android - 根资源管理器 Android 11 (API 30)

Question

当我以 api 30 为目标并尝试检索路径“/data/data”(具有 root 权限)中的文件列表时，我只获得了我的应用程序的文件夹，而使用 api 29 或更低版本，我获得了所有文件。
即使使用 api 30，我如何检索所有文件？
使用的代码:

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import com.topjohnwu.superuser.Shell

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val result = Shell.su("ls -la /data/data").exec()
        Log.e("files", result.out.toString())
    }
}

我使用这个库作为根: https://github.com/topjohnwu/libsu

Answer 1

以下是 Android 11 中添加的新限制:
https://developer.android.com/about/versions/11/privacy/storage

Document access restrictions

To give developers time for testing, the following changes related > to the Storage Access Framework (SAF) take effectonly if your app targets Android 11 or higher.

Access to directories

You can no longer use theACTION_OPEN_DOCUMENT_TREEintent action to request access to the following directories:

• The root directory of the internal storage volume.
• The root directory of each SD card volume that the device manufacturer considers to be reliable, regardless of whether the cardis emulated or removable. A reliable volume is one that an app cansuccessfully access most of the time.
• The Download directory.

Access to files

You can no longer use theACTION_OPEN_DOCUMENT_TREEor theACTION_OPEN_DOCUMENTintent action to request that the user select individual files fromthe following directories:

• The Android/data/ directory and all subdirectories.
• The Android/obb/ directory and all subdirectories.