Android adb 备份存储问题

Question

我的 Android 手机上的 adb bakup 有问题 - 它是 Lenovo Vibe Shot Z90a40，Android 版本 5.1。我正在尝试备份 Viber，但其他软件包和完整备份也会出现问题。生成的 .ab 文件的大小始终约为 40 字节。

我创建了 .bat 脚本，在其中执行 logcat 以查看设备中发生的情况:

@echo off
echo Connecting.
"%~dp0adb" version
"%~dp0adb" kill-server
"%~dp0adb" wait-for-device

"%~dp0adb" shell am force-stop com.viber.voip

echo Enter Backup My Data on Android phone screen.
"%~dp0adb" backup -f "%~dp0viber.ab" com.viber.voip

ping -n 10 127.0.0.1>nul 
"%~dp0adb" shell logcat -d > "%~dp0log.txt"
"%~dp0adb" kill-server

echo "press any key to exit." 
pause

我在日志错误消息中看到没有足够的可用空间:

I/BackupManagerService( 1136): --- Performing full-dataset adb backup ---

I/BackupManagerService( 1136): Initiating bind of OBB service on com.android.server.backup.BackupManagerService$FullBackupObbConnection@3bc92971

W/ContextImpl( 1136): Calling a method in the system process without a qualified user: android.app.ContextImpl.bindService:1809 com.android.server.backup.BackupManagerService$FullBackupObbConnection.establish:2998 com.android.server.backup.BackupManagerService$PerformAdbBackupTask.run:3620 java.lang.Thread.run:818 <bottom of call stack> 

E/Cryptfs (  304): not running with encryption, aborting

I/BackupManagerService( 1136): OBB service connection com.android.internal.backup.IObbBackupService$Stub$Proxy@22da70c4 connected on com.android.server.backup.BackupManagerService$FullBackupObbConnection@3bc92971

D/BackupManagerService( 1136): Binding to full backup agent : com.viber.voip

W/BackupManagerService( 1136): ensureAvailableSpace 

D/BackupStrogeUtils( 1136):  freeCacheStorage bytes=230686720

D/BackupStrogeUtils( 1136):  freeCacheStorage Start bytes:230686720

D/BackupStrogeUtils( 1136):  listFilesRecursive start uid=1000

D/BackupStrogeUtils( 1136):  listFilesRecursive file = /cache/recovery/last_log_r file.stat.st_uid=0

D/BackupStrogeUtils( 1136):  listFilesRecursive file = /cache/recovery/last_install file.stat.st_uid=0

D/BackupStrogeUtils( 1136):  listFilesRecursive file = /cache/recovery/last_locale file.stat.st_uid=0

D/BackupStrogeUtils( 1136):  freeCacheStorage Found 0 on cache

D/BackupStrogeUtils( 1136):  freeCacheStorage End 

D/BackupStrogeUtils( 1136): Not enough free space; 230686720 requested, 220848128 available

D/BackupManagerService( 1136): backupOnePackage ensureAvailableSpace failed : com.viber.voip

D/BackupManagerService( 1136): Full backup processing complete.

D/bu      (26755): Finished.

但我的设备上有很多可用空间。我执行了 df 命令:

@echo off
"%~dp0adb" kill-server
"%~dp0adb" shell df > df.txt
"%~dp0adb" kill-server
echo Done!
pause

结果如下:

* daemon not running. starting it now on port 5037 *
* daemon started successfully *
Filesystem               Size     Used     Free   Blksize

/dev                     1.4G    76.0K     1.4G   4096

/sys/fs/cgroup           1.4G    12.0K     1.4G   4096

/mnt/asec                1.4G     0.0K     1.4G   4096

/mnt/obb                 1.4G     0.0K     1.4G   4096

/system                  1.9G     1.7G   255.5M   4096

/data                   25.4G    12.3G    13.1G   4096

/preload               387.4M   127.5M   259.9M   4096

/cache                 248.0M   220.0K   247.7M   4096

/persist                27.5M   184.0K    27.3M   4096

/firmware               64.0M    51.1M    12.9M   16384

/mnt/shell/emulated     25.3G    12.3G    13.1G   4096

/storage/emulated/legacy    25.3G    12.3G    13.1G   4096

/storage/sdcard0        25.3G    12.3G    13.1G   4096

我在 /data 分区上有将近 13GB 的空闲空间。奇怪的是备份还原功能有效，我成功地将viber包从我的旧手机转移到这个手机上。

我找到了类似的 thread并用adb的1.0.31和1.0.32两个版本进行了测试，但结果是一样的。有谁知道哪里出了问题？感谢您的帮助。

提前致谢

Answer 1

在引用 this SO thread 中描述的 ADB 参数后，备份开始为我工作.

例如:

adb backup "-apk -shared -all -f backup.ab"

我确实使用了 1.0.31，但这可能不是问题所在。