BuildConfig未被正确创建(Gradle Android)

Question

我正在尝试将我们的Android应用程序转换成一个gradle构建。我有这个项目，它成功地建造了图书馆。我现在正试图为我们的不同环境创建不同的apks (dev/test/prod对于他们使用的restful服务有不同的urls )。

在搜索过程中，我觉得最好的方法是为每个环境制作不同的BuildConfig。这就是我试过的：

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']
        }
    }
}

问题是，我的BuildConfig.java似乎没有注入静态变量，因此我得到的错误类似于：

/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

我的build/source/buildConfig/debug/com/.../BuildConfig.java文件包含：

/**
 * 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;
}

我做错了什么？

Answer 1

请确保您正在构建"dev“或"prod”变体。默认的“调试”和“发布”变体中没有BuildConfig定义。在Android中，您可以在左下角选择当前变量：

​

​

为了简化build.gradle文件，您可以定义：

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

然后只使用默认的“调试”和“发布”变体。

最后，从buildConfigField参数的值中删除分号(符号：';')。

Answer 2

我有同样的问题，并修正如下：

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

Answer 3

先做

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

那就去做

Build -> Clean Project

那就去做

Build - > Rebuild Project