Host name may not be empty

Question

After upgrading my Android Studio, I got this error whenever I wanted to generate a signed Apk (without any detail of where the problem is). There was no problem when I just built Apk.

The Host name may not be empty

score 47 · Accepted Answer · edited Nov 25 '20 at 12:15

47

Check your Gradle scripts root. If there is this file: gradle.properties (Global Properties), check that values are correct.

In my case, I removed all these properties and my problem solved

systemProp.http.proxyHost=
systemProp.http.proxyPort=80
systemProp.https.proxyHost=
systemProp.https.proxyPort=80

edited Nov 25 '20 at 12:15

Pratik Butani

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answered Jun 01 '20 at 08:32

Mona Baharlou

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@RaviParmar maybe this error occurs in different cases. For my problem, It worked – Mona Baharlou Jul 01 '20 at 18:13
2

File location: ~/.gradle/gradle.properties – DoronK Oct 12 '20 at 09:04
1

I have same issue but this solution not working for me – iffan majid Nov 04 '20 at 08:43
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for windows it was located in C:\Users\{username}\.gradle\ folder – Nikunj Paradva Sep 04 '21 at 05:46
2

To be more specific it is system level `./gradle` dir having `gradle.properties` file. e.g for mac path is `/Users/[username]/.gradle/gradle.properties` – pRaNaY Jan 04 '23 at 05:20

score 12 · Answer 2 · answered Jun 20 '20 at 12:13

It may be problem with uploadMappingFile

Set the firebaseCrashlytics.enableMappingFileUpload Gradle extension property to true in your app-level build.gradle file.

// To enable Crashlytics mapping file upload for specific product flavors:
  flavorDimensions "environment"
  productFlavors {
    staging {
      dimension "environment"
      ...
      firebaseCrashlytics {
        mappingFileUploadEnabled false
      }
    }
    prod {
      dimension "environment"
      ...
      firebaseCrashlytics {
        mappingFileUploadEnabled true
      }
    }
  }

for more details visit here

This helped me. Many other suggestions did not, but this one did. Thank you — Konstantin Kozirev, Oct 27 '21 at 13:49

Samuel Ewudzi Incoom · Answer 3 · 2021-12-03T07:41:40.903

10

Yep, problem started at AS 4.0 up.. Here are the clearer fixes... (Cos Some may think the "gradle.properties" file being talked about here is what is in the AS project instead of the global one.

Delete the following lines from the "gradle.propeties" file on your PC gradle installation location

systemProp.http.proxyHost= systemProp.https.proxyHost= systemProp.https.proxyPort=80 systemProp.http.proxyPort=80

as seen in n my picture below here is a typical file location of this gradle.propeties file

Now click rebuild in your project and VIOLA... Problem solved

edited Dec 03 '21 at 07:41

answered Dec 03 '21 at 03:45

Samuel Ewudzi Incoom

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Thank you for adding pictures. It definitely works. – Raj Kanchan Nov 24 '22 at 10:04

score 0 · Answer 4 · answered Nov 07 '21 at 09:42

I got the same issue, I fixed that issue by applying Proguard rules,

https://firebase.google.com/docs/crashlytics/get-deobfuscated-reports?platform=android

In project proguard-rules.pro

-keepattributes SourceFile,LineNumberTable
-keep public class * extends java.lang.Exception

Gradle

firebaseCrashlytics { mappingFileUploadEnabled true }

score 0 · Answer 5 · answered Jan 24 '22 at 10:23

0

This issue is caused due to empty xml file in your res directory. Open the res directory in explorer/finder sort all the xml according to their size. Find the xml with 0kb / empty xml and delete it. Now you can create your signed bundled apk.

answered Jan 24 '22 at 10:23

shrikarkorwar

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score 0 · Answer 6 · answered Apr 07 '22 at 09:00

0

When I removed all the http.proxyPort then it works.

answered Apr 07 '22 at 09:00

imsjkumar

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Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Apr 07 '22 at 09:04

score 0 · Answer 7 · answered Apr 29 '22 at 11:25

For me, the issue was WebDriver requiring a fully qualified url. Switching from localhost:9000 to http://localhost:9000/ did the trick for me (hopefully helps others too).

This is because the WebDriver method void get(String url); was being called and giving the error:

The Host name may not be empty

The java doc for the param states:

Params: url – The URL to load. Must be a fully qualified URL

score 0 · Answer 8 · answered Apr 26 '23 at 08:45

For Mac users check your gradle.properties file located at /Users/[username]/.gradle/gradle.properties and remove the following properties

systemProp.http.proxyHost=
systemProp.http.proxyPort=80
systemProp.https.proxyHost=
systemProp.https.proxyPort=80

Host name may not be empty

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