Android 自定义ExpandableListView在“时崩溃”；setAdapter"；
我试图创建一个自定义的ExpandableListView，但它总是给出一个NullPointException。我试过调试它，但它总是在myExpandableList.setAdapter（listAdapter） 我搜索了其他解决方案，在“ManagerStactivity”中发送上下文。此表单和“此表单没有帮助 代码示例： 公共类ManagerStactivity扩展了Sherlock活动{Android 自定义ExpandableListView在“时崩溃”；setAdapter"；,android,call,expandablelistview,expandablelistadapter,expandable,Android,Call,Expandablelistview,Expandablelistadapter,Expandable,我试图创建一个自定义的ExpandableListView，但它总是给出一个NullPointException。我试过调试它，但它总是在myExpandableList.setAdapter（listAdapter） 我搜索了其他解决方案，在“ManagerStactivity”中发送上下文。此表单和“此表单没有帮助 代码示例： 公共类ManagerStactivity扩展了Sherlock活动{ @Override protected void onCreate(Bundle savedIn
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_manager_list);
// Get the ExpandableListView
ExpandableListView managerList = (ExpandableListView) findViewById(R.id.list_manager);
ManagerListAdapter listAdapter = new ManagerListAdapter(ManagerListActivity.this);
ArrayList<Subordinate> managers = new ArrayList<Subordinate>();
ArrayList<Employee> employees = new ArrayList<Employee>();
ArrayList<String> listDataHeader = new ArrayList<String>();
HashMap<String, List<String>> listDataChild = new HashMap<String, List<String>>();
@覆盖
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u manager\u列表）；
//获取ExpandableListView
ExpandableListView管理器列表=（ExpandableListView）findViewById（R.id.list\u管理器）；
ManagerListAdapter listAdapter=新的ManagerListAdapter（ManagerListActivity.this）；
ArrayList管理器=新建ArrayList（）；
ArrayList employees=新的ArrayList（）；
ArrayList listDataHeader=新的ArrayList（）；
HashMap listDataChild=新HashMap（）；
for (int i = 0; i < managers.size(); i++) {
// Name the headers
listDataHeader.add(managers.get(i).getFirstName());
List<String> childList = new ArrayList<String>();
for (int j = 0; j < managers.get(i).getProjects().size(); j++) {
// Name the children
childList.add(managers.get(i).getProjects().get(j)
.getProjectName());
}
listDataChild.put(listDataHeader.get(i), childList);
}
listAdapter = new ManagerListAdapter(this, managers, listDataChild,
employees);
managerList.setAdapter(listAdapter);
}
for（int i=0；iprivate Context context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
private ArrayList<Subordinate> managers;
private ArrayList<Employee> employees;
String phone = "";
public ManagerListAdapter(Context context, ArrayList<Subordinate> managers,
HashMap<String, List<String>> listDataChild,
ArrayList<Employee> employees) {
this.context = context;
for (int i = 0; i < managers.size(); i++) {
_listDataHeader.add(managers.get(i).getFirstName());
}
this._listDataChild = listDataChild;
this.employees = employees;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_manager_child,
null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.manager_child);
txtListChild.setText(childText);
return convertView;
}
@Override
public View getGroupView(int pos, boolean isExpanded, View view,
ViewGroup parent) {
if (view == null) {
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = infalInflater.inflate(R.layout.list_manager_item, null);
}
TextView lblListHeader = (TextView) view
.findViewById(R.id.manager_firstname);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(managers.get(pos).getFirstName());
// Use the holder to pass data to the call button
RowViewHolder holder = new RowViewHolder();
holder.callImg = (ImageView) view.findViewById(R.id.gl_call);
holder.callImg.setOnClickListener(callListener);
view.setTag(holder);
phone = employees.get(pos).getContact();
return view;
}
// Call button handling
private OnClickListener callListener = new OnClickListener() {
@Override
public void onClick(View v) {
try {
Intent i = new Intent(Intent.ACTION_CALL);
i.setData(Uri.parse("tel:" + phone));
context.startActivity(i);
} catch (Exception e) {
e.printStackTrace();
}
}
};
protected static class RowViewHolder {
public ImageView callImg;
}
私有上下文；
私有列表_listDataHeader；//头标题
//标题标题、子标题格式的子数据
私有HashMap_listDataChild；
私人ArrayList经理；
私人ArrayList员工；
字符串phone=“”；
公共管理器ListAdapter（上下文、数组列表管理器、，
HashMap listDataChild，
ArrayList（员工）{
this.context=上下文；
对于（int i=0；i