From 66d6dc258adf259cc18372a70162637577d3e881 Mon Sep 17 00:00:00 2001 From: py8eu7phk <1848405884@qq.com> Date: Fri, 15 Dec 2023 17:58:06 +0800 Subject: [PATCH] ADD file via upload --- doc/Notes.java | 295 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 295 insertions(+) create mode 100644 doc/Notes.java diff --git a/doc/Notes.java b/doc/Notes.java new file mode 100644 index 0000000..0ac1991 --- /dev/null +++ b/doc/Notes.java @@ -0,0 +1,295 @@ +王希宁 2023317170 +public class BackupUtils { + private static final String TAG = "BackupUtils"; + // 单例模式相关 + private static BackupUtils sInstance; + + public static synchronized BackupUtils getInstance(Context context) { + if (sInstance == null) { + sInstance = new BackupUtils(context); + } + return sInstance; + } + + /** + * 以下状态用于表示备份或恢复的状态 + */ + // 当前，SD卡未挂载 + public static final int STATE_SD_CARD_UNMOUNTED = 0; + // 备份文件不存在 + public static final int STATE_BACKUP_FILE_NOT_EXIST = 1; + // 数据格式不正确，可能被其他程序更改 + public static final int STATE_DATA_DESTROYED = 2; + // 由于运行时异常导致恢复或备份失败 + public static final int STATE_SYSTEM_ERROR = 3; + // 备份或恢复成功 + public static final int STATE_SUCCESS = 4; + + private TextExport mTextExport; + + private BackupUtils(Context context) { + mTextExport = new TextExport(context); + } + + private static boolean externalStorageAvailable() { + return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()); + } + + public int exportToText() { + return mTextExport.exportToText(); + } + + public String getExportedTextFileName() { + return mTextExport.mFileName; + } + + public String getExportedTextFileDir() { + return mTextExport.mFileDirectory; + } +} +``````java +private static class TextExport { + private static final String[] NOTE_PROJECTION = { + NoteColumns.ID, + NoteColumns.MODIFIED_DATE, + NoteColumns.SNIPPET, + NoteColumns.TYPE + }; + + private static final int NOTE_COLUMN_ID = 0; + + private static final int NOTE_COLUMN_MODIFIED_DATE = 1; + + private static final int NOTE_COLUMN_SNIPPET = 2; + + private static final String[] DATA_PROJECTION = { + DataColumns.CONTENT, + DataColumns.MIME_TYPE, + DataColumns.DATA1, + DataColumns.DATA2, + DataColumns.DATA3, + DataColumns.DATA4, + }; + + private static final int DATA_COLUMN_CONTENT = 0; + + private static final int DATA_COLUMN_MIME_TYPE = 1; + + private static final int DATA_COLUMN_CALL_DATE = 2; + + private static final int DATA_COLUMN_PHONE_NUMBER = 4; + + private final String[] TEXT_FORMAT; + private static final int FORMAT_FOLDER_NAME = 0; + private static final int FORMAT_NOTE_DATE = 1; + private static final int FORMAT_NOTE_CONTENT = 2; + + private Context mContext; + private String mFileName; + private String mFileDirectory; + + public TextExport(Context context) { + TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note); + mContext = context; + mFileName = ""; + mFileDirectory = ""; + } + + private String getFormat(int id) { + return TEXT_FORMAT[id]; + } + + /** + * 将由文件夹ID标识的文件夹导出为文本 + */ + private void exportFolderToText(String folderId, PrintStream ps) { + // 查询属于此文件夹的笔记 + Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI, + NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[]{ + folderId + }, null); + + if (notesCursor != null) { + if (notesCursor.moveToFirst()) { + do { + // 打印笔记的最后修改日期 + ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format( + mContext.getString(R.string.format_datetime_mdhm), + notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE)))); + // 查询属于此笔记的数据 + String noteId = notesCursor.getString(NOTE_COLUMN_ID); + exportNoteToText(noteId, ps); + } while (notesCursor.moveToNext()); + } + notesCursor.close(); + } + } +} +``````java + } + folderCursor.close(); + } + // 关闭游标 + folderCursor.close(); + } + + return STATE_SUCCESS; +} + +/** + * 检查外部存储是否可用 + */ +private boolean externalStorageAvailable() { + String state = Environment.getExternalStorageState(); + return