whenever I use the app switcher or the app gets paused in any other way then upon resuming it I will get a NullPointerException when trying to use findViewById in my fragment. The same happens when trying to use getActivity() or anything related to the Main activity. I've tried checking of the fragment is attached or not with isAdded() and it returns true but still gives the error. (Don't mind the way the code looks, I still need to clean it up)
All irrelevant classes and methods are not included (ex. Profanity class).
MainActivity onStart method (Launch activity)
@Override
public void onStart() {
super.onStart();
Profanity.downloadList();
if (AskForPermissions()) {
if (mAuth.getCurrentUser() != null) {
mAuth.getCurrentUser().reload().addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.MainFragment, new LoginFragment()).commit();
}
}).addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.MainFragment, new HomeFragment()).commit();
}
});
} else {
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.MainFragment, new LoginFragment()).commit();
}
} else {
onStart();
}
}
HomeFragment (The one that crashes, crash happens under Started() on the 4th line)
@SuppressWarnings("all")
@Override
public void onStart() {
super.onStart();
loadVariables();
final String UUID = ((MainActivity) getActivity()).mAuth.getCurrentUser().getUid();
User.UUID = UUID;
if (User.userName == null || User.userName.equals("")) {
Functions.loadUserData(UUID).addOnCompleteListener(new OnCompleteListener() {
@Override
public void onComplete(@NonNull Task task) {
if (task.getResult() == null) {
final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Choose your username");
final EditText input = new EditText(getActivity());
input.setInputType(InputType.TYPE_CLASS_TEXT);
builder.setView(input);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
final AlertDialog dialog = builder.create();
dialog.show();
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (input.getText() != null && !input.getText().toString().equals("") && !input.getText().toString().equals(" ")) {
if (input.getText().toString().toCharArray().length > 16) {
dialog.dismiss();
Functions.showBottomMessage(getView(), "Your username must be maximum 16 characters.");
dialog.show();
} else if (Profanity.contains(input.getText().toString())) {
dialog.dismiss();
Functions.showBottomMessage(getView(), "Please refrain from using restricted words in your username.");
input.setText("");
dialog.show();
} else {
User.userName = input.getText().toString();
dialog.dismiss();
FirebaseReferences.users.child(User.UUID).child("name").setValue(User.userName);
Functions.showBottomMessage(getView(), "Username saved.");
}
} else {
dialog.dismiss();
Functions.showBottomMessage(getView(), "Please enter a valid username.");
dialog.show();
}
}
});
Started();
} else {
HashMap temp = (HashMap) task.getResult();
if (temp.containsKey("name")) {
User.userName = temp.get("name").toString();
} else {
final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Choose your username");
final EditText input = new EditText(getActivity());
input.setInputType(InputType.TYPE_CLASS_TEXT);
builder.setView(input);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
final AlertDialog dialog = builder.create();
dialog.show();
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (input.getText() != null && !input.getText().toString().equals("") && !input.getText().toString().equals(" ")) {
User.userName = input.getText().toString();
dialog.dismiss();
FirebaseReferences.users.child(UUID).child("name").setValue(input.getText().toString());
} else {
dialog.dismiss();
dialog.show();
}
}
});
}
if (temp.containsKey("place")) {
User.place = temp.get("place").toString();
}
if (temp.containsKey("ratedImages")) {
User.ratedImages = (ArrayList<String>) temp.get("ratedImages");
}
if (temp.containsKey("developer")) {
if (Boolean.valueOf(temp.get("developer").toString().toLowerCase()))
User.isDeveloper = true;
}
Started();
}
}
});
} else {
Started();
}
}
@SuppressWarnings("all")
private void Started() {
mainImageProgressBar.setVisibility(View.VISIBLE);
secondaryImageProgressBar.setVisibility(View.VISIBLE);
CacheHandler.update(getActivity(), imageView, secondImageView, true);
/*THIS IS THE FIRST CRASH POINT - */getView().findViewById(R.id.fabSendImage).setOnClickListener(getBtnSendImageOnClickListener());
getView().findViewById(R.id.btnReportImage).setOnClickListener(btnReportImageOnClick);
}
