Android广播接收器注册问题：Caused by: java.lang.IllegalArgumentException: Receiver not registered

1、程序中明明使用如下方法进行了广播的注册和解除注册：

mContext.registerReceiver(downloadReceiver, filter);
mContext.unregisterReceiver(downloadReceiver);

但程序运行过程中还是有一下问题：

android.app.IntentReceiverLeaked: Activity *********** has leaked IntentReceiver *********** that was originally registered here. Are you missing a call to unregisterReceiver()?

并出现报错：

Caused by: java.lang.IllegalArgumentException: Receiver not registered: ***************

后来改成下面方法就可以了：

mContext.getApplicationContext().registerReceiver(downloadReceiver, filter);
mContext.getApplicationContext().unregisterReceiver(downloadReceiver);

文章来自：http://blog.csdn.net/heqiangflytosky/article/details/42527561