关于android源码之launcher解决思路

关于android源码之launcher
有谁研究过android源码里面的launcher?
帮忙一下checkForLocaleChange（）这个方法是干吗用的？有人知道吗

------解决方案--------------------
检测区域设置是否改变吧
------解决方案--------------------
应该是读本地化设置，如果改变跟之前的不同，就把新的配置写回到配置文件：
 243 private void checkForLocaleChange() {
 244 final LocaleConfiguration localeConfiguration = new LocaleConfiguration();
 245 readConfiguration(this, localeConfiguration);
 246 
 247 final Configuration configuration = getResources().getConfiguration();
 248 
 249 final String previousLocale = localeConfiguration.locale;
 250 final String locale = configuration.locale.toString();
 251 
 252 final int previousMcc = localeConfiguration.mcc;
 253 final int mcc = configuration.mcc;
 254 
 255 final int previousMnc = localeConfiguration.mnc;
 256 final int mnc = configuration.mnc;
 257 
 258 mLocaleChanged = !locale.equals(previousLocale) || mcc != previousMcc || mnc != previousMnc;
 259 
 260 if (mLocaleChanged) {
 261 localeConfiguration.locale = locale;
 262 localeConfiguration.mcc = mcc;
 263 localeConfiguration.mnc = mnc;
 264 
 265 writeConfiguration(this, localeConfiguration);
 266 }
 267 }