pvbgfm6cj
/
Mi_Note
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

new annotation

Browse Source
master
2290867136 2 years ago
parent 2acfedc40a
commit 366aa60e73
1 changed files with 61 additions and 59 deletions
Show Stats Download Patch File Download Diff File

120
app/src/main/java/net/micode/notes/tool/BackupUtils.java
Unescape View File

@ -39,51 +39,50 @@ import java.io.PrintStream;
public class BackupUtils { public class BackupUtils {
private static final String TAG = "BackupUtils"; private static final String TAG = "BackupUtils";
// Singleton stuff // Singleton stuff
private static BackupUtils sInstance; private static BackupUtils sInstance;//在类内定义自身对象，可能会导致无限循环
public static synchronized BackupUtils getInstance(Context context) { public static synchronized BackupUtils getInstance(Context context) {
if (sInstance == null) { if (sInstance == null) {
sInstance = new BackupUtils(context); sInstance = new BackupUtils(context);
} }//实例不存在时生成一个
return sInstance; return sInstance;
} }//只允许一个线程调用它，不允许同时被多个进程使用
/** /**
* Following states are signs to represents backup or restore * Following states are signs to represents backup or restore
* status * status
*/ */
// Currently, the sdcard is not mounted // Currently, the sdcard is not mounted 卡没有装配
public static final int STATE_SD_CARD_UNMOUONTED = 0; public static final int STATE_SD_CARD_UNMOUONTED = 0;
// The backup file not exist // The backup file not exist 没有备份文件
public static final int STATE_BACKUP_FILE_NOT_EXIST = 1; public static final int STATE_BACKUP_FILE_NOT_EXIST = 1;
// The data is not well formated, may be changed by other programs // The data is not well formated, may be changed by other programs 数据丢失，可能被其他程序修改
public static final int STATE_DATA_DESTROIED = 2; public static final int STATE_DATA_DESTROIED = 2;
// Some run-time exception which causes restore or backup fails // Some run-time exception which causes restore or backup fails 超时导致保存或备份失败
public static final int STATE_SYSTEM_ERROR = 3; public static final int STATE_SYSTEM_ERROR = 3;
// Backup or restore success // Backup or restore success 保存或备份成功
public static final int STATE_SUCCESS = 4; public static final int STATE_SUCCESS = 4;
private TextExport mTextExport; private TextExport mTextExport;
private BackupUtils(Context context) { private BackupUtils(Context context) {
mTextExport = new TextExport(context); mTextExport = new TextExport(context);
} }//为mTextExport分配空间
private static boolean externalStorageAvailable() { private static boolean externalStorageAvailable() {
return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()); return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
} }//判断外部存储可用性
public int exportToText() { public int exportToText() {
return mTextExport.exportToText(); return mTextExport.exportToText();
} }//展示于文本
public String getExportedTextFileName() { public String getExportedTextFileName() {
return mTextExport.mFileName; return mTextExport.mFileName;
} }//get展示于文本的文件名
public String getExportedTextFileDir() { public String getExportedTextFileDir() {
return mTextExport.mFileDirectory; return mTextExport.mFileDirectory;
} }//get展示于文本的文件目录
private static class TextExport { private static class TextExport {
private static final String[] NOTE_PROJECTION = { private static final String[] NOTE_PROJECTION = {
@ -91,13 +90,13 @@ public class BackupUtils {
NoteColumns.MODIFIED_DATE, NoteColumns.MODIFIED_DATE,
NoteColumns.SNIPPET, NoteColumns.SNIPPET,
NoteColumns.TYPE NoteColumns.TYPE
}; };//定义常量字符串
private static final int NOTE_COLUMN_ID = 0; private static final int NOTE_COLUMN_ID = 0;
private static final int NOTE_COLUMN_MODIFIED_DATE = 1; private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
private static final int NOTE_COLUMN_SNIPPET = 2; private static final int NOTE_COLUMN_SNIPPET = 2;//定义常量参数
private static final String[] DATA_PROJECTION = { private static final String[] DATA_PROJECTION = {
DataColumns.CONTENT, DataColumns.CONTENT,
@ -106,41 +105,41 @@ public class BackupUtils {
DataColumns.DATA2, DataColumns.DATA2,
DataColumns.DATA3, DataColumns.DATA3,
DataColumns.DATA4, DataColumns.DATA4,
}; };//定义常量字符串
private static final int DATA_COLUMN_CONTENT = 0; private static final int DATA_COLUMN_CONTENT = 0;//专栏 内容
private static final int DATA_COLUMN_MIME_TYPE = 1; private static final int DATA_COLUMN_MIME_TYPE = 1;//专栏 我的 类型
private static final int DATA_COLUMN_CALL_DATE = 2; private static final int DATA_COLUMN_CALL_DATE = 2;//专栏 呼叫 数据
private static final int DATA_COLUMN_PHONE_NUMBER = 4; private static final int DATA_COLUMN_PHONE_NUMBER = 4;//专栏 电话 号码
