how to set image in imageview after a definite interval?

Question

i have an image view & an array that contain image URLs .I have to traverse through array & set image in image view after every 3 sec...say at start image in image view whose url is at index zero of array then after 3 sec image view should display image at index 1 of array and so on.Please help

Answer 1

Use this to update your imageview periodically...

 Timer timer = null;
 int i = 0;

        imgView=(ImageView)findViewById(R.id.img);
            timer = new Timer("TweetCollectorTimer");
                    timer.schedule(updateTask, 6000L, 3000L);//here 6000L is starting //delay and 3000L is periodic delay after starting delay


            private TimerTask updateTask = new TimerTask() {

                    @Override
                    public void run() {

                        YourActivity.this.runOnUiThread(new Runnable() {

                            @Override
                            public void run() { // TODO Auto-generated method stub
                                imgView.setImageResource(photoAry[i]);
                                i++;
                                if (i > 5)
                                {
                                    i = 0;
                                                    }
                            }

                        });
                    }
                };
            int photoAry[] = { R.drawable.photo1, R.drawable.photo2, R.drawable.photo3,
                        R.drawable.photo4, R.drawable.photo5, R.drawable.photo6 };

for stoping this you can call

timer.cancel();

Answer 2

try using a handler and set the image to the imageView in the handler code.

Answer 3

you can use Timer of specific time period that will repeat the function after time interval.

you can use some code like this:

ImageView img = (ImageView)findViewById(R.id.imageView1);
int delay = 0; // delay for 0 milliseconds.
int period = 25000; // repeat every 25 seconds.
Timer timer = new Timer();
timer.scheduleAtFixedRate(new SampleTimerTask(), delay, period);

public class SampleTimerTask extends TimerTask {
    @Override
    public void run() {
        //MAKE YOUR LOGIC TO SET IMAGE TO IMAGEVIEW
        img.setImageResource(R.drawable.ANYRANDOM);
    }
}

Hope it will work for you.

Answer 4

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 = 3000; // 3 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() {
      updateYourImageView(); //do whatever you want to do in this fuction.
      mHandler.postDelayed(mStatusChecker, mInterval);
    }
  };

  void startRepeatingTask() {
    mStatusChecker.run(); 
  }

  void stopRepeatingTask() {
    mHandler.removeCallbacks(mStatusChecker);
  }