Android应用开发 对话框创建

Question

private void showDialog(String msg){
Builder builder =**new AlertDialog.Builder(HttpUtil.this);**
// AlertDialog.Builder builder =new Builder(HttpUtil.this);
builder.setMessage(msg)
.setCancelable(false)
.setPositiveButton("确定", new DialogInterface.OnClickListener(){
public void onClick (DialogInterface dialog,int id){

       }
   });
   AlertDialog alert =builder.create();
   alert.show();

}
加粗部分提示The constructor AlertDialog.Builder(HttpUtil) is undefined

Answer 1

new AlertDialog.Builder需要传递的参数是上下文，你的HttpUtil.this是什么？如果HttpUtil.this是Activity，那么改成new AlertDialog.Builder(((Activity)HttpUtil.this));或者 new AlertDialog.Builder(getActivity());