Progressively increase integer / increase int on regular interval

Question

I just recently started playing around with Java/Android.

I am trying to make a very simple Android app. I want a number to be progressively increased. Something like:

int x = 0;

then every 0.1 seconds, x++. Then I can set the text of a textview

.setText(String.valueOf(x));

So in the program it will have an integer number increasing from 0 by 1 every 0.1 seconds.

Meanwhile all other functions/code should run normally while this is happening in the background

you can take a look at this. http://stackoverflow.com/questions/6700802/android-timer-updating-a-textview-ui — Ankii Rawat, Jul 27 '15 at 10:05

score 3 · Accepted Answer · answered Jul 27 '15 at 10:05

3

you could use the TextView's internal handler and its postDelayed method, to increment the int . E.g.

textView.postDelayed(new Runnable() {
       @Override
       public void run() {
            textView.setText(String.valueOf(++x));    
            textView.postDelayed(this, 100);
       }
  }, 100);

where 100 is 100 milliseconds. Don't forget to call

textView.removeCallbacks(null);

when your activity is paused

answered Jul 27 '15 at 10:05

Blackbelt

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what does this mean? http://i.imgur.com/iECgcpM.png , a better question is, what to i replace textView with? – Friedpanseller Jul 27 '15 at 10:10
`postDelayed` returns boolean. remove `(TextView)` from the second line. For postDelayed you don't need the cast, since the method is part of the super class. – Blackbelt Jul 27 '15 at 10:12
NVM I FIXED IT. Thanks. trying it now. /*the .setText is red now, "cannot resolve method setText (java.lang.string)"*/ – Friedpanseller Jul 27 '15 at 10:15
you need couple of brackets more. it should be `((TextView) findViewById(R.id...)).setText(...)` – Blackbelt Jul 27 '15 at 10:16
you have to call `textView.removeCallbacks(null);` – Blackbelt Jul 27 '15 at 10:29
on the top of the run method, add: `if (pressed == 0) return;` and run it again – Blackbelt Jul 27 '15 at 10:36

score 0 · Answer 2 · answered Jul 27 '15 at 10:14

you can use:

int x = 0;

TimerTask scanTask;
Timer t = new Timer();

public void incrementValue(){

scanTask = new TimerTask() {
        public void run() {
               x++;
        }};

    t.schedule(scanTask, 100, 100); 
 }

and use t.cancel(); whenever you want to stop the task.

Progressively increase integer / increase int on regular interval

2 Answers2