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ui-NotesPreferenceActivity注释

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pull/3/head
weichunyi 2 months ago
parent c75d3c5a7e
commit 6d774885ea
1 changed files with 114 additions and 22 deletions
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136
src/Notes-master/src/net/micode/notes/ui/NotesPreferenceActivity.java
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@ -48,42 +48,61 @@ import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.gtask.remote.GTaskSyncService;
/**
* NotesPreferenceActivity是一个用于设置便签应用偏好的Activity
* 提供了账户管理、同步设置等功能
*/
public class NotesPreferenceActivity extends PreferenceActivity {
// 偏好设置的名称
public static final String PREFERENCE_NAME = "notes_preferences";
// 存储同步账户名称的键
public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name";
// 存储上次同步时间的键
public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time";
// 设置便签背景颜色的键
public static final String PREFERENCE_SET_BG_COLOR_KEY = "pref_key_bg_random_appear";
// 同步账户设置的键
private static final String PREFERENCE_SYNC_ACCOUNT_KEY = "pref_sync_account_key";
// 账户权限过滤器的键
private static final String AUTHORITIES_FILTER_KEY = "authorities";
// 账户设置的分类
private PreferenceCategory mAccountCategory;
// 接收同步服务广播的接收器
private GTaskReceiver mReceiver;
// 原始账户列表
private Account[] mOriAccounts;
// 是否添加了新账户的标志
private boolean mHasAddedAccount;
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
/* using the app icon for navigation */
// 设置应用图标可用于导航返回
getActionBar().setDisplayHomeAsUpEnabled(true);
// 加载偏好设置布局
addPreferencesFromResource(R.xml.preferences);
mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY);
mReceiver = new GTaskReceiver();
// 注册广播接收器，监听同步服务的状态变化
IntentFilter filter = new IntentFilter();
filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME);
registerReceiver(mReceiver, filter);
mOriAccounts = null;
// 添加设置页面的头部视图
View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null);
getListView().addHeaderView(header, null, true);
}
@ -92,8 +111,7 @@ public class NotesPreferenceActivity extends PreferenceActivity {
protected void onResume() {
super.onResume();
// need to set sync account automatically if user has added a new
// account
// 如果添加了新账户，自动设置同步账户
if (mHasAddedAccount) {
Account[] accounts = getGoogleAccounts();
if (mOriAccounts != null && accounts.length > mOriAccounts.length) {
@ -113,36 +131,44 @@ public class NotesPreferenceActivity extends PreferenceActivity {
}
}
// 刷新界面
refreshUI();
}
@Override
protected void onDestroy() {
// 注销广播接收器，防止内存泄漏
if (mReceiver != null) {
unregisterReceiver(mReceiver);
}
super.onDestroy();
}
/**
* 加载账户设置相关的偏好项
*/
private void loadAccountPreference() {
// 清空账户分类下的所有偏好项
mAccountCategory.removeAll();
// 创建账户选择偏好项
Preference accountPref = new Preference(this);
final String defaultAccount = getSyncAccountName(this);
accountPref.setTitle(getString(R.string.preferences_account_title));
accountPref.setSummary(getString(R.string.preferences_account_summary));
accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
// 如果当前没有进行同步操作
if (!GTaskSyncService.isSyncing()) {
// 如果还没有设置账户，显示选择账户对话框
if (TextUtils.isEmpty(defaultAccount)) {
// the first time to set account
showSelectAccountAlertDialog();
} else {
// if the account has already been set, we need to promp
// user about the risk
// 如果已经设置了账户，显示更改账户确认对话框
showChangeAccountConfirmAlertDialog();
}
} else {
// 同步过程中不能更改账户，提示用户
Toast.makeText(NotesPreferenceActivity.this,
R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
.show();
@ -151,15 +177,20 @@ public class NotesPreferenceActivity extends PreferenceActivity {
}
});
// 将账户偏好项添加到分类中
mAccountCategory.addPreference(accountPref);
}
/**
* 加载同步按钮和相关状态显示
*/
private void loadSyncButton() {
Button syncButton = (Button) findViewById(R.id.preference_sync_button);
TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
// set button state
// 设置同步按钮状态
if (GTaskSyncService.isSyncing()) {
// 当前正在同步，显示取消同步按钮
syncButton.setText(getString(R.string.preferences_button_sync_cancel));
syncButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
@ -167,6 +198,7 @@ public class NotesPreferenceActivity extends PreferenceActivity {
}
});
} else {
// 当前没有同步，显示立即同步按钮
syncButton.setText(getString(R.string.preferences_button_sync_immediately));
syncButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
@ -174,13 +206,16 @@ public class NotesPreferenceActivity extends PreferenceActivity {
}
});
}
// 如果没有设置同步账户，禁用同步按钮
syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this)));
// set last sync time
// 设置上次同步时间显示
if (GTaskSyncService.isSyncing()) {
// 显示同步进度
lastSyncTimeView.setText(GTaskSyncService.getProgressString());
lastSyncTimeView.setVisibility(View.VISIBLE);
} else {
// 显示上次同步时间
long lastSyncTime = getLastSyncTime(this);
if (lastSyncTime != 0) {
lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time,
@ -188,19 +223,27 @@ public class NotesPreferenceActivity extends PreferenceActivity {
lastSyncTime)));
lastSyncTimeView.setVisibility(View.VISIBLE);
} else {
// 从未同步过，隐藏时间显示
lastSyncTimeView.setVisibility(View.GONE);
}
}
}
/**
* 刷新整个设置界面
*/
private void refreshUI() {
loadAccountPreference();
loadSyncButton();
}
/**
* 显示选择账户的对话框
*/
private void showSelectAccountAlertDialog() {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
