blocks|key|22198|text|在Logcat窗口中重新选择您设备，然后重新选择您的应用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22199|如果没有显示，请使用以下两个命令重新启动adb：|22200|adb+kill-server
adb+start-server|code-block|syntax|javascript|22201|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

In Logcat window reselect your device then reselect your app
if it didn't appear restart adb using two commands:
<pre><code>adb kill-server
adb start-server
</code></pre>

blocks|key|4529435|text|首先，我的问题是:我在用USB线连接的三星Galaxy+A3上测试一个应用程序。我收到了通常的logCat消息，包括过滤后的消息，然后logCat突然停止显示过滤后的消息。将其设置为Verbose将显示连续的消息流，并在logCat的左上角显示一条消息"too+much+to+display“。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529436|我尝试重新启动Android+Studio+(清除缓存和不清除缓存)，但是没有成功。然后我重启了我的手机，一切都恢复正常了。因此，连接的手机似乎是问题所在，向logCat发送了太多信息。|4529437|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

First, my problem: I was testing an app on a Samsung Galaxy A3 attached via usb cable. I was getting the usual logCat messages, including the filtered ones then all of a sudden the logCat stopped displaying filtered messages. Setting it to Verbose displayed a continues stream of messages with a message at the top left corner of the logCat stating &quot;too much output to display&quot;.
I tried restarting Android Studio (with and without clearing the cache) but no luck. I then rebooted my phone and everything was back to normal. So it appeared that the attached phone was the problem, sending too much info to the logCat.

blocks|key|4529646|text|在logcat的左上角有一个选择仿真器的选项。可能默认情况下没有选择当前的仿真器。尝试将其更改为当前仿真器，它将修复。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529647|📷|atomic|offset|length|4529648|​|4529649|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/fd47b41fbe631e84b4fa9074a795b7ac.png|imageAlt^0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@$E|T|F|U|1|V]]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P|Q|-4]]]]

on The top left of logcat there is an option to choose the emulator. may it's not selected the current emulator by default. try to changing it to current emulator and it will fix. 
<img src="https://i.stack.imgur.com/dnTLn.png" alt="image">

blocks|key|22149|text|我已经解决了这个问题，在Android+Studio+->偏好设置->调试器->+Android+Debug+Bridge+(adb)中启用了"Use+libusb+backend“选项。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22150|📷|atomic|offset|length|22151|​|22152|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/638eb30e24ca063a22740a10c6135dbf.jpeg|imageAlt^0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@$E|T|F|U|1|V]]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P|Q|-4]]]]

I have solved this issue by enabling "Use libusb backend" option in Android Studio -> Preferences -> Debugger -> Android Debug Bridge (adb).<a href="https://i.stack.imgur.com/PXnuk.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PXnuk.jpg" alt="enter image description here"></a>

blocks|key|4529819|text|重新启动模拟器和Android+Studio。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529820|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Restart both the emulator and Android Studio.

blocks|key|4529889|text|帮助重启设备(HTC)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529890|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

blocks|key|4529683|text|我通过将手机的USB选项从“仅充电”改为“传输文件(MTP)”修复了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529684|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I fixed the issue by changing the USB Options of my phone from "Charging only" to "Transfer files (MTP)"

blocks|key|4529487|text|我有这样的代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529488|+Log.e(getMyName(),message);|code-block|syntax|javascript|4529489|这样做的问题是，getter方法访问的变量为空。Android+Studio没有给我任何关于它的错误！似乎这是在默默地不让Log.e语句工作。我查看了很多博客，但都找不到解决方案。这个小小的失误浪费了我整整一个小时。希望这对某些人有帮助。|4529490|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I had this code:

<pre><code> Log.e(getMyName(),message);
</code></pre>

The problem with this was, the variable that the getter method was accessing was null. Android Studio did not give me any error about it! Seems this was silently not letting the Log.e statement to work. I checked many blogs but couldn't find the solution. This small miss wasted my complete one hour. Hope this helps someone.

blocks|key|4529552|text|检查您在logcat搜索中没有返回任何匹配的内容，例如不存在的包名。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529553|我已经重命名了我的包，但在logcat搜索字段中留下了一个旧名称。|4529554|结果:看不到logcat输出|4529555|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Check you don't have something in the logcat search that returns no matches, for example a non existent package name.
I had renamed my packages, but left an old name in the logcat search field.
Result: No logcat output visible

blocks|key|4529588|text|我试着在我的设备设置中将“扩展日志”从“选择性”切换到“允许”，这很有帮助。现在，调试信息出现在LogCat中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529589|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I tried to switch "Extended log" in my device settings from "Selectivly" to "Allowed" and it helped. Now debug info appears in LogCat.

