1 /*
2  * Copyright (C) 2011 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.android.customlocale2;
18 
19 import android.app.Activity;
20 import android.content.BroadcastReceiver;
21 import android.content.Context;
22 import android.content.Intent;
23 import android.util.Log;
24 
25 //-----------------------------------------------
26 
27 /**
28  * Broadcast receiver that can change the system's locale.
29  * <p/>
30  * This allows an external script such as an automated testing framework
31  * to easily trigger a locale change on an emulator as such:
32  * <pre>
33  * $ adb shell am broadcast -a com.android.intent.action.SET_LOCALE \
34  *                          --es com.android.intent.extra.LOCALE en_US
35  * </pre>
36  */
37 public class CustomLocaleReceiver extends BroadcastReceiver {
38 
39     private static final String TAG = CustomLocaleReceiver.class.getSimpleName();
40     private static final boolean DEBUG = true;
41 
42     /** Intent action that triggers this receiver. */
43     public static final String ACTION_SET_LOCALE = "com.android.intent.action.SET_LOCALE";
44     /** An extra String that specifies the locale to set, in the form "en_US". */
45     public static final String EXTRA_LOCALE = "com.android.intent.extra.LOCALE";
46 
47     @Override
onReceive(Context context, Intent intent)48     public void onReceive(Context context, Intent intent) {
49         setResult(Activity.RESULT_CANCELED, null, null);
50         if (intent == null || ! ACTION_SET_LOCALE.equals(intent.getAction())) {
51             if (DEBUG) {
52                 Log.d(TAG, "Invalid intent: " + (intent == null ? "null" : intent.toString()));
53             }
54             return;
55         }
56 
57         String locale = intent.getStringExtra(EXTRA_LOCALE);
58 
59         // Enforce the locale string is either in the form "ab" or "ab_cd"
60         boolean is_ok = locale != null;
61         is_ok = is_ok && (locale.length() == 2 || locale.length() == 5);
62         if (is_ok && locale.length() >= 2) {
63             is_ok = Character.isLetter(locale.charAt(0)) &&
64                     Character.isLetter(locale.charAt(1));
65         }
66         if (is_ok && locale.length() == 5) {
67             is_ok = locale.charAt(2) == '_' &&
68                     Character.isLetter(locale.charAt(3)) &&
69                     Character.isLetter(locale.charAt(4));
70         }
71 
72         if (!is_ok && DEBUG) {
73             Log.e(TAG, "Invalid locale: expected ab_CD but got " + locale);
74         } else if (is_ok) {
75             ChangeLocale.changeSystemLocale(locale);
76             setResult(Activity.RESULT_OK, locale, null);
77         }
78     }
79 
80 }
81 
82 
83