问题
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?
回答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.
回答2:
I had same issue and fixed it like below:
buildConfigField 'String', 'BASE_URL', '"https://api.example.com"'
回答3:
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!
回答4:
Here is what fixed this for me:
File -> Invalidate Caches/Restart... -> Invalidate and Restart
回答5:
In the project.ext.envConfigFiles array, ensure you set the debug to the right .env file you are using for development
回答6:
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.
来源：https://stackoverflow.com/questions/20706451/buildconfig-not-getting-created-correctly-gradle-android