setImageRessource 在计时器 android studio 中不起作用

Question

I'm a beginner... Why did my "setImageRessource" doesn't work? The image "fiole" have to change at 10% and at 20% of the duration of the timer but on my phone, the image never change...

However, the text of the textViex is changed when the time equals the quarter of the duration.

public class XActivity extends AppCompatActivity {
int duree;
String duration;
int durationInt;
protected TextView tempsRestant;
protected ImageView fiole;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_X);
    this.duree = 0;
    this.duration = getIntent().getStringExtra("DURATION");
    this.durationInt = Integer.parseInt(duration)*60;
    this.tempsRestant=findViewById(R.id.tempsRestant);
    this.fiole=findViewById(R.id.fiole);


    final Timer modecTimer = new Timer();
    modecTimer.schedule(new TimerTask() {
        @Override
        public void run() {

            duree += 1;
            if (duree==(durationInt/100)*10){
                fiole.setImageResource(R.drawable.fiole10p);
            }
            if (duree==(durationInt/100)*20){
                fiole.setImageResource(R.drawable.fiole20p);
            }
            if (duree==durationInt/4){
                tempsRestant.setText("some text");
            }

            }


        }
    }, 1000, 1000);

}

Answer 1

Your setImageResource didn't work, because it needs to be run on UIThread

modecTimer.schedule(new TimerTask() {
        @Override
        public void run() {
            runOnUiThread(() -> {
                duree += 1;
                if (duree==(durationInt/100)*10){
                    fiole.setImageResource(R.drawable.fiole10p);
                }
                if (duree==(durationInt/100)*20){
                    fiole.setImageResource(R.drawable.fiole20p);
                }
                if (duree==durationInt/4){
                    tempsRestant.setText("some text");
                }
            });
        }
}, 1000, 1000);