BuildConfig not getting created correctly (Gradle Android)

Question

I am trying to convert our Android application to a gradle build. I have the project and it's libraries building successfully. I am now trying to create separate apks for our various environments (dev/test/prod have different urls for the restful services they consume).

In searching around, the best way that I feel to do this is with making different BuildConfig for each environment. This is what I tried:

import java.util.regex.Pattern

buildscript {
    repositories {
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:+'
    }
}

apply plugin: 'android'

task('increaseVersionCode') << {
    def manifestFile = file("AndroidManifest.xml")
    def pattern = Pattern.compile("versionCode=\"(\\d+)\"")
    def manifestText = manifestFile.getText()
    def matcher = pattern.matcher(manifestText)
    matcher.find()
    def versionCode = Integer.parseInt(matcher.group(1))
    def manifestContent = matcher.replaceAll("versionCode=\"" + ++versionCode + "\"")
    manifestFile.write(manifestContent)
}

tasks.whenTaskAdded { task ->
    if (task.name == 'generateReleaseBuildConfig') {
        task.dependsOn 'increaseVersionCode'
    }
}

dependencies {
    compile 'com.android.support:support-v4:19.0.0' 
    compile files('libs/commons-io-2.4.jar',
                  'libs/google-play-services.jar',
                  'libs/gson-2.2.4.jar',
                  'libs/universal-image-loader-1.8.6.jar',
                  'libs/wakeful-1.0.1.jar')
    compile project(':pulltorefresh_lib')
    compile project(':edgeeffect_lib')
    compile project(':viewpagerindicator_lib')        
}

android {
    buildToolsVersion "18.1.1"
    compileSdkVersion "Google Inc.:Google APIs:18"

    defaultConfig { 
       minSdkVersion 14
       targetSdkVersion 18
    }

    buildTypes {
        debug {
            packageNameSuffix ".debug"
        }
        dev.initWith(buildTypes.debug)
        dev {
            buildConfigField "String", "URL_SEARCH", "\"https://dev-search.example.com\";"
            buildConfigField "String", "URL_CONNECT", "\"https://dev-connect.example.com\";"
            buildConfigField "String", "URL_SVC_NEWSLIST", "\"https://dev-mobilenews.example.com/newslist\";"
            buildConfigField "String", "URL_SVC_NEWSDETAIL", "\"https://dev-mobilenews.example.com/newsdetail\";"
            buildConfigField "String", "URL_SVC_REGISTERENDPOINTS", "\"https://dev-mobilenews.example.com/registerendpoints\";"
        }
        prod.initWith(buildTypes.release)
        prod {
            buildConfigField "String", "URL_SEARCH", "\"https://search.example.com\";"
            buildConfigField "String", "URL_CONNECT", "\"https://connect.example.com\";"
            buildConfigField "String", "URL_SVC_NEWSLIST", "\"https://mobilenews.example.com/newslist\";"
            buildConfigField "String", "URL_SVC_NEWSDETAIL", "\"https://mobilenews.example.com/newsdetail\";"
            buildConfigField "String", "URL_SVC_REGISTERENDPOINTS", "\"https://mobilenews.pdc-np-cf.lmig.com/registerendpoints\";"          
        }
    }

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }
    }
}

The problem is that my BuildConfig.java doesn't seem to get the static variables injected, therefore I get errors similar to:

/Users/path/to/project/MainActivity.java:348: error: cannot find symbol
            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(BuildConfig.URL_SEARCH)));
                                                                              ^
  symbol:   variable URL_SEARCH
  location: class BuildConfig
/Users/path/to/project/MainActivity.java:359: error: cannot find symbol
            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(BuildConfig.URL_CONNECT)));
                                                                              ^
  symbol:   variable URL_CONNECT
  location: class BuildConfig
/Users/path/to/project/MainActivity.java:600: error: cannot find symbol
            HttpPost httpPost = new HttpPost(BuildConfig.URL_SVC_REGISTERENDPOINTS);
                                                        ^
  symbol:   variable URL_SVC_REGISTERENDPOINTS
  location: class BuildConfig
/Users/path/to/project/service/AlarmNotificationService.java:145: error: cannot find symbol
        String requestUrl = BuildConfig.URL_SVC_NEWSLIST + "?"
                                       ^
  symbol:   variable URL_SVC_NEWSLIST
  location: class BuildConfig
/Users/path/to/project/service/NewsService.java:240: error: cannot find symbol
        String requestUrl = BuildConfig.URL_SVC_NEWSLIST + "?"
                                       ^
  symbol:   variable URL_SVC_NEWSLIST
  location: class BuildConfig
/Users/path/to/project/service/NewsService.java:530: error: cannot find symbol
            HttpPost httpPost = new HttpPost(BuildConfig.URL_SVC_NEWSDETAIL);
                                                        ^
  symbol:   variable URL_SVC_NEWSDETAIL
  location: class BuildConfig
6 errors

My build/source/buildConfig/debug/com/.../BuildConfig.java file contains:

/**
 * Automatically generated file. DO NOT MODIFY
 */
package com....;

public final class BuildConfig {
  public static final boolean DEBUG = Boolean.parseBoolean("true");
  public static final String PACKAGE_NAME = "com.....debug";
  public static final String BUILD_TYPE = "debug";
  public static final String FLAVOR = "";
  public static final int VERSION_CODE = 5;
}

What am I doing wrong?

