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README.md
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# xiaomi

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src/model/Note.java
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package net.micode.notes.model;
import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.OperationApplicationException;
import android.net.Uri;
import android.os.RemoteException;
import android.util.Log;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.CallNote;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.data.Notes.TextNote;
import java.util.ArrayList;
public class Note {
private ContentValues mNoteDiffValues;
private NoteData mNoteData;
private static final String TAG = "Note";
/**
* Create a new note id for adding a new note to databases
*/
public static synchronized long getNewNoteId(Context context, long folderId) {
// Create a new note in the database
ContentValues values = new ContentValues();
long createdTime = System.currentTimeMillis();
values.put(NoteColumns.CREATED_DATE, createdTime);
values.put(NoteColumns.MODIFIED_DATE, createdTime);
values.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
values.put(NoteColumns.LOCAL_MODIFIED, 1);
values.put(NoteColumns.PARENT_ID, folderId);
Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);
long noteId = 0;
try {
noteId = Long.valueOf(uri.getPathSegments().get(1));
} catch (NumberFormatException e) {
Log.e(TAG, "Get note id error :" + e.toString());
noteId = 0;
}
if (noteId == -1) {
throw new IllegalStateException("Wrong note id:" + noteId);
}
return noteId;
}
public Note() {
mNoteDiffValues = new ContentValues();
mNoteData = new NoteData();
}
public void setNoteValue(String key, String value) {
mNoteDiffValues.put(key, value);
mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
}
public void setTextData(String key, String value) {
mNoteData.setTextData(key, value);
}
public void setTextDataId(long id) {
mNoteData.setTextDataId(id);
}
public long getTextDataId() {
return mNoteData.mTextDataId;
}
public void setCallDataId(long id) {
mNoteData.setCallDataId(id);
}
public void setCallData(String key, String value) {
mNoteData.setCallData(key, value);
}
public boolean isLocalModified() {
return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();
}
public boolean syncNote(Context context, long noteId) {
if (noteId <= 0) {
throw new IllegalArgumentException("Wrong note id:" + noteId);
}
if (!isLocalModified()) {
return true;
}
/**
* In theory, once data changed, the note should be updated on {@link NoteColumns#LOCAL_MODIFIED} and
* {@link NoteColumns#MODIFIED_DATE}. For data safety, though update note fails, we also update the
* note data info
*/
if (context.getContentResolver().update(
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), mNoteDiffValues, null,
null) == 0) {
Log.e(TAG, "Update note error, should not happen");
// Do not return, fall through
}
mNoteDiffValues.clear();
if (mNoteData.isLocalModified()
&& (mNoteData.pushIntoContentResolver(context, noteId) == null)) {
return false;
}
return true;
}
private class NoteData {
private long mTextDataId;
private ContentValues mTextDataValues;
private long mCallDataId;
private ContentValues mCallDataValues;
private static final String TAG = "NoteData";
public NoteData() {
mTextDataValues = new ContentValues();
mCallDataValues = new ContentValues();
mTextDataId = 0;
mCallDataId = 0;
}
boolean isLocalModified() {
return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;
}
void setTextDataId(long id) {
if(id <= 0) {
throw new IllegalArgumentException("Text data id should larger than 0");
}
mTextDataId = id;
}
void setCallDataId(long id) {
if (id <= 0) {
throw new IllegalArgumentException("Call data id should larger than 0");
}
mCallDataId = id;
}
void setCallData(String key, String value) {
mCallDataValues.put(key, value);
mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
}
