onRestore not invoked for my custom BackupAgent
In my experience, for some odd reason (which I have yet to identify), logging statements made in BackupAgents don't show up in the logs. Nonetheless, I have been able to confirm that the onRestore method is in fact properly run.
In your question you indicate that the onRestore method "does not seem to be called" because you are unable to see the proper logs. Can you instead confirm that the result is failing (i.e. that data that should be properly restored isn't)?
I had this problem and the root cause was that I had a bug in my onBackup preventing it from completing, so onBackup was called but onRestore was not. Fixing the exception in onBackup caused onRestore to be called.
Also Log messages in onBackup and onRestore do show up in the logs. If you set a log filter on the tag "backup" and use something with backup in it for your log tag. You will see logging from the system and yours. Here is what I get
09-08 17:06:56.581 294-352/system_process V/BackupServiceBinder﹕ doBackup() invoked09-08 17:06:56.591 294-352/system_process D/PerformBackupTask﹕ starting agent for backup of BackupRequest{pkg=android}09-08 17:06:56.591 294-352/system_process D/BackupManagerService﹕ awaiting agent for ApplicationInfo{40d5efc0 android}09-08 17:06:56.591 294-308/system_process D/BackupManagerService﹕ agentConnected pkg=android agent=android.app.backup.BackupAgent$BackupServiceBinder@4112a22809-08 17:06:56.601 294-352/system_process V/BackupServiceBinder﹕ doBackup() invoked09-08 17:06:56.601 294-352/system_process D/BackupHelperDispatcher﹕ handling existing helper 'wallpaper' android.app.backup.WallpaperBackupHelper@4114915009-08 17:06:56.621 294-352/system_process D/PerformBackupTask﹕ starting agent for backup of BackupRequest{pkg=com.catglo.sellpr}09-08 17:06:56.661 294-352/system_process D/BackupManagerService﹕ awaiting agent for ApplicationInfo{41074748 com.catglo.sellpr}09-08 17:06:56.781 294-514/system_process D/BackupManagerService﹕ agentConnected pkg=com.catglo.sellpr agent=android.os.BinderProxy@410768c809-08 17:06:56.791 2263-2274/com.catglo.sellpr V/BackupServiceBinder﹕ doBackup() invoked09-08 17:06:56.791 2263-2274/com.catglo.sellpr I/backup﹕ onBackup called09-08 17:06:57.251 294-352/system_process I/PerformBackupTask﹕ Backup pass finished.
in the above log com.catglo.sellpr is from my app and the line that reads com.catglo.sellpr I/backup﹕ onBackup called is the log message in my code. For the onRestore I get
09-08 17:13:34.431 294-352/system_process D/BackupManagerService﹕ MSG_RUN_RESTORE observer=android.app.backup.IRestoreObserver$Stub$Proxy@413132c009-08 17:13:34.511 294-352/system_process V/BackupServiceBinder﹕ doRestore() invoked09-08 17:13:34.561 294-352/system_process D/BackupManagerService﹕ awaiting agent for ApplicationInfo{41074748 com.catglo.sellpr}09-08 17:13:34.561 294-427/system_process D/BackupManagerService﹕ agentConnected pkg=com.catglo.sellpr agent=android.os.BinderProxy@41127ee009-08 17:13:34.571 2263-2276/com.catglo.sellpr V/BackupServiceBinder﹕ doRestore() invoked09-08 17:13:34.571 2263-2276/com.catglo.sellpr I/backup﹕ onRestore called
Earlier I had an exception in onBackup and my log from onRestore was never called but the system messages related to restore were.
The app will not Force Close because of an exception in the backup.