Change ImageView after few seconds

Question

I\'m trying to implement a simple activity that will let user to insert a password. I\'ve a gridview with the 9 images to use and 4 imageviews that will be the selected images (

Answer 1

Approach 1)

Let the thread sleep in doInBackground, but change the resource in

@Override
protected void onPostExecute(Void aVoid) {}

method of the AsyncTask. This method has access to the UI thread.

Approach 2)

Another way might be to use

YourActivity.this.runOnUiThread(new Runnable() {
  public void run() {
    YourActivity.this.passField1.setImageResource(R.drawable.e00)
  }
});

(called from doInBackground) where passfield is not a local variable but class variable.

But approach 1 is the preferred way, I suggest you try that way first.

Answer 2

I think you would better use View.postDelayed(Runnable, long) in the onClickListener of your ImageViews to do this.