Get random string from array in Android and place it in a text view

Question

I have as a small project to create an array of Name, Surname and Email which I have created using xml in the value

This is my xml named Name with a String named names

<resources>
    <string name="names">
        <item>Ivan</item>
        <item>Santiago</item>                    
        .....
    </string>
</resources>

This is my XML named Surnames with a String called surnames

<resources>
    <string name="surnames">
        <item>Rodríguez</item>
        <item>Gómez</item>
        <item>López</item>
        .....
    </string>
</resources>

public class Registro extends AppCompatActivity implements View.OnClickListener {

    private TextView Nombre,Apellido,Correo;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_registro);
        //Seteamos las Cajas de Texto
        Nombre = (TextView) findViewById(R.id.txtNombre);
        Apellido = (TextView) findViewById(R.id.txtApellido);
        Correo = (TextView) findViewById(R.id.txtCorreo);
        //Ponemos en Modo de Escucha al Boton
        findViewById(R.id.btnGenerar).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {

    }
}

I want to randomly select names from the XML arrays and display them in a text view.

@CzarMatt E created 2 XML one named 'Name' and another 'Surname' I want that by means of a RANDOM, the GENERAR button I autocomplete the text boxes, which are shown in the image — Ivan More Flores
– Ivan More Flores, Commented Jul 14, 2017 at 15:28

aneurinc · Accepted Answer · 2017-07-14 16:54:59Z

7

Put your names in a string array:

<resources>
    <string-array name="nomes">
        <item>Ivan</item>
        ...
    </string-array>
    ...
</resources>

Then use Random to get a random name from the array:

private String[] names;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ...
    names = getResources().getStringArray(R.array.nomes);
}

@Override
public void onClick(View v) {
    int randomIndex = new Random().nextInt(names.length);
    String randomName = names[randomIndex];
    yourTextView.setText(randomName);
}

edited Jul 14, 2017 at 16:54

answered Jul 14, 2017 at 15:37

aneurinc

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6 Comments

Ivan More Flores Over a year ago

Hi, thanks, but I'm new to ANDROID and I do not know where to put the code. You can put it next to my code, please

Ivan More Flores Over a year ago

Zorry and how do I put it in my text box?

Ivan More Flores Over a year ago

My god, I get error: c Unfortunately, youApp has stopped

aneurinc Over a year ago

What error did you get? To display text in a TextView use setText(). E.g. Nombre.setText(randomName)

Ivan More Flores Over a year ago

Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference

|

Roman Badillo G · Accepted Answer · 2017-07-14 15:36:45Z

0

You can try something like this:

String[] array = context.getResources().getStringArray(R.array.your_array);
String randomString = array[new Random().nextInt(array.length)];

Hope this helps

answered Jul 14, 2017 at 15:36

Roman Badillo G

451 silver badge8 bronze badges

1 Comment

Ivan More Flores Over a year ago

Hi, thanks, but I'm new to ANDROID and I do not know where to put the code. You can put it next to my code, please

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