使GridView可垂直滚动

<GridView
    android:id="@+id/gridView"
    android:layout_width="match_parent"
    android:layout_height="200dp"
    android:numColumns="3"
    android:scrollbars="vertical"
    android:scrollbarStyle="outsideOverlay"
    android:scrollbarThumbVertical="@android:color/darker_gray"
    android:scrollbarSize="8dp"
    />

GridView gridView = findViewById(R.id.gridView);
gridView.setAdapter(adapter);

gridView.setOnScrollListener(new AbsListView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        // 滚动状态改变时的处理
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        // 滚动时的处理
    }
});