奇怪＆QUOT;接收未注册＆QUOT;例外 [英] Weird "Receiver not registered" exception

问题描述

在onResume（）我做的：

In onResume() I do:

registerReceiver(timeTickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

和中的onPause（）：

and in onPause():

unregisterReceiver(timeTickReceiver);

我看java.lang.IllegalArgumentException：如果接收器未注册，在Android开发者控制台报告（只有2个报告，我的应用程序有成千上万的用户）。唯一的例外是由unregisterReceiver触发（）。有什么可以发生？我不觉得很自信，只是围绕着它的try-catch。

I see "java.lang.IllegalArgumentException: Receiver not registered" reports in Android Developer Console (there are only 2 reports and my app has thousands of users). The exception is triggered by unregisterReceiver(). What can be happening? I don't feel very confident to just surround it with try-catch.

推荐答案

在特定屏幕上做，当一个preSS，然后马上做两方向的变化（如打开设备倒挂，我们已经看到了这个错误）。

We've seen this error when doing a long press on a particular screen, and then immediately doing two orientation changes (e.g. turning the device upside down).

API文档的<一个href="http://developer.android.com/reference/android/content/Context.html#unregisterReceiver%28android.content.BroadcastReceiver%29">unregisterReceiver说：

注销pviously注册的BroadcastReceiver一个$ P $。

Unregister a previously registered BroadcastReceiver.

它并没有明确说，但正如你所看到的，你打抛出：IllegalArgumentException：接收未注册如果尚未注册

It doesn't say explicitly, but as you've seen, you hit IllegalArgumentException: Receiver not registered if it isn't already registered.

我正在使用的解决方法是保存我的接收机作为成员字段，并将其设置为空时，它没有被注册，即我初始化为null，然后只设置它，当我注册。这可能不是完美的，但它确实解决了我崩溃！

The workaround I'm using is to store my Receiver as a member field, and have it set to null whenever it is not registered, i.e. I initialize it to null, and then only set it when I register it. This might not be perfect, but it does solve my crashes!

private Receiver mReceiver = null;

这是我onServiceConnected：

From my onServiceConnected:

sLog.debug("Registering receiver");
mReceiver = new Receiver();
registerReceiver(mReceiver, filter);

这是我onServiceDisconnected：

From my onServiceDisconnected:

if (mReceiver == null)
{
  sLog.info("Do not unregister receiver as it was never registered");
}
else
{
  sLog.debug("Unregister receiver");
  unregisterReceiver(mReceiver);
  mReceiver = null;
}

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