NoClassDefFoundError使用Jackson 2.2.x在Android上与Gradle

// build.gradle
buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.6.+'
    }
}
apply plugin: 'android'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 18
    buildToolsVersion "18.1.0"

    defaultConfig {
        minSdkVersion 8
        targetSdkVersion 18
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:18.0.0'
    compile 'com.android.support:support-v4:18.0.0'
    compile 'com.google.android.gms:play-services:3.1.36'
    compile 'com.fasterxml.jackson.core:jackson-databind:2.2.+'
    compile 'com.fasterxml.jackson.core:jackson-core:2.2.+'
    compile 'com.fasterxml.jackson.core:jackson-annotations:2.2.+'
}

我只是在这里使用ObjectMapper：

import com.fasterxml.jackson.databind.ObjectMapper;

// ...

ObjectMapper objectMapper = new ObjectMapper();
try {
    Content content = objectMapper.readValue(inputStream,Content.class);
} catch (IOException e) {
    e.printStackTrace();
}

当我运行gradle installDebug并启动应用程序的相关部分崩溃：

java.lang.NoClassDefFoundError: com.fasterxml.jackson.databind.ObjectMapper

思考：

>我注意到,在build.gradle中定义了com.fasterxml.jackson.core的错误消息中提到了com.fasterxml.jackson ….有不匹配导致问题吗？
>我把这个依赖关系块暂时移动到android块中,因为我found other build.gradle configurations这样结构化了.不过似乎没有什么区别.