我是android的新手。现在我正在AsyncTask
ArrayAdapter
进行。当我使用ProgressDialog
时,它显示以下错误,
android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
04-25 08:07:40.881: E/AndroidRuntime(6417): at android.view.ViewRootImpl.setView(ViewRootImpl.java:563)
04-25 08:07:40.881: E/AndroidRuntime(6417): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:269)
以下是我的代码,
public class ExpandableListAdapter1 extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
CommonFunctions cfObj;
public ExpandableListAdapter1(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(final 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_seconditem, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
Button mtAccept=(Button)convertView.findViewById(R.id.btnAccept);
Button mtReject=(Button)convertView.findViewById(R.id.btnReject);
mtAccept.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
System.out.println("Accept clickable");
System.out.println("Group number"+groupPosition);
System.out.println("child number"+childPosition);
//_context.startService(new Intent(_context, GroupResponds.class));
new Worker().execute();
}
});
mtReject.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
System.out.println("Reject clickable");
}
});
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
ImageView img_selection=(ImageView) convertView.findViewById(R.id.imageside);
int imageResourceId = isExpanded ? R.drawable.btn_up
: R.drawable.btn_down;
img_selection.setImageResource(imageResourceId);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
private class Worker extends AsyncTask<Integer, String, Integer>
{
ProgressDialog dialog;
boolean device_error=false;
String temp_encrypted_device_id=null;
String result=null;
String device_id="";
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
cfObj=new CommonFunctions(_context);
dialog=new ProgressDialog(_context);
System.out.println("first....");
dialog.setOnCancelListener(new DialogInterface.OnCancelListener(){
public void onCancel(DialogInterface dialog)
{
Worker.this.cancel(true);
}
});
System.out.println("second....");
dialog.setMessage(_context.getResources().getString(R.string.initilalising));
System.out.println("third....");
if(dialog==null){
System.out.println("dialog null....");
}else{
dialog.show();
}
System.out.println("fourth....");
}
@Override
protected Integer doInBackground(Integer... params) {
// TODO Auto-generated method stub
device_id=cfObj.get_device_details();
if(device_id==null||device_id=="")
{
device_error=true;
}
else
{
device_error=false;
}
if(device_error!=true)
{
publishProgress(_context.getString(R.string.internet_connectivity_checking));
}
return null;
}
@Override
protected void onPostExecute(Integer result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
System.out.println("device id"+device_id);
dialog.dismiss();
}
@Override
protected void onProgressUpdate(String... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
dialog.setMessage(values[0]);
}
}
答案 0 :(得分:0)
似乎您的成员变量_context
是无效的Context
,用于创建对话框。您需要将Activity
传递给适配器,而不是通过getApplicationContext()
获取的应用程序上下文。