Android studio logcat nothing to show

Question

I installed Android Studio yesterday  and I tried to use the LogCat to see the logs  But there is nothing to show in the logcat  I used the terminal to run   adb logcat and it works     Is there someone who can explain to me how to use logcat in Android Studio

User · Answer

Had the same issue today   Apparently I had eclipse running too and all the logcat output was redirected to eclipse  Since the logs can only be shown at once place  make sure you dont have multiple debuggers running

User · Answer

Read this if you are still stuck with logcat being empty       I ve just solved this after MONTHS of annoyment and trouble  Nothing helped  the device monitor worked fine during debugging but the standard logcat view was always empty     The reason was annoyingly simple  The logcat view was there but it had been moved to 0 width by an update     You are in  ALT 6  Tab  you see two tabs in there  ADB logs  and  Devices   logcat  Devices   logcat really means that it consists of Devices AND logcat  split by a vertical border  The vertical border can be moved and during an update it seems to have moved to 100  right     This results in the logcat to be collected but not displayed  move your mouse pointer to the right of the tool window and just DRAG logcat back into view     This solution won t help everyone but I found many people with working ADB connection and still no logcat output  those might be hit by the same problem

User · Answer

In my case  in the developer options menu there is an option called   Revoke USB debugging authorisations    Once you revoke all the existing authorisations it will ask again to trust the computer that you are using after that it started to show the logs again

User · Answer

Try the points mentioned by  Robert Karl in this thread   If nothing works then you can surely see the logs through android device monitor   Launch the android device monitor  select DDMS perspective    then select your device as shown in the screenshot   You can apply filter as per your requirements

User · Answer

Restarting Android Studio helped me

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For me it was not working only for my application  it was working  if no filter has been selected  option on right side   But I needed to see only my app  therefore I found out  that if I do my own filter and filter it to package name  it is working as it should  I hope it could help to you too

User · Answer

For Windows user  Use this script tool  Make sure you have already set the ADB env for the system  Android Logcat script  Save to bat file Edit file  Replace com example abc with your package id Double click to open the file or open via MobaXTerm  for easy find the text   p s  Let s star my repo if this answer is helpful  Thanks

User · Answer

These helped me    1 Enable ADB integration   2  Go to Android Device Monitor  Check if your device is online and Create a required filter

User · Answer

Make sure you have Logger buffer sizes propper value in your emulator developer menu option

User · Answer

In Android 3 6 1 I had to   Upgrade to latest Android Studio version  4 x x  Restart Logcat Restart the app Restart Android Studio Restart the Android testing device

User · Answer

In my case I was sending empty tag i e  Log d     My Log      Instead send a tag name  Log d  Class name   My Log      Hope it helps someone

User · Answer

You need to press Alt 6 twice to restart the logcat window  That way it ll show the log outputs   The problem mainly happens in debug mode

User · Answer

First make Sure developer option is enabled in your device  Device is connected  Verbose  Show Only Selected application

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I just fixed it on mine  Look for tiny icons on the far right of the DDMS display which restore the Devices Logcat view and the ADB View    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

User · Answer

I checked the answer and only found my mistake accidentally while checking my logcat  Make sure the box on the right says  Show only selected application   Mine was showing  Firebase   so it showed me messages from Firebase

User · Answer

Run this command in terminal  It will start working again   adb kill-server  amp  amp  adb start-server

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Easy fix that worked for me  after trying some of these other suggestion    My logcat was sitting blank in a separate window  on my second screen    Just had to drag the Logcat tab back to it s original place in the debug panel next to the Debugger and Console tabs  and VOILA    it began immediately updating and showing all processes verbose   So   If your logcat is anywhere outside of the debugger panel  i e  the logcat tab isn t sitting nested alongside the debugger and console tab  then it won t receive updates and will sit there blankly   Don t know if this is an issue with older versions of Android Studio   But again  easy to try and if it works    it works

User · Answer

For me  the issue was that I had two emulators with the same name  I created it  deleted it  and then created it again with the same name   There were two emulator entries in the logcat dropdown and it was connected to the wrong one  All I had to do was switch to the other one  I prevented the problem permanently by renaming the emulator