void setTextData(String key, String value) {
mTextDataValues.put(key, value);
mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
}
Uri pushIntoContentResolver(Context context, long noteId) {
/**
* Check for safety
*/
if (noteId <= 0) {
throw new IllegalArgumentException("Wrong note id:" + noteId);
}
ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
ContentProviderOperation.Builder builder = null;
if(mTextDataValues.size() > 0) {
mTextDataValues.put(DataColumns.NOTE_ID, noteId);
if (mTextDataId == 0) {
mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE);
Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
mTextDataValues);
try {
setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));
} catch (NumberFormatException e) {
Log.e(TAG, "Insert new text data fail with noteId" + noteId);
mTextDataValues.clear();
return null;
}
} else {
builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
Notes.CONTENT_DATA_URI, mTextDataId));
builder.withValues(mTextDataValues);
operationList.add(builder.build());
}
mTextDataValues.clear();
}
if(mCallDataValues.size() > 0) {
mCallDataValues.put(DataColumns.NOTE_ID, noteId);
if (mCallDataId == 0) {
mCallDataValues.put(DataColumns.MIME_TYPE, CallNote.CONTENT_ITEM_TYPE);
Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
mCallDataValues);
try {
setCallDataId(Long.valueOf(uri.getPathSegments().get(1)));
} catch (NumberFormatException e) {
Log.e(TAG, "Insert new call data fail with noteId" + noteId);
mCallDataValues.clear();
return null;
}
} else {
builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
Notes.CONTENT_DATA_URI, mCallDataId));
builder.withValues(mCallDataValues);
operationList.add(builder.build());
}
mCallDataValues.clear();
}
if (operationList.size() > 0) {
try {
ContentProviderResult[] results = context.getContentResolver().applyBatch(
Notes.AUTHORITY, operationList);
return (results == null || results.length == 0 || results[0] == null) ? null
: ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId);
} catch (RemoteException e) {
Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
return null;
} catch (OperationApplicationException e) {
Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
return null;
}
}
return null;
}
}
}

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src/model/WorkingNote.java
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package net.micode.notes.model;
import android.appwidget.AppWidgetManager;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.text.TextUtils;
import android.util.Log;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.CallNote;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.data.Notes.TextNote;
import net.micode.notes.tool.ResourceParser.NoteBgResources;
public class WorkingNote {
// Note for the working note
private Note mNote;
// Note Id
private long mNoteId;
// Note content
private String mContent;
// Note mode
private int mMode;
private long mAlertDate;
private long mModifiedDate;
private int mBgColorId;
private int mWidgetId;
private int mWidgetType;
private long mFolderId;
private Context mContext;
private static final String TAG = "WorkingNote";
private boolean mIsDeleted;
private NoteSettingChangedListener mNoteSettingStatusListener;
public static final String[] DATA_PROJECTION = new String[] {
DataColumns.ID,
DataColumns.CONTENT,
DataColumns.MIME_TYPE,
DataColumns.DATA1,
DataColumns.DATA2,
DataColumns.DATA3,
DataColumns.DATA4,
};
public static final String[] NOTE_PROJECTION = new String[] {
NoteColumns.PARENT_ID,
NoteColumns.ALERTED_DATE,
NoteColumns.BG_COLOR_ID,
NoteColumns.WIDGET_ID,
NoteColumns.WIDGET_TYPE,
NoteColumns.MODIFIED_DATE
};
private static final int DATA_ID_COLUMN = 0;
private static final int DATA_CONTENT_COLUMN = 1;
private static final int DATA_MIME_TYPE_COLUMN = 2;
private static final int DATA_MODE_COLUMN = 3;
private static final int NOTE_PARENT_ID_COLUMN = 0;
private static final int NOTE_ALERTED_DATE_COLUMN = 1;
private static final int NOTE_BG_COLOR_ID_COLUMN = 2;
