Spinner Android Example
Spinner control is sometimes
confused with the circular progress bar in
Android. Sometimes when it is asked to the fresher about spinner, they
generally answer it wrong. Note that Spinner is just like a DropDown. This
control is used when we have a lot of entries available but we want user to
select only one among them. So here we will try to implement the Spinner into
our Android project. Follow these Steps:
Step 1:
Drag and drop the Spinner Control
from the “Form widgets” provided in the palette or just copy and paste the
following code into .xml file.
<Spinner
android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="61dp"
/>
|
Step 2:
To add
items into spinner, Go to res/values/string.xml and add the following code into
your string.xml file.
<!-- for
spinner -->
<string-array name="choice">
<item >jellybean</item>
<item >Gigerbread</item>
<item >laddu</item>
</string-array>
|
Step 3:
Now go
to Graphical layout of activity_main.xml
·
Right click on spinner
·
Select Edit enteries
·
From array, select choice (Name given to
string-array in string.xml file)
·
Click OK.
OR
Just add the following code into
<string> tag
android:entries="@array/choice"
Step 4:
Your spinner has now all those items which are added by you
in the <string-array>.
Adding Functionality to Spinner
Now if you want to know that which item has been selected by
the user then you have to work on .java file. Follow these steps;
·
Create the
object of Spinner class i.e
Spinner sp;
|
·
Initialize
the object inside oncreate method i.e
sp=(Spinner)findViewById(R.id.spinner1);
|
·
Add SetonselectedItemListener
sp.setOnItemSelectedListener(new
AdapterView.OnItemSelectedListener() {
@Override
public void
onItemSelected(AdapterView<?> arg0, View v,
int i, long l) {
// TODO Auto-generated
method stub
// to get the
value of selected item
String
str=((TextView)v).getText().toString();
//Display msg
Toast.makeText(getApplicationContext(),str
, 0).show();
}
@Override
public void
onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated
method stub
}
});
|
·
Run your
project on your device or virtual device.
This post was written by: Deepak Anand
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