Android 无法在阵列适配器中创建警报对话框
我有Android 无法在阵列适配器中创建警报对话框,android,android-fragments,Android,Android Fragments,我有Fragment类,它有ListView,由数组适配器实现。当单击列表视图时,我想显示确认对话框。下面是我的阵列适配器源代码 Context _context; int layoutResourceId; List<OrderListInfo> _listOrderListInfoAdapter = new ArrayList<OrderListInfo>(); private String ButtonFlag = ""; Activity _activity;
Fragment
类,它有ListView
,由数组适配器实现。当单击列表视图时,我想显示确认对话框。下面是我的阵列适配器源代码
Context _context;
int layoutResourceId;
List<OrderListInfo> _listOrderListInfoAdapter = new ArrayList<OrderListInfo>();
private String ButtonFlag = "";
Activity _activity;
public OrderDetailListAdatper(Context context, int Resource,
List<OrderListInfo> listorderlistInfo) {
super(context, Resource, listorderlistInfo);
_context = context;
_listOrderListInfoAdapter = listorderlistInfo;
layoutResourceId = Resource;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder = null;
LayoutInflater inflater = (LayoutInflater) _context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (row == null) {
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
TextView txtProductCode = (TextView) row
.findViewById(R.id.txtProductCode);
Button btnDelete = (Button) row.findViewById(R.id.btnRemove);
holder.txtProductCode = txtProductCode;
row.setTag(holder);
} else {holder = (ViewHolder) row.getTag(); }
OrderListInfo _orderListInfoAdapter = _listOrderListInfoAdapter
.get(position);
holder.txtProductCode.setText(_orderListInfoAdapter.getProductCode()
.toString()
);
holder.btnDelete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder alert = new AlertDialog.Builder(view.getContext());
alert.setMessage("Do you want to delete?");
alert.setNegativeButton("CANCEL",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int whichButton) {
dialog.cancel();
}
});
alert.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int whichButton) {
OrderDetailListAdatper.this._listOrderListInfoAdapter
.remove(position); OrderDetailListAdatper.thisnotifyDataSetChanged();
}
});
AlertDialog alertDialog = alert.create();
alertDialog.show();
}
});
}
return row;
}
我得到的错误是
android.view.WindowManager$BadTokenException:
无法添加窗口--标记null不适用于应用程序。我怎样才能解决这个问题
OrderDetailListAdatper adapter = new OrderDetailListAdatper(Yourclass.this,Resource,
listorderlistInfo);
//set your adapter..
在您的getview中
holder.btnDelete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder alert = new AlertDialog.Builder((Activity)_context);
alert.setMessage("Do you want to delete?");
alert.setNegativeButton("CANCEL",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int whichButton) {
dialog.cancel();
}
});
alert.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int whichButton) {
OrderDetailListAdatper.this._listOrderListInfoAdapter
.remove(position); OrderDetailListAdatper.thisnotifyDataSetChanged();
}
});
alert.create().show(); // btw show() creates and shows it..
}
});
此外,我认为alert dialog-(builder)已被弃用,请将alertdialog放入dialogfragment,或创建dialogfragment以供确认。是否已将上下文传递给构造函数中的arrayadapter?请使用
getContext
而不是View.getContext
。。或您指定的上下文。。并确保您的上下文指定了activity@PramodYadav,@Elltz我已经发布了我的构造函数。我试图更改getContext而不是View.getContext,但仍然出现相同的错误。请仅使用getContext()而不是View.getContext()_context@PramodYadav,无效果,仍然会出错。
holder.btnDelete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder alert = new AlertDialog.Builder((Activity)_context);
alert.setMessage("Do you want to delete?");
alert.setNegativeButton("CANCEL",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int whichButton) {
dialog.cancel();
}
});
alert.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int whichButton) {
OrderDetailListAdatper.this._listOrderListInfoAdapter
.remove(position); OrderDetailListAdatper.thisnotifyDataSetChanged();
}
});
alert.create().show(); // btw show() creates and shows it..
}
});