User · Answer

In my case  I removed  image  from the little dropdown on the right  It showed up just fine after that  That s because it will be searching the log for the keyword in that searchbox  so if it doesn t find any matches  it returns blank

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I had a custom ROM on my phone which for some reason did not output logcat  but the emulator and another device did  Wiping and installing the ROM got the logcat working again

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In my case I just had filtered the output so it appeared empty even after restarting Logcat etc

User · Answer

That occasionally occurs to me while using emulator  I just plug in a device and run the app  The Logcat gets back to work and so it does when I get back to the emulator   I guess that just switching two devices and or emulators does the trick as well

User · Answer

I get into this state often  Logcat is blank  Debugging works  I can hit breakpoints  No filters are set  Log level is on Verbose  I fix it by repeatedly looping through the following    Restart logcat  see Zatziky s answer above  Change the log level to Debug  or anything else  and back to Verbose  unplugging and plugging back in the device running adb kill-server  amp  amp  adb start-server Close Android Studio and launch ddms on the command line  Restart Android Studio   And finally restarting the computer if all else fails   The problem is intermittent  I think Android Studio is just buggy

User · Answer

Make sure you have enabled the build variant to  debug  in the Build Variants context menu   You can find this at the bottom left corner of the window   This option will be set to release mode  if you have signed the apk for the application previously  This causes the debug messages not to show in the log cat

User · Answer

Go to run- debug  If incase you have lose connection with host  it will ask permission to reconnect  Click yes  That should do it

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I had the same symptoms but my problem was way simpler and really my mistake  I had the wrong filter set   The solution was just to verify that I had the correct filter set

User · Answer

Some custom rom s disable logging for performance reasons  squeezing   s wherever they can  Check your rom s in-built apps or tweak menu of your rom to enable this   I was running Kushan s Galaxy S4 Rom on my i9505 and I wasn t aware that it had disabled logging by default in order to gain the most minute level of performance increase  but apparently this isn t uncommon on custom built  performance  oriented roms   Took me an age to discover this - very annoying as it would show me how many messages were logged  just not their detail

