1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.example.android.apis.preference;
18
19import com.example.android.apis.R;
20
21import android.content.Context;
22import android.content.SharedPreferences;
23import android.os.Bundle;
24import android.preference.PreferenceActivity;
25import android.preference.PreferenceManager;
26
27/**
28 * This activity is an example of a simple settings screen that has default
29 * values.
30 * <p>
31 * In order for the default values to be populated into the
32 * {@link SharedPreferences} (from the preferences XML file), the client must
33 * call
34 * {@link PreferenceManager#setDefaultValues(android.content.Context, int, boolean)}.
35 * <p>
36 * This should be called early, typically when the application is first created.
37 * An easy way to do this is to have a common function for retrieving the
38 * SharedPreferences that takes care of calling it.
39 */
40public class DefaultValues extends PreferenceActivity {
41    // This is the global (to the .apk) name under which we store these
42    // preferences.  We want this to be unique from other preferences so that
43    // we do not have unexpected name conflicts, and the framework can correctly
44    // determine whether these preferences' defaults have already been written.
45    static final String PREFS_NAME = "defaults";
46
47    @Override
48    protected void onCreate(Bundle savedInstanceState) {
49        super.onCreate(savedInstanceState);
50
51        getPrefs(this);
52        getPreferenceManager().setSharedPreferencesName(PREFS_NAME);
53        addPreferencesFromResource(R.xml.default_values);
54    }
55
56    static SharedPreferences getPrefs(Context context) {
57        PreferenceManager.setDefaultValues(context, PREFS_NAME, MODE_PRIVATE,
58                R.xml.default_values, false);
59        return context.getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
60    }
61}
62