Gradle buildConfigField with integer variable

Question

I would like to define a build config filed where I can use a variable defined in the gradle script it self:

def someVar = 512
android {
...
    buildConfigField 'int', 'SOME_INT_FIELD',  someVar
}

But this produces following error:

Error:(25, 0) Gradle DSL method not found: 'buildConfigField()'

Possible causes:
The project 'PROJECT' may be using a version of Gradle that does not contain the method.

The build file may be missing a Gradle plugin.

I could use quotes like:

def someVar = 0
android {
...
    buildConfigField 'int', 'SOME_INT_FIELD',  '"' + someVar + '"'
}

But this comes to a compiler error in BuildConfig

// Fields from default config.
public static final int SOME_INT_FILED = "512";

So for now I stay with:

def someVar = 0
android {
...
    buildConfigField 'String', 'SOME_INT_FIELD',  '"' + someVar + '"'
}

and use it like:

final int value = Integer.valueOf(BuildConfig.SOME_INT_FIELD);

Does anybody has better solution or do I use buildConfigField wrong?

(I also tried using parentheses in combination with any of possibility above.)

score 56 · Accepted Answer · answered Jul 28 '16 at 11:28

56

I found a solution, so maybe this answer will help somebody in future.

def String globalVersionCode

defaultConfig {
    applicationId "com.test.gradle.build"
    minSdkVersion 15
    targetSdkVersion 22
    versionCode 1
    versionName "0.1"

    globalVersionCode = versionCode
}

buildTypes {
    release {
         buildConfigField ("int", "DatabaseVersion", globalVersionCode)
    }
}

And now in java I can get DatabaseVersion variable:

public static final int DB_VERSION = BuildConfig.DatabaseVersion;

answered Jul 28 '16 at 11:28

Beyka

1,372
1
10
15

3

Thanks, the key is to define the variable as type of 'String', but use 'int' for buildConfigField. That makes any casting and parsing unnecessary. That's what I was looking for. – salcosand Jul 28 '16 at 11:52
don't forget the commas guys – karuhanga Dec 26 '18 at 11:25

score 12 · Answer 2 · answered May 02 '18 at 10:40

Declaring an int field in build.gradle should not and does not require parsing at java side.The only mistake in your code was use of double quotes. Correct way is given below-

buildConfigField 'int', 'SOME_INT_FIELD', '512'

With above in your build.gradle file, you can use it simply as an int in java code-

public static final int SOME_INT_FIELD = BuildConfig.SOME_INT_FIELD;

score 8 · Answer 3 · answered May 18 '18 at 14:24

8

Try this:

int val = 10
buildConfigField 'int', 'SOME_INT_FIELD', val.toString()

answered May 18 '18 at 14:24

Ashwin

7,277
1
48
70

score 5 · Answer 4 · answered Mar 12 '21 at 08:00

You may get some reason to use same gradle file and also use in java files.

def boolean isMyFlag

compileSdkVersion 30
defaultConfig {
    applicationId "com.test.gradle.build"
    minSdkVersion 21
    targetSdkVersion 22
    buildConfigField 'int', 'Version_code', "3"
    buildConfigField 'String', 'Version_Name', "'0.1'"
    buildConfigField "boolean", "myFlag", "${isMyFlag}"

}

And now you can use in java as well as in gradle file too.

// Use for Java
if(BuildConfig.myFlag){
    // My logic here;
}

and

// Use for gradle
if (isMyFlag) {
    implementation 'com.my.dependency.classes:my-module:2.3'
}

My solution is works for both place Java and build.gradle files as you may get some logic like this.

Note that you can also override the default values in `buildTypes` and `productFlavors` blocks. Combined with properties files, this allows you to have consistent build- and run-time configuration. — cji, Nov 08 '22 at 13:59

score 2 · Answer 5 · answered Sep 19 '19 at 03:58

2

def someVar = 100

buildConfigField 'int', 'SOME_INT_FIELD',  String.valueOf(someVar)

I use the above to resolve the question, hope to help you .

answered Sep 19 '19 at 03:58

peerless2012

179
1
7

Gradle buildConfigField with integer variable

5 Answers5