Can't retrieve Firebase InstanceId Token after updating to newest library - firebase

Question

Okay so after updating to the newest firebase messaging library, I can't seem to retrieve the token. I t said in the docs that it should not be run in the main thread but when I tried, it still didn't work. So I simply removed it. What could I be doing wrong?
Below is my try/catch code.
String device_token;
try {
device_token = FirebaseInstanceId.getInstance().getToken(R.string.sender_id, "FCM");
student_token_reference = FirebaseDatabase.getInstance().getReference().child("MakeUpArtists_Info").child(uid);
student_token_reference.child("device_token").setValue(device_token).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
DatabaseReference check_variablesRef = FirebaseDatabase.getInstance().getReference().child("MakeUpArtists_Info").child(FirebaseAuth.getInstance().getCurrentUser().getUid()).child("Verification");
check_variablesRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
String id_card = dataSnapshot.child("id_card").getValue().toString();
String image = dataSnapshot.child("image").getValue().toString();
if (id_card.equals("Not yet") && image.equals("Not yet")) {
Toast.makeText(LoginActivity.this, "Please finish uploading your documents", Toast.LENGTH_SHORT).show();
Intent id_card_intent = new Intent(LoginActivity.this, IDcard.class);
startActivity(id_card_intent);
finish();
} else if (id_card.equals("Received") && image.equals("Received")) {
Intent intentMain = new Intent(LoginActivity.this, MainActivity.class);
intentMain.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intentMain);
finish();
} else if (id_card.equals("Received") && image.equals("Not yet")) {
Toast.makeText(LoginActivity.this, "Please upload your profile picture", Toast.LENGTH_SHORT).show();
Intent success_intent = new Intent(LoginActivity.this, DisplayProfile.class);
startActivity(success_intent);
finish();
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
});
} catch (IOException e) {
e.printStackTrace();
}
Any help would be greatly appreciated!

Answer 1

The Firebase Release Notes for the June 28 release recommend using FirebaseInstanceId.getInstance().getInstanceId(). Here is an example (as you requested in comments) of how to do that:
FirebaseInstanceId.getInstance().getInstanceId().addOnCompleteListener(
new OnCompleteListener<InstanceIdResult>() {
#Override
public void onComplete(Task<InstanceIdResult> task) {
if (task.isSuccessful()) {
final InstanceIdResult iidResult = task.getResult();
final String token = iidResult.getToken();
Log.d(TAG, "token=" + token);
// process token as you need...
} else {
Log.e(TAG, "get IID/token failed", task.getException());
}
}
});