1 /*
2  * Copyright (C) 2014 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 android.sample;
18 
19 import android.app.Activity;
20 import android.content.Context;
21 import android.content.SharedPreferences;
22 import android.content.SharedPreferences.Editor;
23 import android.os.Bundle;
24 
25 import java.lang.Override;
26 
27 /**
28  * A simple activity for using the SharedPreferences API.
29  */
30 public class SampleDeviceActivity extends Activity {
31 
32     private SharedPreferences mPreferences;
33 
34     @Override
onCreate(Bundle icicle)35     public void onCreate(Bundle icicle) {
36         super.onCreate(icicle);
37         // Get a reference to this context's shared preference.
38         mPreferences = getPreferences(Context.MODE_PRIVATE);
39     }
40 
41     /**
42      * Saves the given key value pair to the shared preferences.
43      *
44      * @param key
45      * @param value
46      */
savePreference(String key, String value)47     public void savePreference(String key, String value) {
48         // Get an editor to modify the preferences.
49         Editor editor = mPreferences.edit();
50         // Insert the key value pair.
51         editor.putString(key, value);
52         // Commit the changes - important.
53         editor.commit();
54     }
55 
56     /**
57      * Looks up the given key in the shared preferences.
58      *
59      * @param key
60      * @return
61      */
getPreference(String key)62     public String getPreference(String key) {
63         return mPreferences.getString(key, null);
64     }
65 
66     /**
67      * Deletes all entries in the shared preferences.
68      */
clearPreferences()69     public void clearPreferences() {
70         // Get an editor to modify the preferences.
71         Editor editor = mPreferences.edit();
72         // Delete all entries.
73         editor.clear();
74         // Commit the changes - important.
75         editor.commit();
76     }
77 
78 }
79