Environment.MEDIA_MOUNTED.equals(state); +} + +/** + * 获取导出到文本的打印流 + */ +private PrintStream getExportToTextPrintStream() { + try { + File exportFile = new File(mFileDirectory, mFileName); + FileOutputStream fileOutputStream = new FileOutputStream(exportFile); + return new PrintStream(fileOutputStream); + } catch (FileNotFoundException e) { + Log.e(TAG, e.toString()); + return null; + } +} + +/** + * 导出文件夹和其笔记到文本 + */ +private void exportFolderToText(String folderId, PrintStream ps) { + // 查询属于此文件夹的笔记 + Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI, + NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[]{ + folderId + }, null); + + if (notesCursor != null) { + if (notesCursor.moveToFirst()) { + do { + // 打印笔记的最后修改日期 + ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format( + mContext.getString(R.string.format_datetime_mdhm), + notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE)))); + // 查询属于此笔记的数据 + String noteId = notesCursor.getString(NOTE_COLUMN_ID); + exportNoteToText(noteId, ps); + } while (notesCursor.moveToNext()); + } + notesCursor.close(); + } +} + +/** + * 导出由id标识的笔记到打印流 + */ +private void exportNoteToText(String noteId, PrintStream ps) { + Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, + DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] { + noteId + }, null); + + if (dataCursor != null) { + if (dataCursor.moveToFirst()) { + do { + String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE); + if (DataConstants.CALL_NOTE.equals(mimeType)) { + // 打印电话号码 + String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER); + long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE); + String location = dataCursor.getString(DATA_COLUMN_CONTENT); + + if (!TextUtils.isEmpty(phoneNumber)) { + ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), + phoneNumber)); + } + // 打印通 +```java +// 导出根文件夹中的笔记 +Cursor noteCursor = mContext.getContentResolver().query( + Notes.CONTENT_NOTE_URI, + NOTE_PROJECTION, + NoteColumns.TYPE + "=" + +Notes.TYPE_NOTE + " AND " + NoteColumns.PARENT_ID + + "=0", null, null); + +if (noteCursor != null) { + if (noteCursor.moveToFirst()) { + do { + ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format( + mContext.getString(R.string.format_datetime_mdhm), + noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE)))); + // 查询属于此笔记的数据 + String noteId = noteCursor.getString(NOTE_COLUMN_ID); + exportNoteToText(noteId, ps); + } while (noteCursor.moveToNext()); + } + noteCursor.close(); +} +ps.close(); + +return STATE_SUCCESS; +} + +/** + * 获取指向文件{@generateExportedTextFile}的打印流 + */ +private PrintStream getExportToTextPrintStream() { +File file = generateFileMountedOnSDcard(mContext, R.string.file_path, + R.string.file_name_txt_format); +if (file == null) { + Log.e(TAG, "创建要导出的文件失败"); + return null; +} +mFileName = file.getName(); +mFileDirectory = mContext.getString(R.string.file_path); +PrintStream ps = null; +try { + FileOutputStream fos = new FileOutputStream(file); + ps = new PrintStream(fos); +} catch (FileNotFoundException e) { + e.printStackTrace(); + return null; +} catch (NullPointerException e) { + e.printStackTrace(); + return null; +} +return ps; +} +} + +/** + * 生成文本文件以存储导入的数据 + */ +private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) { +StringBuilder sb = new StringBuilder(); +sb.append(Environment.getExternalStorageDirectory()); +sb.append(context.getString(filePathResId)); +File filedir = new File(sb.toString()); +sb.append(context.getString( + fileNameFormatResId, + DateFormat.format(context.getString(R.string.format_date_ymd), + System.currentTimeMillis()))); +File file = new File(sb.toString()); + +try { + if (!filedir.exists()) { + filedir.mkdir(); + } + if (!file.exists()) { + file.createNewFile(); + } + return file; +} catch (SecurityException e) { + e.printStackTrace(); +} catch (IOException e) { + e.printStackTrace(); +} + +return null; +} +} +``` \ No newline at end of file