GridLayoutManager with different column count per

问题:

I'm trying to build a RecyclerView with a GridLayoutManager which has a variable column count per row, something like this:

The sum of the width of all items in the same row will always be the screen width.

I tried to re-organize the list of items, grouping them by list of rows, and then inflating a LinearLayout per row. It didn't work quite well.

So I'm stuck and out of ideas. Any help would be really appreciated

回答1:

You can use GridLayoutManager. To have different column count in row you have to override setSpanSizeLookup.

Example:

//spanCount = 3 (just for example)
GridLayoutManager gridLayoutManager = new GridLayoutManager(getAppContext(), spanCount);
gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
    @Override
    public int getSpanSize(int position) {
        //define span size for this position
        //some example for your first three items
        if(position == item1) {
            return 1; //item will take 1/3 space of row
        } else if(position == item2) {
            return 2; //you will have 2/3 space of row
        } else if(position == item3) {
            return 3; //you will have full row size item
        }
     }
});

I code sample above I just show have you can change item size. Pay attention that spanSize <= spanCount.