Leanback VerticalGridFragment removes the top spacing

Question

I use VerticalGridFragment to display elements in a grid. I don’t need to show a search or title, and I want the lines to start from the top of the screen with no margins. Any help?

Answer 1

You need to create a new class called CustomVerticalGridPresenter and put the following code into it .

public class CustomVerticalGridPresenter extends VerticalGridPresenter {

    VerticalGridView gridView;

    CustomVerticalGridPresenter(int zoom, boolean val){
        super(zoom, val);
    }

    @Override
    protected void initializeGridViewHolder(ViewHolder vh) {
        super.initializeGridViewHolder(vh);
        gridView = vh.getGridView();
        int top = 20;//this is the new value for top padding
        int bottom = gridView.getPaddingBottom();
        int right = gridView.getPaddingRight();
        int left = gridView.getPaddingLeft();
        gridView.setPadding(left,top,right,bottom);
    }
}

Then in the verticalgridfragment class use

CustomVerticalGridPresenter videoGridPresenter = new 
CustomVerticalGridPresenter(ZOOM_FACTOR, false);

instead

VerticalGridPresentervideoGridPresenter = new VerticalGridPresenter(ZOOM_FACTOR, false);

Answer 2

VerticalGridPresenter VerticalGridFragment, VerticalGridView . CustomVerticalGridPresenter ( VerticalGridPresenter) :

@Override
protected void initializeGridViewHolder(ViewHolder vh) {
    super.initializeGridViewHolder(vh);
    gridView = vh.getGridView();
    int top= 20;//this is the new value for top padding
    int bottom = gridView.getPaddingBottom();
    int right = gridView.getPaddingRight();
    int left = gridView.getPaddingLeft();
    gridView.setPadding(left,top,right,bottom);
}

VerticalGridFragment CustomVerticalGridPresenter :

 CustomVerticalGridPresenter gridPresenter = new CustomVerticalGridPresenter();
    gridPresenter.setNumberOfColumns(NUM_COLUMNS);
    setGridPresenter(gridPresenter);

Answer 3

First of follow this steps to move the rows up which is by default given margins by Lean back Library.

1. Go to you SDK.

2. Inside SDK -> extras -> android -> support -> v17 -> leanback -> res -> values.

3. Inside values folder copy the dimens.xml inside your current project and copy to your projects res -> values folder.

Now you have the file name dimens.xml inside your values folder.

Now open the dimens.xml file which you have copied.

Change the value for property defined below. By default it will given 168dp around that. So make it less to decrease the top margin as i have given below.

<dimen name="lb_browse_rows_margin_top">35dp</dimen>

Browse Fragment.

Answer 4

windowAlignment VerticalGridView. ...

verticalGridView.windowAlignment = BaseGridView.WINDOW_ALIGN_LOW_EDGE //this will remove the top margin
verticalGridView.windowAlignmentOffset = 0
verticalGridView.windowAlignmentOffsetPercent = 25f //find correct values for your case