How to eliminate the space left by invisible views on the screen?

Question

I am working on an android application and my question is: When the user logs in the application, it checks the permissions of the same.
How can I make this button invisible and organize so as not to be blank the space that this button occupied ?

Below are some buttons I’m using in the Menu class:

  btnDadosCadastrais      = (Botton) findViewById(R.id.dadosCadastrais);
        btnDadosCadastrais.setOnClickListener(this);

        btnDebitosPendentes     = (CardView)findViewById(R.id.debitosPendentes);
        btnDebitosPendentes.setOnClickListener(this);

        btnHistoricoPagementos  = (Botton) findViewById(R.id.HistoricoPagamento);
        btnHistoricoPagementos.setOnClickListener(this);

        btnSolicitarAtendimento = (Botton) findViewById(R.id.solicitarAtendimento);
        btnSolicitarAtendimento.setOnClickListener(this);

        btnHistoricoAtendimento = (Botton) findViewById(R.id.historicoAtendimento);
        btnHistoricoAtendimento.setOnClickListener(this);

        btnGraficosDeUso        = (Botton) findViewById(R.id.graficoDeUso);
        btnGraficosDeUso.setOnClickListener(this);

        btnExtratoDeAutenticacao= (Botton) findViewById(R.id.ExtratoAutenticacao);
        btnExtratoDeAutenticacao.setOnClickListener(this);

Answer 1

The visibility of a view can have three states:

• Visible - the view is visible on the screen.
• Invisible - the view is not visible but takes up space.
• Gone - the view is not visible and does not take up space.

Visibility is controlled in xml by the attribute android:visibility and in java through the method setVisibility().

For what you want to use the state Gone

java:

button.setVisibility(View.GONE);

xml:

android:visibility="gone"

Answer 2

Within the class of Activity, use the object containing this button and when enter the condition to become invisible implement:

button.setVisibility(View.GONE);

If you have any conditions to return visibility, use:

button.setVisibility(View.VISIBLE);