onRestore not invoked for my custom BackupAgent

There are some data in my Android app that I would like to backup and restore. For that purpose I have created a custom implementation of BackupAgent.

In my manifest in have included the backup agent as you can see below

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    android:installLocation="auto"

    package="com.myapp"

    android:versionCode="14"

    android:versionName="1.13" >



    <application

        android:backupAgent="com.myapp.MyBackupAgent">



        <meta-data

            android:name="com.google.android.backup.api_key"

            android:value="my key" />

I have included the backup service api key, although I am testing with the emulator (Android 2.2) and it should not be necessary, because it uses the local backup transport.

In order to do the test of the backup and restore I have done the following:

• Start the emulator with my application installed.
  
  



• 
  
  

  
  
  Enable backup
  
  

  
  
  

  
  
  adb shell bmgr enable true
  
  

  
  
  



• 
  
  

  
  
  Call the part of my code were the dataChanged method in the BackupManager class is called.
  
  

  
  
  



• 
  
  

  
  
  Initiate manually the backup operation
  
  

  
  
  

  
  
  adb shell bmgr run
  
  

  
  
  



• 
  
  

  
  
  Checked in the log that the onBackup method of my custom BackupAgent was called.
  
  

  
  
  



• Uninstall the app
  
  



• Reinstall the app
  
  



• Check in the log if the onRestore method is called.
  
  

The thing is that the onRestore method does not seem to be called and I don't know why. After reinstalling the app or manually triggering the restore with adb I see the following in the console.

$adb shell bmgr restore com.myapp

restoreStarting: 2 packages

restoreFinished: 0

done

and this other in the log

D/AndroidRuntime( 8259):

D/AndroidRuntime( 8259): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<

D/AndroidRuntime( 8259): CheckJNI is ON

D/AndroidRuntime( 8259): --- registering native functions ---

D/BackupManagerService(   59): MSG_RUN_RESTORE observer=android.app.backup.IRestoreObserver$Stub$Proxy@450e16a8

V/LocalTransport(   59): start restore 1

V/LocalTransport(   59):   nextRestorePackage() = @pm@

V/LocalTransport(   59):   getRestoreData() found 7 key files

V/LocalTransport(   59):     ... key=com.android.providers.settings size=1208

V/LocalTransport(   59):     ... key=com.myapp size=501

V/LocalTransport(   59):     ... key=android size=1208

V/LocalTransport(   59):     ... key=com.android.providers.userdictionary size=1208

V/LocalTransport(   59):     ... key=com.android.browser size=1208

V/LocalTransport(   59):     ... key=com.android.inputmethod.latin size=1208

V/LocalTransport(   59):     ... key=@meta@ size=11

V/LocalTransport(   59):   no more packages to restore

V/LocalTransport(   59): finishRestore()

V/LocalTransport(   59): finishRestore()

D/AndroidRuntime( 8259): Shutting down VM

but I don't see that the call to onRestore is actually made (I have some logging statements just at the beginning of it?

Has this ever happen to you? Is there any reason by the onRestore method is not called, even in the onBackup was called?

Thanks for your help!