Answer 1

Please, be sure that you are building "dev" or "prod" variant. There is no BuildConfig definition in default "debug" and "release" variant. In Android Studio, you can select current variant in bottom left corner:

To simplify your build.gradle file, you can define:

buildTypes {
    debug {
        buildConfigField "String", "URL_SEARCH", "\"https://dev-search.example.com\""
        // etc.
    }
    release {
        buildConfigField "String", "URL_SEARCH", "\"https://search.example.com\""
        // etc.      
    }
}

and then just use default "debug" and "release" variants.

At last, delete semicolon (sign: ';') from the value of buildConfigField parameter.

Answer 2

None of the solutions worked for me, I closed the project and opened again, and then rebuilt it because it clears all the generated stuff on closing and it worked, thank you.

Answer 3

For Android Studio Version

Android Studio Dolphin | 2021.3.1 Patch 1

Build #AI-213.7172.25.2113.9123335, built on September 30, 2022

Runtime version: 11.0.13+0-b1751.21-8125866 aarch64 VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.

What was I trying to do?

I set up three build variants for the app module, I wanted BuildConfig to be changed every time I change the build variant, for that particular variable defined in the build.gradle (app) configurations.

What didn't work

I have tried all three methods, DIDN'T WORK AT ALL, to regenerate my BuildConfig for the build variant I was changing:

1. File > invalidate cache and restart along with Build > Clean Project & Build > Rebuild Project
2. Build > Make Project alone
3. File > Sync Project with Gradle Files alone

What worked

Then I tried a combination which is surprisingly WORKING WELL:

1. First, Try Build > Make Project
2. Then File > Sync Project with Gradle Files

I hope it will work for that particular version I am not sure for other versions of Android Studio.

Thanks, @ravi, and @ibrokhim for partially answered for the case.

Answer 4

first do

File -> Invalidate Caches/Restart... -> Invalidate and Restart 

then do

Build -> Clean Project

then do

Build - > Rebuild Project 

Answer 5

Very logical Answer if this is not heppening in compose

    buildFeatures {
    // The first line should already be in your project!
    compose = true
    buildConfig = true
    }

This will now generate the file and you can use the BuildConfig.Debug in Application and everywhere.

Answer 6

You need to have this line in your gradle.properties file:

android.defaults.buildfeatures.buildconfig=true

Hope this helps

Answer 7

Just in case that helps somebody else, in my case it was a missing import: import uk.co.yourpackage.yourapp.BuildConfig;

Somehow, nowhere in the doc does it mention you need that include! Made me think it was automatically imported somehow but it ISN'T. not for me at least... So much time lost... Hope that helps another newbie like me!

Answer 8

In my case I had to enable buildConfig as a build feature.

android {
    buildFeatures {
        buildConfig true
    }
}

Answer 9

In the project.ext.envConfigFiles array, ensure you set the debug to the right .env file you are using for development

Answer 10

Here is what fixed this for me:

File -> Invalidate Caches/Restart... -> Invalidate and Restart 

Answer 11

In my case, I was expecting the BuildConfig for my new gradle module created. But forgot to add it as a dependency in app: module.

Answer 12

Try to do

Build -> Clean Project

then do

Build - > Rebuild Project

If it doesn't work, try

File -> Invalidate Caches/Restart... -> Invalidate and Restart

then do

Build -> Clean Project

then do

Build - > Rebuild Project

Answer 13

I solve this problem as given below in this case Android studio will generate Build Config file itself

File -> Sync Project with Gradle Files

Answer 14

Follow these steps:

Step 1

File -> Invalidate Caches/Restart... -> Invalidate and Restart 

Step 2

Build -> Clean Project

Step 3

Build - > Rebuild Project 

Answer 15

I had similar problem related to build types being setup using .initWith(someotherbuildtype), BuildConfig was not being created properly. I had to switch to the parent build variant and build that first, then the build types that initWith the parent built fine.

Answer 16

I had same issue and fixed it like below:

buildConfigField 'String', 'BASE_URL', '"https://api.example.com"'

Answer 17

If you are modifying your Environment Variables, and they are not reflecting correctly in Android studio try doing:

Build -> Clean Project 
File -> Invalidate Caches/Restart... -> Invalidate and Restart 

Answer 18

In my case there was an string field resValue "string", "app_name", "MyApp" in strings.xml as well as in product flavours.

I did Invalidate Caches then Rebuild then android studion given the actual error of duplicate resources.

so Invalidate caches -> Rebuild -> Remove string resources which were already in buildconfigfield resvalue worked for me

I was using Android Studio Bumblebee 2021.1.1

Answer 19

In My Case I have First

File -> Invalidate Caches/Restart... -> Invalidate and Restart 

When project Restarts than

Build -> Clean Project

After Cleaning`

    Build -> Rebuild Project

Answer 20

Add this in build.gradle

buildFeatures {
    buildConfig = true
}

if using jet pack compose

 buildFeatures {
        compose = true
        buildConfig = true
    }

Answer 21

After trying everything, switching the build variant and selecting Build > Make Project worked for me.

Answer 22

I did all the things in the answers but still didn't work. I solved my problem by changing the package name in the manifest.xml file which still hadn't been updated :

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.android">