Lock android app after a certain amount of idle time

Question

My android application requires a password to be entered in the first activity. I want to be able to automatically send the application back to the password entry screen aft

Answer 1

This has been a really helpful post for me. To back the concept given by @Yoni Samlan . I have implemented it this way

public void pause() {
        // Record timeout time in case timeout service is killed    
        long time = System.currentTimeMillis();     
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
        SharedPreferences.Editor edit = preferences.edit();
        edit.putLong("Timeout_key", time);// start recording the current time as soon as app is asleep
        edit.apply();
    }

    public void resume() {       
        // Check whether the timeout has expired
        long cur_time = System.currentTimeMillis();
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
        long timeout_start = preferences.getLong("Timeout_key", -1);
        // The timeout never started
        if (timeout_start == -1) {
            return;
        }   
        long timeout;
        try {
            //timeout = Long.parseLong(sTimeout);
            timeout=idle_delay;
        } catch (NumberFormatException e) {
            timeout = 60000;
        }
        // We are set to never timeout
        if (timeout == -1) {
            return;
        }
        if (idle){
        long diff = cur_time - timeout_start;
        if (diff >= timeout) {  
            //Toast.makeText(act, "We have timed out", Toast.LENGTH_LONG).show(); 
            showLockDialog();
        }
        }
    } 

Call pause method from onPause and resume method from onResume.