這是一種將數據庫導出到名為備份文件夾的文件夾的簡單方法，您可以根據需要對其進行命名，以及從同一文件夾導入數據庫的簡單方法public?class?ExportImportDB?extends?Activity?{

@Override

protected?void?onCreate(Bundle?savedInstanceState)?{

//?TODO?Auto-generated?method?stub

super.onCreate(savedInstanceState);//creating?a?new?folder?for?the?database?to?be?backuped?to

File?direct?=?new?File(Environment.getExternalStorageDirectory()?+?"/Exam?Creator");

if(!direct.exists())

{

if(direct.mkdir())

{

//directory?is?created;

}

}

exportDB();

importDB();

}

//importing?database

private?void?importDB()?{

//?TODO?Auto-generated?method?stub

try?{

File?sd?=?Environment.getExternalStorageDirectory();

File?data??=?Environment.getDataDirectory();

if?(sd.canWrite())?{

String??currentDBPath=?"//data//"?+?"PackageName"

+?"//databases//"?+?"DatabaseName";

String?backupDBPath??=?"/BackupFolder/DatabaseName";

File??backupDB=?new?File(data,?currentDBPath);

File?currentDB??=?new?File(sd,?backupDBPath);

FileChannel?src?=?new?FileInputStream(currentDB).getChannel();

FileChannel?dst?=?new?FileOutputStream(backupDB).getChannel();

dst.transferFrom(src,?0,?src.size());

src.close();

dst.close();

Toast.makeText(getBaseContext(),?backupDB.toString(),

Toast.LENGTH_LONG).show();

}

}?catch?(Exception?e)?{

Toast.makeText(getBaseContext(),?e.toString(),?Toast.LENGTH_LONG)

.show();

}

}

//exporting?database

private?void?exportDB()?{

//?TODO?Auto-generated?method?stub

try?{

File?sd?=?Environment.getExternalStorageDirectory();

File?data?=?Environment.getDataDirectory();

if?(sd.canWrite())?{

String??currentDBPath=?"//data//"?+?"PackageName"

+?"//databases//"?+?"DatabaseName";

String?backupDBPath??=?"/BackupFolder/DatabaseName";

File?currentDB?=?new?File(data,?currentDBPath);

File?backupDB?=?new?File(sd,?backupDBPath);

FileChannel?src?=?new?FileInputStream(currentDB).getChannel();

FileChannel?dst?=?new?FileOutputStream(backupDB).getChannel();

dst.transferFrom(src,?0,?src.size());

src.close();

dst.close();

Toast.makeText(getBaseContext(),?backupDB.toString(),

Toast.LENGTH_LONG).show();

}

}?catch?(Exception?e)?{

Toast.makeText(getBaseContext(),?e.toString(),?Toast.LENGTH_LONG)

.show();

}

}

}

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