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When everything else didn t work  here s what I did  Since adb logcat worked nicely  I decided to rely on it  Running adb logcat -v color in the Android Studio s embedded terminal produced outputs similar to the normal logcat  and allowed code links to work too   But this came with a few issues   You can t specify a package to watch  Using the --pid  lt your PID gt  option  you can watch the output of a single process  But since every time you restart your app the PID changes  you have re-run this command with every restart  The colors are annoying  in my opinion   The output fields are not aligned with previous messages  the whole thing is not well formatted which makes following the logcat much harder than it should be  the same happens with the embedded logcat  though    So I decided to make my own tool to automatically watch my package PID s  and prettify the logcat output  import java awt AWTException  import java io    import java util ArrayList  import java awt Robot  import java awt event KeyEvent   public class Logcat        private static final String ADB FILE PATH    quot adb quot           Customizations      private static final Color     V COLOR   Color RESET      private static final Color     D COLOR   Color RESET      private static final Color     I COLOR   Color RESET      private static final Color     W COLOR   Color BLUE      private static final Color     E COLOR   Color RED BRIGHT      private static final Color  HINT COLOR   Color MAGENTA BOLD BRIGHT      private static final Color OTHER COLOR   Color GREEN BOLD BRIGHT       private static final int       DATE LENGTH     5      private static final int       TIME LENGTH    12      private static final int PROCESS ID LENGTH     5      private static final int  THREAD ID LENGTH     5      private static final int  LOG LEVEL LENGTH     1      private static final int        TAG LENGTH    20      private static final int    MESSAGE LENGTH   110       private static final String SEPARATOR    quot     quot       private static final String CONTINUATION    quot   quot       private static final String INDENTATION    quot    quot        private static final int PROCESS IDS UPDATE INTERVAL MILLIS   1224       private static final int HISTORY LENGTH   1000          State      private static boolean skipProcessIDCheck      private static ArrayList lt String gt  processIDs   new ArrayList lt String gt          private static String logLevelToShow  quot V quot       All       private static Process logcatProcess      private static boolean appClosed      private static boolean stopEverything       private static String   history   new String HISTORY LENGTH       private static int currentLocationInHistory  historyLength       public static void main final String args               clearAndroidStudioConsole            System out println  quot besm Allah quot                Get processes ids of the provided package          if  args length  0                skipProcessIDCheck   true            else               skipProcessIDCheck   false              getProcessIDs     args 0          Do it once before we start              monitorProcessIDs args 0          Do it periodically from now on                        Start capturing and prettifying logcat          if   monitorLogcat                  stopEverything   true              return                        Handle user input          handleUserInput               private static void watch final Process process  final ProcessListener listener                Read process standard output and send it to the listener line by line          new Thread                 public void run                     BufferedReader bufferedReader   new BufferedReader new InputStreamReader process getInputStream                      String line    quot  quot                   try                       do                           if  bufferedReader ready                                  line   bufferedReader readLine                                if  line  null  amp  amp   line isEmpty    listener onNewLine line                             else                               Thread sleep 100                                                   while  line  null  amp  amp   stopEverything                     catch  Exception e    e printStackTrace                              start               private static void monitorProcessIDs String packageName                Continuously monitor the process IDs of this package and update when changed          new Thread                 public void run                     do                       try   Thread sleep PROCESS IDS UPDATE INTERVAL MILLIS     catch  InterruptedException e                         getProcessIDs packageName                     while   stopEverything                           start               private static void getProcessIDs String packageName                Get the process IDs associated with this package once          ArrayList lt String gt  newProcessIDs   new ArrayList lt String gt             Runtime runtime   Runtime getRuntime            try               Process getPIDProcess   runtime exec ADB FILE PATH    quot  shell ps quot                watch getPIDProcess   line  - gt                    if  line contains packageName                         newProcessIDs add removeRedundantSpaces line  split  quot   quot   1                                                  getPIDProcess waitFor                Thread sleep 500       Make sure we