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Update NotesPreferenceActivity.java

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pf45q8f3g 7 months ago
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src/java/net/micode/notes/ui/NotesPreferenceActivity.java
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/* /*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * 版权所有 (c) 2010-2011, MiCode 开源社区 (www.micode.net)
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * 本文件授权使用 Apache License, Version 2.0（以下简称“许可证”）；
* you may not use this file except in compliance with the License. * 除非符合许可证规定，否则不得使用此文件。
* You may obtain a copy of the License at * 您可以从以下网址获取许可证副本：
* *
* http://www.apache.org/licenses/LICENSE-2.0 * http://www.apache.org/licenses/LICENSE-2.0
* *
* Unless required by applicable law or agreed to in writing, software * 除非适用法律要求或书面同意，否则根据许可证分发的软件
* distributed under the License is distributed on an "AS IS" BASIS, * 均按“原样”分发，不附带任何明示或暗示的保证或条件。
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * 有关许可权限和限制的具体语言，请参阅许可证。
* See the License for the specific language governing permissions and
* limitations under the License.
*/ */
package net.micode.notes.ui; package net.micode.notes.ui;
import android.accounts.Account; import android.accounts.Account;
import android.accounts.AccountManager; import android.accounts.AccountManager;
import android.app.ActionBar; import android.app.ActionBar;
import android.app.AlertDialog; import android.app.AlertDialog;
import android.content.BroadcastReceiver; import android.content.BroadcastReceiver;
import android.content.ContentValues; import android.content.ContentValues;
import android.content.Context; import android.content.Context;
import android.content.DialogInterface; import android.content.DialogInterface;
import android.content.Intent; import android.content.Intent;
import android.content.IntentFilter; import android.content.IntentFilter;
import android.content.SharedPreferences; import android.content.SharedPreferences;
import android.os.Bundle; import android.os.Bundle;
import android.preference.Preference; import android.preference.Preference;
import android.preference.Preference.OnPreferenceClickListener; import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceActivity; import android.preference.PreferenceActivity;
import android.preference.PreferenceCategory; import android.preference.PreferenceCategory;
import android.text.TextUtils; import android.text.TextUtils;
import android.text.format.DateFormat; import android.text.format.DateFormat;
import android.view.LayoutInflater; import android.view.LayoutInflater;
import android.view.Menu; import android.view.Menu;
import android.view.MenuItem; import android.view.MenuItem;
import android.view.View; import android.view.View;
import android.widget.Button; import android.widget.Button;
import android.widget.TextView; import android.widget.TextView;
import android.widget.Toast; import android.widget.Toast;
import net.micode.notes.R; import net.micode.notes.R;
import net.micode.notes.data.Notes; import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.gtask.remote.GTaskSyncService; import net.micode.notes.gtask.remote.GTaskSyncService;
/* /**
*该类功能：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。 * NotesPreferenceActivity 类用于管理便签应用的设置。
* 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 * 它继承自 PreferenceActivity，提供了一个用于配置应用设置的界面。
*/ */
public class NotesPreferenceActivity extends PreferenceActivity { public class NotesPreferenceActivity extends PreferenceActivity {
public static final String PREFERENCE_NAME = "notes_preferences"; public static final String PREFERENCE_NAME = "notes_preferences";
//优先名 public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name";
public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name"; public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time";
//同步账号 public static final String PREFERENCE_SET_BG_COLOR_KEY = "pref_key_bg_random_appear";
public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time";
//同步时间 private static final String PREFERENCE_SYNC_ACCOUNT_KEY = "pref_sync_account_key";
public static final String PREFERENCE_SET_BG_COLOR_KEY = "pref_key_bg_random_appear"; private static final String AUTHORITIES_FILTER_KEY = "authorities";
private static final String PREFERENCE_SYNC_ACCOUNT_KEY = "pref_sync_account_key"; private PreferenceCategory mAccountCategory;
//同步密码 private GTaskReceiver mReceiver;
private static final String AUTHORITIES_FILTER_KEY = "authorities"; private Account[] mOriAccounts;
//本地密码 private boolean mHasAddedAccount;
private PreferenceCategory mAccountCategory;
//账户分组 @Override
