Refreshing android systemui without reboot

Question

How do I restart SystemUI in source code without rebooting the device?

I am trying to switch system font without rebooting, everything is OK except for SystemUI. I want to restart SystemUI immediately rather than reboot the device.

Thanks~~~

Answer 1

Requires root access, but you can restart System UI via this method:

private void restartSystemUi() {
    Process process = null;
    try { 
        process = Runtime.getRuntime().exec("su"); 
    } catch (IOException e) {
        Log.e(TAG, "Error retrieving process", e);
    } 

    if (process != null ){
        try {
            DataOutputStream os = new DataOutputStream(process.getOutputStream());  
            os.writeBytes("pkill com.android.systemui\n"); 
            os.flush(); 
            os.writeBytes("exit\n"); 
            os.flush(); 
            process.waitFor();
        } catch (Exception e) {
            Log.e(TAG, "Error killing system UI", e);
        } 
    } 
}

As with any root operations, your mileage may vary. It's not possible without root, so this (or similar privilege abuse) are your only option.

Answer 2

call following method from where you want the rest the UI

private void restartSelf() {   
    AlarmManager am = (AlarmManager)getActivity().getSystemService(Context.ALARM_SERVICE);  
    am.set(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis() + 500, // one second   
    PendingIntent.getActivity(getActivity(), 0, getActivity().getIntent(), PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_CANCEL_CURRENT));  
    Intent i = getActivity().getBaseContext().getPackageManager().getLaunchIntentForPackage(getActivity().getBaseContext().getPackageName());  
    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
    startActivity(i);  
}