ve already handled all the input from the process            catch  Exception e    e printStackTrace                  Return immediately if program is closed          if  stopEverything  return               Some action upon getting the pid s           boolean shouldRepeatHistory   false          if  newProcessIDs isEmpty                      Just closed              if   appClosed                    appClosed   true                  prettify  quot ----- App closed ----- quot                            else if  appClosed                    Just opened  clear              appClosed   false              clearAndroidStudioConsole                prettify  quot ----- App opened ----- quot                shouldRepeatHistory   true            else                   Detect changes in processes              for  String pid   newProcessIDs                    if   processIDs contains pid                         clearAndroidStudioConsole                        prettify  quot ----- Process es  changed  or app restarted - some logs could have been missed  ----- quot                        shouldRepeatHistory   true                      break                                                         Set the new PID s           processIDs   newProcessIDs          if  shouldRepeatHistory  repeatHistory               private static boolean monitorLogcat              Runtime runtime   Runtime getRuntime            try               logcatProcess   runtime exec ADB FILE PATH    quot  logcat -v threadtime quot                watch logcatProcess   line  - gt                        Learn history  in case we need to repeat it                  if  appClosed    processLogcatLine line                         history currentLocationInHistory    line                      currentLocationInHistory    currentLocationInHistory   1    history length                      if  historyLength lt history length  historyLength                                                catch  Exception e                e printStackTrace                return false                     return true             private static boolean processLogcatLine String line            try               return prettify line             catch  Exception e                print line  OTHER COLOR               System out println                    Debug              e printStackTrace                return true                          Returns true if line should be kept in history      private static synchronized boolean prettify String line             if  line startsWith  quot - quot                     It s a  quot beginning of  lt something gt  quot  line              print line  HINT COLOR               System out println                return true                        Get the individual fields          String      date   line substring 0  line indexOf        line   line substring line indexOf      1   line   line trim            String      time   line substring 0  line indexOf        line   line substring line indexOf      1   line   line trim            String processID   line substring 0  line indexOf        line   line substring line indexOf      1   line   line trim                Break early if possible          if   skipProcessIDCheck  amp  amp   processIDs contains processID trim     return false              Continue parsing          String  threadID   line substring 0  line indexOf        line   line substring line indexOf      1   line   line trim            String  logLevel   line substring 0  line indexOf        line   line substring line indexOf      1   line   line trim                Break early if possible          switch  logLevel                case  quot V quot   if    quot V quot      contains logLevelToShow   return true  break              case  quot D quot   if    quot VD quot     contains logLevelToShow   return true  break              case  quot I quot   if    quot VDI quot    contains logLevelToShow   return true  break              case  quot W quot   if    quot VDIW quot   contains logLevelToShow   return true  break              case  quot E quot   if    quot VDIWE quot  contains logLevelToShow   return true  break                        Continue parsing          String       tag   line substring 0  line indexOf        line   line substring line indexOf      1   line   line trim                Because some tags have a trailing  quot   quot           if  line startsWith  quot   quot                  tag     quot   quot               line   line substring 1                         Indent lines starting by  quot at quot           String indentation    quot  quot           if  line startsWith  quot at  quot                  indentation    quot     quot    INDENTATION              line    quot   quot    INDENTATION   line                        Print the prettified log          Color color          switch  logLevel                case  quot V quot   color   V COLOR  break              case  quot D quot   color   D COLOR  break              case  quot I quot   color   I COLOR  break              case  quot W quot   color   W COLOR  break              case  quot E quot   color   E COLOR  break              default                  color   Color RESET                     String fields   adjustLength      date        DATE LENGTH    SEPARATOR                           adjustLength      time        TIME LENGTH    SEPARATOR                           adjustLength processID  PROCESS ID LENGTH    SEPARATOR                           adjustLength  threadID   THREAD ID LENGTH    SEPARATOR                           