I try this

我想生成一些 APK(x86、armeabi-v7a)。为了减小 APK 在 Google Play 中的大小

但是它不起作用。 Android studia 说 import com.android.build.OutputFile - 无法解析符号“OutputFile”。在控制台中我看到了。我尝试在谷歌中搜索其他说明并尝试自己做一些事情，但我不擅长 gradle

错误:无法在空对象上调用 multiply() 方法

我的gradle文件是

// map for the version code

ext.versionCodes = ['armeabi-v7a':1, 'armeabi':2, 'x86':3]

import com.android.build.OutputFile

android.applicationVariants.all { variant ->
    // assign different version code for each output
    variant.outputs.each { output ->
        output.versionCodeOverride =
                project.ext.versionCodes.get(output.getFilter(OutputFile.ABI)) * 1000000 + android.defaultConfig.versionCode
    }
}

android {
    buildToolsVersion "20.0.0"
    compileSdkVersion 20
    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }


        instrumentTest.setRoot('tests')
    }
    defaultConfig {
        versionCode 11
        versionName '1.3'
    }
    productFlavors {
    }

    splits {
        abi {
            enable true
            reset()
            include 'x86', 'armeabi-v7a', 'armeabi'
            universalApk true
        }
    }





}




// needed to add JNI shared libraries to APK when compiling on CLI
tasks.withType(com.android.build.gradle.tasks.PackageApplication) { pkgTask ->
    pkgTask.jniFolders = new HashSet<File>()
    pkgTask.jniFolders.add(new File(projectDir, 'libs'))
}
// called every time gradle gets executed, takes the native dependencies of
// the natives configuration, and extracts them to the proper libs/ folders
// so they get packed with the APK.
task copyAndroidNatives() {
    file("libs/armeabi/").mkdirs();
    file("libs/armeabi-v7a/").mkdirs();
    file("libs/x86/").mkdirs();

    configurations.natives.files.each { jar ->
        def outputDir = null
        if (jar.name.endsWith("natives-armeabi-v7a.jar")) outputDir = file("libs/armeabi-v7a")
        if (jar.name.endsWith("natives-armeabi.jar")) outputDir = file("libs/armeabi")
        if (jar.name.endsWith("natives-x86.jar")) outputDir = file("libs/x86")
        if (outputDir != null) {
            copy {
                from zipTree(jar)
                into outputDir
                include "*.so"
            }
        }
    }
}
task run(type: Exec) {
    def path
    def localProperties = project.file("../local.properties")
    if (localProperties.exists()) {
        Properties properties = new Properties()
        localProperties.withInputStream { instr ->
            properties.load(instr)
        }
        def sdkDir = properties.getProperty('sdk.dir')
        if (sdkDir) {
            path = sdkDir
        } else {
            path = "$System.env.ANDROID_HOME"
        }
    } else {
        path = "$System.env.ANDROID_HOME"
    }

    def adb = path + "/platform-tools/adb"
    commandLine "$adb", 'shell', 'am', 'start', '-n', 'com.mygdx.crazyball.android/com.mygdx.crazyball.android.AndroidLauncher'
}
// sets up the Android Eclipse project, using the old Ant based build.
eclipse {
    // need to specify Java source sets explicitely, SpringSource Gradle Eclipse plugin
    // ignores any nodes added in classpath.file.withXml
    sourceSets {
        main {
            java.srcDirs "src", 'gen'
        }
    }

    jdt {
        sourceCompatibility = 1.6
        targetCompatibility = 1.6
    }

    classpath {
        plusConfigurations += [project.configurations.compile]
        containers 'com.android.ide.eclipse.adt.ANDROID_FRAMEWORK', 'com.android.ide.eclipse.adt.LIBRARIES'
    }

    project {
        name = appName + "-android"
        natures 'com.android.ide.eclipse.adt.AndroidNature'
        buildCommands.clear();
        buildCommand "com.android.ide.eclipse.adt.ResourceManagerBuilder"
        buildCommand "com.android.ide.eclipse.adt.PreCompilerBuilder"
        buildCommand "org.eclipse.jdt.core.javabuilder"
        buildCommand "com.android.ide.eclipse.adt.ApkBuilder"
    }
}
// sets up the Android Idea project, using the old Ant based build.
idea {
    module {
        sourceDirs += file("src");
        scopes = [COMPILE: [plus: [project.configurations.compile]]]

        iml {
            withXml {
                def node = it.asNode()
                def builder = NodeBuilder.newInstance();
                builder.current = node;
                builder.component(name: "FacetManager") {
                    facet(type: "android", name: "Android") {
                        configuration {
                            option(name: "UPDATE_PROPERTY_FILES", value: "true")
                        }
                    }
                }
            }
        }
    }
}
dependencies {
}

最佳答案

看起来它在尝试获取 universal APK 的 ABI 时失败了，因为在您的 versionCodes 映射中没有过滤器。在以某种方式应用乘法之前，您应该检查 output.getFilter(OutputFile.ABI) 的结果，例如:

android.applicationVariants.all { variant ->
    // assign different version code for each output
    variant.outputs.each { output ->
        def abiFilter = output.getFilter(OutputFile.ABI)
        def abiMultiplier = 0

        if (abiFilter != null) {
            abiMultiplier = project.ext.versionCodes.get(abiFilter)
        }

        output.versionCodeOverride =
            abiMultiplier * 1000000 + android.defaultConfig.versionCode
    }
}

关于android - 如何生成多个 apk(使用 gradle、libGDX)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29127393/