BackupAgentHelper：不会调用onRestore [英] BackupAgentHelper: onRestore not getting called

问题描述

我从此链接安装了示例BackupRestore。

I installed the example BackupRestore from this link.

https://android.googlesource.com/platform/development/+/0b3758ea4e53f9bfd0b112eaa4a7dd7b7f4040f5/samples/BackupRestoreF2%2 ％2F％2F％2F％2F％2F％2F％2F％2F％2F

我无法还原数据。

OnBackup和OnCreate被调用，但是OnRestore没有。

OnBackup and OnCreate get called, but OnRestore does not.

我能够备份：OnCreate和OnBackup被命中，但是OnRestore

I am able to backup: OnCreate and OnBackup get hit, but OnRestore does not.

@Override
public void onRestore(BackupDataInput data, int appVersionCode,
                      ParcelFileDescriptor newState) throws IOException {
    // Hold the lock while the FileBackupHelper restores the file from
    // the data provided here.
    synchronized (BackupRestoreActivity.sDataLock) {
        super.onRestore(data, appVersionCode, newState);
    }
}



   public void onRestoreButtonClick(View v) {
        Log.v(TAG, "Requesting restore of our most recent data");
        mBackupManager.requestRestore(
                new RestoreObserver() {
                    public void restoreFinished(int error) {
                        /** Done with the restore!  Now draw the new state of our data */
                        Log.v(TAG, "Restore finished, error = " + error);
                        populateUI();
                    }
                }
        );
    }

我尝试使用adb工具（requestRestore除外），但它不起作用

I have tried using the adb tools (besides requestRestore) and it is not working either.

adb shell bmgr restore [package]
adb uninstall [apkfile]
adb  install [apkfile]

运行恢复时，我得到：

restoreStarting: 1 packages
restoreFinished: 0
done

但是OnRestore不会被命中，并且数据也不会恢复。

But OnRestore does not get hit, and the data is not restored.

我正在使用Android Studio 3.0。我为此花了很多时间。有人可以揭露些什么吗？

I am using Android Studio 3.0. And I have spent many hours on this. Can anyone shed some light?

推荐答案

检查日志后，我注意到一条消息：

After checking the logs, I noticed a message:

I /备份：[KeyValueRateLimiter] [包]的K / V备份被速率限制器中止。 next = 1519165401410，current = 1519088429345

I/Backup: [KeyValueRateLimiter] K/V backup for [package] aborted by rate limiter. next=1519165401410, current=1519088429345

所以这意味着直到2018年2月20日下午5:23:21才进行备份。使用Google Transport进行备份存在速率限制，因此我将尝试没有速率限制的Local Transport。

So that means the backups are not being made until 2/20/2018, 5:23:21 PM. There is a rate limit for backups with Google Transport, so I am going to try Local Transport which has no rate limit.

更新：切换到Local Transport似乎可行。在我的设备上卸载/重新安装应用后，它能够恢复这些值。

Update: Switching to Local Transport seems to work. It was able to restore the values after an app uninstall/reinstall on my device.

这是我要使其正常工作的方法：

Here is what I did to get it to work:

• 将BackupRestore项目中的源文件复制到新项目中。


• 从此网站生成清单文件的备份密钥： https://developer.android.com/google/backup/signup.html


• 运行 adb shell bmgr列表传输以查看传输。


• 运行 adb shell bmgr传输android / com.android.internal.backup.LocalTransport 更改为本地传输（Google传输将施加速率限制）


• 运行adb shell bmgr backup [package]- -备份应用程序


• 运行 adb shell dumpsys backup 以查看挂起的备份文件



• adb shell bmgr运行

• Copy the source files from the BackupRestore project into a new project.
• Generate the Backup key for the manifest file from this website: https://developer.android.com/google/backup/signup.html
• Run adb shell bmgr list transports to see the transports.
• Run adb shell bmgr transport android/com.android.internal.backup.LocalTransport to change the transport to Local (Google transport will impose a rate limit)
• Run adb shell bmgr backup [package] -- to backup app
• Run adb shell dumpsys backup to see the pending backup files

• adb shell bmgr run

adb卸载[软件包名称]

adb uninstall [package name]

adb install -t [apk文件]（用于调试时，我使用-t）

adb install -t [apk file] (for debugging I used -t)

检查是否已恢复值在安装过程中。

Check that the values were restored during the install.

我为此感到困惑。我希望这对某人有帮助。

I struggled with this. I hope this helps someone.

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