adjustLength  logLevel   LOG LEVEL LENGTH    SEPARATOR                           adjustLength       tag         TAG LENGTH    SEPARATOR              Split the message onto multiple lines if needed          String message   chunkPreservingParentheses line  MESSAGE LENGTH  2           print fields   message  color           System out println             while  line length    gt  message length                      Debug                print line  OTHER COLOR                 System out println  quot Line   quot    line length      quot length   quot    message length      quot   cont   quot    CONTINUATION length      quot dent   quot    indentation length                   System out println                    Remove the already printed part              line   line substring message length  -CONTINUATION length                     Add a dot to make links work              boolean shouldAddDot false              if  line matches  quot                123456789  1234567890        quot    shouldAddDot   true                  Indent              line    shouldAddDot    quot   quot     indentation isEmpty      quot  quot     quot   quot      indentation   line                  Take another chunk              message   chunkPreservingParentheses line  MESSAGE LENGTH  2 indentation length                     Front pad to align this part with the message body              String paddedMessage   message              for  int i 0  i lt fields length    i    paddedMessage         paddedMessage                  Print              print paddedMessage  color               System out println                       return true      Keep in local buffer             private static String adjustLength String text  int length            while  text length    lt  length  text                 if  text length    gt  length                text   text substring 0  length-CONTINUATION length                 text    CONTINUATION                    return text             private static String chunkPreservingParentheses String text  int length  int minChunckLength             if  text length    lt   length  return text              Take a chunk out of the text          String chunk   text substring 0  length-CONTINUATION length      CONTINUATION              Check if a paranthesis was opened and not closed          int lastOpenParanthesisIndex   chunk lastIndexOf               int lastCloseParanthesisIndex   chunk lastIndexOf               if  lastCloseParanthesisIndex  lt   lastOpenParanthesisIndex        Also works when either is not found              if  minChunckLength lt 1  minChunckLength   1              if  lastOpenParanthesisIndex  gt  minChunckLength CONTINUATION length         Avoid endless loops                  int includeParenthesisSize    CONTINUATION length   gt 0    1   0                  chunk   text substring 0  lastOpenParanthesisIndex includeParenthesisSize-CONTINUATION length      CONTINUATION                                   return chunk             private static void repeatHistory             int index   currentLocationInHistory-historyLength          if  index  lt  0  index    history length          for  int i 0  i lt historyLength  i                  processLogcatLine history index                index    index   1    history length                       private static void print String text  Color color            System out print color           System out print text           System out print Color RESET              private static String removeRedundantSpaces String text            String newText   text replace  quot    quot    quot   quot            while   text equals newText                 text   newText              newText   text replace  quot    quot    quot   quot                      return text             private static void clearAndroidStudioConsole                 Couldn t find a reliable way to clear Intellij terminal scrollback  so we just print            a LOT of newlines          StringBuilder bunchOfNewLines   new StringBuilder            for  int i 0  i lt 124  i    bunchOfNewLines append System lineSeparator             System out print bunchOfNewLines               Scroll the current line to the top of the window          try                  If we are on Windows              new ProcessBuilder  quot cmd quot    quot  c quot    quot cls quot   inheritIO   start   waitFor              catch  Exception e                    We are not on Windows              bunchOfNewLines   new StringBuilder                for  int i 0  i lt 124  i    bunchOfNewLines append  quot  b r quot                System out print bunchOfNewLines                        private static void handleUserInput                 Line read  Unfortunately  java doesn t provide character by character reading out of the box          BufferedReader bufferedReader   new BufferedReader new InputStreamReader System in            String input    quot  quot           do               try                   if  bufferedReader ready                          input   input   bufferedReader readLine   toUpperCase                            Set log level                      if  input equals  quot V quot    input equals  quot D quot    input equals  quot I quot    input equals  quot W quot    input equals  quot E quot                               if   logLevelToShow equals input                                 logLevelToShow   input                              clearAndroidStudioConsole                                repeatHistory                                                       