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 17 package com.example.android.apis.preference; 18 19 import com.example.android.apis.R; 20 21 import android.content.Context; 22 import android.content.SharedPreferences; 23 import android.os.Bundle; 24 import android.preference.PreferenceActivity; 25 import 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 */ 40 public 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 onCreate(Bundle savedInstanceState)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 getPrefs(Context context)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