Android Programming Tutorials

What's Your Preference?

This sets up a single-item PreferenceScreen. Note that it references two

string arrays, one for the display labels of the sort-order selection list, and

one for the values actually stored in the SharedPreferences.

So, to define those string arrays, add a LunchList/res/values/arrays.xml file

with the following content:

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

<resources>

<string-array name="sort_names">

<item>By Name, Ascending</item>

<item>By Name, Descending</item>

<item>By Type</item>

<item>By Address, Ascending</item>

<item>By Address, Descending</item>

</string-array>

<string-array name="sort_clauses">

<item>name ASC</item>

<item>name DESC</item>

<item>type, name ASC</item>

<item>address ASC</item>

<item>address DESC</item>

</string-array>

</resources>

Note we are saying that the value stored in the SharedPreferences will

actually be an ORDER BY clause for use in our SQL query. This is a convenient

trick, though it does tend to make the system a bit more fragile – if we

change our column names, we might have to change our preferences to

match and deal with older invalid preference values.

Step #2: Create the Preference Activity.............................................

Next, we need to create a PreferenceActivity that will actually use these

preferences. To do this, add a PreferenceActivity implementation, stored as

LunchList/src/apt/tutorial/EditPreferences.java:

package apt.tutorial;

import android.app.Activity;

import android.os.Bundle;

import android.preference.PreferenceActivity;

public class EditPreferences extends PreferenceActivity {

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