private static final int NOTE_WIDGET_ID_COLUMN = 3;
private static final int NOTE_WIDGET_TYPE_COLUMN = 4;
private static final int NOTE_MODIFIED_DATE_COLUMN = 5;
// New note construct
private WorkingNote(Context context, long folderId) {//定义了一个私有构造函数，接受context和long类型的folderid作为参数。
mContext = context;//将传入的上下文赋值给类的成员变量mcontext
mAlertDate = 0;//将提醒日期初始化为0，表示当前没有设置提醒。
mModifiedDate = System.currentTimeMillis();//获取当前时间戳，并赋值给mmodifieddate，用于记录笔记的修改时间
mFolderId = folderId;
mNote = new Note();//创建一个类的实例并赋值
mNoteId = 0;//初始化为零
mIsDeleted = false;
mMode = 0;
mWidgetType = Notes.TYPE_WIDGET_INVALIDE;//将小部件类型设置为无效类型，表明当前笔记关联的小部件状态无效。
}
// Existing note construct
private WorkingNote(Context context, long noteId, long folderId) {
mContext = context;
mNoteId = noteId;//明确初始化
mFolderId = folderId;
mIsDeleted = false;
mNote = new Note();
loadNote();//此时mnoteid已可用
}
private void loadNote() {//定义了一个私有的方法
Cursor cursor = mContext.getContentResolver().query(
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
null, null);//定义好的表示笔记数据的内容URI，将mnoteid附加到该URI上，形成一个特定笔记的查询URI，都设null表示不指定额外条件和排序，查询结果会返回一个cursor对象，用于遍历查询得到的数据行
if (cursor != null) {//判断查询结果
if (cursor.moveToFirst()) {//将游标移动到查询结果集的第一行，若成功则进入这个if块执行后续操作
mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN);
mBgColorId = cursor.getInt(NOTE_BG_COLOR_ID_COLUMN);
mWidgetId = cursor.getInt(NOTE_WIDGET_ID_COLUMN);
mWidgetType = cursor.getInt(NOTE_WIDGET_TYPE_COLUMN);
mAlertDate = cursor.getLong(NOTE_ALERTED_DATE_COLUMN);
mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN);//从查询结果的当前行中获取不同属性的值，并赋值给类的相应成员变量
}
cursor.close();
} else {
Log.e(TAG, "No note with id:" + mNoteId);
throw new IllegalArgumentException("Unable to find note with id " + mNoteId);//若返回说明查询结果集为空，此时通过Log.e方法打印错误日志，然后抛出异常，提示找不到指定的ID笔记
}
loadNoteData();
}
private void loadNoteData() {//定义了一个私有方法
Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
DataColumns.NOTE_ID + "=?", new String[] {
String.valueOf(mNoteId)
}, null);//表示数据所在的位置，指定要从查询结果中返回的列，查询NOTE-ID列等于某个值的记录，？会被后面的参数替换
if (cursor != null) {//查询是否为空
if (cursor.moveToFirst()) {
do {
String type = cursor.getString(DATA_MIME_TYPE_COLUMN);//从当前行获取数据的MIME类型，存储在type变量中
if (DataConstants.NOTE.equals(type)) {
mContent = cursor.getString(DATA_CONTENT_COLUMN);//获取笔记内容并赋值给mcontent
mMode = cursor.getInt(DATA_MODE_COLUMN);//获取笔记内容并赋值
mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN));//从当前行获取数据ID并设置到mnote对象中
} else if (DataConstants.CALL_NOTE.equals(type)) {
mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN));//判断如果是通话笔记类型，则获取数据ID并设置到mnote对象的数据ID属性中
} else {
Log.d(TAG, "Wrong note type with type:" + type);
}
} while (cursor.moveToNext());
}
cursor.close();
} else {
Log.e(TAG, "No data with id:" + mNoteId);
throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId);
}
}//若查询结果集为空，没有找到对性的mnoteid的数据，此时提示找不到指定的ID的笔记数据
public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,
int widgetType, int defaultBgColorId) {
WorkingNote note = new WorkingNote(context, folderId);
note.setBgColorId(defaultBgColorId);
note.setWidgetId(widgetId);
note.setWidgetType(widgetType);
return note;
}//创建一个空的workingnote对象分别调用三种方法，设置笔记的背景颜色ID,小部件ID和小部件类型
public static WorkingNote load(Context context, long id) {
return new WorkingNote(context, id, 0);
}//接收context和id作为参数，直接通过调用对应的构造函数创建并返回一个working note对象，这三个参数含义需结合构造函数具体逻辑确定，推测可能是默认的文件夹id或其他默认标识
public synchronized boolean saveNote() {
if (isWorthSaving()) {
if (!existInDatabase()) {
if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {
Log.e(TAG, "Create new note fail with id:" + mNoteId);
return false;
}
}
mNote.syncNote(mContext, mNoteId);
/**
* Update widget content if there exist any widget of this note
*/
if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
&& mWidgetType != Notes.TYPE_WIDGET_INVALIDE
&& mNoteSettingStatusListener != null) {
mNoteSettingStatusListener.onWidgetChanged();
}
return true;
} else {
return false;