private GTaskReceiver mReceiver; protected void onCreate(Bundle icicle) {
//同步任务接收器 super.onCreate(icicle);
private Account[] mOriAccounts; getActionBar().setDisplayHomeAsUpEnabled(true);
//账户 addPreferencesFromResource(R.xml.preferences);
private boolean mHasAddedAccount; mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY);
//账户的hash标记 mReceiver = new GTaskReceiver();
IntentFilter filter = new IntentFilter();
@Override filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME);
/* registerReceiver(mReceiver, filter);
*函数功能：创建一个activity，在函数里要完成所有的正常静态设置
*参数：Bundle icicle：存放了 activity 当前的状态 mOriAccounts = null;
*函数实现：如下注释 View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null);
*/ getListView().addHeaderView(header, null, true);
protected void onCreate(Bundle icicle) { }
//先执行父类的创建函数
super.onCreate(icicle); @Override
protected void onResume() {
/* using the app icon for navigation */ super.onResume();
getActionBar().setDisplayHomeAsUpEnabled(true); if (mHasAddedAccount) {
//给左上角图标的左边加上一个返回的图标 Account[] accounts = getGoogleAccounts();
if (mOriAccounts != null && accounts.length > mOriAccounts.length) {
addPreferencesFromResource(R.xml.preferences); for (Account accountNew : accounts) {
//添加xml来源并显示 xml boolean found = false;
mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY); for (Account accountOld : mOriAccounts) {
//根据同步账户关键码来初始化分组 if (TextUtils.equals(accountOld.name, accountNew.name)) {
mReceiver = new GTaskReceiver(); found = true;
IntentFilter filter = new IntentFilter(); break;
filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME); }
registerReceiver(mReceiver, filter); }
//初始化同步组件 if (!found) {
setSyncAccount(accountNew.name);
mOriAccounts = null; break;
View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null); }
//获取listvivew，ListView的作用:用于列出所有选择 }
getListView().addHeaderView(header, null, true); }
//在listview组件上方添加其他组件 }
} refreshUI();
}
@Override
/* @Override
* 函数功能：activity交互功能的实现，用于接受用户的输入 protected void onDestroy() {
* 函数实现：如下注释 if (mReceiver != null) {
*/ unregisterReceiver(mReceiver);
protected void onResume() { }
//先执行父类 的交互实现 super.onDestroy();
super.onResume(); }
// need to set sync account automatically if user has added a new private void loadAccountPreference() {
// account mAccountCategory.removeAll();
if (mHasAddedAccount) { Preference accountPref = new Preference(this);
//若用户新加了账户则自动设置同步账户 final String defaultAccount = getSyncAccountName(this);
Account[] accounts = getGoogleAccounts(); accountPref.setTitle(getString(R.string.preferences_account_title));
//获取google同步账户 accountPref.setSummary(getString(R.string.preferences_account_summary));
if (mOriAccounts != null && accounts.length > mOriAccounts.length) { accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
//若原账户不为空且当前账户有增加 public boolean onPreferenceClick(Preference preference) {
for (Account accountNew : accounts) { if (!GTaskSyncService.isSyncing()) {
boolean found = false; if (TextUtils.isEmpty(defaultAccount)) {
for (Account accountOld : mOriAccounts) { showSelectAccountAlertDialog();
if (TextUtils.equals(accountOld.name, accountNew.name)) { } else {
//更新账户 showChangeAccountConfirmAlertDialog();
found = true; }
break; } else {
} Toast.makeText(NotesPreferenceActivity.this,
} R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
if (!found) { .show();
setSyncAccount(accountNew.name); }
//若是没有找到旧的账户，那么同步账号中就只添加新账户 return true;
break; }
} });
} mAccountCategory.addPreference(accountPref);
} }
}
private void loadSyncButton() {
refreshUI(); Button syncButton = (Button) findViewById(R.id.preference_sync_button);
//刷新标签界面 TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
} if (GTaskSyncService.isSyncing()) {
syncButton.setText(getString(R.string.preferences_button_sync_cancel));
@Override syncButton.setOnClickListener(new View.OnClickListener() {
/* public void onClick(View v) {
* 函数功能：销毁一个activity GTaskSyncService.cancelSync(NotesPreferenceActivity.this);
* 函数实现：如下注释 }
*/ });
protected void onDestroy() { } else {
if (mReceiver != null) { syncButton.setText(getString(R.string.preferences_button_sync_immediately));
unregisterReceiver(mReceiver); syncButton.setOnClickListener(new View.OnClickListener() {
//注销接收器 public void onClick(View v) {
} GTaskSyncService.startSync(NotesPreferenceActivity.this);
super.onDestroy(); }
//执行父类的销毁动作 });
} }
syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this)));
/*
* 函数功能：重新设置账户信息 if (GTaskSyncService.isSyncing()) {
* 函数实现：如下注释 lastSyncTimeView.setText(GTaskSyncService.getProgressString());
*/ lastSyncTimeView.setVisibility(View.VISIBLE);
private void loadAccountPreference() { } else {
mAccountCategory.removeAll(); long lastSyncTime = getLastSyncTime(this);
//销毁所有的分组 if (lastSyncTime != 0) {
