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new annotation

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master
2290867136 2 years ago
parent 2acfedc40a
commit 366aa60e73
1 changed files with 61 additions and 59 deletions
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120
app/src/main/java/net/micode/notes/tool/BackupUtils.java
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@ -39,51 +39,50 @@ import java.io.PrintStream;
public class BackupUtils {
private static final String TAG = "BackupUtils";
// 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) {
if (sInstance == null) {
sInstance = new BackupUtils(context);
}
}//实例不存在时生成一个
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
* 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;
// 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;
// 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;
// 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;
// Backup or restore success
// Backup or restore success 保存或备份成功
public static final int STATE_SUCCESS = 4;
private TextExport mTextExport;
private BackupUtils(Context context) {
mTextExport = new TextExport(context);
}
}//为mTextExport分配空间
private static boolean externalStorageAvailable() {
return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
}
}//判断外部存储可用性
public int exportToText() {
return mTextExport.exportToText();
}
}//展示于文本
public String getExportedTextFileName() {
return mTextExport.mFileName;
}
}//get展示于文本的文件名
public String getExportedTextFileDir() {
return mTextExport.mFileDirectory;
}
}//get展示于文本的文件目录
private static class TextExport {
private static final String[] NOTE_PROJECTION = {
@ -91,13 +90,13 @@ public class BackupUtils {
NoteColumns.MODIFIED_DATE,
NoteColumns.SNIPPET,
NoteColumns.TYPE
};
};//定义常量字符串
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 int NOTE_COLUMN_SNIPPET = 2;//定义常量参数
private static final String[] DATA_PROJECTION = {
DataColumns.CONTENT,
@ -106,41 +105,41 @@ public class BackupUtils {
DataColumns.DATA2,
DataColumns.DATA3,
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 static final int FORMAT_FOLDER_NAME = 0;
private static final int FORMAT_NOTE_DATE = 1;
private static final int FORMAT_NOTE_CONTENT = 2;
private final String [] TEXT_FORMAT;//字符串 文本形式
private static final int FORMAT_FOLDER_NAME = 0;//形式 文件名
private static final int FORMAT_NOTE_DATE = 1;//形式 文本数据
private static final int FORMAT_NOTE_CONTENT = 2;//形式 文本内容
private Context mContext;
private String mFileName;
private String mFileDirectory;
private String mFileName;//文件名
private String mFileDirectory;//文件目录
public TextExport(Context context) {
TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
mContext = context;
mFileName = "";
mFileDirectory = "";
}
}//初始化
private String getFormat(int id) {
return TEXT_FORMAT[id];
}
}//get文本的形式
/**
* Export the folder identified by folder id to text
*/
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,
NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
folderId
@ -149,16 +148,16 @@ public class BackupUtils {
if (notesCursor != null) {
if (notesCursor.moveToFirst()) {
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(
mContext.getString(R.string.format_datetime_mdhm),
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);
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 {
String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
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);
long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
String location = dataCursor.getString(DATA_COLUMN_CONTENT);
@ -184,35 +183,36 @@ public class BackupUtils {
if (!TextUtils.isEmpty(phoneNumber)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
phoneNumber));
}
// Print call date
}//phoneNumber文本有效性
// Print call date 给出呼叫数据
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
.format(mContext.getString(R.string.format_datetime_mdhm),
callDate)));
// Print call attachment location
// Print call attachment location 给出呼叫的位置
if (!TextUtils.isEmpty(location)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
location));
}
}//location文本有效性
} else if (DataConstants.NOTE.equals(mimeType)) {
String content = dataCursor.getString(DATA_COLUMN_CONTENT);
if (!TextUtils.isEmpty(content)) {
ps.println(String.format(getFormat(FORMAT_NOTE_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 {
ps.write(new byte[] {
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());
}
}//抛出异常
}
/**
@ -222,14 +222,14 @@ public class BackupUtils {
if (!externalStorageAvailable()) {
Log.d(TAG, "Media was not mounted");
return STATE_SD_CARD_UNMOUONTED;
}
}//外部存储可用性
PrintStream ps = getExportToTextPrintStream();
if (ps == null) {
Log.e(TAG, "get print stream 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(
Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION,
@ -240,7 +240,7 @@ public class BackupUtils {
if (folderCursor != null) {
if (folderCursor.moveToFirst()) {
do {
// Print folder's name
// Print folder's name 给出文件名字
String folderName = "";
if(folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) {
folderName = mContext.getString(R.string.call_record_folder_name);
@ -257,7 +257,7 @@ public class BackupUtils {
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(
Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION,
@ -270,17 +270,17 @@ 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
// Query data belong to this note 查询属于这个便签的数据
String noteId = noteCursor.getString(NOTE_COLUMN_ID);
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;
}
}//展示于文本
/**
* Get a print stream pointed to the file {@generateExportedTextFile}
@ -298,7 +298,8 @@ public class BackupUtils {
try {
FileOutputStream fos = new FileOutputStream(file);
ps = new PrintStream(fos);
} catch (FileNotFoundException e) {
}//输出到指定文件
catch (FileNotFoundException e) {
e.printStackTrace();
return null;
} catch (NullPointerException e) {
@ -307,15 +308,15 @@ public class BackupUtils {
}
return ps;
}
}
}//文本展示
/**
* Generate the text file to store imported data
*/
private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
StringBuilder sb = new StringBuilder();
sb.append(Environment.getExternalStorageDirectory());
sb.append(context.getString(filePathResId));
sb.append(Environment.getExternalStorageDirectory());//外部（SD卡）的存储路径
sb.append(context.getString(filePathResId));//文件的存储路径
File filedir = new File(sb.toString());
sb.append(context.getString(
fileNameFormatResId,
@ -331,7 +332,8 @@ public class BackupUtils {
file.createNewFile();
}
return file;
} catch (SecurityException e) {
}//不存在文件则新建
catch (SecurityException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();

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