Conflict with dependency 'com.android.support:support-annotations'. Resolved versions for app (24.2

问题描述：

在studio中添加了如下的代码

[java]  view plain  copy

1. androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {  
2.        exclude group: 'com.android.support', module: 'support-annotations'  
3.    })  

报异常：

Warning:Conflict with dependency 'com.Android.support:support-annotations'. Resolved versions for app (24.2.0) and test app (23.1.1) differ. See http://g.co/androidstudio/app-test-app-conflict for details.

解决办法：

在顶层中使用这个文件

android{    
    configurations.all {
        resolutionStrategy.force 'com.android.support:support-annotations:23.1.0'
    }
}