Preference accountPref = new Preference(this); lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time,
//建立首选项 DateFormat.format(getString(R.string.preferences_last_sync_time_format),
final String defaultAccount = getSyncAccountName(this); lastSyncTime)));
accountPref.setTitle(getString(R.string.preferences_account_title)); lastSyncTimeView.setVisibility(View.VISIBLE);
accountPref.setSummary(getString(R.string.preferences_account_summary)); } else {
//设置首选项的大标题和小标题 lastSyncTimeView.setVisibility(View.GONE);
accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() { }
public boolean onPreferenceClick(Preference preference) { }
//建立监听器 }
if (!GTaskSyncService.isSyncing()) {
if (TextUtils.isEmpty(defaultAccount)) { private void refreshUI() {
// the first time to set account loadAccountPreference();
//若是第一次建立账户显示选择账户提示对话框 loadSyncButton();
showSelectAccountAlertDialog(); }
} else {
// if the account has already been set, we need to promp private void showSelectAccountAlertDialog() {
// user about the risk AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
//若是已经建立则显示修改对话框并进行修改操作 View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
showChangeAccountConfirmAlertDialog(); TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
} titleTextView.setText(getString(R.string.preferences_dialog_select_account_title));
} else { TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
//若在没有同步的情况下，则在toast中显示不能修改 subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips));
Toast.makeText(NotesPreferenceActivity.this, dialogBuilder.setCustomTitle(titleView);
R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT) dialogBuilder.setPositiveButton(null, null);
.show(); Account[] accounts = getGoogleAccounts();
} String defAccount = getSyncAccountName(this);
return true; mOriAccounts = accounts;
} mHasAddedAccount = false;
});
if (accounts.length > 0) {
//根据新建首选项编辑新的账户分组 CharSequence[] items = new CharSequence[accounts.length];
mAccountCategory.addPreference(accountPref); final CharSequence[] itemMapping = items;
} int checkedItem = -1;
int index = 0;
/* for (Account account : accounts) {
*函数功能：设置按键的状态和最后同步的时间 if (TextUtils.equals(account.name, defAccount)) {
*函数实现：如下注释 checkedItem = index;
*/ }
private void loadSyncButton() { items[index++] = account.name;
Button syncButton = (Button) findViewById(R.id.preference_sync_button); }
TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview); dialogBuilder.setSingleChoiceItems(items, checkedItem,
//获取同步按钮控件和最终同步时间的的窗口 new DialogInterface.OnClickListener() {
// set button state public void onClick(DialogInterface dialog, int which) {
//设置按钮的状态 setSyncAccount(itemMapping[which].toString());
if (GTaskSyncService.isSyncing()) { dialog.dismiss();
//若是在同步状态下 refreshUI();
syncButton.setText(getString(R.string.preferences_button_sync_cancel)); }
syncButton.setOnClickListener(new View.OnClickListener() { });
public void onClick(View v) { }
GTaskSyncService.cancelSync(NotesPreferenceActivity.this);
} View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);
}); dialogBuilder.setView(addAccountView);
//设置按钮显示的文本为“取消同步”以及监听器
} else { final AlertDialog dialog = dialogBuilder.show();
syncButton.setText(getString(R.string.preferences_button_sync_immediately)); addAccountView.setOnClickListener(new View.OnClickListener() {
syncButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) {
public void onClick(View v) { mHasAddedAccount = true;
GTaskSyncService.startSync(NotesPreferenceActivity.this); Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
} intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] {
}); "gmail-ls"
//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 });
} startActivityForResult(intent, -1);
syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this))); dialog.dismiss();
//设置按键可用还是不可用 }
});
// set last sync time }
// 设置最终同步时间
if (GTaskSyncService.isSyncing()) { private void showChangeAccountConfirmAlertDialog() {
//若是在同步的情况下 AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
lastSyncTimeView.setText(GTaskSyncService.getProgressString()); View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
lastSyncTimeView.setVisibility(View.VISIBLE); TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
// 根据当前同步服务器设置时间显示框的文本以及可见性 titleTextView.setText(getString(R.string.preferences_dialog_change_account_title,
} else { getSyncAccountName(this)));
//若是非同步情况 TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
long lastSyncTime = getLastSyncTime(this); subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg));
if (lastSyncTime != 0) { dialogBuilder.setCustomTitle(titleView);
lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time, CharSequence[] menuItemArray = new CharSequence[] {