private final String [] TEXT_FORMAT; private final String [] TEXT_FORMAT;//字符串 文本形式
private static final int FORMAT_FOLDER_NAME = 0; private static final int FORMAT_FOLDER_NAME = 0;//形式 文件名
private static final int FORMAT_NOTE_DATE = 1; private static final int FORMAT_NOTE_DATE = 1;//形式 文本数据
private static final int FORMAT_NOTE_CONTENT = 2; private static final int FORMAT_NOTE_CONTENT = 2;//形式 文本内容
private Context mContext; private Context mContext;
private String mFileName; private String mFileName;//文件名
private String mFileDirectory; private String mFileDirectory;//文件目录
public TextExport(Context context) { public TextExport(Context context) {
TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note); TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
mContext = context; mContext = context;
mFileName = ""; mFileName = "";
mFileDirectory = ""; mFileDirectory = "";
} }//初始化
private String getFormat(int id) { private String getFormat(int id) {
return TEXT_FORMAT[id]; return TEXT_FORMAT[id];
} }//get文本的形式
/** /**
* Export the folder identified by folder id to text * Export the folder identified by folder id to text
*/ */
private void exportFolderToText(String folderId, PrintStream ps) { private void exportFolderToText(String folderId, PrintStream ps) {
// Query notes belong to this folder // Query notes belong to this folder //查询属于这个文件的文本
Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI, Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] { NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
folderId folderId
@ -149,16 +148,16 @@ public class BackupUtils {
if (notesCursor != null) { if (notesCursor != null) {
if (notesCursor.moveToFirst()) { if (notesCursor.moveToFirst()) {
do { do {
// Print note's last modified date // Print note's last modified date 给出上次修改文本的日期
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format( ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
mContext.getString(R.string.format_datetime_mdhm), mContext.getString(R.string.format_datetime_mdhm),
notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE)))); notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
// Query data belong to this note // Query data belong to this note 查询属于这个文本的数据
String noteId = notesCursor.getString(NOTE_COLUMN_ID); String noteId = notesCursor.getString(NOTE_COLUMN_ID);
exportNoteToText(noteId, ps); exportNoteToText(noteId, ps);
} while (notesCursor.moveToNext()); } while (notesCursor.moveToNext());//一直移到下一个直到最后停止循环
} }
notesCursor.close(); notesCursor.close();//释放
} }
} }
@ -176,7 +175,7 @@ public class BackupUtils {
do { do {
String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE); String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
if (DataConstants.CALL_NOTE.equals(mimeType)) { if (DataConstants.CALL_NOTE.equals(mimeType)) {
// Print phone number // Print phone number 给出电话号码
String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER); String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER);
long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE); long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
String location = dataCursor.getString(DATA_COLUMN_CONTENT); String location = dataCursor.getString(DATA_COLUMN_CONTENT);
@ -184,35 +183,36 @@ public class BackupUtils {
if (!TextUtils.isEmpty(phoneNumber)) { if (!TextUtils.isEmpty(phoneNumber)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
phoneNumber)); phoneNumber));
} }//phoneNumber文本有效性
// Print call date // Print call date 给出呼叫数据
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
.format(mContext.getString(R.string.format_datetime_mdhm), .format(mContext.getString(R.string.format_datetime_mdhm),
callDate))); callDate)));
// Print call attachment location // Print call attachment location 给出呼叫的位置
if (!TextUtils.isEmpty(location)) { if (!TextUtils.isEmpty(location)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
location)); location));
} }//location文本有效性
} else if (DataConstants.NOTE.equals(mimeType)) { } else if (DataConstants.NOTE.equals(mimeType)) {
String content = dataCursor.getString(DATA_COLUMN_CONTENT); String content = dataCursor.getString(DATA_COLUMN_CONTENT);
if (!TextUtils.isEmpty(content)) { if (!TextUtils.isEmpty(content)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
content)); content));
} }//content文本有效性
} }
} while (dataCursor.moveToNext()); } while (dataCursor.moveToNext());//下一个直到最后停止循环
} }
dataCursor.close(); dataCursor.close();//释放
} }
// print a line separator between note // print a line separator between note 在便签里给出一个行分隔符
try { try {
ps.write(new byte[] { ps.write(new byte[] {
