String List View Example

This example shows how to use an adapter to display a list of strings in a ListView. An alternative form of this example that uses arrays instead of lists can be found in the Examples/ListView directory.

A screenshot of the application.

We import the classes and modules referred to by our classes.

from java.lang import Object, String
from import Activity
import android.os
from android.view import View, ViewGroup
from android.widget import Adapter, BaseAdapter, ListView, TextView

We also import an adapter class that will let us expose lists of strings to views.

from serpentine.adapters import StringListAdapter

The StringListViewActivity is derived from the standard Activity class and represents the application. Android will create an instance of this class when the user runs it.

class StringListViewActivity(Activity):

    s = ("This example shows how to expose an array of strings to a list view "
         "via an adapter, creating text views for each of the strings.")

We define a constant string that an instance of this class can access at run-time. The contents of the string will be used to populate an array.

The initialisation method simply calls the corresponding method in the base class.

    def __init__(self):

The onCreate method is where we set up the user interface after calling the base class's onCreate method.

    @args(void, [android.os.Bundle])
    def onCreate(self, bundle):
        Activity.onCreate(self, bundle)

We split the string defined above to obtain an array of strings which we add to a list of strings for use in an adapter.

        stringlist = []
        for s in self.s.split(" "):

Finally, we create an adapter to wrap the string list and a list view to use with it. We make the list view the main view in the activity.

        adapter = StringListAdapter(stringlist)
        view = ListView(self)