在删除Realm文件之前，如何在Android中备份Realm DB.有什么办法可以还原备份文件? [英] How to backup Realm DB in Android before deleting the Realm file. Is there any way to restore the backup file?

问题描述

我正在处理Android应用程序，在将新数据复制到Realm之前，我将删除Realm.我有什么办法可以在删除数据之前备份数据，如果使用realm.copyToRealm()时出现问题，可以将其还原回来吗?

I am working on an Android application where I will be deleting Realm before copying the new data to Realm. Is there any way I can take backup of the data before deleting it and restore it back if something is wrong when using realm.copyToRealm() ?

推荐答案

Realm.writeCopyTo在这种情况下可能会有所帮助.您可以在此处找到文档.

Realm.writeCopyTo might be helpful for this case. You can find doc here.

//Backup
Realm orgRealm = Realm.getInstance(orgConfig);
orgRealm.writeCopyTo(pathToBackup);
orgRealm.close();
//Restore
Realm.deleteRealm(orgConfig);
Realm backupRealm = Realm.getInstance(backupConfig);
backupRealm.writeCopyTo(pathToRestore);
backupRealm.close();
orgRealm = Realm.getInstance(orgConfig);

但是，在您的情况下，将Realm文件移至要备份的位置，然后在要还原时将其移回，将更加简单快捷.要获取Realm文件路径，请尝试:

But in your case, it would be much simpler and faster to just move your Realm file to a place to backup, and move it back when you want to restore it. To get the Realm file path, try:

realm.getPath();

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