Android:是否导出了上下文注册的广播接收器？

Question

如果我像这样在我的 Activity 中注册一个广播接收器，

@Override
protected void onResume() {
    super.onResume();

    myReceiver = new BroadcastReceiver() { ... };
    IntentFilter filter = new IntentFilter("com.example.MY_ACTION");
    registerReceiver(myReceiver, filter);
}

这个接收器是导出的吗？如果另一个应用程序广播 com.example.MY_ACTION，它会被 myReceiver 接收吗？

如果是，我假设我需要使用接受字符串权限的 registerReceiver() 形式，然后在我的 list 中定义该权限，给它一个高保护级别(例如签名)。那是对的吗？有没有更简单的方法？

Answer 1

来自 BroadcastReceiver API 的 api 文档:

If you don't need to send broadcasts across applications, consider using this class with LocalBroadcastManager instead of the more general facilities described below. This will give you a much more efficient implementation (no cross-process communication needed) and allow you to avoid thinking about any security issues related to other applications being able to receive or send your broadcasts.

这样至少您可以将接收器仅保留在您的应用程序中。