Question

im novice to android.For displaying random images i used arraylist.

ArrayList<Integer> List = new ArrayList<Integer>();
        for(int i=0;i<10;i++) 
        { 
            List.add(i);
            System.out.println("Random Images"+List.add(i));
        }
        Collections.shuffle(List);

        for(int i=0;i<10;i++){
            imageArr[i] = (ImageView)findViewById(id[List.get(i)]);
            System.out.println("Display Images"+List.get(i));
        }
    }

it is running correctly in logcat but what should do to display images on emulator screen. Pls Suggest

Answer 1

You will need an ImageView to display Images on the Screen.
You can display drawable, bitmaps, …
The easiest way to do this create your main.xml like this:

<ImageView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/myImageView" />

Then call in your code (maybe in the onCreate):

ImageView imgView = (ImageView)  findViewById(R.id.myImageView);

Then make a Drawable Array or an ArryList with bitmaps, whatever.
Get a Random value (like Math.random()) and fetch a random image from array or arraylist like

Drawable drawable = drawableArray[YOURRANDOMNUMBER];

and set the Drawable to the imageview.

imgView .setImageDrawable(drawable);

Hope this helps 🙂