DateFormat.format(getString(R.string.preferences_last_sync_time_format), getString(R.string.preferences_menu_change_account),
lastSyncTime))); getString(R.string.preferences_menu_remove_account),
lastSyncTimeView.setVisibility(View.VISIBLE); getString(R.string.preferences_menu_cancel)
//则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 };
} else { dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
//若时间为空直接设置为不可见状态 public void onClick(DialogInterface dialog, int which) {
lastSyncTimeView.setVisibility(View.GONE); if (which == 0) {
} showSelectAccountAlertDialog();
} } else if (which == 1) {
} removeSyncAccount();
/* refreshUI();
*函数功能：刷新标签界面 }
*函数实现：调用上文设置账号和设置按键两个函数来实现 }
*/ });
private void refreshUI() { dialogBuilder.show();
loadAccountPreference(); }
loadSyncButton();
} private Account[] getGoogleAccounts() {
AccountManager accountManager = AccountManager.get(this);
/* return accountManager.getAccountsByType("com.google");
* 函数功能：显示账户选择的对话框并进行账户的设置 }
* 函数实现：如下注释
*/ private void setSyncAccount(String account) {
private void showSelectAccountAlertDialog() { if (!getSyncAccountName(this).equals(account)) {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this); SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
//创建一个新的对话框 SharedPreferences.Editor editor = settings.edit();
if (account != null) {
View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null); editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account);
TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title); } else {
titleTextView.setText(getString(R.string.preferences_dialog_select_account_title)); editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle); }
subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips)); editor.commit();
//设置标题以及子标题的内容
dialogBuilder.setCustomTitle(titleView); setLastSyncTime(this, 0);
dialogBuilder.setPositiveButton(null, null);
//设置对话框的自定义标题，建立一个YES的按钮 new Thread(new Runnable() {
Account[] accounts = getGoogleAccounts(); public void run() {
String defAccount = getSyncAccountName(this); ContentValues values = new ContentValues();
//获取同步账户信息 values.put(NoteColumns.GTASK_ID, "");
mOriAccounts = accounts; values.put(NoteColumns.SYNC_ID, 0);
mHasAddedAccount = false; getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
}
if (accounts.length > 0) { }).start();
//若账户不为空
CharSequence[] items = new CharSequence[accounts.length]; Toast.makeText(NotesPreferenceActivity.this,
final CharSequence[] itemMapping = items; getString(R.string.preferences_toast_success_set_account, account),
int checkedItem = -1; Toast.LENGTH_SHORT).show();
int index = 0; }
for (Account account : accounts) { }
if (TextUtils.equals(account.name, defAccount)) {
checkedItem = index; private void removeSyncAccount() {
//在账户列表中查询到所需账户 SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
} SharedPreferences.Editor editor = settings.edit();
items[index++] = account.name;
} if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
dialogBuilder.setSingleChoiceItems(items, checkedItem, editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME);
//在对话框建立一个单选的复选框 }
new DialogInterface.OnClickListener() { if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {
public void onClick(DialogInterface dialog, int which) { editor.remove(PREFERENCE_LAST_SYNC_TIME);
setSyncAccount(itemMapping[which].toString()); }
dialog.dismiss(); editor.commit();
//取消对话框
refreshUI(); new Thread(new Runnable() {
} public void run() {
//设置点击后执行的事件，包括检录新同步账户和刷新标签界面 ContentValues values = new ContentValues();
}); values.put(NoteColumns.GTASK_ID, "");
//建立对话框网络版的监听器 values.put(NoteColumns.SYNC_ID, 0);
} getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
}
View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null); }).start();
dialogBuilder.setView(addAccountView); }
//给新加账户对话框设置自定义样式
public static String getSyncAccountName(Context context) {
final AlertDialog dialog = dialogBuilder.show(); SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
//显示对话框 return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
addAccountView.setOnClickListener(new View.OnClickListener() { }
public void onClick(View v) {
mHasAddedAccount = true; public static void setLastSyncTime(Context context, long time) {
//将新加账户的hash置true SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS"); SharedPreferences.Editor editor = settings.edit();
//建立网络建立组件 editor.putLong(PREFERENCE_LAST_SYNC_TIME, time);
intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] { editor.commit();
"gmail-ls" }
});
startActivityForResult(intent, -1); public static long getLastSyncTime(Context context) {
//跳回上一个选项 SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
