Android编译常见错误解决

[本文结构]

在使用Android Studio开发过程中，经常会遇到一些gradle相关的问题，本篇文章将用于收集整理这些问题，免得以后再去google。

常见问题：

构建失败，提示Could not resolve all dependencies for configuration ‘:classpath’

•   ➜  ./gradlew clean
    Parallel execution with configuration on demand is an incubating feature.
  	
    FAILURE: Build failed with an exception.
  	
    * What went wrong:
    A problem occurred configuring root project 'test'.
    > Could not resolve all dependencies for configuration ':classpath'.
       > Could not resolve com.android.tools.build:gradle:2.1.2.
         Required by:
             :test:unspecified
          > Could not resolve com.android.tools.build:gradle:2.1.2.
             > Could not get resource 'http://test.bihe0832.com/nexus/content/groups/androidbuild/com/android/tools/build/gradle/2.1.2/gradle-2.1.2.pom'.
                > Could not HEAD 'http://test.bihe0832.com/nexus/content/groups/androidbuild/com/android/tools/build/gradle/2.1.2/gradle-2.1.2.pom'.
                   > Connection to http://test.bihe0832.com refused
  	
    * Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  	
    BUILD FAILED
  	
    Total time: 1 mins 18.198 secs

• 修改项目根目录build.gradle中对于使用的maven库的声明，具体方法可以参考文章终端基于gradle的开源项目运行环境配置指引

构建失败，提示Downloading gradle Operation timed out

•   ➜  Assistant_7.0_size_reduce  ./gradlew clean
    Downloading http://test.bihe0832.com/gradle/gradle-2.10-all.zip
  	
    Exception in thread "main" java.net.ConnectException: Operation timed out
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

• 修改项目根目录gradle/wrapper/gradle-wrapper.properties中使用的gradle版本的地址，具体方法可以参考文章终端基于gradle的开源项目运行环境配置指引

构建失败，提示gc overhead limit exceeded 或者java.lang.outofmemoryerror java heap space

• 构建过程失败或者不停报错，错误提示如下：

    :module:lintVitalRelease
    Failed converting ECJ parse tree to Lombok for file *.java
    java.lang.OutOfMemoryError: Java heap space
        at lombok.ast.ListAccessor.of(ListAccessor.java:539)
        at lombok.ast.MethodInvocation.<init>(MethodInvocation.java:8)
        at lombok.ast.ecj.EcjTreeConverter$2.visitMessageSend(EcjTreeConverter.java:1041)

• 这种问题是因为构建时内存溢出了，比较容易解决，如果是使用android studio，那就在对应modele的build.gradle里面添加dexOptions：

    android {
  	
        ……
  		
        dexOptions {
            javaMaxHeapSize "4g"
            incremental true
        }
    }

  如果是使用gradlew，就在项目的build.gradle文件中添加：

    org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

  建议最好是直接按照gradle常见配置项里面关于构建速度优化提到的方式配置所有的选项。

升级gralde 插件版本以后编译报错提示使用 Java 6

• 升级gradle到高版本，例如我升级到3.3以后编译报错。然而查看File-> Project Structure -> SDK Location里面的JDK已经是1.7

    Error:Gradle 3.3 requires Java 7 or later to run. You are currently using Java 6.

• Android Studio会自己设置默认的jdk位置，默认的jdk是1.6*，1.7+，虽然修改了Project Structure，但是plist里面并没有修改。

• 解决办法：

  进入Android Studio的私有目录，需要修改/Application/Android Studio/Contents/info.plist中下面的配置：

    <key>JVMVersion</key> <string>1.6*,1.7+</string>

  例如我改为了，之后重试发现已经OK

    <key>JVMVersion</key> <string>1.7*,1.7+</string>

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