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我想在DialogFragment上设置监听器,但不断收到空指针异常。当设置OnCancelListener时DialogFragment空指针
这是我DialogFragment子类:
public static class TermsFragment extends DialogFragment {
TextView t;
private static String terms;
static TermsFragment newInstance(String termsCond) {
TermsFragment f = new TermsFragment();
terms = termsCond;
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
getDialog().setCanceledOnTouchOutside(true);
View v = inflater.inflate(R.layout.termsandconditions, container, false);
getDialog().setTitle("Terms and Conditions");
t = (TextView) v.findViewById(R.id.termsText);
t.setText(terms);
return v;
}
}
,我从我的主要SherlockFragment调用它是这样的:
TermsFragment newFragment = TermsFragment.newInstance(terms);
newFragment.show(getFragmentManager(), "dialog");
这说明我的对话框罚款。当我尝试添加一个按钮侦听这样的:
TermsFragment newFragment = TermsFragment.newInstance(terms);
Button cancel = (Button) newFragment.getDialog().findViewById(R.id.btnCancel);
cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.e(TAG, "Clicked");
}
});
或一般onCancel侦听器是这样的:
newFragment.getDialog().setOnCancelListener(new Dialog.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
showLoadingView(false);
}
});
我的应用程序一个空指针异常崩溃显示对话框之前。
我在做什么错?