android runtime command problem

Question

i'm trying to reboot my android device (doing android porting) for test.

my code :

try {
            Runtime rt = Runtime.getRuntime();
            Process proc = rt.exec("reboot");

            InputStream is = proc.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line;

            while ((line = br.readLine()) != null) {
                Log.i("runtime","line : " + line);
            }
        } catch (Throwable t) {
            t.printStackTrace();
        }

but the device didn't reboot itself.

if i change the command to

Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("ls");

it ran fine , show all dir.

and when i input "reboot" in adb shell , it also worked. why???

reboot is just one of toolbox commands, I also run other command which can work from shell. But, none of them can work from rt.exec except 'ls'. Could some one tell me how to make it works from android runtime ? Thanks

in shell maybe it works because you have a root shell. If you do it in a non-root shell : $ reboot reboot: Operation not permitted — Marco Grassi, Jun 09 '11 at 09:12

score 1 · Accepted Answer · edited May 23 '17 at 12:12

1

you can't do this on non-rooted phones:

How to boot android phone programmatically?

edited May 23 '17 at 12:12

Community

1
1

answered Jun 09 '11 at 09:13

Selvin

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3
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43

score 1 · Answer 2 · edited May 23 '17 at 11:55

1

Refer Runtime.exec() : Reboot in Android ?

edited May 23 '17 at 11:55

Community

1
1

answered Jun 09 '11 at 09:20

Labeeb Panampullan

34,521
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android runtime command problem

2 Answers2