错误:任务执行失败':app:transformClassesWithDexForDebug'.com.android.build.api.transform.TransformException:java.lang.RuntimeException:com.android.ide.common.process.ProcessException:java.util.concurrent.ExecutionException:com.android.ide.common.process.ProcessException:org.gradle.process.internal.ExecException:处理'命令'C:\Program Files\Java\jdk1.7.0_79\bin\java.exe'' 完成非零退出值 1

Error:Execution failed for task ':app:transformClassesWithDexForDebug'. com.android.build.api.transform.TransformException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_79\bin\java.exe'' finished with non-zero exit value 1

由于很多原因，出现了上面的错误.所以我可以说明为什么会出现这个错误以及如何解决它.

The upper error occure due to lot of reason. So I can put why this error occure and how to solve it.

原因 1: 类文件名重复

解决方案:

当您将某些类文件重构为库项目时.那个时候你写了类文件的名字所以，仔细检查你没有任何重复的名字

when your refactoring of some of your class files to a library project. and that time you write name of class file So, double check that you do not have any duplicate names

原因 2:当你有很多缓存内存

解决方案:

有时如果您有很多缓存，则会出现此错误，因此请解决它.转到 File/Invalidate caches/Restart 然后选择 Invalidate and Restart 它将清理你的缓存.

Sometime if you have lot of cache memory then this error occure so solve it. go to File/Invalidate caches / Restart then select Invalidate and Restart it will clean your cache memory.

原因 3 : 当存在内部错误或使用测试版时切换回稳定版.

REASON 3 : When there is internal bug or used beta Version to Switch back to stable version.

解决方案:

解决方案很简单，转到 Build 菜单并单击 Clean Project，清理后单击 Rebuild Project.

Solution is just simple go to Build menu and click Clean Project and after cleaning click Rebuild Project.

原因 4 : 当系统内存不足时.

解决方案:

打开任务管理器并停止当时不常用的其他应用程序，以便释放空间并解决OutOfMemory.

open Task Manager and stop the other application which are not most used at that time so it will free the space and solve OutOfMemory.

原因 5: 问题是您的方法数已超过 65K.

REASON 5 : The problem is your method count has exceed from 65K.

解决方案:

打开你的项目 build.gradle 文件添加

open your Project build.gradle file add

defaultConfig {
        ...
        multiDexEnabled true
    }

并在依赖项中添加以下行.

and in dependencies add below line.

dependencies 
    {
       compile 'com.android.support:multidex:1.0.0'
    }