@Override
protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mColumnCount <= 0) {
boolean isLandscape = isLandscape();
mColumnCount = isLandscape ? mColumnCountLandscape : mColumnCountPortrait;
}
// our column width is the width of the listview
// minus it's padding
// minus the total items margin
// divided by the number of columns
mColumnWidth = calculateColumnWidth(getMeasuredWidth());
if (mColumnTops == null || mColumnTops.length != mColumnCount) {
mColumnTops = new int[mColumnCount];
initColumnTops();
}
if (mColumnBottoms == null || mColumnBottoms.length != mColumnCount) {
mColumnBottoms = new int[mColumnCount];
initColumnBottoms();
}
if (mColumnLefts == null || mColumnLefts.length != mColumnCount) {
mColumnLefts = new int[mColumnCount];
initColumnLefts();
}
}