}//判断笔记是否值得保存，接着判断笔记是否已存在于数据库中，如果不存在，调用函数获取一个新的笔记ID，并赋值给mnoteid，若获取id为0，说明创建笔记id失败，之后并将笔记数据同步到数据库
}
public boolean existInDatabase() {
return mNoteId > 0;
}//判断成员变量mnotedid是否大于0来确定，大于0则认为存在于数据库，直接返回该判断结果
private boolean isWorthSaving() {
if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent))
|| (existInDatabase() && !mNote.isLocalModified())) {
return false;
} else {
return true;
}
}//通过多个条件组合判断，若满足任一条件则返回false，表示不值得保存
public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) {
mNoteSettingStatusListener = l;
}//接受一个类型的参数1，并将其赋值给成员变量，以便在相关设置状态改变时出发监听器的方法
public void setAlertDate(long date, boolean set) {
if (date != mAlertDate) {
mAlertDate = date;
mNote.setNoteValue(NoteColumns.ALERTED_DATE, String.valueOf(mAlertDate));
}
if (mNoteSettingStatusListener != null) {
mNoteSettingStatusListener.onClockAlertChanged(date, set);
}
}//判断传入日期与当前记录的提醒日期是否不同，若不同，将提醒日期更新传入date，检查是否为空，若不为空调用其方法，通过监听器提醒日期已改变，并传入新日期和设置标识
public void markDeleted(boolean mark) {
mIsDeleted = mark;
if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
&& mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) {
mNoteSettingStatusListener.onWidgetChanged();
}
}//用于标识笔记是否已删除，并在满足特定条件时通知监听器
public void setBgColorId(int id) {
if (id != mBgColorId) {
mBgColorId = id;
if (mNoteSettingStatusListener != null) {
mNoteSettingStatusListener.onBackgroundColorChanged();
}
mNote.setNoteValue(NoteColumns.BG_COLOR_ID, String.valueOf(id));
}
}//用于设置笔记的背景ID并在必要时通知监听器以及更新笔记数据
public void setCheckListMode(int mode) {
if (mMode != mode) {
if (mNoteSettingStatusListener != null) {
mNoteSettingStatusListener.onCheckListModeChanged(mMode, mode);
}
mMode = mode;
mNote.setTextData(TextNote.MODE, String.valueOf(mMode));
}
}//用于设置笔记的清单模式，并在必要时通知监听器以及更新笔记数据
public void setWidgetType(int type) {
if (type != mWidgetType) {
mWidgetType = type;
mNote.setNoteValue(NoteColumns.WIDGET_TYPE, String.valueOf(mWidgetType));
}
}//用于设置笔记关联小部件的类型
public void setWidgetId(int id) {
if (id != mWidgetId) {
mWidgetId = id;
mNote.setNoteValue(NoteColumns.WIDGET_ID, String.valueOf(mWidgetId));
}
}//用于设置笔记关联小部件的ID
public void setWorkingText(String text) {
if (!TextUtils.equals(mContent, text)) {
mContent = text;
mNote.setTextData(DataColumns.CONTENT, mContent);
}
}//用于设置笔记的文本内容
public void convertToCallNote(String phoneNumber, long callDate) {
mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate));
mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber);
mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER));
}//将当前笔记转换为通话笔记设置相关通话信息
public boolean hasClockAlert() {
return (mAlertDate > 0 ? true : false);
}
public String getContent() {
return mContent;
}
public long getAlertDate() {
return mAlertDate;
}
public long getModifiedDate() {
return mModifiedDate;
}
public int getBgColorResId() {
return NoteBgResources.getNoteBgResource(mBgColorId);
}
public int getBgColorId() {
return mBgColorId;
}
public int getTitleBgResId() {
return NoteBgResources.getNoteTitleBgResource(mBgColorId);
}
public int getCheckListMode() {
return mMode;
}
public long getNoteId() {
return mNoteId;
}
public long getFolderId() {
return mFolderId;
}
public int getWidgetId() {
return mWidgetId;
}
public int getWidgetType() {
return mWidgetType;
}
public interface NoteSettingChangedListener {
/**
* Called when the background color of current note has just changed
*/
void onBackgroundColorChanged();
/**
* Called when user set clock
*/
void onClockAlertChanged(long date, boolean set);
/**
* Call when user create note from widget
*/
void onWidgetChanged();
/**
* Call when switch between check list mode and normal mode
* @param oldMode is previous mode before change
* @param newMode is new mode
*/
void onCheckListModeChanged(int oldMode, int newMode);
}
}

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src/widget/NoteWidgetProvider.java
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/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* 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.
*/
//这段代码是一个Android App Widget的抽象基类NotewidgetProvider,用于管理笔记类小部件的通用逻辑，支持不同尺寸和样式的小部件2x、4x
/*这段代码是笔记类小部件的核心实现，通过抽象基类统一管理数据绑定和交互逻辑，
子类只需关注布局和资源的差异化。其设计体现了高内聚、低耦合的原则，
适合扩展多尺寸小部件。实际使用时需确保数据库查询的效率和线程安全。*/
package net.micode.notes.widget;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.util.Log;
import android.widget.RemoteViews;
import net.micode.notes.R;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.tool.ResourceParser;
import net.micode.notes.ui.NoteEditActivity;
import net.micode.notes.ui.NotesListActivity;
public abstract class NoteWidgetProvider extends AppWidgetProvider {
public static final String [] PROJECTION = new String [] {
NoteColumns.ID,
NoteColumns.BG_COLOR_ID,
NoteColumns.SNIPPET
};
public static final int COLUMN_ID = 0;
public static final int COLUMN_BG_COLOR_ID = 1;
public static final int COLUMN_SNIPPET = 2;
private static final String TAG = "NoteWidgetProvider";
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
ContentValues values = new ContentValues();
values.put(NoteColumns.WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
for (int i = 0; i < appWidgetIds.length; i++) {
context.getContentResolver().update(Notes.CONTENT_NOTE_URI,
values,
NoteColumns.WIDGET_ID + "=?",
new String[] { String.valueOf(appWidgetIds[i])});
}
}//当小部件删除时，清除数据库中关联的widgetId
private Cursor getNoteWidgetInfo(Context context, int widgetId) {
return context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
PROJECTION,
NoteColumns.WIDGET_ID + "=? AND " + NoteColumns.PARENT_ID + "<>?",
new String[] { String.valueOf(widgetId), String.valueOf(Notes.ID_TRASH_FOLER) },
null);
}//根据widgetId查询关联的笔记数据，排除已放入垃圾桶的笔记
protected void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
update(context, appWidgetManager, appWidgetIds, false);
}
private void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds,
boolean privacyMode) {
for (int i = 0; i < appWidgetIds.length; i++) {
if (appWidgetIds[i] != AppWidgetManager.INVALID_APPWIDGET_ID) {
//初始化默认值
int bgId = ResourceParser.getDefaultBgId(context);
String snippet = "";
Intent intent = new Intent(context, NoteEditActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
intent.putExtra(Notes.INTENT_EXTRA_WIDGET_ID, appWidgetIds[i]);
intent.putExtra(Notes.INTENT_EXTRA_WIDGET_TYPE, getWidgetType());
//查询数据库获取笔记数据
Cursor c = getNoteWidgetInfo(context, appWidgetIds[i]);
if (c != null && c.moveToFirst()) {
if (c.getCount() > 1) {
Log.e(TAG, "Multiple message with same widget id:" + appWidgetIds[i]);
c.close();
return;
}
snippet = c.getString(COLUMN_SNIPPET);
bgId = c.getInt(COLUMN_BG_COLOR_ID);
intent.putExtra(Intent.EXTRA_UID, c.getLong(COLUMN_ID));
intent.setAction(Intent.ACTION_VIEW);
} else {
snippet = context.getResources().getString(R.string.widget_havenot_content);
intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
}
if (c != null) {
c.close();
}
//构建RemoteViews
RemoteViews rv = new RemoteViews(context.getPackageName(), getLayoutId());
rv.setImageViewResource(R.id.widget_bg_image, getBgResourceId(bgId));
