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package se.leap.bitmaskclient.providersetup.fragments;
import android.content.Context;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.viewpager2.widget.ViewPager2;
import se.leap.bitmaskclient.providersetup.activities.SetupActivityCallback;
public class BaseSetupFragment extends Fragment {
SetupActivityCallback setupActivityCallback;
private boolean callFragmentSelected = false;
private final ViewPager2.OnPageChangeCallback viewPagerCallback = new ViewPager2.OnPageChangeCallback() {
@Override
public void onPageSelected(int position) {
super.onPageSelected(position);
if (position == BaseSetupFragment.this.position) {
handleCallFragmentSelected();
} else {
callFragmentSelected = false;
}
}
};
private final int position;
public BaseSetupFragment(int position) {
this.position = position;
}
@Override
public void onAttach(@NonNull Context context) {
super.onAttach(context);
if (getActivity() instanceof SetupActivityCallback) {
setupActivityCallback = (SetupActivityCallback) getActivity();
setupActivityCallback.registerOnPageChangeCallback(viewPagerCallback);
if (setupActivityCallback.getCurrentPosition() == position) {
handleCallFragmentSelected();
}
} else {
throw new IllegalStateException("These setup fragments are closely coupled to SetupActivityCallback interface. Activities instantiating them are required to implement the interface");
}
}
private void handleCallFragmentSelected() {
if (!callFragmentSelected) {
callFragmentSelected = true;
onFragmentSelected();
}
}
@Override
public void onDetach() {
super.onDetach();
setupActivityCallback.removeOnPageChangeCallback(viewPagerCallback);
setupActivityCallback = null;
}
public void onFragmentSelected() {
}
}
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