Context.getCacheDir()
Context.getCodeCacheDir()
Context.getNoBackupFilesDir()
Context.getExternalFilesDir()
res/xml
<application android:fullBackupContent="@xml/mybackupscheme">
<include/>
<exclude/>
android:backupAgent
android:fullBackupOnly="true"
<application/>
onBackup/onRestore
onCreate(), onFullBackup()
onRestoreFinished()
super.onFullBackup()
bmgr run
bmgr fullbackup <packagename>
bmgr restore <packagename>
fullbackup
