mReceiver = new BroadcastReceiver() {
//add by mengmeng.chen begin
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(Intent.ACTION_MEDIA_MOUNTED)) {
loadDir((String)mPath.getText());
}else if (action.equals(Intent.ACTION_MEDIA_UNMOUNTED) || action.equals(Intent.ACTION_MEDIA_BAD_REMOVAL)||action.equals(Intent.ACTION_MEDIA_EJECT)) {
loadDir(FileUtils.ROOTPATH);
}
}
};
filter = new IntentFilter();
filter.addAction(Intent.ACTION_MEDIA_MOUNTED);
filter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);
filter.addAction(Intent.ACTION_MEDIA_EJECT);
filter.addAction(Intent.ACTION_MEDIA_BAD_REMOVAL);
filter.addDataScheme("file");
registerReceiver(mReceiver, filter);// registerReceiver(BroadcastReceiver receiver, IntentFilter filter) ，第一个参数是我们要处理广播的 BroadcastReceiver （广播接收者，可以是系统的，也可以是自定义的）；第二个参数是意图过滤器。
}