安卓：删除文件（S）和消息（S）恢复 [英] Android: deleted file(s) and message(s) recovery

问题描述

我正打算设计对我来说，恢复被删除的文件（S）和/或消息（S）的应用程序。不过，我有很多问题在进行开发阶段之前要问。

1. 什么是由Android外部存储器使用的文件系统？


2. 是否有可能对我来说，无论是在内部或外部存储器恢复被删除的文件（S）？


3. 是否有可能对我来说，恢复已删除的邮件？

对于q＃2和Q＃3
4. 后续问题，可以这样不生根做/越狱手机？


5. 我应考虑什么方法，如果我在开发继续吗？

这可能是很多，但是否这是可行的，这将有助于如果你能现场有一定的参考（S）（我宁愿去一个积极的可行性结果）？

感谢。

解决方案

  

什么是由Android外部存储器使用的文件系统？

在Android 1.x的/ 2.x中，FAT32（又名，VFAT）。在Android 3.0+，我认为它因人而异，但它可能是大多数设备EXT4。

  

是否有可能对我来说，无论是在内部或外部存储器恢复被删除的文件（S）？

有可能。这将是比Linux机器上恢复从VFAT或EXT4分区删除的文件没有显著不同。请注意，Android 1.x中/ 2.x的内部存储是YAFFS2，不是VFAT或EXT4。

  

是否有可能对我来说，恢复已删除的邮件？

有英文单词消息的许多可能的定义。最相关的（短信息，电子邮件，即时消息）是由应用程序管理的。有可能是处理信息应用程序数以万计，他们将在数千种不同的方式这样做。几乎没有人对你访问的，因为很少会是开源的。

  

对于q＃2和Q＃3后续问题，可以这样不生根/越狱手机做什么？

没有，可移动介质（在Android 1.x的/ 2.x的实现为micro SD卡例如，外部存储）除外。你有没有生根没有访问内部存储和你没有外部存储低级别的访问，而生根。 越狱不是一般相对于Android设备使用的术语。

I was planning to design an application for me to recover deleted file(s) and/or message(s). However, I have a lot of question to ask before proceeding to the development stage.

1. What is the filesystem used by Android external memory?
2. Is it possible for me to recover deleted file(s) in either internal or external memory?
3. Is it possible for me to recover deleted messages?
4. Follow-up question for Q#2 and Q#3, can this be done without rooting/jailbreaking the phone?
5. What approach shall I consider if I am to proceed in the development?

This might be a lot but it would help if you could site some reference(s) whether or not this is feasible (which I would rather go for a positive feasibility result)?

Thanks.

解决方案

What is the filesystem used by Android external memory?

On Android 1.x/2.x, FAT32 (a.k.a., vfat). On Android 3.0+, I think that it varies, though it probably is ext4 on most devices.

Is it possible for me to recover deleted file(s) in either internal or external memory?

Possibly. It would be not significantly different than recovering deleted files from vfat or ext4 partitions on a Linux machine. Note that Android 1.x/2.x internal storage is YAFFS2, not vfat or ext4.

Is it possible for me to recover deleted messages?

There are many possible definitions of the English word "message". Most of relevance (SMS messages, email messages, instant messages) are managed by apps. There are probably tens of thousands of apps that handle "messages", and they will do so in thousands of different ways. Almost none of them are accessible to you, since very few will be open source.

Follow-up question for Q#2 and Q#3, can this be done without rooting/jailbreaking the phone?

No, with the exception of removable media (e.g., external storage implemented on Android 1.x/2.x as a micro SD card). You have no access to internal storage without rooting, and you do not have low-level access to external storage without rooting. "Jailbreaking" is not a term generally used with respect to Android devices.

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