// 设置对话框标题
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));
@ -210,6 +253,7 @@ public class NotesPreferenceActivity extends PreferenceActivity {
dialogBuilder.setCustomTitle(titleView);
dialogBuilder.setPositiveButton(null, null);
// 获取所有Google账户
Account[] accounts = getGoogleAccounts();
String defAccount = getSyncAccountName(this);
@ -217,6 +261,7 @@ public class NotesPreferenceActivity extends PreferenceActivity {
mHasAddedAccount = false;
if (accounts.length > 0) {
// 有可用账户，显示账户列表供用户选择
CharSequence[] items = new CharSequence[accounts.length];
final CharSequence[] itemMapping = items;
int checkedItem = -1;
@ -230,6 +275,7 @@ public class NotesPreferenceActivity extends PreferenceActivity {
dialogBuilder.setSingleChoiceItems(items, checkedItem,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// 用户选择了账户，设置为同步账户
setSyncAccount(itemMapping[which].toString());
dialog.dismiss();
refreshUI();
@ -237,12 +283,14 @@ public class NotesPreferenceActivity extends PreferenceActivity {
});
}
// 添加"添加账户"选项
View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);
dialogBuilder.setView(addAccountView);
final AlertDialog dialog = dialogBuilder.show();
addAccountView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// 用户点击添加账户
mHasAddedAccount = true;
Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] {
@ -254,9 +302,13 @@ public class NotesPreferenceActivity extends PreferenceActivity {
});
}
/**
* 显示更改账户确认对话框
*/
private void showChangeAccountConfirmAlertDialog() {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
// 设置对话框标题
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,
@ -265,6 +317,7 @@ public class NotesPreferenceActivity extends PreferenceActivity {
subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg));
dialogBuilder.setCustomTitle(titleView);
// 设置选项：更改账户、移除账户、取消
CharSequence[] menuItemArray = new CharSequence[] {
getString(R.string.preferences_menu_change_account),
getString(R.string.preferences_menu_remove_account),
@ -273,8 +326,10 @@ public class NotesPreferenceActivity extends PreferenceActivity {
dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
if (which == 0) {
// 用户选择更改账户
showSelectAccountAlertDialog();
} else if (which == 1) {
// 用户选择移除账户
removeSyncAccount();
refreshUI();
}
@ -283,13 +338,22 @@ public class NotesPreferenceActivity extends PreferenceActivity {
dialogBuilder.show();
}
/**
* 获取设备上的Google账户列表
*/
private Account[] getGoogleAccounts() {
AccountManager accountManager = AccountManager.get(this);
return accountManager.getAccountsByType("com.google");
}
/**
* 设置同步账户
* @param account 要设置的账户名称
*/
private void setSyncAccount(String account) {
// 如果新设置的账户与当前账户不同
if (!getSyncAccountName(this).equals(account)) {
// 保存新的账户名称到偏好设置
SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
if (account != null) {
@ -299,10 +363,10 @@ public class NotesPreferenceActivity extends PreferenceActivity {
}
editor.commit();
// clean up last sync time
// 清除上次同步时间
setLastSyncTime(this, 0);
// clean up local gtask related info
// 清除本地与Google任务相关的信息
new Thread(new Runnable() {
public void run() {
ContentValues values = new ContentValues();
@ -312,13 +376,18 @@ public class NotesPreferenceActivity extends PreferenceActivity {
}
}).start();
// 提示用户账户设置成功
Toast.makeText(NotesPreferenceActivity.this,
getString(R.string.preferences_toast_success_set_accout, account),
Toast.LENGTH_SHORT).show();
}
}
/**
* 移除同步账户
*/
private void removeSyncAccount() {
// 从偏好设置中移除账户信息
SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
@ -329,7 +398,7 @@ public class NotesPreferenceActivity extends PreferenceActivity {
}
editor.commit();
// clean up local gtask related info
// 清除本地与Google任务相关的信息
new Thread(new Runnable() {
public void run() {
ContentValues values = new ContentValues();
@ -340,12 +409,22 @@ public class NotesPreferenceActivity extends PreferenceActivity {
}).start();
}
/**
* 获取当前设置的同步账户名称
* @param context 上下文对象
* @return 同步账户名称，如果没有设置则返回空字符串
*/
public static String getSyncAccountName(Context context) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
}
/**
* 设置上次同步时间
* @param context 上下文对象
* @param time 上次同步的时间戳（毫秒）
*/
public static void setLastSyncTime(Context context, long time) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
@ -354,29 +433,42 @@ public class NotesPreferenceActivity extends PreferenceActivity {
editor.commit();
}
/**
* 获取上次同步时间
* @param context 上下文对象
* @return 上次同步的时间戳（毫秒），如果没有同步过则返回0
*/
public static long getLastSyncTime(Context context) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0);
}
/**
* 广播接收器，用于接收同步服务的状态更新
*/
private class GTaskReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// 刷新界面
refreshUI();
// 如果正在同步，更新同步状态显示
if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {
TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
syncStatus.setText(intent
.getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG));
}
}
}
/**
* 处理选项菜单的点击事件
*/
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// 点击应用图标，返回主界面
Intent intent = new Intent(this, NotesListActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
@ -385,4 +477,4 @@ public class NotesPreferenceActivity extends PreferenceActivity {
return false;
}
}
}
}
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