CODEWITHSUNDEEP
androidandroid-listview
Junaid
Junaid

Reputation: 7860

How to reference the first is visible view in a listview in the getview method of the listview?

In my specific problem, I have a listview. In this listview I want the first row of the list always has a background color of green. I achieve that using the following code: 

listView.setSelection(3);
View element = listView.getChildAt(0);
element.setBackgroundColor(Color.GREEN);

in the backdrop I am using a custom adapter to populate the listview, as the rows get recycled, the green color is redundant over new rows which appear. Following is my code for the getView method: 

@Override
        public View getView(int position, View convertView, ViewGroup parent) {



            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            View first = listView.getChildAt(0); 

            if (convertView == null){ 
                convertView = inflater.inflate(R.layout.list, parent, false); 
            }
            TextView textView = ((TextView) convertView.findViewById(R.id.textView2));
            textView.setText(lyrics[position]);
            if(){ // Need to reference the first row here. 
            textView.setBackgroundColor(Color.GREEN); 
            }else {
                textView.setBackgroundColor(Color.WHITE);
            }
            return convertView;
        }
    }

So in my case I need to know the first visible position in the listview so as I can undo the repetitive background coloring. Is there any way by which I can achieve this? I am open to changing the logic too as long as that is feasible.

Upvotes: 2

Views: 674

Answers (2)

C B J
C B J

Reputation: 1858

@Override
    public View getView(int position, View convertView, ViewGroup parent) {



        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View first = listView.getChildAt(0); 

        if (convertView == null){ 
            convertView = inflater.inflate(R.layout.list, parent, false); 
        }
        TextView textView = ((TextView) convertView.findViewById(R.id.textView2));
        textView.setText(lyrics[position]);
        if(position==getFirstVisiblePosition()){ // Need to reference the first row here. 
            textView.setBackgroundColor(Color.GREEN); 
        }else {
            textView.setBackgroundColor(Color.WHITE);
        }
        return convertView;
    }
}

Upvotes: 1

gunar
gunar

Reputation: 14710

ListView's views are recycled, so in your adapter getView method you should have - probably just before return convertView:

if(position == 0) {
    convertView.setBackgroundColor(Color.GREEN);
} else {
    convertView.setBackgroundColor(Color.WHITE); // or whatever color
}
return convertView;

No need for below code that you have:

View element = listView.getChildAt(0);
element.setBackgroundColor(Color.GREEN);

Upvotes: 2

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