Develop Reference

Android Studio Dolphin's Logcat stopped working for the filter?

With 'Android Studio Dolphin | 2021.3.1', I am trying to get logs for my application with the Classname (which is used as TAG for Logs) but nothing is showing up.
Sometimes, it doesn't show any logs with the filter package:mine or package:'my.package.name'.
Is this a known issue?
Update: reported on google's board : https://issuetracker.google.com/issues/258502193

I had the same problem (also using . I'm assuming it's related to the new Logcat tool window, so I just turned it off. The 'old' version is working for me. Maybe they'll fix it in the next update and I can try the new version.
File > Settings > Experimental > Logcat
then clear the checkbox for 'Enable new Logcat tool window'

One solution(time-consuming) which helped me is:
Close the current/all Logcat tab/s
Disconnect the device/emulator.
Restart IDE. (wait for some time if possible)
Start new Logcat windows.
Update:
The second solution is to turn off the experimental Logcat window:
Select Android Studio > Preferences
Go to the Experimental tab
Un-check the 'Enable new Logcat tool window' option.
Update (Nov,22):
The quick solution that worked for me:
Change your Log.d() statements to System.out.println(), and filter it with the keyword added in println() statements.

It seems to be a bug, there are two options, I prefer the second way cause it doesn't restart the whole IDE.
First solution:
Select the File menu > Invalidate Caches > Invalidate and Restart
Second solution:
Open the terminal from the bottom panel (tabs on the left corner).
Run these two commands:
adb kill-server
adb start-server

Android Studio Emulator Doesn't Open Seperate Window and It Doesn't See Emulator

When I start the emulator in Android Studio, it opens as a tab. I want to open it in a seperate window.
Additionally, my Visual Studio Code doesn't see this emulator.
Also, Android Studio, (and VSCode as well) doesn't see the emulator too. It isn't listed in select device.
I didn't use to have these kind of errors. I needed to delete Android Studio. I reinstalled it and things changed.

To resolve the issue, go to: File > settings > tools > emulator.
After that, untick "launch in a tool window" option.
Note:
Restart the program if you couldn't launch the emulator if instead you get a message that it's already launched.

With the new update it's possible to open the emulator as a new window clicking on settings icon -> view mode, there you can choose what's the best for you, maybe it can help.

Where is the logcat window in my Android Studio?

I am very new to the android studio, and I can not find the 'Logcat' window in my android studio? I can't find the window through the view option as well. Can anyone help me how to find it? Here is the screenshot of my android studio.

I think the building process was not complete. After all the building processes finished, the Logcat window showed automatically.

Try to build the app after Gradle sync then look at the bottom of the android studio logcat will be visible. if it's not visible then Try pressing Alt+6 on Windows or CMD+6 on Mac.

how to remove emulator from tool window android studio

for the new android version 4.1 or newer, we can run the emulator directly to the android studio tool window. it's good. so I add an emulator there, but I face some problems seeing this full screen of the emulator if I open logcat. so, now I want to remove the emulator from there. (i am unable to find out this setting, that where we remove this connection form directly show in android studio).
see this image,(it helps you to get my question proper)
again, in short, I want to remove the emulator tool window from my android studio. (i want to directly open this in the default way, where i will able to use emulator without showing inside of android studio)

go to File -> Setting -> tools -> Emulator and uncheck the checkbox (Launch in tool window) and apply changes. That's it. and restart your emulator

For Windows,
Step 1 :
File -> Setting -> Tools -> Emulator
Just uncheck the checkbox of "Launch in tool window" & click on Apply at right bottom & restart Emulator again.
For Mac OS,
Step 1 :
Android Studio -> Preference -> Tools -> Emulator
Just uncheck the checkbox of "Launch in tool window" & click on Apply at right bottom & restart Emulator again.
If still emulator is in Tool Window then first you need to stop running emulator in Tool Window.
For stop emulator,
Step 2
Open AVD Manager -> Choose down arrow of your selected emulator -> click on "Stop".
Just verify Step 1 before running your application again.
Now you have to run your application.

Step 1 : Android Studio -> Preference -> Tools -> Emulator Just uncheck the checkbox of "Launch in tool window" & click on Apply at right bottom & delete your emulator & create a new emulator

You only need to click on the x of your emulator window.
Emulator tool window

Go to Android Studio ->Preference->emulator->deselect Launch in a toolbar window
After applying change do invalidate and restart.

For those looking for a way to undock the emulator without changing the default setting (because I like it docked, most of the time)... right click on the emulators tab and see:

Android Studio not showing Logcat with Flutter

I'm using Android Studio for Flutter App Development. Everything seems to be working fine just that the Android Studio does not show the "logs" in Logcat. In the Logcat section, it says "Please Configure Android SDK". Which is already configured. And in the Logcat section says "No Connected Devices." in the drop-down menu. When it has recognized my Android Phone and is showing it just under the Menu bar.
Is there a fix for it? Is there something I am missing?

Try the following:
Event Log (a tab at the bottom right)
scroll to Android framework is detected
click Configure
The Logcat tab should appear now. Moreover, the Device File Explorer tab should show up on the right panel.

