diff --git a/doc/标注/210340061_林亭旭/NotesListActivity.java b/doc/标注/210340061_林亭旭/NotesListActivity.java index 12e86f8..81eda6e 100644 --- a/doc/标注/210340061_林亭旭/NotesListActivity.java +++ b/doc/标注/210340061_林亭旭/NotesListActivity.java @@ -82,15 +82,15 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt //OnClickListener，OnItemLongClickListener是一个抽象类 //定义了一个Activity的子类NotesListActivity，用这个类实现了上面两个接口， //这两个接口的 - private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0; + private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;//各类文件查询注释行 - private static final int FOLDER_LIST_QUERY_TOKEN = 1; + private static final int FOLDER_LIST_QUERY_TOKEN = 1;//文件夹列表查询 - private static final int MENU_FOLDER_DELETE = 0; + private static final int MENU_FOLDER_DELETE = 0;//菜单删除 - private static final int MENU_FOLDER_VIEW = 1; + private static final int MENU_FOLDER_VIEW = 1;//菜单界面 - private static final int MENU_FOLDER_CHANGE_NAME = 2; + private static final int MENU_FOLDER_CHANGE_NAME = 2;//菜单修改命名 private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction"; @@ -134,44 +134,53 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR (" + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND " + NoteColumns.NOTES_COUNT + ">0)"; - + //对输入进行步数统计，分为NoteColumns.TYPE，输入，Notes.TYPE_SYSTEM，NoteColumns.PARENT_ID或者Notes.ID_CALL_RECORD_FOLDER，NoteColumns.NOTES_COUNTNoteColumns.ID private final static int REQUEST_CODE_OPEN_NODE = 102; private final static int REQUEST_CODE_NEW_NODE = 103; @Override - protected void onCreate(Bundle savedInstanceState) { - super.onCreate(savedInstanceState); + // 创建类 + protected void onCreate(final Bundle savedInstanceState) { //需要是final类型 根据程序上下文环境，Java关键字final有“这是无法改变的”或者“终态的”含义，它可以修饰非抽象类、非抽象类成员方法和变量。你可能出于两种理解而需要阻止改变：设计或效率。 + // final类不能被继承，没有子类，final类中的方法默认是final的。 + //final方法不能被子类的方法覆盖，但可以被继承。 + //final成员变量表示常量，只能被赋值一次，赋值后值不再改变。 + //final不能用于修饰构造方法。 + super.onCreate(savedInstanceState); // 调用父类的onCreate函数 setContentView(R.layout.note_list); initResources(); /** * Insert an introduction when user firstly use this application */ - setAppInfoFromRawRes(); + setAppInfoFromRawRes();//加入一个介绍当用户第一次使用这个app时 } @Override + // 返回一些子模块完成的数据交给主Activity处理 protected void onActivityResult(int requestCode, int resultCode, Intent data) { + // 结果值 和 需求值 符合要求，数据 if (resultCode == RESULT_OK && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) { mNotesListAdapter.changeCursor(null); } else { super.onActivityResult(requestCode, resultCode, data); + // 调用 Activity 的onActivityResult（） } } private void setAppInfoFromRawRes() { - SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this); + // Android平台给我们提供了一个SharedPreferences类，它是一个轻量级的存储类，适用于存储软件配置参数。 + SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);//获取默认共享首选项 if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) { StringBuilder sb = new StringBuilder(); InputStream in = null; try { - in = getResources().openRawResource(R.raw.introduction); + in = getResources().openRawResource(R.raw.introduction); if (in != null) { InputStreamReader isr = new InputStreamReader(in); BufferedReader br = new BufferedReader(isr); - char [] buf = new char[1024]; - int len = 0; + char [] buf = new char[1024]; // 自定义数值 + int len = 0;//初始化len while ((len = br.read(buf)) > 0) { sb.append(buf, 0, len); } @@ -183,7 +192,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt e.printStackTrace(); return; } finally { - if(in != null) { + if (in != null) { try { in.close(); } catch (IOException e) { @@ -193,11 +202,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt } } + // 创建空的WorkingNote WorkingNote note = WorkingNote.createEmptyNote(this, Notes.ID_ROOT_FOLDER, AppWidgetManager.INVALID_APPWIDGET_ID, Notes.TYPE_WIDGET_INVALIDE, ResourceParser.RED); note.setWorkingText(sb.toString()); if (note.saveNote()) { + // 更新保存note的信息 sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit(); } else { Log.e(TAG, "Save introduction note error"); @@ -212,18 +223,21 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt startAsyncNotesListQuery(); } + // 初始化资源 private void initResources() { - mContentResolver = this.getContentResolver(); + mContentResolver = this.getContentResolver(); // 获取应用程序的数据，得到类似数据表的东西 mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver()); mCurrentFolderId = Notes.ID_ROOT_FOLDER; - mNotesListView = (ListView) findViewById(R.id.notes_list); + + // findViewById 是安卓编程的定位函数，主要是引用.R文件里的引用名 + mNotesListView = (ListView) findViewById(R.id.notes_list); // 绑定XML中的ListView，作为Item的容器 mNotesListView.addFooterView(LayoutInflater.from(this).inflate(R.layout.note_list_footer, null), null, false); mNotesListView.setOnItemClickListener(new OnListItemClickListener()); mNotesListView.setOnItemLongClickListener(this); mNotesListAdapter = new NotesListAdapter(this); mNotesListView.setAdapter(mNotesListAdapter); - mAddNewNote = (Button) findViewById(R.id.btn_new_note); + mAddNewNote = (Button) findViewById(R.id.btn_new_note);// 在activity中要获取该按钮 mAddNewNote.setOnClickListener(this); mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener()); mDispatch = false; @@ -234,10 +248,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt mModeCallBack = new ModeCallback(); } + // 继承自ListView.MultiChoiceModeListener 和 OnMenuItemClickListener private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener { - private DropdownMenu mDropDownMenu; + private DropdownMenu mDropDownMenu;//删除菜单 private ActionMode mActionMode; - private MenuItem mMoveMenu; + private MenuItem mMoveMenu;//移动菜单r public boolean onCreateActionMode(ActionMode mode, Menu menu) { getMenuInflater().inflate(R.menu.note_list_options, menu); @@ -262,7 +277,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt (Button) customView.findViewById(R.id.selection_menu), R.menu.note_list_dropdown); mDropDownMenu.setOnDropdownMenuItemClickListener(new PopupMenu.OnMenuItemClickListener(){ - public boolean onMenuItemClick(MenuItem item) { + public boolean onMenuItemClick(final MenuItem item) { mNotesListAdapter.selectAll(!mNotesListAdapter.isAllSelected()); updateMenu(); return true; @@ -272,19 +287,20 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt return true; } + // 更新菜单 private void updateMenu() { int selectedCount = mNotesListAdapter.getSelectedCount(); // Update dropdown menu String format = getResources().getString(R.string.menu_select_title, selectedCount); - mDropDownMenu.setTitle(format); + mDropDownMenu.setTitle(format); // 更改标题 MenuItem item = mDropDownMenu.findItem(R.id.action_select_all); if (item != null) { if (mNotesListAdapter.isAllSelected()) { item.setChecked(true); - item.setTitle(R.string.menu_deselect_all); + item.setTitle(R.string.menu_deselect_all);//判断是否已经遍历完所有输入 } else { item.setChecked(false); - item.setTitle(R.string.menu_select_all); + item.setTitle(R.string.menu_select_all);//判断是否已经遍历完所有输入 } } } @@ -303,14 +319,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt mNotesListAdapter.setChoiceMode(false); mNotesListView.setLongClickable(true); mAddNewNote.setVisibility(View.VISIBLE); - } + }//设置退出操作，设置选择模式 public void finishActionMode() { mActionMode.finish(); } public void onItemCheckedStateChanged(ActionMode mode, int position, long id, - boolean checked) { + boolean checked) { mNotesListAdapter.setCheckedItem(position, checked); updateMenu(); } @@ -328,14 +344,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt