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To do well customized like this, I advise making an Edittext.
Example:
<EditText
      android:id="@+id/home_search"
      android:hint="pesquisar por nome ou profissão"
      android:textSize="15sp"
      android:inputType="textCapSentences"
      android:textColor="@android:color/white"
      android:textColorHint="@android:color/white"
      android:drawableLeft="@android:drawable/ic_menu_search"
      android:drawablePadding="8dp"
      android:paddingLeft="24dp"
      android:layout_marginLeft="24dp"
      android:layout_marginRight="24dp"
      android:background="@android:color/black"
      android:layout_width="match_parent"
      android:layout_height="45dp"
      android:imeOptions="actionSearch"
      android:imeActionLabel="Search"/>
That will be the result:
Ai in Java, you declare Edittext normally and add a setOnEditorActionListener in it
Example:
EditText home_search = (EditText) findViewById(R.id.home_search);
home_search.setOnEditorActionListener(new TextView.OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                if (actionId == EditorInfo.IME_ACTION_SEARCH ||
                        actionId == EditorInfo.IME_ACTION_DONE ||
                        actionId == KeyEvent.ACTION_DOWN ) {
                    String searchTerm = home_search.getText().toString();
                    if(searchTerm != null && searchTerm.length() > 2){
                        metodoQueRealizaABusca(searchTerm);
                        home_search.setText("");
                    }else{
                         Toast.makeText(this, "Digite pelo menos 3 letras para buscar",Toast.LENGTH_SHORT).show();
                    }
                    return true;
                }
                else {
                    return false;
                }
            }
        });
In this scheme that I use, the user has to enter at least 3 letters to be able to search.
And the search will stay within the method method) where he will receive the searchTerm as a parameter.


Did you ever start any code? post it too, it gets easier to help
– Leonardo Dias
Pretty much nothing: <Searchview android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="@string/search" android:queryHint="@string/search" android:Gravity="center" android:searchHintIcon="@drawable/ic_busca_menu"/>
– carlos giovani casilo
Carlos, I left a reply below with an example of code that I use.
– Leonardo Dias