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Check whether activity is null.
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@@ -52,6 +52,7 @@ public class AliasDialogFragment extends AppCompatDialogFragment {
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setStyle(STYLE_NO_TITLE, R.style.BriarDialogTheme);
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if (getActivity() == null) return;
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((BriarActivity) getActivity()).getActivityComponent().inject(this);
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viewModel = ViewModelProviders.of(getActivity(), viewModelFactory)
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.get(ConversationViewModel.class);
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