samples/ApiDemos/src/com/example/android/apis/preference/PreferenceWithHeaders.java

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.preference;

import com.example.android.apis.R;

import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;
import android.util.Log;
import android.widget.Button;

import java.util.List;

/**
 * Demonstration of PreferenceActivity to make a top-level preference
 * panel with headers.
 */
//BEGIN_INCLUDE(activity)
public class PreferenceWithHeaders extends PreferenceActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // Add a button to the header list.
        if (hasHeaders()) {
            Button button = new Button(this);
            button.setText("Some action");
            setListFooter(button);
        }
    }
    
    /**
     * Populate the activity with the top-level headers.
     */
    @Override
    public void onBuildHeaders(List<Header> target) {
        loadHeadersFromResource(R.xml.preference_headers, target);
    }

    /**
     * This fragment shows the preferences for the first header.
     */
    public static class Prefs1Fragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            // Load the preferences from an XML resource
            addPreferencesFromResource(R.xml.fragmented_preferences);
        }
    }

    /**
     * This fragment contains a second-level set of preference that you
     * can get to by tapping an item in the first preferences fragment.
     */
    public static class Prefs1FragmentInner extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            // Can retrieve arguments from preference XML.
            Log.i("args", "Arguments: " + getArguments());
            
            // Load the preferences from an XML resource
            addPreferencesFromResource(R.xml.fragmented_preferences_inner);
        }
    }

    /**
     * This fragment shows the preferences for the second header.
     */
    public static class Prefs2Fragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            // Can retrieve arguments from headers XML.
            Log.i("args", "Arguments: " + getArguments());
            
            // Load the preferences from an XML resource
            addPreferencesFromResource(R.xml.preference_dependencies);
        }
    }
}
//END_INCLUDE(activity)