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      1 /*
      2  * Copyright (C) 2016 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.supportpreference;
     18 
     19 import android.os.Bundle;
     20 import android.support.v4.app.Fragment;
     21 import android.support.v7.app.AppCompatActivity;
     22 import android.support.v7.preference.PreferenceFragmentCompat;
     23 import android.support.v7.preference.PreferenceScreen;
     24 
     25 /**
     26  * Demonstration of PreferenceFragment, showing a single fragment in an
     27  * activity.
     28  */
     29 public class FragmentSupportPreferencesCompat extends AppCompatActivity
     30         implements PreferenceFragmentCompat.OnPreferenceStartScreenCallback {
     31 
     32     @Override
     33     protected void onCreate(Bundle savedInstanceState) {
     34         super.onCreate(savedInstanceState);
     35 
     36         // Display the fragment as the main content.
     37         if (savedInstanceState == null) {
     38             getSupportFragmentManager().beginTransaction().replace(android.R.id.content,
     39                     new PrefsFragment()).commit();
     40         }
     41     }
     42 
     43     @Override
     44     public boolean onPreferenceStartScreen(PreferenceFragmentCompat caller, PreferenceScreen pref) {
     45         final Fragment f = new PrefsFragment();
     46         final Bundle args = new Bundle(1);
     47         args.putString(PreferenceFragmentCompat.ARG_PREFERENCE_ROOT, pref.getKey());
     48         f.setArguments(args);
     49         getSupportFragmentManager().beginTransaction()
     50                 .replace(android.R.id.content, f)
     51                 .addToBackStack(null)
     52                 .commit();
     53         return true;
     54     }
     55 
     56     //BEGIN_INCLUDE(support_fragment_compat)
     57     public static class PrefsFragment extends PreferenceFragmentCompat {
     58 
     59         @Override
     60         public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
     61             // Load the preferences from an XML resource
     62             setPreferencesFromResource(R.xml.preferences, rootKey);
     63         }
     64     }
     65 //END_INCLUDE(support_fragment_compat)
     66 }
     67