How to Change Images on Imageview After Some Interval

how to change images on imageView after some interval

You can't use things in the UI thread from a background one. So this call:

iv.setImageResource(mThumbIds[i]);

Has to be done in the main thread. In fact you probably don't need a background thread at all to get the effect you're looking for. You can make that just an activity, no need to implement runnable. and then do something like this:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    iv = (ImageView) findViewById(R.id.yourImageViewID);
    int i = 0;
    Runnable r = Runnable(){
        public void run(){
             iv.setImageResource(mThumbIds[i]);
             i++;
             if(i >= mThumbIds.length){
                 i = 0;
             }
             iv.postDelayed(r, 3000); //set to go off again in 3 seconds.
         }
    };
    iv.postDelayed(r,3000); // set first time for 3 seconds

Android: changing Image with time interval

I do not know about ImageLoader component but scheduling a timer on a view is quite easy in Android.(Without any additional Object)

final ImageView bgImage=(ImageView) findViewById(R.id.image);

...

new Runnable() {
    int updateInterval = 1000; //=one second

    @Override
    public void run() {

        // Any code which goes here will be executed every 'updateInterval'
        // change your background here            

        bgImage.postDelayed(this, updateInterval);
    }
}.run();

You can change this template as you wish, suppose I want to stop this timer, for this purpose I have to add a stop method to my runnable(This stop method acts synchronized and do not cause inconsistency in timer inner codes):

Runnable myRunnable = new Runnable() {
    int updateInterval = 1000; //=one second
    boolean stop = false;

    public void stop() {
        this.stop = true;
    }    

    @Override
    public void run() {

        // Any code which goes here will be executed every 'updateInterval'
        // change your background here            

        if(!stop) {
            bgImage.postDelayed(this, updateInterval);
        }
    }
}.run();

Now I can stop it by myRunnable.stop();

EDIT :
You should iterate your array of URLs and pass one of them to your downloader. It can be accomplished by this snippet code:

int arraySize = list.size();

new Runnable() {
    int currentIndex = 0;
    int updateInterval = 1000; //=one second

    @Override
    public void run() {

        currentIndex += 1;
        if(currentIndex == arraySize){
            currentIndex = 0;
        }

        item = list.get(currentIndex);       
        downloader.download(item.imageurl(), bgImage);            

        bgImage.postDelayed(this, updateInterval);
    }
}.run();

Android: how to change images in a imageview, with varying intervals?

Use below code hope it will help

MyCount count=new MyCount(IMAGE_IDS.length * 1000,1000);  
 public class MyCount extends CountDownTimer{

            public MyCount(long millisInFuture, long countDownInterval) {
               super(millisInFuture, countDownInterval);
               }

               @Override
               public void onFinish() {
                      start=0;
                  count.start();
                  }

               @Override
               public void onTick(long millisUntilFinished) {
                      if(start<=IMAGE_IDS.length)
{
                   img.setImageResource(IMAGE_IDS[start])
                   start+=1;
}

                 }
        }
int start=0;
count.start();

Image View change image after paticular time interval

You will need TimerTask for it.

Below Snippet will help you

It will change image every 3 seconds.

  timer = new Timer();
            timer.schedule(new TimerTask() {

                @Override
                public void run() {
                    runOnUiThread(new Runnable() {

                        public void run() {

                            if (flag > 1) {
                                timer.cancel();
                                timer = null;
                            } else
                                imageView.setImageResource(images[flag++]);

                        }
                    });

                }
            }, System.currentTimeMillis(), 3000);

Get from Arraylist and Update Imageview Periodically after some Interval

I hope the following function will help. It will trigger after every 4 seconds and a toast message will be showing. You can call your function to load your images based on I counter.

int i = 0;
int length = 5;
private Handler mHandler;
private Runnable mRunnable;  

public void startPeriodicFunciton() {

    mHandler = new Handler();
    mRunnable = new Runnable() {
        @Override
        public void run() {
            // Do some task on delay
            //   doTask();

            // You can add your fuction to load image here
            i++;
            if (i == length)
                i = 0;
            Toast.makeText(MainActivity.this, "value : " + i, 
Toast.LENGTH_SHORT).show();
            mHandler.postDelayed(mRunnable, 4000);

        }
    };
    mHandler.postDelayed(mRunnable, (4000));
}

How to change image after one second automatically in Android Studio?

You can use a Handler with a delay of 1 sec for the first change, and a handler for 2 seconds for the rollback

public class MainActivity extends AppCompatActivity {
    ImageView imageView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView.findViewById(R.id.img1);}

        public void start(View view){
            
            new Handler(getMainLooper()).postDelayed(() -> {
                imageView.setImageResource(R.drawable.img2);
            }, 1000); // 1 second
            
            new Handler(getMainLooper()).postDelayed(() -> {
                imageView.setImageResource(R.drawable.img1);
            }, 2000); // 2 seconds
            
        }
    }
}

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