Introducing the Preference Activity

The PreferenceActivity class is used to host the preference hierarchy defined using the preferences XML file. To create a new Preference Activity, extend the PreferenceActivity class as follows:

public class MyPreferenceActivity extends PreferenceActivity { }

To inflate the preferences, override the onCreate handler and call addPreferencesFromResource, as shown in the following snippet:

@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.preferences);

Like all Activities, the Preference Activity must be included in the application manifest:

<activity android:name=".MyPreferenceActivity"

android:label="My Preferences"> </activity>

This is all that's required for a simple Preference Activity implementation. To display the application settings hosted in this Activity, open it by calling startActivity or startActivityForResult:

Intent i = new Intent(this, MyPreferenceActivity.class); startActivityForResult(i, SHOW_PREFERENCES);

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