安装android到u盘安装程序,启动活动时将USB U盘安装到android的东西

我正在尝试将USB海量存储设备安装到我的Raspberry Pi运行Android的东西。我遇到了this答案，它显示了如何使用命令行ADB shell进行挂载。 但问题是我必须在每次启动设备时运行这些命令。我想在我的启动活动的onCreate()中安装USB驱动器。下面是代码：启动活动时将USB U盘安装到android的东西

//Here is the mount drive function which I called in onCreate of my activity.

private void mountDrive() throws IOException, InterruptedException {

Process mProcess = Runtime.getRuntime().exec("/system/xbin/su");

BufferedReader reader = new BufferedReader(new InputStreamReader(mProcess.getInputStream()));

DataOutputStream dos = new DataOutputStream(mProcess.getOutputStream());

dos.writeBytes("mkdir /mnt/usbn");

dos.flush();

dos.writeBytes("mount -t vfat -o rw /dev/block/sda1 /mnt/usbn");

dos.flush();

dos.writeBytes("exitn");

//Read the response

String line, result = "";

while ((line = reader.readLine()) != null) {

result += line;

Log.d("CMD","RESULT:"+result);

}

reader.close();

dos.flush();

dos.close();

mProcess.waitFor();

}

但我收到此错误：

I/sh: type=1400 audit(0.0:31): avc: denied { read } for name="/" dev="mmcblk0p6" ino=2 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:rootfs:s0 tclass=dir permissive=1

I/sh: type=1400 audit(0.0:32): avc: denied { open } for path="/" dev="mmcblk0p6" ino=2 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:rootfs:s0 tclass=dir permissive=1

W/System.err: java.io.IOException: Cannot run program "su": error=13, Permission denied

W/System.err: at java.lang.ProcessBuilder.start(ProcessBuilder.java:983)

W/System.err: at java.lang.Runtime.exec(Runtime.java:691)

W/System.err: at java.lang.Runtime.exec(Runtime.java:524)

W/System.err: at java.lang.Runtime.exec(Runtime.java:421)

我如何挂上从我的Android上的物联网应用在使用USB设备？

+1

在Android下，它会自动挂载。所以我想知道为什么这不会发生在Android的东西。 –