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Control View Pager Slides with Timer Task

I'm trying to slide my ViewPager automatically via using TimerTask class, seems I do not have proper delay and period, it is sliding so fast. I tried all possible combinations of delay and period parameters without any luck, still so annoying fast sliding. Below is the code:
class SliderTimer extends TimerTask {
#Override
public void run() {
HomeActivity.this.runOnUiThread(new Runnable() {
#Override
public void run() {
if (viewPager.getCurrentItem() < listSlides.size() - 1) {
viewPager.setCurrentItem(viewPager.getCurrentItem() + 1);
} else {
viewPager.setCurrentItem(0);
}
}
});
}
}
And the implementations:
Timer timer = new Timer();
timer.scheduleAtFixedRate(new HomeActivity.SliderTimer(), 10000, 10000);
Please guide me, what best can be done for the same.

I think Using Handler is better then TimerTask in this case if ViewPager can slide manually too.
First Create a Handler and Runnable Globally.
private Handler handler=new Handler();
private Runnable runnable=new Runnable() {
#Override
public void run() {
if(pagerSlider.getCurrentItem()==data.size()-1){
pagerSlider.setCurrentItem(0,false);
}else{
pagerSlider.setCurrentItem(pagerSlider.getCurrentItem()+1);
}
}
};
Post the runnable inside onPageChange.
pagerSlider.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){
#Override
public void onPageSelected(int position) {
super.onPageSelected(position);
handler.removeCallbacks(runnable);
handler.postDelayed(runnable,2000);
}
});
You need to post for first time Rest the listener will do. Change the delay as per your need :-
handler.postDelayed(runnable,2000);
I just realize that you might be asking about scrolling velocity . Well for this you need to use Customize Scroller. Go to This thread.

Try this one...
public static final long DELAY_MS = 2000;
public static final long PERIOD_MS = 4000;
new MyTimerHeader(DELAY_MS, PERIOD_MS, viewPager, images_total_length);
public MyTimerHeader(long DELAY_MS, long PERIOD_MS, final ViewPager slider1, final
int image_name) {
final int image_name1=image_name;
final Handler handler = new Handler();
final Runnable Update = new Runnable() {
public void run() {
int currentPage = slider1.getCurrentItem();
if (currentPage == image_name1 - 1) {
currentPage = 0;
}
else {
currentPage = currentPage + 1;
}
slider1.setCurrentItem(currentPage);
}
};
Timer timer = new Timer(); // This will create a new Thread
timer .schedule(new TimerTask() { // task to be scheduled
#Override
public void run() {
handler.post(Update);
}
}, DELAY_MS, PERIOD_MS);
}

Stop repeating timer android

I want to create 10 ImageViews with a delay of 5 seconds between, I created this code:
new Timer().scheduleAtFixedRate(new TimerTask() {
#Override
public void run() {
if (counter <= 10)
newimg();
else
// here I want to stop the timer so it will not try to create any more `ImageViews` (the array contains only 10).
}
}, 0, 5000);
private void newimg() {
ball[counter] = new ImageView(this);
ball[counter].setTag(counter);
ball[counter].setBackgroundResource(R.mipmap.ball);
int randomx = rand.nextInt(layoutwidth);
int randomy = rand.nextInt(layoutheight);
ball[counter].setX(randomx);
ball[counter].setY(randomy);
rlt.addView(ball[counter]);
counter++;
}
How can I stop the timer inside the else statement?

Call Timer cancel to stop the timer.

Call cancel() on timer
My Solutions is :
Handler handler = new Handler();
handler.postDelayed(createImageView, 5000);
Runnable createImageView=new Runnable() {
#Override
public void run() {
if (counter <= 10){
handler.postDelayed(this,5000);
newimg();
}
}
};

Android Handler every X seconds in Service

I have a problem with an handler that has to be executed every X seconds inside a Service. Basically the timing is not precise at all, some times the handler is called every X seconds, then nothing for 30 seconds and then many calls in a single second.
Handler handler = new Handler();
handler.postDelayed(runnable, 0);
private Runnable runnable = new Runnable() {
#Override
public void run() {
new postToCassandra().execute();
handler.postDelayed(this, CassandraPostBatch.TIME_INTERVAL);
}
};

It might be your asynchronous task causing the delay.
Just a note, your scheduling implementation looks a little strange. Maybe you should try something like this, could prove to be more effective.
private static final int TIMER_RATE = 30000;
private static final int TIMER_DELAY = 0;
private Timer timer;
private void startTimer() {
cancelTimer();
scheduleTimer();
}
private void scheduleTimer() {
timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
#Override
public void run() {
new postToCassandra().execute();
}
}, TIMER_DELAY, TIMER_RATE);
}
private void cancelTimer() {
if (timer != null)
timer.cancel();
}
and then just call startTimer(). You could also implement a listener in your PostToCassandra task that will notify the TimerTask when it is done so that it can start with the next post.

Repeat a Method for specific times in android

Here is a code which I want to repeat 50 times after every 3 seconds. if I am calling this function with 'for' loop or 'while' loop it is not working properly Please give me suggestion.
for (int i = 0; i < 50; i++) {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
Generate_Ballon();
}
}, delay);
}

You can use CountDownTimer
See Example,
new CountDownTimer(150000, 3000)
{
public void onTick(long millisUntilFinished)
{
// You can do your for loop work here
}
public void onFinish() {
mTextField.setText("done!");
}
}.start();
Here onTick() method will get executed on every 3 seconds.

You should use Handler's postDelayed function for this purpose. It will run your code with specified delay on the main UI thread, so you will be able to update UI controls.
private int mInterval = 5000; // 5 seconds by default, can be changed later
private Handler mHandler;
#Override
protected void onCreate(Bundle bundle) {
...
mHandler = new Handler();
}
Runnable mStatusChecker = new Runnable() {
#Override
public void run() {
updateStatus(); //this function can change value of mInterval.
mHandler.postDelayed(mStatusChecker, mInterval);
}
};
void startRepeatingTask() {
mStatusChecker.run();
}
void stopRepeatingTask() {
mHandler.removeCallbacks(mStatusChecker);
}

private int count = 50;
private Handler handler = new Handler();
private Runnable r = new Runnable() {
public void run() {
Generate_Ballon();
if (--count > 0) {
handler.postDelayed(r, delay);
}
}
};
handler.postDelayed(r, delay);

Image view image need to change periodically in android

I have an image view. So in the image view i want to change the images after a certain time period. Images are coming from an array list. Now when the no of images are 3 or more than 3, it is working perfect. But when it is 2, my logic is not working. Second image is visible for a moment and then again changed to first image here is my code:
r = new Runnable(){
int i = 0;
public void run(){
iv.setImageBitmap(alBmps.get(i));
i++;
if(i >= alBmps.size()){
i = 0;
}
iv.postDelayed(r, 5000); //set to go off again in 5 seconds.
}
};
iv.postDelayed(r, 1000);
Can any one help me what changes i need on the above code?
Thanks.

Try this
declare variables
static int i=0;
private Timer myTimer;
in your onCreate or on button click where you want to call and start the methods
myTimer = new Timer();
myTimer.schedule(new TimerTask()
{
#Override
public void run()
{
TimerMethod();
}
}, 500, 5000);
add these methods to your class
private void TimerMethod()
{
this.runOnUiThread(Timer_Tick);
}
private Runnable Timer_Tick = new Runnable()
{
public void run()
{
if(i<alBmps.size())
{
iv.setImageBitmap(alBmps.get(i));
}
else
{
i=0;
iv.setImageBitmap(alBmps.get(i));
}
i++;
}
};