I just solved this, the flutter project was missing an Android module. Go to 'File -> Project Structure -> Modules'. Click on the '+' sign at the top to add a module. Select Android.

Update April 2020: Cuong's answer works better with Android Studio 3.6+
Previous answer:
Flutter use Run tab to display logs in Android Studio. Switch from Logcat to Run and then you will see logs.

Go to Setting/Preferences -> Languages & Framework -> Flutter ->
Check or uncheck Replace the Run and Debug console with an experimental Flutter Loggin view

Just open another NATIVE project for Android Studio in other window and the logcat will work, do it while Flutter project is open. That was the solution for me

Find a way around it (macOS).
Go to Project Structure -> Facets -> "+" -> Android -> Select Project.
Logcat should now be visible. Configure Android SDK if not done previously and you should be able to use Logcat.
Reference https://github.com/flutter/flutter-intellij/issues/2724

When I first came to Flutter from an Android background, I didn't know where to find the log statements. I didn't care so much about all of the system messages. I just wanted to see log messages from my app during development. This answer is for people like that, not for people who specifically need LogCat itself.
In Flutter apps you can log text using the print() statement.
print('hello');
As others have said, you can use the Run tab in Android Studio to view these logged comments.
Here is the code for main.dart:
import 'package:flutter/material.dart';
void main() {
runApp(MaterialApp(
home: Center(
child: RaisedButton(
child: Text('Button'),
onPressed: () {
print('hello'); // <-- logging
},
),
),
));
}

Open Project Stucture -> Modules -> new android module from exists source.
Logcat & Device File Explorer will be visible.
for Android Studio 3.6:
File -> New -> New Module -> Android Library

I had this issue:
I have done the following steps to resolved it:
Click the event log on the bottom right of android studio
Click on configure
Click on Ok in the dialog box
Logcat will be available now

I guess it's an ADB issue. You can restart AS (or maybe even your Computer) or what i usually do is open the terminal an then: adb kill-server && adb start-server (I think the second part adb start-server is not necessary because it seems that AS handles it automatically) - anyways this is how LogCat and Android (and Flutter) work for me every time.

1.Go to Menu and select 'Project Structure' -> 'Project'
2.In 'Project Structure' Select Project SDK
And just now click on OK and Apply.

Just use command 'flutter logs', then you can see all logs which are printed by 'print' or 'debugPrint' function.

When i face this problem I just go to File and open my existing native android project and then close it. This solution also works when abd Wifi pludings does show warning like => adb not found.

Run
adb logcat
and watch from terminal.
Doc: https://developer.android.com/studio/command-line/logcat

when you open flutter project, IDE prompts you to configure android project. Just click on the recommendation and it will start showing logcat window.

In case you accidentally refused to configure Android framework and now struggling to find the LogCat window. Then delete .idea, .dart_tool and .gradle folders in project root and android folder. Then Invalidate and restart. It will ask to configure detected Android framework. Click 'configure'.

In new versions of Android Studio, after deploying the app to device/emulator, in Run Tab you will see an option for flutter dev tools as shown in the image, it will open in browser (based on default chrome/edge) and there you can see logcat/logging
Flutter Dev Tools

Switch to the “Run” tab to see the logs and if you want to insert logs (like Log.d() in android), you can use print() function and whatever string you pass into it will be printed into the “Run” window.

I found a solution worked for me:
for MacOS:
Go to: /Users/userName/Library/Preferences/AndroidStudio3.4/options
Find "runner.layout.xml"
Change the name of this file for ex: runner01.layout.xml
Restart Android studio
for Windows:
1- Focus "Run" tab (click on tab header, not on its body)
2- Ctrl+Shift+A, find and click "Restore Layout"
References:
https://github.com/flutter/flutter/issues/25835
https://github.com/flutter/flutter-intellij/issues/3673#issuecomment-517356243
Hopefully, it helps.

In my case, I also had an error in the Device File Explorer: Error initializing ADB: Android Debug Bridge no found.
I fixed the problem following Error initializing ADB: Debug Bridge not found: I selected the latest Android API Platform as Project SDK in File/Project Structure.

close project
delete .dart_tool,.idea,build files
start android studio,logcat will display

Just go to File => Project Structure => and in the “SDK project” choose “Android”

Go to File > Project Structure Project or use cmd + ; or
Then click on "Facets" and press + icon in the upper right corner and add Android from the list.
Credit to #MrWeeMan

Some times for some reasons like flutter clean or changing in files directory, android studio usually excludes some files from project modules. here is some simple steps to help you solve the problem:
go to File --> Project Structure --> Modules
There are 2 common scenarios.
Android studio might have completely removed your project from modules. For this you need to add it again using steps shown in the picture below.
Click on the plus icon and the add your project here. Then press Apply and lastly OK.
Android studio just excluded some of the files and folders from your flutter project. In the right panel you can see them in red. just remove them from exclude list and again Apply and OK.
NOTE: In both scenarios you need to stop the project and rerun it. or better close and reopen android studio

You can enable verbose logging for flutter if you are looking for AppId or something of that sort.

Flutter has not logcat flutter show error in the console inside Run tab.IF you want to see error and crash report click on run tab.