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Judul : Spinner View
link : Spinner View

Spinner View

 SPINNER VIEW Tutorial

Spinners are like drop down menu which provide a quick way to select one value from a set. In the default state, a spinner shows its currently selected value. Touching the spinner displays a dropdown menu with all other available values, from which the user can select a new one.You can add a spinner to your layout with the Spinner object. You should usually do so in your XML layout with a <Spinner> element.

1.Create  Android Project as per the details listed in the table

Property name	Property value
Project name	SRM_SpinnerViewTutorial
Package name	in.ac.srmuniv.spinnerviewtutorial
Activity name	MainActivity
Layout xml name	activity_main

2.Copy the code to activity_main.xml in res/layout folder 

<?xml version="1.0"encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

    <Spinner

        android:id="@+id/spinner1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:drawSelectorOnTop="true"/>       

</LinearLayout>
2.Copy the code in MainActivity.java Activity

package in.ac.srmuniv.spinnerviewtutorial;

importandroid.app.Activity;

import android.os.Bundle;

import android.view.View;

importandroid.widget.AdapterView;

importandroid.widget.ArrayAdapter;

importandroid.widget.Spinner;

importandroid.widget.Toast;

importandroid.widget.AdapterView.OnItemSelectedListener;

public  class MainActivity extends Activity

{

    String[] bond_films = {

            "Dr.No",

            "Man with Golden gun",

            "You only Live twice",

            "Live and Let die",

            "Thunderball",

            "License to Kill",

            "From Russia with Love",

            "Moonraker",

            "Octopussy",

            "A View to Kill",

            "On Her Majesty Service",

            "Golden Eye"

    };

    Spinner s1;

    @Override   

    public  void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        s1 = (Spinner) findViewById(R.id.spinner1);

        ArrayAdapter<String> adapter = new

                ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, bond_films);     

        s1.setAdapter(adapter);

        s1.setOnItemSelectedListener(newOnItemSelectedListener()    

        {

            public  void onItemSelected(AdapterView<?> arg0,View arg1, int arg2, long arg3)

            {

                int index = s1.getSelectedItemPosition();

                Toast.makeText(getBaseContext(),

                        "You have selected item : " + bond_films [index],Toast.LENGTH_SHORT).show();                       }

            public  void onNothingSelected(AdapterView<?> arg0){}

        });

    }

}
3.The AndroidManifest.xml file need not be modified.

4.Run the application on the Android emulator. Figure 1 shows the Spinner view in action.

Figure 1 Shows The Spinner view in action Figure 2 Shows selected item from Spinner list

CODE EXPLANATION

         The above program creates an ArrayAdapter object and associates it with the Spinner view.When an item in the Spinner view is selected, onItemSelectionListener interface  callback method onItemSelected() is called  Toast notification is used to display the item selected.Instead of displaying the items in the ArrayAdapter as a simple list, you can also display them using radio buttons. To do so, modify the second parameter in the constructor of the ArrayAdapter class:
  ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_multiple_choice,bond_films);    

                                            Figure 3: The Spinner view with multiple choice

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