广播接收者BroadcastReceiver启动Activity需要加FLAG_ACTIVITY_NEW_TASK
BroadcastReceiver启动Activity需要加FLAG_ACTIVITY_NEW_TASKBroadcastReceiver->onReceive的时候传进来的context是ReceiverRestrictedContext,然而ReceiverRestrictedContext的代码很简单,里面没有startActivity方法,而ReceiverRestrictedContex