ListView getcount行并在TextView中显示

Question

在我的家庭活动中。我有listview的id列表和带有id count的textview。

以下是代码：

ListView lv = getListView();

lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {

int count = 0;
for (int i = 0; i <= list.getLastVisiblePosition(); i++) {
if (list.getChildAt(i) != null) {

count++;
counter.setText(count + "");
}
}

我想在listview

中的行的textview中显示

Answer 1

您可以使用getLastVisiblePosition（）方法计算行数

int count=0;
for(int i = 0; i  <= list.getLastVisiblePosition(); i++)
        {
            if(list.getChildAt(i)!= null)
            {

                count++;  // saying that view that counts is the one that is not null, because sometimes you have partially visible items....
            }
        }

然后设置文本

counter.setText(count + "");

修改 - 试试这样的事情，

ListView lv = getListView();

lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {

int count = 0;
for (int i = 0; i <= list.getLastVisiblePosition(); i++) {
if (list.getChildAt(i) != null) {

count++;

}
}
counter.setText(count + "");

Answer 2

是否要显示ListView中有多少项目或屏幕上可见？

第一个选项：

如果使用ListView，则必须使用一些具有方法的ListAdapter（例如BaseAdapter或ArrayAdapter的后代）

getCount()

返回适配器和ListView中的项目数。

修改

TextView countTextView; // here you want to set number of items
ListView lv; // your ListView
BaseAdapter adapter; // your adapter, that is used with ListView

// call this method in some listener
private void showNumberOfItems() {
     int count = adapter.getCount();
     countTextView.setText(String.valueOf(count));
}