Save Database on SD Card Backup DB on SD
suggest changepublic static Boolean ExportDB(String DATABASE_NAME , String packageName , String folderName){
//DATABASE_NAME including ".db" at the end like "mayApp.db"
String DBName = DATABASE_NAME.substring(0, DATABASE_NAME.length() - 3);
File data = Environment.getDataDirectory();
FileChannel source=null;
FileChannel destination=null;
String currentDBPath = "/data/"+ packageName +"/databases/"+DATABASE_NAME; // getting app db path
File sd = Environment.getExternalStorageDirectory(); // getting phone SD card path
String backupPath = sd.getAbsolutePath() + folderName; // if you want to set backup in specific folder name
/* be careful , foldername must initial like this : "/myFolder" . dont forget "/" at begin of folder name
you could define foldername like this : "/myOutterFolder/MyInnerFolder" and so on ...
*/
File dir = new File(backupPath);
if(!dir.exists()) // if there was no folder at this path , it create it .
{
dir.mkdirs();
}
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
Date date = new Date();
/* use date including file name for arrange them and preventing to make file with the same*/
File currentDB = new File(data, currentDBPath);
File backupDB = new File(backupPath, DBName +"("+ dateFormat.format(date)+").db");
try {
if (currentDB.exists() && !backupDB.exists()) {
source = new FileInputStream(currentDB).getChannel();
destination = new FileOutputStream(backupDB).getChannel();
destination.transferFrom(source, 0, source.size());
source.close();
destination.close();
return true;
}
return false;
} catch(IOException e) {
e.printStackTrace();
return false;
}
}
call this method this way :
ExportDB(“myDB.db”,“com.example.exam”,“/myFolder”);
Found a mistake? Have a question or improvement idea?
Let me know.
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