I want to schedule an action to change automatically my ViewPager pages.
I've tried:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
swipeTimer = new Timer();
swipeTimer.schedule(new TimerTask() {
@Override
public void run() {
if (currentPage == NUM_PAGES) {
currentPage = 0;
}
featureViewPager.setCurrentItem(currentPage++, true);
}
}, 100, 500);
but I'm always getting:
E/AndroidRuntime(5381): FATAL EXCEPTION: Timer-0
E/AndroidRuntime(5381): java.lang.IllegalStateException: Must be called from main thread of process
I'm already in main thread right? How can I solve this?
Thanks for your time.
EDIT:
====================================
Thanks for all your answers. Based on these responses I came across 2 solutions:
Solution 1:
swipeTimer = new Timer();
swipeTimer.schedule(new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
if (currentPage == NUM_PAGES) {
currentPage = 0;
}
featureViewPager.setCurrentItem(currentPage++, true);
}
});
}
}, 500, 3000);
Solution 2:
final Handler handler = new Handler();
final Runnable Update = new Runnable() {
public void run() {
if (currentPage == NUM_PAGES) {
currentPage = 0;
}
featureViewPager.setCurrentItem(currentPage++, true);
}
};
swipeTimer = new Timer();
swipeTimer.schedule(new TimerTask() {
@Override
public void run() {
handler.post(Update);
}
}, 500, 3000);
Which one is better or they are the same?
Thanks once again.
If you want to use thread in the main UI then you need to use a hander to hand it.
Handler handler = new Handler();
Runnable update = new Runnable() {
public void run() {
if ( currentPage == NUM_PAGES ) {
currentPage = 0;
}
featureViewPager.setCurrentItem(currentPage++, true);
}
};
new Timer().schedule(new TimerTask() {
@Override
public void run() {
handler.post(update);
}
}, 100, 500);