Android Spinner specific list

Question

So I've been trying my best and getting this Spinner to be able to change the list depending on the choices done. For example changing the say a Spinner devoted to floors, would yield a different set of spots when pressing the spot spinner:

XML format:

<ScrollView
    android:id="@+id/scrollView1"
    android:layout_width="202dp"
    android:layout_height="0dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_weight="0.49" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:text="New Reservation"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="First Name"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <EditText
            android:id="@+id/Fname"
            android:layout_width="129dp"
            android:layout_height="wrap_content"
            android:ems="10"
            android:inputType="textPersonName" >

            <requestFocus />
        </EditText>

        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Last Name"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <EditText
            android:id="@+id/Lname"
            android:layout_width="126dp"
            android:layout_height="wrap_content"
            android:ems="10"
            android:inputType="textPersonName" />

        <TextView
            android:id="@+id/textView4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="License"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <EditText
            android:id="@+id/License"
            android:layout_width="126dp"
            android:layout_height="wrap_content"
            android:ems="10"
            android:inputType="number" />

        <Spinner
            android:id="@+id/Garage"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:entries="@array/Garages"
            android:prompt="@string/GaragePrompt" />

        <Spinner
            android:id="@+id/Floor"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:entries="@array/Floors"
            android:prompt="@string/FloorPrompt" />

        <Spinner
            android:id="@+id/Spot"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:entries="@array/Spots"
            android:prompt="@string/SpotPrompt" />

        <TextView
            android:id="@+id/textView5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Date"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <EditText
            android:id="@+id/Date"
            android:layout_width="122dp"
            android:layout_height="wrap_content"
            android:inputType="date" />

        <TextView
            android:id="@+id/textView6"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Time"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <EditText
            android:id="@+id/Time"
            android:layout_width="122dp"
            android:layout_height="wrap_content"
            android:inputType="time" />

         <Button
             android:id="@+id/Reserve"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginLeft="21dp"
             android:text="Reserve" />

    </LinearLayout>
</ScrollView>

Thank you for the help.

Answer 1

The following is one way of populating different values on a Spinner depending on the selection of another Spinner.

In the following case the Spots will change values with the selection of the Floor spinner. This is one way of doing it but might not be the best way...

Declare as class variables...

private Spinner floor, spot;
private ArrayAdapter<String> floorAdapter, spotAdapter;

In onCreate

floor = (Spinner) findViewById(R.id.Floor);
spot = (Spinner) findViewById(R.id.Spot);

// NOTE: 
// You can populate the lists below from a resource array as well using ArrayAdapter.createFromResource.

List<String> floor = new ArrayList<String>();
floor.add("spot 1");
floor.add("spot 2");

List<String> spot1 = new ArrayList<String>();
spot1.add("spot1 item 1");
spot1.add("spot1 item 2");
spot1.add("spot1 item 3");

List<String> spot2 = new ArrayList<String>();
spot2.add("spot2 item 1");
spot2.add("spot2 item 2");
spot2.add("spot2 item 3");

floorAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, floor);
floor.setAdapter(floorAdapter);
floor.setOnItemSelectedListener(this);

Then do the following on the onItemSelected for the floor spinner...

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    switch(position) {
    case 0:
        spotAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spot1);
        spot.setAdapter(spotAdapter);
        break;
    case 1:
        spotAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spot2);
        spot.setAdapter(spotAdapter);
        break;
    default:
        break;
}

As I mentioned above, you can load the list from an array as well using ArrayAdapter.createFromResource.

All the best.