如何将选定的项目推到列表视图android的顶部

Question

I have around 5 views in my listview and I want to push the selected view to top of the listview(set the position 0) and move down rest of the views. For example my views go like this from top to bottom

1-2-3-4-5

when I select the third one then I want the listview be like this:

3-1-2-4-5 but of course their last position id must be in order such 1-2-3-4-5

Answer 1

I made you a small example how you can reorder your list, please note that this only works for buttons ( you can just change the cast to a View if you are moving entire views. Also, this only works on one button for now, but you can change that easily!

Button btn = (Button)findViewById(R.id.button1);
btn.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View arg0) {
        // create a new list
        ArrayList<Button> list = new ArrayList<Button>();
        ScrollView view = (ScrollView)findViewById(R.id.scrollView1);

        // add your clicked element on position 0
        list.add ( (Button) arg0 );

        for ( int i = 0; i < view.getChildCount(); i++ ) {
            if ( view.getChildAt(i) != arg0 ) {
                list.add( (Button) view.getChildAt(i));
            }
        }

        view.removeAllViews();

        for ( int x = 0; x < list.size(); x++ ) {
            view.addView(list.get(x));
            list.remove(x);
        }
    }
});