Java find view by id

// The Optional is a field not obrigatory, but if you want to put the type of the variable Ex: Button, TextView, ImageButton, RecyclerView
// O Opcional é um campo não obrigatório, mas se quiser pode por o tipo da variável Ex: Button, TextView, ImageButton, RecyclerView
ItemInTheCode = (Optional/Opcional) findViewById(R.id.ItemInTheActivity);

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