dialog.dismiss(); return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0);
} }
});
//建立新加账户对话框的监听器 private class GTaskReceiver extends BroadcastReceiver {
} @Override
public void onReceive(Context context, Intent intent) {
/* refreshUI();
* 函数功能：显示账户选择对话框和相关账户操作 if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {
* 函数实现：如下注释 TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
*/ syncStatus.setText(intent.getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG));
private void showChangeAccountConfirmAlertDialog() { }
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this); }
//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); @Override
titleTextView.setText(getString(R.string.preferences_dialog_change_account_title, public boolean onOptionsItemSelected(MenuItem item) {
getSyncAccountName(this))); switch (item.getItemId()) {
TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle); case android.R.id.home:
subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg)); Intent intent = new Intent(this, NotesListActivity.class);
//根据同步修改的账户信息设置标题以及子标题的内容 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
dialogBuilder.setCustomTitle(titleView); startActivity(intent);
//设置对话框的自定义标题 return true;
CharSequence[] menuItemArray = new CharSequence[] { default:
getString(R.string.preferences_menu_change_account), return false;
getString(R.string.preferences_menu_remove_account), }
getString(R.string.preferences_menu_cancel) }
}; }
//定义一些标记字符串
dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
//设置对话框要显示的一个list，用于显示几个命令时,即change，remove，cancel
public void onClick(DialogInterface dialog, int which) {
//按键功能，由which来决定
if (which == 0) {
//进入账户选择对话框
showSelectAccountAlertDialog();
} else if (which == 1) {
//删除账户并且跟新便签界面
removeSyncAccount();
refreshUI();
}
}
});
dialogBuilder.show();
//显示对话框
}
/*
*函数功能：获取谷歌账户
*函数实现：通过账户管理器直接获取
*/
private Account[] getGoogleAccounts() {
AccountManager accountManager = AccountManager.get(this);
return accountManager.getAccountsByType("com.google");
}
/*
* 函数功能：设置同步账户
* 函数实现：如下注释：
*/
private void setSyncAccount(String account) {
if (!getSyncAccountName(this).equals(account)) {
//假如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();
//编辑共享的首选项
if (account != null) {
editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account);
} else {
editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
}
//将该账号加入到首选项中
editor.commit();
//提交修改的数据
setLastSyncTime(this, 0);
//将最后同步时间清零
// clean up local gtask related info
new Thread(new Runnable() {
public void run() {
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();
//重置当地同步任务的信息
Toast.makeText(NotesPreferenceActivity.this,
getString(R.string.preferences_toast_success_set_accout, account),
Toast.LENGTH_SHORT).show();
//将toast的文本信息置为“设置账户成功”并显示出来
}
}
/*
* 函数功能：删除同步账户
* 函数实现：如下注释：
*/
private void removeSyncAccount() {
SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
//设置共享首选项
if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME);
//假如当前首选项中有账户就删除
}
if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {
editor.remove(PREFERENCE_LAST_SYNC_TIME);
//删除当前首选项中有账户时间
}
editor.commit();
//提交更新后的数据
// clean up local gtask related info
new Thread(new Runnable() {
public void run() {
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();
//重置当地同步任务的信息
}
/*
* 函数功能：获取同步账户名称
* 函数实现：通过共享的首选项里的信息直接获取
*/
public static String getSyncAccountName(Context context) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
}
/*
* 函数功能：设置最终同步的时间
* 函数实现：如下注释
*/
public static void setLastSyncTime(Context context, long time) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
// 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();
//编辑最终同步时间并提交更新
}
/*
* 函数功能：获取最终同步时间
* 函数实现：通过共享的首选项里的信息直接获取
*/
public static long getLastSyncTime(Context context) {
SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
Context.MODE_PRIVATE);
return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0);
}
/*
* 函数功能：接受同步信息
* 函数实现：继承BroadcastReceiver
*/
private class GTaskReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
refreshUI();
if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {
//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);
syncStatus.setText(intent
.getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG));
//通过获取的数据在设置系统的状态
}
}
}
/*
* 函数功能：处理菜单的选项
* 函数实现：如下注释
* 参数:MenuItem菜单选项
*/
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
//根据选项的id选择，这里只有一个主页
case android.R.id.home:
Intent intent = new Intent(this, NotesListActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
return true;
//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
default:
return false;
}
}
}
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