我有一个使用自定义适配器的ListView。 ListView中的每个元素都包含一个RadioButton和一个TextView。
这是我的适配器,它需要一个Employees的ArrayList(一个当前只包含名称的对象):
public class EmployeeAdapter extends ArrayAdapter<Employee> {
private ArrayList<Employee> listEmployees;
// Give the adapter the context and layout we are operating it, as well as a list of employees to put in the list.
public EmployeeAdapter(Context context, int layout, ArrayList<Employee> listEmployees) {
super(context, layout, listEmployees);
this.listEmployees = listEmployees;
}
// We override the basic getView function since our list is custom.
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
// If there is nothing left to put in the view, inflate the view in the rowemployee layout.
if (v == null){
LayoutInflater vi;
vi = LayoutInflater.from(getContext());
v = vi.inflate(R.layout.rowemployees, null);
}
Employee i = listEmployees.get(position);
// Check if there's still an employee in the list.
if (i != null){
TextView name = (TextView) v.findViewById(R.id.text_employeename);
name.setText(i.getName());
}
// Alternate row colors.
if (position % 2 == 0) {
v.setBackgroundColor(Color.parseColor("#FFFFFF"));
} else {
v.setBackgroundColor(Color.parseColor("#e5fff4"));
}
return v;
}
}
以下是我的XML布局中的listview声明:
<ListView android:id="@+id/employees_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingLeft="2dp"
android:paddingRight="1dp"
android:background="@drawable/borderlist"
android:choiceMode="singleChoice"
android:listSelector="#48ad82"
android:layout_below="@id/employees_header">
</ListView>
以下是ListView的每个项目的布局:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/row_employee"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:paddingTop="13dp"
android:paddingBottom="13dp"
android:descendantFocusability="blocksDescendants">
<RadioButton android:id="@+id/radio_employee"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:focusable="false"/>
<TextView
android:id="@+id/text_employeename"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"
android:layout_toRightOf="@id/radio_employee"
android:layout_marginTop="3dp"
android:layout_marginLeft="5dp"
android:focusable="false" />
</RelativeLayout>
我将一堆Employee对象输入到ArrayList中,然后将其推送到适配器,然后在列表中设置setOnItemClickListener。监听器包含以下代码:
OnItemClickListener onItemClickListener_employee
= new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id){
Toast.makeText(getApplicationContext(), String.valueOf(view.isSelected()) , Toast.LENGTH_SHORT).show();
}
};
view.isSelected()始终返回false。为什么?我一直试图弄清楚如何在列表中选择一个元素而不仅仅是一个TextView几个小时,而且SDK文档不是很有用,这已经过时了。
当我按下列表的项目时,似乎会按下TextView或RadioButton。不应该focusable =“false”阻止这个(Android custom ListView unable to click on items)?
答案 0 :(得分:1)
要选择项目,请将以下方法添加到适配器(未经测试的代码):
public Employee getItemAt(int position){
return listEmployees.get(position);
}
然后在你的处理程序中,将位置传递给上面的新适配器方法
public void onItemClick(AdapterView<?> parent, View view, int position, long id){
Employee e = adapter.getItemAt(position); //or whatever your adapter instance is named
Toast.makeText(getApplicationContext(), e.getName(), Toast.LENGTH_SHORT).show();
}
由于视图仅用于显示数据,因此您实际上并不关心视图本身(除非您想要删除它,hilight它等)。