How to generate buildConfigField with String type

In my Android Studio project there are two build configuration with some buildConfigField:

    buildTypes {
    def SERVER_URL = "SERVER_URL"
    def APP_VERSION = "APP_VERSION"

    debug {
        buildConfigField "String", SERVER_URL, "http://dev.myserver.com"
        buildConfigField "String", APP_VERSION, "0.0.1"
    }

    release {
        buildConfigField "String", SERVER_URL, "https://myserver.com"
        buildConfigField "String", APP_VERSION, "0.0.1"

        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

I am getting and error as follows:

/path/to/generated/BuildConfig.java
    Error:(14, 47) error: ';' expected
    Error:(15, 47) error: ';' expected

the generated BuildConfig.java is as follows:

public final class BuildConfig {
    public static final boolean DEBUG = Boolean.parseBoolean("true");
    public static final String APPLICATION_ID = "com.mycuteoffice.mcoapp";
    public static final String BUILD_TYPE = "debug";
    public static final String FLAVOR = "";
    public static final int VERSION_CODE = 1;
    public static final String VERSION_NAME = "1.0";
    // Fields from build type: debug
    public static final String APP_VERSION = 0.0.1;
    public static final String SERVER_URL = http://dev.mycuteoffice.com;
}

I think the APP_VERSION and SERVER_URL are not getting generated properly as being String type they do not have quotes.

I am not sure why it is being generated in such a way. Please let me know how can I resolve this issues.

Solution 1:

String type build config fields should be declared like this:

buildConfigField "String", "SERVER_URL", "\"http://dev.myserver.com\""

the field name in quotes, the field value in escaped quotes additionally.

Solution 2:

Why everybody is so mad about escaping double quotes? Looks ugly! This is Groovy, guys, you can just mix single and double quotes:

buildConfigField "String", 'SERVER_URL', '"http://dev.myserver.com"'
buildConfigField "String", 'APP_VERSION', '"0.0.1"'

Solution 3:

If by "resolving the issues" you mean not having to double quote literals, I haven't come across anything as it seems to be working as designed.

I've been experimenting with moving the literals into "gradle.properties" as a workaround, turning potentially multiple ugly lines into one ugly line.

Like so:

buildTypes {
def SERVER_URL = "SERVER_URL"
def APP_VERSION = "APP_VERSION"

def CONFIG = { k -> "\"${project.properties.get(k)}\"" }

debug {
    buildConfigField "String", SERVER_URL, CONFIG("debug.server.url")
    buildConfigField "String", APP_VERSION, CONFIG("version")
}

release {
    buildConfigField "String", SERVER_URL, CONFIG("release.server.url")
    buildConfigField "String", APP_VERSION, CONFIG("version")

    minifyEnabled false
    proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}

gradle.properties

version=0.1.1
...
debug.server.url=http://dev.myserver.com
...
release.server.url=http://myserver.com
...

Further thoughts:

def CONFIG = { b,k -> "\"${project.properties.get(b+'.'+k)}\"" }
def CONFIG_DEBUG = { k -> CONFIG('debug',k) }
def CONFIG_RELEASE = { k -> CONFIG('release',k) }

def CONFIG = { b,k -> "\"${project.properties.get(b+'.'+k)}\"" }
def CONFIG_INT = { b,k -> "${project.properties.get(b+'.'+k)}" }
...

Solution 4:

Use

 buildConfigField "String", "FILE_NAME", "\"{$fileName}\"" 

for variable. Reference from here