我检查了答案，只是在检查我的日志时偶然发现我的错误。 确保右边的方框显示“只显示选定的应用程序”。我的显示的是“Firebase”，所以它显示了来自Firebase的消息。

我刚把它修好了。在DDMS显示的最右边寻找恢复Devices Logcat视图和ADB视图的小图标。

When the DDMS first came up with both the "ADB Logs" and the "Devices | logcat" tab showing. The "Devices | logcat" is the one that should be showing the device output, but was blank. Somehow I managed to hide one or the other of those tabs, I forget exactly how. But, off to the right there was a tiny icon that said "Restore ADB" view, and I clicked it and it came up. Then there was another tiny icon that said "Restore Devices logcat view". I clicked that, and all of a sudden it appeared and was showing the device output again.

确保在模拟器开发人员菜单选项中有记录器缓冲区大小适当值。

我刚刚更改了applictionId和logcat停止工作。要重置它，您必须更改包的名称。只需点击右上角的下拉在Logcat窗口，显示你的应用程序包的名称，点击它，然后点击编辑过滤器配置，现在改变包的名称。它将开始工作。

重新启动logcat总是对我有帮助。

我尝试了上面的建议。然而，没有一个成功。然后我做了下面的事情，结果出乎意料地奏效了:

断开设备的USB接口 使用adb tcpip 5555和adb connect <device ip>命令通过Wi-Fi连接设备 使用adb kill-server断开设备与adb的连接 通过USB重新连接设备

然后LogCat显示日志。尽管在第2步时日志可用，但以下步骤在通过USB连接时为我解决了这个问题。