prettify  quot ----- Log level set to  quot    logLevelToShow    quot  ----- quot                           else if  input equals  quot C quot                                  Clear screen and history                          clearAndroidStudioConsole                            historyLength   0                                          else                       Thread sleep 100                                   catch  Exception e    e printStackTrace                      Check if the logcat process is still alive              if   logcatProcess isAlive                      prettify  quot ----- adb logcat process terminated ----- quot                    stopEverything   true                           while   stopEverything  amp  amp   input equals  quot Q quot                 Allow all monitoring threads to exit          stopEverything   true             interface ProcessListener           void onNewLine String line              enum Color               Thanks to this answer  https   stackoverflow com a 51944613 1942069            Color end string  color reset         RESET  quot  033 0m quot                Regular Colors  Normal color  no bold  background color etc          BLACK    quot  033 0 30m quot            RED      quot  033 0 31m quot            GREEN    quot  033 0 32m quot            YELLOW   quot  033 0 33m quot            BLUE     quot  033 0 34m quot            MAGENTA  quot  033 0 35m quot            CYAN     quot  033 0 36m quot            WHITE    quot  033 0 37m quot                Bold         BLACK BOLD    quot  033 1 30m quot            RED BOLD      quot  033 1 31m quot            GREEN BOLD    quot  033 1 32m quot            YELLOW BOLD   quot  033 1 33m quot            BLUE BOLD     quot  033 1 34m quot            MAGENTA BOLD  quot  033 1 35m quot            CYAN BOLD     quot  033 1 36m quot            WHITE BOLD    quot  033 1 37m quot                Underline         BLACK UNDERLINED    quot  033 4 30m quot            RED UNDERLINED      quot  033 4 31m quot            GREEN UNDERLINED    quot  033 4 32m quot            YELLOW UNDERLINED   quot  033 4 33m quot            BLUE UNDERLINED     quot  033 4 34m quot            MAGENTA UNDERLINED  quot  033 4 35m quot            CYAN UNDERLINED     quot  033 4 36m quot            WHITE UNDERLINED    quot  033 4 37m quot                Background         BLACK BACKGROUND    quot  033 40m quot            RED BACKGROUND      quot  033 41m quot            GREEN BACKGROUND    quot  033 42m quot            YELLOW BACKGROUND   quot  033 43m quot            BLUE BACKGROUND     quot  033 44m quot            MAGENTA BACKGROUND  quot  033 45m quot            CYAN BACKGROUND     quot  033 46m quot            WHITE BACKGROUND    quot  033 47m quot                High Intensity         BLACK BRIGHT    quot  033 0 90m quot            RED BRIGHT      quot  033 0 91m quot            GREEN BRIGHT    quot  033 0 92m quot            YELLOW BRIGHT   quot  033 0 93m quot            BLUE BRIGHT     quot  033 0 94m quot            MAGENTA BRIGHT  quot  033 0 95m quot            CYAN BRIGHT     quot  033 0 96m quot            WHITE BRIGHT    quot  033 0 97m quot                Bold High Intensity         BLACK BOLD BRIGHT    quot  033 1 90m quot            RED BOLD BRIGHT      quot  033 1 91m quot            GREEN BOLD BRIGHT    quot  033 1 92m quot            YELLOW BOLD BRIGHT   quot  033 1 93m quot            BLUE BOLD BRIGHT     quot  033 1 94m quot            MAGENTA BOLD BRIGHT  quot  033 1 95m quot            CYAN BOLD BRIGHT     quot  033 1 96m quot            WHITE BOLD BRIGHT    quot  033 1 97m quot                High Intensity backgrounds         BLACK BACKGROUND BRIGHT    quot  033 0 100m quot            RED BACKGROUND BRIGHT      quot  033 0 101m quot            GREEN BACKGROUND BRIGHT    quot  033 0 102m quot            YELLOW BACKGROUND BRIGHT   quot  033 0 103m quot            BLUE BACKGROUND BRIGHT     quot  033 0 104m quot            MAGENTA BACKGROUND BRIGHT  quot  033 0 105m quot            CYAN BACKGROUND BRIGHT     quot  033 0 106m quot            WHITE BACKGROUND BRIGHT    quot  033 0 107m quot             private final String code           Color String code    this code   code             Override public String toString     return code             Just dump this code into Logcat java and compile using  javac Logcat java  And run inside the Android Studio s embedded terminal  java Logcat  lt your package name gt   For example  java Logcat com nomone vr desktop  The result looks like this   It s highly customizable  I ve separated most of the options in the first section of the app  so you can tweak the colors and formatting easily  If the adb tool is not in your PATH environment variable  just set its full path in the ADB FILE PATH variable  in the code  before compiling  When the application is running  you can type the following shortcuts   c to clear the screen and local buffer  v  i  d  w  e to change the logcat level  q to quit gracefully  Ctrl c works too   Unfortunately  you have to press enter after pressing these keys  Seems like Java doesn t allow single character input from console without writing system specific code  Sorry  Disclaimer  This doesn t work if multiple devices are connected using adb  I haven t thoroughly tested this  I ve only used it for a while on a few devices  I haven t tested this on Windows or Mac  but I tried to avoid using anything system specific  so it should still work   I hope this solves your problem

