Android 2.2: Reboot device programmatically

Question

I would like to know if there is a way to reboot the device through code. Ive tried:

Intent i = new Intent(Intent.ACTION_REBOOT); 
i.putExtra("nowait", 1); 
i.putExtra("interval", 1); 
i.putExtra("window", 0); 
sendBroadcast(i);

And added permissions for REBOOT but it still doesnt work.

Thanks

I think I need to sign my app with the "platform certificate". Can anyone tell me how to do this? Im not planning on releasing this app on the market, I just need it for my android tablet. Thanks — Johan, Jan 02 '11 at 20:46
If it's an HTC Desire, you can turn on the GPS and do some 3D rendering with OpenGL. The combination will cause the phone to quickly overheat which in turn causes a reboot. — Graham Borland, Nov 12 '11 at 00:03
Through experience, an Android 2.2 (or 2.3) device will spontaneously reboot if there are enough pending intents queued up that you aren't servicing (for instance, if your thread to process intents is blocked on something else). Not that this in any way is really an *acceptable* way to reboot the device. — Michael, Apr 28 '14 at 21:21
Is there any way to programmatically reboot the device without rooting it? — Bogdan Doicin, Sep 16 '14 at 08:52

score 35 · Answer 1 · answered Nov 11 '11 at 23:50

35

This seemed to work for me:

try {
        Process proc = Runtime.getRuntime().exec(new String[] { "su", "-c", "reboot" });
        proc.waitFor();
    } catch (Exception ex) {
        Log.i(TAG, "Could not reboot", ex);
    }

answered Nov 11 '11 at 23:50

saulpower

1,258
1
10
13

I am getting this `Could not rebootjava.io.IOException: Cannot run program "su": error=13, Permission denied` – Mohamad Ghaith Alzin Dec 08 '22 at 04:19

score 0 · Answer 2 · answered Sep 18 '14 at 17:16

Still for rooted devices, but in case you want safer (process.waitFor() is conditioned, in separate try-catch, we have proper exception handling, "now" added in command after reboot, which is necessary for some devices, etc.) and maybe cleaner code, take a look at this:

Process rebootProcess = null;
try
{
    rebootProcess = Runtime.getRuntime().exec("su -c reboot now");
}
catch (IOException e)
{
    // Handle I/O exception.
}

// We waitFor only if we've got the process.
if (rebootProcess != null)
{
    try
    {
        rebootProcess.waitFor();
    }
    catch (InterruptedException e)
    {
        // Now handle this exception.
    }
}

score 0 · Answer 3 · answered Mar 07 '15 at 16:39

0

You could possibly use the PowerManager to make it reboot (this does not guarantee that it'll reboot - OS may cancel it): links
link #2

answered Mar 07 '15 at 16:39

Muhammad Waleed

2,517
4
27
75

3

Please add the useful code along with the links in case the links break over time. – Blundering Philosopher Mar 07 '15 at 16:57

score 0 · Answer 4 · edited Sep 27 '17 at 15:17

0

I am using Xamarin. For me the solution is:

Java.Lang.Runtime.GetRuntime().Exec(new String[] { "/system/xbin/su", "-c", "reboot now" });

edited Sep 27 '17 at 15:17

Martin Evans

45,791
17
81
97

answered Sep 27 '17 at 14:57

Renan Eberle Costella

117
9

score -1 · Answer 5 · edited Oct 27 '12 at 11:17

-1

Here is a solution. Remember, the device must be rooted.

try{
    Process p = Runtime.getRuntime().exec("su");
    OutputStream os = p.getOutputStream();                                       
    os.write("reboot\n\r".getBytes());
    os.flush();
}catch(IOException )

edited Oct 27 '12 at 11:17

Bo Persson

90,663
31
146
203

answered Oct 26 '12 at 22:59

antraxa

87
3

score -4 · Answer 6 · answered Jan 23 '11 at 07:43

-4

If the phone is rooted, it's actually very simple:

try {
    Runtime.getRuntime().exec("su");
    Runtime.getRuntime().exec("reboot");
} catch (IOException e) {
}

The first command will ask for superuser permission. The second, will reboot the phone. There is no need for extra permissions in the manifest file since the actual rebooting is handled by the executed comamand, not the app.

answered Jan 23 '11 at 07:43

Aleadam

40,203
9
86
108

I tried this, it asked for super user permission, a toast message has been shown saying `application has been granted super user permission`, then no exception caught, but phone not rebooted. – Mithun Sreedharan Oct 04 '11 at 06:12
3

This won't work because second command will run in a different process than the `su` process. – Caner Aug 16 '12 at 13:00
9

answer is not useful because, "Runtime.getRuntime().exec("your command");" is always run in different session. so "reboot" command after "su" will not run under "su" permission. So you have to use this "Runtime.getRuntime().exec(new String[]{"/system/bin/su","-c","reboot now"}); ", this is works for me. – VISHAL VIRADIA Nov 11 '12 at 08:30
1

Like Vishal says, each exec() call is run in it's own independent shell. Just 'su' will wait for input, so if you had called waitFor(), like in the correct answer, your app would just stall (I think) – devin Mar 11 '13 at 16:00

Android 2.2: Reboot device programmatically

6 Answers6

Linked