Question

在我试图将spring添加到android应用程序时遇到异常。此代码段来自http://projects.spring.io/spring-android/

import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestTemplate;

public class Test {
    public static void main(String[] args){
        String url = "https://ajax.googleapis.com/ajax/" +
                "services/search/web?v=1.0&q={query}";

// Create a new RestTemplate instance
        RestTemplate restTemplate = new RestTemplate();

// Add the String message converter
        restTemplate.getMessageConverters().add(new StringHttpMessageConverter());

// Make the HTTP GET request, marshaling the response to a String
        String result = restTemplate.getForObject(url, String.class, "Android");
        System.out.println(result);
    }
}

当上面的代码运行时：

> Exception in thread "main" java.lang.NoClassDefFoundError:
> android/os/Build$VERSION  at
> org.springframework.http.client.support.HttpAccessor.<init>(HttpAccessor.java:52)
>   at
> org.springframework.http.client.support.InterceptingHttpAccessor.<init>(InterceptingHttpAccessor.java:35)
>   at
> org.springframework.web.client.RestTemplate.<init>(RestTemplate.java:169)
>   at
> org.springframework.web.client.RestTemplate.<init>(RestTemplate.java:158)
>   at com.hustler.kfg.spring.Test.main(Test.java:15) Caused by:
> java.lang.ClassNotFoundException: android.os.Build$VERSION    at
> java.net.URLClassLoader$1.run(URLClassLoader.java:366)    at
> java.net.URLClassLoader$1.run(URLClassLoader.java:355)    at
> java.security.AccessController.doPrivileged(Native Method)    at
> java.net.URLClassLoader.findClass(URLClassLoader.java:354)    at
> java.lang.ClassLoader.loadClass(ClassLoader.java:423)     at
> sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)     at
> java.lang.ClassLoader.loadClass(ClassLoader.java:356)     ... 5 more

配置文件：

常见：

buildscript {
    repositories {
        mavenCentral()
        mavenLocal()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.10+'
    }
}

allprojects {
    apply plugin: "eclipse"
    apply plugin: "idea"

    version = '1.0'
    ext {
        appName = 'kfg'
        gdxVersion = '1.2.0'
        roboVMVersion = '0.0.14'
    }

    repositories {
        mavenLocal()
        mavenCentral()
        maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
        maven { url "https://oss.sonatype.org/content/repositories/releases/" }
        maven { url 'http://repo.spring.io/libs-release' }
    }
}

project(":desktop") {
    apply plugin: "java"


    dependencies {
        compile project(":core")
        compile "com.badlogicgames.gdx:gdx-backend-lwjgl:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-desktop"
    }
}

project(":android") {
    apply plugin: "android"

    configurations { natives }

    dependencies {
        compile project(":core")
        compile "com.badlogicgames.gdx:gdx-backend-android:$gdxVersion"
        natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi"
        natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi-v7a"
        natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86"
    }
}

project(":core") {
    apply plugin: "java"


    dependencies {
        compile "com.badlogicgames.gdx:gdx:$gdxVersion"
        compile 'org.springframework.android:spring-android-rest-template:1.0.1.RELEASE'
        compile 'org.codehaus.jackson:jackson-mapper-asl:1.9.11'
    }
}

tasks.eclipse.doLast {
    delete ".project"
}

模块android：

android {
    buildToolsVersion '19.1.0'
    compileSdkVersion 19
    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }

        instrumentTest.setRoot('tests')
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES.txt'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/dependencies.txt'
        exclude 'META-INF/LGPL2.1'
        exclude 'META-INF/ASL2.0'
    }
}
// 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.example.android/com.example.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 {
}

Answer 1

看起来是因为我试图从桌面模块运行代码，其中android包无法访问。将此代码移动到Android软件包并在手机上运行它帮助了我。

java.lang.NoClassDefFoundError：android / os / Build $ VERSION

1 个答案: