zuo_branch
manic-zzz 3 months ago
parent 2b14a29df1
commit 47f9c8b004

@ -35,12 +35,21 @@ import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
/**
*
*
*/
public class BackupUtils {
private static final String TAG = "BackupUtils";
// Singleton stuff
// 单例模式相关变量
private static BackupUtils sInstance;
/**
* BackupUtils
*
* @param context
* @return BackupUtils
*/
public static synchronized BackupUtils getInstance(Context context) {
if (sInstance == null) {
sInstance = new BackupUtils(context);
@ -49,43 +58,72 @@ public class BackupUtils {
}
/**
* Following states are signs to represents backup or restore
* status
*
*/
// Currently, the sdcard is not mounted
// 当前SD卡未挂载
public static final int STATE_SD_CARD_UNMOUONTED = 0;
// The backup file not exist
// 备份文件不存在
public static final int STATE_BACKUP_FILE_NOT_EXIST = 1;
// The data is not well formated, may be changed by other programs
// 数据格式不正确,可能被其他程序修改
public static final int STATE_DATA_DESTROIED = 2;
// Some run-time exception which causes restore or backup fails
// 运行时异常导致备份或恢复失败
public static final int STATE_SYSTEM_ERROR = 3;
// Backup or restore success
// 备份或恢复成功
public static final int STATE_SUCCESS = 4;
// 文本导出工具实例
private TextExport mTextExport;
/**
*
*
* @param context
*/
private BackupUtils(Context context) {
mTextExport = new TextExport(context);
}
/**
*
*
* @return truefalse
*/
private static boolean externalStorageAvailable() {
return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
}
/**
*
*
* @return
*/
public int exportToText() {
return mTextExport.exportToText();
}
/**
*
*
* @return
*/
public String getExportedTextFileName() {
return mTextExport.mFileName;
}
/**
*
*
* @return
*/
public String getExportedTextFileDir() {
return mTextExport.mFileDirectory;
}
/**
*
*/
private static class TextExport {
// 笔记查询的投影列
private static final String[] NOTE_PROJECTION = {
NoteColumns.ID,
NoteColumns.MODIFIED_DATE,
@ -93,12 +131,14 @@ public class BackupUtils {
NoteColumns.TYPE
};
// 笔记ID列的索引
private static final int NOTE_COLUMN_ID = 0;
// 笔记修改日期列的索引
private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
// 笔记摘要列的索引
private static final int NOTE_COLUMN_SNIPPET = 2;
// 数据查询的投影列
private static final String[] DATA_PROJECTION = {
DataColumns.CONTENT,
DataColumns.MIME_TYPE,
@ -108,23 +148,36 @@ public class BackupUtils {
DataColumns.DATA4,
};
// 数据内容列的索引
private static final int DATA_COLUMN_CONTENT = 0;
// 数据MIME类型列的索引
private static final int DATA_COLUMN_MIME_TYPE = 1;
// 数据通话日期列的索引
private static final int DATA_COLUMN_CALL_DATE = 2;
// 数据电话号码列的索引
private static final int DATA_COLUMN_PHONE_NUMBER = 4;
// 文本格式数组
private final String [] TEXT_FORMAT;
// 文件夹名称的文本格式索引
private static final int FORMAT_FOLDER_NAME = 0;
// 笔记日期的文本格式索引
private static final int FORMAT_NOTE_DATE = 1;
// 笔记内容的文本格式索引
private static final int FORMAT_NOTE_CONTENT = 2;
// 上下文对象
private Context mContext;
// 导出文件的文件名
private String mFileName;
// 导出文件的目录
private String mFileDirectory;
/**
*
*
* @param context
*/
public TextExport(Context context) {
TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
mContext = context;
@ -132,15 +185,24 @@ public class BackupUtils {
mFileDirectory = "";
}
/**
*
*
* @param id
* @return
*/
private String getFormat(int id) {
return TEXT_FORMAT[id];
}
/**
* Export the folder identified by folder id to text
*
*
* @param folderId ID
* @param ps
*/
private void exportFolderToText(String folderId, PrintStream ps) {
// Query notes belong to this folder
// 查询属于该文件夹的笔记
Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
folderId
@ -149,11 +211,11 @@ public class BackupUtils {
if (notesCursor != null) {
if (notesCursor.moveToFirst()) {
do {
// Print note's last modified date
// 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))));
// Query data belong to this note
// 查询属于该笔记的数据
String noteId = notesCursor.getString(NOTE_COLUMN_ID);
exportNoteToText(noteId, ps);
} while (notesCursor.moveToNext());
@ -163,7 +225,10 @@ public class BackupUtils {
}
/**
* Export note identified by id to a print stream
* ID
*
* @param noteId ID
* @param ps
*/
private void exportNoteToText(String noteId, PrintStream ps) {
Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
@ -176,7 +241,7 @@ public class BackupUtils {
do {
String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
if (DataConstants.CALL_NOTE.equals(mimeType)) {
// Print phone number
// 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);
@ -185,11 +250,11 @@ public class BackupUtils {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
phoneNumber));
}
// Print call date
// 打印通话日期
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
.format(mContext.getString(R.string.format_datetime_mdhm),
callDate)));
// Print call attachment location
// 打印通话附件位置
if (!TextUtils.isEmpty(location)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
location));
@ -205,7 +270,7 @@ public class BackupUtils {
}
dataCursor.close();
}
// print a line separator between note
// 在笔记之间打印换行符
try {
ps.write(new byte[] {
Character.LINE_SEPARATOR, Character.LETTER_NUMBER
@ -216,7 +281,9 @@ public class BackupUtils {
}
/**
* Note will be exported as text which is user readable
*
*
* @return
*/
public int exportToText() {
if (!externalStorageAvailable()) {
@ -229,7 +296,7 @@ public class BackupUtils {
Log.e(TAG, "get print stream error");
return STATE_SYSTEM_ERROR;
}
// First export folder and its notes
// 首先导出文件夹及其笔记
Cursor folderCursor = mContext.getContentResolver().query(
Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION,
@ -240,7 +307,7 @@ public class BackupUtils {
if (folderCursor != null) {
if (folderCursor.moveToFirst()) {
do {
// Print folder's name
// 打印文件夹名称
String folderName = "";
if(folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) {
folderName = mContext.getString(R.string.call_record_folder_name);
@ -257,7 +324,7 @@ public class BackupUtils {
folderCursor.close();
}
// Export notes in root's folder
// 导出根文件夹中的笔记
Cursor noteCursor = mContext.getContentResolver().query(
Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION,
@ -270,7 +337,7 @@ public class BackupUtils {
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
mContext.getString(R.string.format_datetime_mdhm),
noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
// Query data belong to this note
// 查询属于该笔记的数据
String noteId = noteCursor.getString(NOTE_COLUMN_ID);
exportNoteToText(noteId, ps);
} while (noteCursor.moveToNext());
@ -283,7 +350,9 @@ public class BackupUtils {
}
/**
* Get a print stream pointed to the file {@generateExportedTextFile}
*
*
* @return null
*/
private PrintStream getExportToTextPrintStream() {
File file = generateFileMountedOnSDcard(mContext, R.string.file_path,
@ -310,7 +379,12 @@ public class BackupUtils {
}
/**
* Generate the text file to store imported data
*
*
* @param context
* @param filePathResId ID
* @param fileNameFormatResId ID
* @return null
*/
private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
StringBuilder sb = new StringBuilder();
@ -339,6 +413,4 @@ public class BackupUtils {
return null;
}
}
}
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