我尝试显示ListView,其中各个列表项具有动态数量的元素。每个项目列表都有一个日期的TextView。在该日期之后,可以有2-5个元素。
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使用此当前方法,它会在ListView项目的底部显示空白TextView。会有更好的方法吗?
我认为convertView
会有方法为其添加布局元素,但事实并非如此。
适配器的getView方法:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView == null){
holder = new ViewHolder();
convertView = this.inflater.inflate(R.layout.layout_list_item, parent, false);
holder.text_date_cashout = (TextView) convertView.findViewById(R.id.text_date_cashout);
holder.dynamic_views.add((TextView) convertView.findViewById(R.id.text_cashout1));
holder.dynamic_views.add((TextView) convertView.findViewById(R.id.text_cashout2));
holder.dynamic_views.add((TextView) convertView.findViewById(R.id.text_cashout3));
holder.dynamic_views.add((TextView) convertView.findViewById(R.id.text_cashout4));
holder.dynamic_views.add((TextView) convertView.findViewById(R.id.text_cashout5));
convertView.setTag(holder);
}
else{
holder = (ViewHolder) convertView.getTag();
}
//get and set date from current cashOutHistory
CashOutHistory coh = cashOutHistory.get(position);
holder.text_date_cashout.setText(coh.getDate());
//loop individual cashOuts to display their values
int i = 0;
for (CashOut co : coh.getCashOutHistory() ){
holder.dynamic_views.get(i).setText(co.toString());
i++;
}
return convertView;
}
private class ViewHolder{
TextView text_date_cashout;
ArrayList<TextView> dynamic_views = new ArrayList<TextView>(5);
}
列出项目布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:id="@+id/text_date_cashout" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:id="@+id/text_cashout1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:id="@+id/text_cashout2" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:id="@+id/text_cashout3" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:id="@+id/text_cashout4" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:id="@+id/text_cashout5" />
</LinearLayout>
编辑#1
循环显示并隐藏列表项中的TextView:
//loop individual cashOuts to display their values
int i = 0;
for (CashOut co : coh.getCashOutHistory() ){
holder.dynamic_views.get(i).setText(co.toString());
i++;
}
while(i < 5){
holder.dynamic_views.get(i).setVisibility(View.GONE);
i++;
}
答案 0 :(得分:0)
您可以使用以下方法隐藏您不需要为该特定项目显示的每个视图:
Boolean someCondition = true;
if (someCondition)
holder.dynamic_views.get(i).setVisibility(View.GONE);
希望这有帮助。