Question

I am new to Java. I have runtime error at the line containing myImageViews[0].v1 = new ImageView(context). Is something wrong there?

class MyImageViews
{
    ImageView v1;
    ImageView v2;
}

MyImageViews[] myImageViews;

protected class MyLayout extends RelativeLayout {
    public MyLayout(Context context) {
        super(context);
        myImageViews = new MyImageViews[10];
        myImageViews[0].v1 = new ImageView(context); //runtime error at this line   
    }   
}

Answer 1

You have created an array that can contain MyImageViews instances but have not yet created an instance. myImageViews[0] is null.

Try changing

myImageViews = new MyImageViews[10];

to

myImageViews = new MyImageViews[10];
for (int i = myImageViews.length; --i >= 0;) {
  myImageViews[i] = new MyImageViews();
}