How do I pass this information out of onDataChange into the same activity all within onCreate ....
mDatabase.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String teste = (String) (dataSnapshot.child("texto").getValue());
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
Thank you in advance!
There are several ways to resolve this problem.
You can apply MVP or MVVM on your project and more efficiently modularize your project, making it more weakly coupled, so you can easily reuse your layers of data access.
This makes it easy to communicate between Activities, Fragments, Threads, Services, etc. You also have the option to use a native Android component, LocalBroadcast to do this, but it ends up getting more code and complicated.
I do not know if it's the best way but it works.
private String mResultadoTeste = null;
private Button mBtnTeste;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_agendamento);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
mBtnTeste = (Button) findViewById(R.id.nome);
mDatabase.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
mResultadoTeste = (String) (dataSnapshot.child("texto").getValue());
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
mBtnTeste.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
metodo2();
}
});
}
//Fora do OnCreate
metodo2(){
Toast.makeText(AgendamentoActivity.this, "Mensagem" +mResultadoTeste, Toast.LENGTH_LONG).show();
}