java代码中写得TableLayout，并且实现了空项的自动隐藏

// 更新热门商区的列表
TableLayout tableLayout = (TableLayout)searchActivityView.findViewById(R.id.id_for_search_activity_table_layout);
if(result.size()>=3) {
tableLayout.getChildAt(2).setVisibility(View.VISIBLE);
tableLayout.getChildAt(1).setVisibility(View.VISIBLE);
tableLayout.getChildAt(0).setVisibility(View.VISIBLE);
searchActivityView.setMoreAreasFirstLineWord(result.get(0));
searchActivityView.setMoreAreasSecondLineWord(result.get(1));
searchActivityView.setMoreAreasThirdLineWord(result.get(2));

} else if(result.size()==2) {
searchActivityView.setMoreAreasFirstLineWord(result.get(0));
searchActivityView.setMoreAreasSecondLineWord(result.get(1));
searchActivityView.setMoreAreasThirdLineWord("");
tableLayout.getChildAt(2).setVisibility(View.GONE);
tableLayout.getChildAt(1).setVisibility(View.VISIBLE);
tableLayout.getChildAt(0).setVisibility(View.VISIBLE);
} else if(result.size()==1) {
searchActivityView.setMoreAreasFirstLineWord(result.get(0));
searchActivityView.setMoreAreasSecondLineWord("");
searchActivityView.setMoreAreasThirdLineWord("");
tableLayout.getChildAt(2).setVisibility(View.GONE);
tableLayout.getChildAt(1).setVisibility(View.GONE);
tableLayout.getChildAt(0).setVisibility(View.VISIBLE);
} else if(result.size()==0) {
searchActivityView.setMoreAreasFirstLineWord("");
searchActivityView.setMoreAreasSecondLineWord("");
searchActivityView.setMoreAreasThirdLineWord("");
tableLayout.getChildAt(2).setVisibility(View.GONE);
tableLayout.getChildAt(1).setVisibility(View.GONE);
tableLayout.getChildAt(0).setVisibility(View.GONE);
}
setContentView(searchActivityView);