pamons12 / csci490-lab_3

Creating a ListView and using ArrayAdapter

CSCI490-Lab_3

Android provides the ListView class (amoung others) which are capable of displaying a scrollable list of items. This can be a complex topic, so we will cover the basics and you will introduced to deeper concepts as the semester progresses.

Problem

This lab will have you creating a listview that will contain your classes you have taken over the last two semesters. Have at least five classes to list, even if you have to fake it.

Purpose

This lab will introduce some basic features of the ArrayAdapter and the ListView.

Steps

Create Views:

• Open Android Studio and create a basic project. Name the project whatever you like, ListViewDemo is a good candidate. Choose Your API of choice, but should be at least API 23: Android 6.0 (Marshmallow). Next choose just an Empty Activity.
• In the activity_main.xml, replace the default TextView with

    <ListView
        android:id="@+id/class_schedule"
        android:layout_height="match_parent"
        android:layout_width="match_parent">
    </ListView> 

• Create a Java reference in MainActivity.java.
• Create a String Array with your classes over the last few semesters. Have at least five classes.
• Create an ArrayAdapter with the Application Context, the Android provided android.R.layout.simple_list_item_1, and the array.
• Have your ListView object set an adapter with the ArrayAdapter you created in the last step.
• Run your application and test.

Add Click Listeners:

• ListView affords you the option to apply listeners to each item in the list.
• On your ListView object, set a OnItemClickListener and a OnItemLongClickListener. Create a different Toast message for each. NOTE: If you return false on the LongClickListener, it will all for other Listeners. Test your Click Listeners and observe how the regular click is automatically called after the long click.
• Change the LongClickListener to return true and test again. Observe how the regular click no longer is called.

Style the ListView

• Add the following lines to the ListView in activity_main.xml:

<ListView
    ...
    android:dividerHeight="5.0sp"
    android:divider="@android:color/black"
    android:padding="45sp">
</ListView>

• Test your code one final time.
• Share, commit, and push lab to your GitHub account