User · Answer

In my case it disconnected over the TCP connection  even though the device appeared   Calling  adb connect  lt device ip gt    Restarted logcat OK

User · Answer

I tried the suggestions above  However  none of them worked  I then did the following which surprisingly worked     Disconnect the USB from the device Connected the device via Wi-Fi using the commands adb tcpip 5555 and adb connect  lt device ip gt  Disconnected the device from the adb using adb kill-server Connected the device back via USB   The LogCat then showed the logs  Even though the logs were available at step 2  the following steps resolved the issue for me when connecting via USB

User · Answer

My problem solved  after I  add  android debuggable  true  under application in your AndroiManifest xml  even the ide mark as a wrong syntax

User · Answer

Rebooting the phone I was testing fixed the issue   I used an old LG4 with Android 6   I tried unplugging and plugging again  restarting Android Studio  restarting the logcat  invalidating caches - Nothing worked

User · Answer

In Android Studio 0 8 9  I opened Android Device Monitor  selected my emulator from the Devices list and got the output in the LogCat tab    After that  I went back to the main view of Android Studio and selected Restore Logcat view in the right of the Android DDMS tab and there it was    If this doesn t work  you could see your logcat in the Android Device Monitor as I explained in the first sentence

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For me  the problem was that the device was connected in the Charge only mode   Changing the mode to Media device  MTP   or Transfer files in some devices  solved the problem

User · Answer

Step 1  Connect Your Phone with Android Developer option On and USB Debug On   Step 2  Go TO View  gt  Tools Window  gt  Logcat  Step 3  Before Run Project Make Sure Your Phone Connect Android Studio  Then run application   Note  If You Can not Show Logcat Just Restart Android Studio   File  gt  Invalid Caches  restart

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I just changed the applictionId and logcat stopped working  To reset it you have to change the package name  Just click on top right corner drop down in Logcat window which show your app package name and click on it and then click Edit Filter Configuration now change the package name  It will start working

User · Answer

Make sure you are importing the right class   import android util Log

User · Answer

Try to click on the icon on the very right part of the  Android  view  you should see Logcat tab on the Android view  you can bring Android view up by pressing Alt 6

User · Answer

This may not be your issue  but I ve found that when having multiple windows of Android Studio open  logcat is only directed to one of them  and not necessarily the one that s running an active application   For example  Window 1 is where I m developing a Tic-Tac-Toe app  and Window 2 is where I m developing a weather app   If I run the weather app in debug mode  it s possible only Window 1 will be able to display logcat entries

User · Answer

On the right side of tab  Devices logcat  there is the button  Show only Logcat from selected Process   Its not perfect  because everytime I run another process I need to push it again  but thats the only solution that works for me  So far

User · Answer

Logcat has a little icon to the right of logcat  You can use the icon to turn logcat on and off  I can usually make logcat active by clicking the icon  maybe several times

User · Answer

Try to close the project and re-open it  It worked for me  Logs will be reappear

User · Answer

Restarting logcat helps me always

User · Answer

In addition to all great answers  make sure that you import right BuildConfig if you use it  I m using BuildConfig DEBUG  so one day my IDE automatically imported the wrong class import com google firebase BuildConfig   or it may be import com adjust sdk BuildConfig   After changing import to the right one everything was fine  import com yourapp BuildConfig

User · Answer

Well I ve tried all of the other answers and nothing is working for poor logcat  My issue with logcat is that it never worked to begin with  From the time I installed Android studio and finally was able to connect a device to adb it never gave me output  It s probably caused by my borked 32 bit Windows 7 setup though    So I wrote a batch script to run through the terminal to run apps with logcat   adb shell am start -n  com package name com package name Activity  -a android intent action MAIN -c android intent category LAUNCHER adb shell pidof com package name  gt  pid for  f   i in  pid  do  set pid   i  echo  pid  adb logcat   V --pid  pid  ENDLOCAL   Put this with corrected directory paths and package names into a logcat bat or whatever bat  file   place the file in your AndroidStudioProjects package name  folder then you can run      C  User me AndroidStudioProjects package name logcat or whatever    in the terminal   Note that you can change what the logcat displays by changing        V   In the adb logcat command   example   E shows only  E rror tags    I hope this was helpful to someone else

User · Answer

Best way to fix some unnecessary changes is to invalidate caches  Go to FILE -  click  INVALIDATE CACHES RESTART  then a dialog box will pop-up  Select   INVALIDATE CACHES RESTART  button    Android studio will automatically restart and rebuild the index

User · Answer

Logcat can fail if you are using more than 1 version of adb at the same time  One in Android Studio  and one in the terminal   You might have different version of adb from   sudo apt-get install android-tools-adb  which will create  usr bin adb the Android SDK which contains  android-sdk  platform-tools adb  or from the output of an AOSP build which creates out host linux-x86 bin adb  To see if this problem effects you  open idea log using  Help -  Show Log in Files  and look for a line like  Initializing adb using  home repkap11 android-sdk platform-tools adb   Compare this path with  which adb  in your terminal  If they don t match  this problem effects you   Android studio looks for  android-sdk  platform-tools adb and doesn t care about your PATH  I replaced the version of adb in android-sdk using a symlink  but simply  sudo apt-get remove android-tools-adb  would work as well