blocks|key|22101|text|我有一种问题，让我的logcat工作的方式是我没有选择正确的过滤器。由于我使用的是SQLite+(数据库)，在过滤器中我选择了Firebase.so，这就是我的logcat无法工作的原因。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22102|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the kind of issue the way which got me the logcat to work was that I was not choosing the right filter. as I was using SQLite (Database) and in filters I had chosen Firebase.so that's why my logcat was not working.

blocks|key|4529837|text|清理和重建为我修复了它。显然，当我运行的时候，它实际上并不是在重建APK，只是运行已经制作好的APK。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529838|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Cleaning and then Rebuilding fixed it for me. Apparently when I ran, it wasn't actually rebuilding the APK, just running the one that had already been made.

blocks|key|4529900|text|在Android+Studio中重新安装(更改)+GitHub后出现此问题。当我将GitHub桌面(git.exe)连接到Android+Studio时，就发生了这种情况。就在那只罗克猫倒下之后。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529901|解决方案:提交%2B推送=固定logcat))|4529902|我不知道它是如何工作的，但这是事实。|4529903|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

This problem appeared after reinstalling (changing) GitHub in Android Studio.
it happened when I connected the GitHub Desktop (git.exe) to the Android Studio. And right after that logcat fell.

Solution: commit + push = fixed logcat))

I did not understand how it works, but it is a fact

blocks|key|22276|text|我也有同样的问题。我尝试终止并重新启动adb-server，但没有帮助。我在path中删除了应用的debug+apk：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22277|<your_app>/<your_app>_app/build/outputs/apk/debug/|code-block|syntax|javascript|22278|并再次运行该项目。它为我解决了这个问题。|22279|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I had the same problem. I tried killing and restarting the adb-server, but it didn't help. I deleted the debug apk of the app in the path:

<pre><code>&lt;your_app&gt;/&lt;your_app&gt;_app/build/outputs/apk/debug/
</code></pre>

And run the project again. It solved the problem for me.

blocks|key|4529972|text|如果你的应用程序崩溃了，有一个包含2个进程的下拉列表，你必须选择另一个死进程，这样你就可以看到错误消息：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4529973|​|4529974|📷|atomic|offset|length|4529975|4529976|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/3c7ef3652e170a350682d4f09c58ad9e.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

If your app has crashed, there is a dropdown that has 2 process, you have to select the other process that is dead, so you can see the error message:
<a href="https://i.stack.imgur.com/XxMGI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XxMGI.png" alt="enter image description here" /></a>

blocks|key|22374|text|在我的例子中，当选择No+Filters时，我看到|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|22375|logcat:+Unexpected+EOF!|code-block|syntax|javascript|22376|然后我通过以下方式修复它：|22377|adb+logcat+-G+100M|22378|请参阅Logcat+crashes+with+error:+unexpected+EOF|22379|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/48689930/logcat-crashes-with-error-unexpected-eof/48704727^0|A|A|0|0|0|0|3|15|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|D|@$9|15|A|16|1|17]]|E|$]]|$1|Q|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

In my case when select <code>No Filters</code>, I see
<pre><code>logcat: Unexpected EOF!
</code></pre>
then I fixed it by:
<pre><code>adb logcat -G 100M

</code></pre>
See <a href="https://stackoverflow.com/questions/48689930/logcat-crashes-with-error-unexpected-eof/48704727">Logcat crashes with error: unexpected EOF</a>

blocks|key|4530027|text|我尝试了所有的步骤和调试，只是为了发现我意外地在过滤器中键入了一个空格。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4530028|确保在Logcat+Windows中没有选择空格作为筛选器。|4530029|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I tried all steps and debugging just to find out that I had accidently typed a space in the filter.
Make sure that in your Logcat Windows a space is not chosen as a Filter.

There is very awkward thing I am facing. Logcat is shown in debugging application, but while running (not debugging) application, it is not showing Logcat.
I tried restarting it but nothing is happening.

Android Studio Logcat not showing logs

Android Studio

数据库

调试器

Android

Windows

SQLite

GitHub

我正面临着一件非常尴尬的事情。Logcat在调试应用程序中显示，但在运行(非调试)应用程序时，它不显示Logcat。我尝试重新启动它，但什么也没有发生。

问Android Studio Logcat不显示日志
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