google账户
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return accountManager.getAccountsByType("com.google");
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}
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// 设定或改变同步账号
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private void setSyncAccount(String account) {
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// 如果当前同步账号不是用户选定的账号
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if (!getSyncAccountName(this).equals(account)) {
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// 获取SharedPreferences的实例来存储偏好设置
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SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
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//创建一个SharedPreferences.Editor进行编辑
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SharedPreferences.Editor editor = settings.edit();
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//如果传入账号不是null，将其存储到SharedPreferences
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if (account != null) {
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editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account);
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} else {
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// 如果是null则存储空字符串""
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editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
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}
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// 将更改提交到SharedPreferences
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editor.commit();
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// clean up last sync time
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// 将最后同步时间设置为0（清空）
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setLastSyncTime(this, 0);
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// clean up local gtask related info
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// 在新线程中清空与同步相关的本地信息
|
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|
new Thread(new Runnable() {
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|
public void run() {
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|
//创建ContentValues以存储需要更新的值
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ContentValues values = new ContentValues();
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values.put(NoteColumns.GTASK_ID, "");
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values.put(NoteColumns.SYNC_ID, 0);
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values.put(NoteColumns.GTASK_ID, ""); // 清空GTASK_ID
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values.put(NoteColumns.SYNC_ID, 0); // 设置SYNC_ID为0
|
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|
// 调用ContentResolver以更新数据库中的信息
|
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|
|
getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
|
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|
|
}
|
|
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|
|
}).start();
|
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|
|
// 显示提示信息，告知用户同步账号设置成功
|
|
|
|
|
Toast.makeText(NotesPreferenceActivity.this,
|
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|
|
getString(R.string.preferences_toast_success_set_accout, account),
|
|
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|
|
Toast.LENGTH_SHORT).show();
|
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|
|
|
}
|
|
|
|
|
}
|
|
|
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|
|
// 移除同步账号
|
|
|
|
|
private void removeSyncAccount() {
|
|
|
|
|
// 获取SharedPreferences的实例来存储偏好设置
|
|
|
|
|
SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
|
|
|
|
|
// 创建一个SharedPreferences.Editor进行编辑
|
|
|
|
|
SharedPreferences.Editor editor = settings.edit();
|
|
|
|
|
// 如果存在同步账号的设置项，将其删除
|
|
|
|
|
if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
|
|
|
|
|
editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME);
|
|
|
|
|
}
|
|
|
|
|
// 如果存在最后同步时间的设置项，将其删除
|
|
|
|
|
if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {
|
|
|
|
|
editor.remove(PREFERENCE_LAST_SYNC_TIME);
|
|
|
|
|
}
|
|
|
|
|
// 将更改提交到SharedPreferences
|
|
|
|
|
editor.commit();
|
|
|
|
|
|
|
|
|
|
// clean up local gtask related info
|
|
|
|
|
// 在新线程中清空与同步相关的本地信息
|
|
|
|
|
new Thread(new Runnable() {
|
|
|
|
|
public void run() {
|
|
|
|
|
// 创建ContentValues以存储需要更新的值
|
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
|
values.put(NoteColumns.GTASK_ID, "");
|
|
|
|
|
values.put(NoteColumns.SYNC_ID, 0);
|
|
|
|
|
values.put(NoteColumns.GTASK_ID, ""); // 清空GTASK_ID
|
|
|
|
|
values.put(NoteColumns.SYNC_ID, 0); // 设置SYNC_ID为0
|
|
|
|
|
getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
|
|
|
|
|
}
|
|
|
|
|
}).start();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 获取当前设定的同步账号
|
|
|
|
|
public static String getSyncAccountName(Context context) {
|
|
|
|
|
// 获取SharedPreferences的实例来存储偏好设置
|
|
|
|
|
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
|
|
|
|
|
Context.MODE_PRIVATE);
|
|
|
|
|
// 返回存储的同步账号名称，如果没有则返回空字符串""
|
|
|
|
|
return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 设置最后同步时间
|
|
|
|
|
public static void setLastSyncTime(Context context, long time) {
|
|
|
|
|
// 获取SharedPreferences的实例来存储偏好设置
|
|
|
|
|
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
|
|
|
|
|
Context.MODE_PRIVATE);
|
|
|
|
|
// 创建一个SharedPreferences.Editor进行编辑
|
|
|
|
|
SharedPreferences.Editor editor = settings.edit();
|
|
|
|
|
// 将同步时间设置为传入的time
|
|
|
|
|
editor.putLong(PREFERENCE_LAST_SYNC_TIME, time);
|
|
|
|
|
// 将更改提交到SharedPreferences
|
|
|
|
|
editor.commit();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 获取最后同步时间
|
|
|
|
|
public static long getLastSyncTime(Context context) {
|
|
|
|
|
// 获取SharedPreferences的实例来存储偏好设置
|
|
|
|
|
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
|
|
|
|
|
Context.MODE_PRIVATE);
|
|
|
|
|
// 返回存储的最后同步时间，如果没有则返回0
|
|
|
|
|
return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 内部类，广播接收器，用于接收同步状态变更的广播
|
|
|
|
|
private class GTaskReceiver extends BroadcastReceiver {
|
|
|
|
|
|
|
|
|
|
@Override
|
|
|
|
|
public void onReceive(Context context, Intent intent) {
|
|
|
|
|
// 刷新界面显示
|
|
|
|
|
refreshUI();
|
|
|
|
|
if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {
|
|
|
|
|
// 找到同步状态的TextView，并设置显示文本
|
|
|
|
|
TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
|
|
|
|
|
syncStatus.setText(intent
|
|
|
|
|
.getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG));
|
|
|
|
|
@ -374,9 +453,12 @@ public class NotesPreferenceActivity extends PreferenceActivity {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 处理选项菜单的项被选择的事件
|
|
|
|
|
public boolean onOptionsItemSelected(MenuItem item) {
|
|
|
|
|
// 根据菜单项的ID进行不同的操作
|
|
|
|
|
switch (item.getItemId()) {
|
|
|
|
|
case android.R.id.home:
|
|
|
|
|
// 如果是home项，创建意图，启动NotesListActivity
|
|
|
|
|
Intent intent = new Intent(this, NotesListActivity.class);
|
|
|
|
|
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
|
|
|
|
|
startActivity(intent);
|
|
|
|
|
|
Ryuki