User · Answer

To run Logcat  restart the Logcat and then open DDMS to open it click on the Android icon in top right corner of Android DDMS    and set the Log Level  Debug  And Run your app

User · Answer

In android Studio application you need to click Debug application option  Shift f9  to run in debug mode and to enable LogCat

User · Answer

I found 3 ways to solve this    Debug on an Android 4 0 device  I ran it on an android Lollipop device before   Click the restart button in DDMS  Launch Android Device Monitor   and you will find log in logcat  Good luck

User · Answer

In Android studio 0 8 0 you should enable ADB integration through Tools -  Android  before run your app  Then the log cat will work correctly  Notice that if you make ADB integration disabled while your app is running and again make it enable  then the log cat dosen t show anything unless you rebuild your project

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I had the same problem but I solved by the following steps  Try this once   1  In the android studio   2  Open android Monitor window bottom of android studio   3  You can see the drop down in the right corner spinner   4  select -- Show only Selected application

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Restart your logcat    It will fixed

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Not a technical answer but you might want to check the search box for the logcat  If there is any character inputted  your logcat will be empty as it will be searching for that certain character or word  and then if its not present  your logcat log will be totally empty

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In my case  I tried to solve this with other answers  with no results  I discovered  unintentionally  that empty tags are almost never shown  Android Studio 1 4   So  try to put any letter  blank spaces won t work  inside the TAG   Log wtf  x    Android Studio Team  solve this  please

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Check if you have hided it   If it is hiding problems the go through given image to display it or ALT   6

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Full nuclear solution  ONLY USE THIS AFTER TRYING EVERYTHING ELSE because this will erase all your settings and preferences as well as stored images and everything that makes your emulators run until you reinstall and reconfigure  In my case it took about 20 minutes for both steps because I didn t customise a lot except for using Darcula    Delete your  AndroidStudioBeta config files directory   For linux users this is found under  home  username   AndroidStudioBeta For windows users  I m not sure  The documentation on it is rather vague in my opinion  Probably somewhere under C  Users your user  Application Data   Check to see if it works yet  if it doesn t then also reinstall the SDK    Rather drastic but I tried all the other things on this page  connected device  no filters  restarting the service  everything on this page and it just didn t work

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You may put some text in the search and filter out the Logcat result  That was the reason for my problem

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Nothing from all of this helped  my logcat was disfunctional     After a lot of angry searching I found a solution that seems to work  1  Make sure logcat itself is working  use DDMS from Tools- Android  and if it does close DDMS window again 2  Now go to Tab 5  Debug   there select Logcat  this is not the same logcat as in Window 6   3  The window is empty just like Window 6  but now start a debugging run  For me logcat in the Debug window now started to show all the stuff again  Also when normally running the application the Debug- logcat view is still functional while the Tool Window  6  logcat  is disfunctional as before    This is a hack  however it leads to the normal logcat behaviour with highlighted lines and syntax you need for debugging and developing  Just from now on you need to access it through the debug Window

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It s weird to still encounter this problem even on a recent version of Android Studio  I read through the long list of solutions but they did not work for me  The accepted answer worked on an earlier version of Android Studio   I guess it was v2 3   I did the following to get Logcat working again    Logcat   Show only selected application   No filters      Logcat   No filters   Show only selected application     I expected resetting logcat should ideally give me the same effect but it didn t  Manually toggling filter was the only thing that worked   This is on Android Studio 3 0 1  stable   I can t update it before finishing the current project  The issue occurred when I started Android studio in the morning to continue the work I left at night  I hope the devs will look into this  It was painstaking to try over 15 solutions from stackoverflow and still see no result  It s even irritating to reveal another solution for future victims of this issue

[android-studio] Android studio logcat nothing to show

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