Add images to a HorizontalScrollView

Question

I want to create a HorizontalScrollView which reads the images from drawable folder. The name of the images are "image1" "image2" ... "image20". I don´t know how I can use the numbers to read them. Here is what I have:

protected void onCreate(Bundle savedInstanceState) {

   super.onCreate(savedInstanceState);
   setContentView(R.layout.main);
   LinearLayout sv = (LinearLayout) findViewById (R.id.images);
   for (int i=1 ; i<20; i++){
       ImageView iv = new ImageView (this);
       iv.setBackgroundResource (R.drawable.image1);
       sv.addView(iv);
   }
}

Answer 1

You can do that in two ways.

First one is to create array with the id's of images you want to use and in your for cycle, just add the images to your layout:

int[] images = new int[]{R.drawable.image1, R.drawable.image2, ... R.drawable.image20};
LinearLayout sv = (LinearLayout) findViewById (R.id.images);
for (int i=0 ; i<20; i++){
   ImageView iv = new ImageView (this);
   iv.setBackgroundResource (images[i]);
   sv.addView(iv);
}

Or the second way, you can create something similar to this:

 for (int i=1 ; i<=20; i++){
   String uri = "drawable/image"+i;
   // int imageResource = R.drawable.image1;
   int imageResource = getResources().getIdentifier(uri, null, getPackageName());

   ImageView iv = new ImageView (this);
   iv.setBackgroundResource (imageResource);
   sv.addView(iv);
 }

I didn't tested the codes, but I think they should work.