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Asked: 2020-06-10 21:01:21 +0800 CST 2020-06-10 21:01:21 +0800 CST

Can value be used in a string-array to assign a different identifier to each item in an Android spinner?

  • 772

It happens that I have one Spinnerthat has 4 names:

   <string-array name="Nombres">
        <item>Seleccione</item>
        <item>Juan</item>
        <item>Pedro</item>
        <item>Carlos</item>
        <item>Jose</item>
    </string-array>

I want to save them in a MySQL database, but the field to save is of type int, since it is my foreign key to relate that table to another. In HTML I usually do it like this:

   <select class="nombre" name="nombre">
      <option>Seleccione</option>
      <option value="1">Juan</option>
      <option value="2">Pedro</option>
      <option value="3">Carlos</option>
      <option value="3">Jose</option>
   </select>

My question is can this be done on Android?:

   <string-array name="Nombres">
        <item>Seleccione</item>
        <item value="1">Juan</item>
        <item value="2">Pedro</item>
        <item value="3">Carlos</item>
        <item value="4">Jose</item>
    </string-array>

I haven't found a similar example, that's why I'm asking.

Right now, I'm doing it like this:

Spinner spinner_nombres = (Spinner)findViewById(R.id.sp_nombre);

ArrayAdapter adapter_d = ArrayAdapter.createFromResource(this, R.array.Nombres, R.layout.spiner_item);
spinner_nombres.setAdapter(adapter_d);

String selec = spinner_nombres.getSelectedItem().toString();
        int id_nombre = 0;
        if (selec.equals("Juan")) {
            id_nombre = 1;
        } else
        if (selec.equals("Pedro")) {
            id_nombre = 2;
        }
        else
        if (selec.equals("Carlos")) {
            id_nombre = 3;
        }
        else
        if (selec.equals("Jose")) {
            id_nombre = 4;
        }

And so I send it to PHP:

nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("idnombre",Integer.toString(id_nombre).trim()));

The detail is that I am using 14 Spinnersin my application and so much code is starting to drive me crazy, so I would really appreciate it if someone could help me.

android

2 Answers

  1. Best Answer

    If you are going to load the data into the Adapter in this way, it is not possible.

    ArrayAdapter adapter_d = ArrayAdapter.createFromResource(this, R.array.Nombres, R.layout.spiner_item);

    The option would be to create two string-arrayinside styles.xml, one for the names :

      <string-array name="nombres">
        <item>Seleccione</item>
        <item>Juan</item>
        <item>Pedro</item>
        <item>Carlos</item>
        <item>Jose</item>
    </string-array>

    and another for the values:

      <string-array name="val_nombres">
        <item>0</item>
        <item>1</item>
        <item>2</item>
        <item>3</item>
        <item>4</item>
    </string-array>

    In the Adapter you load the names.

    ArrayAdapter adapter_d = ArrayAdapter.createFromResource(this, R.array.nombres, R.layout.spiner_item);

    to obtain the value of some name you do it through the position:

    Spinner spinner = (Spinner) findViewById(R.id.my_spinner);
int spinner_posicion = spinner.getSelectedItemPosition();
String[] valores_nombre = getResources().getStringArray(R.array.val_nombres);
int valor_nombre = Integer.valueOf(valores_nombre[spinner_posicion]);

    You could use the values ​​of string-arraythe containing the attributes that contain the values, but you would have to implement your own parser .

      <string-array name="Nombres">
        <item>Seleccione</item>
        <item value="1">Juan</item>
        <item value="2">Pedro</item>
        <item value="3">Carlos</item>
        <item value="4">Jose</item>
    </string-array>

    It is actually much easier and better performing to do option two string-array.

    • 2

  2. There is no easy way to do it in an XML file. As an alternative, you can use a List<Pair<Integer, String>>filling it by code.

    The documentation for Pairit is here: https://developer.android.com/reference/android/util/Pair.html

    • 1