Runtime.Exec():Reboot in Android

Runtime.exec() : Reboot in Android?

reboot works fine in android. you are probably not doing runtime.exec() properly.
you need to handle the

    public static void rebootSU() {
    Runtime runtime = Runtime.getRuntime();
    Process proc = null;
    OutputStreamWriter osw = null;
    StringBuilder sbstdOut = new StringBuilder();
    StringBuilder sbstdErr = new StringBuilder();

    String command="/system/bin/reboot";

    try { // Run Script

        proc = runtime.exec("su");
        osw = new OutputStreamWriter(proc.getOutputStream());
                            osw.write(command);
                osw.flush();
        osw.close();

    } catch (IOException ex) {
        ex.printStackTrace();
    } finally {
        if (osw != null) {
            try {
                osw.close();
            } catch (IOException e) {
                e.printStackTrace();                    
            }
        }
    }
    try {
        if (proc != null)
            proc.waitFor();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    sbstdOut.append(ReadBufferedReader(new InputStreamReader(proc
            .getInputStream())));
    sbstdErr.append(ReadBufferedReader(new InputStreamReader(proc
            .getErrorStream())));
    if (proc.exitValue() != 0) {
                }
        }

Can't reboot device using runtime.exec

Finally after weeks of searching:

Runtime.getRuntime().exec(new String[]{"/system/bin/su","-c","reboot now"});

Android Runtime.getRuntime().exec command causes app to freeze before getting an output

To avoid UI freezes run in thread

new Thread(new Runnable() {
        public void run() {

            try {
                // Send script into runtime process
                Process process = Runtime.getRuntime().exec(pingCommand);

                // ......

            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                // .....
            }
        }
    }).start();
}

Alternative

You can use AsyncTask like this:

private class YourTasksClass extends AsyncTask<Void, Void, String> {

    private String cmd;

    public YourTasksClass(String command) {
        this.cmd = command;
    }

    @Override
    protected String doInBackground(Void... voids) {

        try {
            Process process = Runtime.getRuntime().exec(cmd);

            // ....

            String someResult = "some kind of result";

            return someResult;

        } catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);

        if(result != null) {
            Log.d("tag", "Result: " + result);
        }

    }
}

Later in your code, you can call this by:

new YourTasksClass(pingCommand).execute();

Android superuser shutdown/reboot commands not doing anything

You can't "su" in one process and "reboot" in another expecting it to have super user status. The command "su -c reboot" might work for you though.

Reboot programmatically Android Things

/system/bin/reboot binary in DP 4, so as in all the previous dev previews, has world-executable permission, i.e. the following yields

adb shell ls -l /system/bin | grep reboot
-rwxr-xr-x 1 root shell   ... reboot

That said, it is yet possible to execute the binary for any user (a.k.a app process in Android) without a need to grab su. Just execute in Java for

rebooting

Runtime.getRuntime().exec("reboot");

or for powering off

Runtime.getRuntime().exec("reboot -p");

No permission's needed in AndroidManifest.xml to run the binary successfully.

Caution: in case of security model changes in newer OS versions this approach may not work.

process continues to run after using Java exec

You can call pr.destroy() after your command execution.

Or you can kill the process via the taskkill command:

rt.exec("taskkill /F /IM adb.exe")

Runtime.getRuntime().exec(logcat ) prints only 1 line

I have also granted permission

First, permissions are case-sensitive, and therefore your permission is wrong.

Second, only apps installed on the system partition, or apps signed with the firmware's signing key, can hold READ_LOGS, as of Android 4.1.

Can anyone tell me, how to print whole logcat

Ordinary Android apps cannot do this on modern hardware, for privacy and security reasons, as too many apps log too much crap to LogCat.

Java Runtime.getRuntime(): getting output from executing a command line program

Here is the way to go:

Runtime rt = Runtime.getRuntime();
String[] commands = {"system.exe", "-get t"};
Process proc = rt.exec(commands);

BufferedReader stdInput = new BufferedReader(new 
     InputStreamReader(proc.getInputStream()));

BufferedReader stdError = new BufferedReader(new 
     InputStreamReader(proc.getErrorStream()));

// Read the output from the command
System.out.println("Here is the standard output of the command:\n");
String s = null;
while ((s = stdInput.readLine()) != null) {
    System.out.println(s);
}

// Read any errors from the attempted command
System.out.println("Here is the standard error of the command (if any):\n");
while ((s = stdError.readLine()) != null) {
    System.out.println(s);
}

Read the Javadoc for more details here. ProcessBuilder would be a good choice to use.

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