builder.setTitle(getString(R.string.alert_title_delete)); builder.setIcon(android.R.drawable.ic_dialog_alert); builder.setMessage(getString(R.string.alert_message_delete_notes, - mNotesListAdapter.getSelectedCount())); + mNotesListAdapter.getSelectedCount())); builder.setPositiveButton(android.R.string.ok, - new DialogInterface.OnClickListener() { - public void onClick(DialogInterface dialog, - int which) { - batchDelete(); - } - }); + new DialogInterface.OnClickListener() { + public void onClick(DialogInterface dialog, + int which) { + batchDelete(); + } + }); builder.setNegativeButton(android.R.string.cancel, null); builder.show(); break; @@ -369,7 +385,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt /** * HACKME:When click the transparent part of "New Note" button, dispatch * the event to the list view behind this button. The transparent part of - * "New Note" button could be expressed by formula y=-0.12x+94（Unit:pixel） + * "New Note" button could be expressed by formula y=-0.12x+94锛圲nit:pixel锛� * and the line top of the button. The coordinate based on left of the "New * Note" button. The 94 represents maximum height of the transparent part. * Notice that, if the background of the button changes, the formula should @@ -416,7 +432,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt : NORMAL_SELECTION; mBackgroundQueryHandler.startQuery(FOLDER_NOTE_LIST_QUERY_TOKEN, null, Notes.CONTENT_NOTE_URI, NoteItemData.PROJECTION, selection, new String[] { - String.valueOf(mCurrentFolderId) + String.valueOf(mCurrentFolderId) }, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC"); } @@ -627,7 +643,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt values.put(NoteColumns.LOCAL_MODIFIED, 1); mContentResolver.update(Notes.CONTENT_NOTE_URI, values, NoteColumns.ID + "=?", new String[] { - String.valueOf(mFocusNoteDataItem.getId()) + String.valueOf(mFocusNoteDataItem.getId()) }); } } else if (!TextUtils.isEmpty(name)) { @@ -667,30 +683,38 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt }); } + /* (non-Javadoc) + * @see android.app.Activity#onBackPressed() + * 按返回键时根据情况更改类中的数据 + */ @Override - public void onBackPressed() { - switch (mState) { - case SUB_FOLDER: - mCurrentFolderId = Notes.ID_ROOT_FOLDER; - mState = ListEditState.NOTE_LIST; - startAsyncNotesListQuery(); - mTitleBar.setVisibility(View.GONE); - break; - case CALL_RECORD_FOLDER: - mCurrentFolderId = Notes.ID_ROOT_FOLDER; - mState = ListEditState.NOTE_LIST; - mAddNewNote.setVisibility(View.VISIBLE); - mTitleBar.setVisibility(View.GONE); - startAsyncNotesListQuery(); - break; - case NOTE_LIST: - super.onBackPressed(); - break; - default: - break; - } + public void onBackPressed() { switch (mState) { + case SUB_FOLDER: + mCurrentFolderId = Notes.ID_ROOT_FOLDER; + mState = ListEditState.NOTE_LIST; + startAsyncNotesListQuery(); + mTitleBar.setVisibility(View.GONE); + break; + case CALL_RECORD_FOLDER: + mCurrentFolderId = Notes.ID_ROOT_FOLDER; + mState = ListEditState.NOTE_LIST; + mAddNewNote.setVisibility(View.VISIBLE); + mTitleBar.setVisibility(View.GONE); + startAsyncNotesListQuery(); + break; + case NOTE_LIST: + super.onBackPressed(); + break; + default: + break; + } } + /** + * @param appWidgetId + * @param appWidgetType + * 根据不同类型的widget更新插件，通过intent传送数据 + */ private void updateWidget(int appWidgetId, int appWidgetType) { Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); if (appWidgetType == Notes.TYPE_WIDGET_2X) { @@ -703,13 +727,16 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt } intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] { - appWidgetId + appWidgetId }); sendBroadcast(intent); setResult(RESULT_OK, intent); } + /** + * 声明监听器，建立菜单，包括名称，视图，删除操作，更改名称操作； + */ private final OnCreateContextMenuListener mFolderOnCreateContextMenuListener = new OnCreateContextMenuListener() { public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { if (mFocusNoteDataItem != null) { @@ -729,6 +756,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt super.onContextMenuClosed(menu); } + /* (non-Javadoc) + * @see android.app.Activity#onContextItemSelected(android.view.MenuItem) + * 针对menu中不同的选择进行不同的处理，里面详细注释 + */ @Override public boolean onContextItemSelected(MenuItem item) { if (mFocusNoteDataItem == null) { @@ -737,10 +768,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt } switch (item.getItemId()) { case MENU_FOLDER_VIEW: - openFolder(mFocusNoteDataItem); + openFolder(mFocusNoteDataItem);//打开对应文件 break; case MENU_FOLDER_DELETE: - AlertDialog.Builder builder = new AlertDialog.Builder(this); + AlertDialog.Builder builder = new AlertDialog.Builder(this);//设置确认是否删除的对话框 builder.setTitle(getString(R.string.alert_title_delete)); builder.setIcon(android.R.drawable.ic_dialog_alert); builder.setMessage(getString(R.string.alert_message_delete_folder)); @@ -751,7 +782,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt } }); builder.setNegativeButton(android.R.string.cancel, null); - builder.show(); + builder.show();//显示对话框 break; case MENU_FOLDER_CHANGE_NAME: showCreateOrModifyFolderDialog(false); @@ -821,12 +852,19 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt return true; } + /* (non-Javadoc) + * @see android.app.Activity#onSearchRequested() + * 直接调用startSearch函数 + */ @Override public boolean onSearchRequested() { startSearch(null, false, null /* appData */, false); return true; } + /** + * 函数功能：实现将便签导出到文本功能 + */ private void exportNoteToText() { final BackupUtils backup = BackupUtils.getInstance(NotesListActivity.this); new AsyncTask() { @@ -869,16 +907,27 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt }.execute(); } + /** + * @return + * 功能：判断是否正在同步 + */ private boolean isSyncMode() { return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0; } + /** + * 功能：跳转到PreferenceActivity界面 + */ private void startPreferenceActivity() { Activity from = getParent() != null ? getParent() : this; Intent intent = new Intent(from, NotesPreferenceActivity.class); from.startActivityIfNeeded(intent, -1); } + /** + * @author k + * 函数功能：实现对便签列表项的点击事件（短按） + */ private class OnListItemClickListener implements OnItemClickListener { public void onItemClick(AdapterView parent, View view, int position, long id) { @@ -920,10 +969,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt } + /** + * 查询目标文件 + */ private void startQueryDestinationFolders() { String selection = NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>? AND " + NoteColumns.ID + "<>?"; selection = (mState == ListEditState.NOTE_LIST) ? selection: - "(" + selection + ") OR (" + NoteColumns.ID + "=" + Notes.ID_ROOT_FOLDER + ")"; + "(" + selection + ") OR (" + NoteColumns.ID + "=" + Notes.ID_ROOT_FOLDER + ")"; mBackgroundQueryHandler.startQuery(FOLDER_LIST_QUERY_TOKEN, null, @@ -938,6 +990,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt NoteColumns.MODIFIED_DATE + " DESC"); } + /* (non-Javadoc) + * @see android.widget.AdapterView.OnItemLongClickListener#onItemLongClick(android.widget.AdapterView, android.view.View, int, long) + * 长按某一项时进行的操作 + * 如果长按的是便签，则通过ActionMode菜单实现；如果长按的是文件夹，则通过ContextMenu菜单实现； + * 具体ActionMOde菜单和ContextMenu菜单的详细见精度笔记 + */ public boolean onItemLongClick(AdapterView parent, View view, int position, long id) { if (view instanceof NotesListItem) { mFocusNoteDataItem = ((NotesListItem) view).getItemData();