Automatic Google Drive backup for Android’s React Native

What if async storage values were to persist when a user changed devices or installed an app again?

You won’t believe it, but it works with Android right out of the box!

First we need to enable a backup option in the android/app/src/main/AndroidManifest.xml file:

    <application
      android:allowBackup="true"
      android:dataExtractionRules="@xml/backup_rules"

docs: android:allowBackup=["true" | "false"]

Then create android/app/src/main/res/xml/backup_rules.xml file with the list of files that should be added to backup:

<?xml version="1.0" encoding="utf-8"?>
<data-extraction-rules>
  <cloud-backup>
    <!-- your rules -->
  </cloud-backup>
  <device-transfer>
    <!-- your rules -->
  </device-transfer>
</data-extraction-rules>

docs: Backup and restore

Testing

More rules are listed below, but first, let’s look at how to test them.

1. You can use Simulator or Real device
2. Need to enable Backups: Setting => System => Backup
3. Then using adb you can create/restore backup:

# Replace `com.mycompany.myapp` with your app package!!!
adb shell bmgr…