Android - change background resource twice with pause between

Issue

I am trying to set a button to green for 1 second, then back to red. But It won't change to green anymore, if I comment out the "change to red" part, it will turn green fine. I have used Log.d and it shows that there is a second difference between changing from "change to green" to "change to red" so you should see the green before the red, but for some reason this is not working.

Any Ideas?

public void level1() throws InterruptedException {
    int Low = 1000;
    int High = 3000;
    int t = r.nextInt(High-Low) + Low;
    Thread.sleep(t);
    handleTime.post(new Runnable() {
        @Override
        public void run() {
            int i = r.nextInt(5);
            switch(i) {
            case 1:
                try {
                    setGreen(tLeft);
                    tLActive = true;
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } finally {
                    tLActive = false;
                    setRed(tLeft);
                }
                break;
            case 2:
                try {
                    setGreen(tRight);
                    tRActive = true;
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } finally {
                    tRActive = false;
                    setRed(tRight);
                }
                break;
            case 3:
                try {
                    setGreen(center);
                    cActive = true;
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } finally {
                    cActive = false;
                    setRed(center);
                }
                break;
            case 4:
                try {
                    setGreen(bLeft);
                    bLActive = true;
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } finally {
                    bLActive = false;
                    setRed(bLeft);
                }
                break;
            case 5:
                try {
                    setGreen(bRight);
                    bRActive = true;
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } finally {
                    bRActive = false;
                    setRed(bRight);
                }
                break;
            }
        }
    });
}

private void setGreen(ImageButton b) {
    b.setBackgroundResource(R.drawable.green);
    Log.d("green", "green");
}

private void setRed(ImageButton b) {
    b.setBackgroundResource(R.drawable.red);
    Log.d("red", "red");
}

Solution

You able to use Handler.class

As simple example:

setGreenColor();
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
  @Override
  public void run() {
   setRedColor();
  }
}, 1000);

where postDelayed will be called in UI thread.

Answered By - dreambit.io dreambitio