Android 在 Fragment 类中显示 ProgressDialog
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Show ProgressDialog in Fragment class
提问by Sini Inis
I am trying to show a ProgressDialogwithin a Fragmentclass. The following code just works within an Activityclass but not for Fragment. Can somebody please help me on this, why this ProgressDialogimplementaion just works within an Activityand not for a Fragment?
我试图ProgressDialog在一个Fragment班级中展示一个。以下代码仅适用于一个Activity类，但不适用于Fragment. 有人可以帮我解决这个问题，为什么这个ProgressDialog实现只适用于 aActivity而不是适用于 a Fragment？
private class ProcessUpdateProfile extends
AsyncTask<String, String, JSONObject> {
private ProgressDialog nDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
nDialog = new ProgressDialog(PFragment.this); //Here I get an error: The constructor ProgressDialog(PFragment) is undefined
nDialog.setMessage("Loading..");
nDialog.setTitle("Checking Network");
nDialog.setIndeterminate(false);
nDialog.setCancelable(true);
nDialog.show();
}
}
回答by M D
Try this in Fragment
试试这个 Fragment
nDialog = new ProgressDialog(getActivity());
回答by navneet sharma
ProgressDialogtake Contextinput so use getActivity()in object creation.
ProgressDialog接受Context输入，以便getActivity()在对象创建中使用。
ProgressDialog dialog = ProgressDialog.show(getActivity(), "Loading...", "Please wait...", true);