intent.putExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, bgId);
/**
* Generate the pending intent to start host for the widget
*/
//设置点击事件
PendingIntent pendingIntent = null;
if (privacyMode) {
rv.setTextViewText(R.id.widget_text,
context.getString(R.string.widget_under_visit_mode));
pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], new Intent(
context, NotesListActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
} else {
rv.setTextViewText(R.id.widget_text, snippet);
pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent,
PendingIntent.FLAG_UPDATE_CURRENT);
}
rv.setOnClickPendingIntent(R.id.widget_text, pendingIntent);
//更新小部件
appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
}
}
}
protected abstract int getBgResourceId(int bgId);
//获取背景资源
protected abstract int getLayoutId();
//获取布局文件
protected abstract int getWidgetType();
//获取小部件类型
}

37
src/widget/NoteWidgetProvider_2x.java
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@ -1,37 +0,0 @@
//主要功能包括：
//指定2x小部件使用布局
//提供2x小部件专用的背景资源
//标识小部件类型为2x尺寸
//处理小部件更新逻辑
package net.micode.notes.widget;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import net.micode.notes.R;
import net.micode.notes.data.Notes;
import net.micode.notes.tool.ResourceParser;
public class NoteWidgetProvider_2x extends NoteWidgetProvider {//继承自NotewidgetProvider，专门处理2x尺寸的小部件
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
super.update(context, appWidgetManager, appWidgetIds);
}//这是APP widget 的核心方法，当小部件需要更新时调用，直接调用父类的update方法更新逻辑
@Override
protected int getLayoutId() {
return R.layout.widget_2x;
}//返回2x尺寸小部件使用布局资源ID（R.layout.widget_2x)
@Override
protected int getBgResourceId(int bgId) {
return ResourceParser.WidgetBgResources.getWidget2xBgResource(bgId);
}//根据背景ID返回对应的2X尺寸资源
@Override
protected int getWidgetType() {
return Notes.TYPE_WIDGET_2X;
}//用于标识这个2x尺寸的小部件
}

43
src/widget/NoteWidgetProvider_4x.java
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@ -1,43 +0,0 @@
/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
*
* 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.
*/
//这段代码是一个 Android App Widget （应用小部件）的提供者类，专门用于处理 4x 尺寸的笔记小部件
//(NotewidgetProvider_4x)。它是NotewidgetProvider 的子类，主要功能是为 4x 尺寸的小部件提供特定的布局、背景资源和类型标识
package net.micode.notes.widget;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import net.micode.notes.R;
import net.micode.notes.data.Notes;
import net.micode.notes.tool.ResourceParser;
public class NoteWidgetProvider_4x extends NoteWidgetProvider {
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
super.update(context, appWidgetManager, appWidgetIds);
}//当小部件需要更新时调用，直接委托父类处理逻辑
protected int getLayoutId() {
return R.layout.widget_4x;
}//返回4x小部件的布局文件R.layout.widget_4x,定义界面结构
@Override
protected int getBgResourceId(int bgId) {
return ResourceParser.WidgetBgResources.getWidget4xBgResource(bgId);
}//根据背景ID返回对应的4X尺寸背景资源
@Override
protected int getWidgetType() {
return Notes.TYPE_WIDGET_4X;
}//返回常量Notes.TYPE_WIDGET_4x
}
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