Character.LINE_SEPARATOR, Character.LETTER_NUMBER Character.LINE_SEPARATOR, Character.LETTER_NUMBER
}); });
} catch (IOException e) { }//检查 撰写行分离与字母号码
catch (IOException e) {
Log.e(TAG, e.toString()); Log.e(TAG, e.toString());
} }//抛出异常
} }
/** /**
@ -222,14 +222,14 @@ public class BackupUtils {
if (!externalStorageAvailable()) { if (!externalStorageAvailable()) {
Log.d(TAG, "Media was not mounted"); Log.d(TAG, "Media was not mounted");
return STATE_SD_CARD_UNMOUONTED; return STATE_SD_CARD_UNMOUONTED;
} }//外部存储可用性
PrintStream ps = getExportToTextPrintStream(); PrintStream ps = getExportToTextPrintStream();
if (ps == null) { if (ps == null) {
Log.e(TAG, "get print stream error"); Log.e(TAG, "get print stream error");
return STATE_SYSTEM_ERROR; return STATE_SYSTEM_ERROR;
} }
// First export folder and its notes // First export folder and its notes //第一个展示的文件和它的便签
Cursor folderCursor = mContext.getContentResolver().query( Cursor folderCursor = mContext.getContentResolver().query(
Notes.CONTENT_NOTE_URI, Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION, NOTE_PROJECTION,
@ -240,7 +240,7 @@ public class BackupUtils {
if (folderCursor != null) { if (folderCursor != null) {
if (folderCursor.moveToFirst()) { if (folderCursor.moveToFirst()) {
do { do {
// Print folder's name // Print folder's name 给出文件名字
String folderName = ""; String folderName = "";
if(folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) { if(folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) {
folderName = mContext.getString(R.string.call_record_folder_name); folderName = mContext.getString(R.string.call_record_folder_name);
@ -257,7 +257,7 @@ public class BackupUtils {
folderCursor.close(); folderCursor.close();
} }
// Export notes in root's folder // Export notes in root's folder 展示在根文件的便签
Cursor noteCursor = mContext.getContentResolver().query( Cursor noteCursor = mContext.getContentResolver().query(
Notes.CONTENT_NOTE_URI, Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION, NOTE_PROJECTION,
@ -270,17 +270,17 @@ public class BackupUtils {
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format( ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
mContext.getString(R.string.format_datetime_mdhm), mContext.getString(R.string.format_datetime_mdhm),
noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE)))); noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
// Query data belong to this note // Query data belong to this note 查询属于这个便签的数据
String noteId = noteCursor.getString(NOTE_COLUMN_ID); String noteId = noteCursor.getString(NOTE_COLUMN_ID);
exportNoteToText(noteId, ps); exportNoteToText(noteId, ps);
} while (noteCursor.moveToNext()); } while (noteCursor.moveToNext());//直到最后一个停止循环
} }
noteCursor.close(); noteCursor.close();//释放
} }
ps.close(); ps.close();//释放
return STATE_SUCCESS; return STATE_SUCCESS;
} }//展示于文本
/** /**
* Get a print stream pointed to the file {@generateExportedTextFile} * Get a print stream pointed to the file {@generateExportedTextFile}
@ -298,7 +298,8 @@ public class BackupUtils {
try { try {
FileOutputStream fos = new FileOutputStream(file); FileOutputStream fos = new FileOutputStream(file);
ps = new PrintStream(fos); ps = new PrintStream(fos);
} catch (FileNotFoundException e) { }//输出到指定文件
catch (FileNotFoundException e) {
e.printStackTrace(); e.printStackTrace();
return null; return null;
} catch (NullPointerException e) { } catch (NullPointerException e) {
@ -307,15 +308,15 @@ public class BackupUtils {
} }
return ps; return ps;
} }
} }//文本展示
/** /**
* Generate the text file to store imported data * Generate the text file to store imported data
*/ */
private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) { private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
StringBuilder sb = new StringBuilder(); StringBuilder sb = new StringBuilder();
sb.append(Environment.getExternalStorageDirectory()); sb.append(Environment.getExternalStorageDirectory());//外部（SD卡）的存储路径
sb.append(context.getString(filePathResId)); sb.append(context.getString(filePathResId));//文件的存储路径
File filedir = new File(sb.toString()); File filedir = new File(sb.toString());
sb.append(context.getString( sb.append(context.getString(
fileNameFormatResId, fileNameFormatResId,
@ -331,7 +332,8 @@ public class BackupUtils {
file.createNewFile(); file.createNewFile();
} }
return file; return file;
} catch (SecurityException e) { }//不存在文件则新建
catch (SecurityException e) {
e.printStackTrace(); e.printStackTrace();
} catch (IOException e) { } catch (IOException e) {
e.printStackTrace(); e.printStackTrace();

Write Preview
Loading…
Cancel
Save