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      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
     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