android 添加依赖出现Failed to resolve:"你添加的依赖名" 或者出现 debug@Compileclasspath问题...

Error:Unable to resolve dependency for ':app@debug/compileClasspath': Could not download okhttp.jar (com.squareup.okhttp3:okhttp:3.9.0)

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解决方案：在整个工程的build.gradle中添加以下框内框内代码：

为了大家复制方便直接贴下添加的代码：

allprojects{

    repositories{

        jcenter()

        maven {

url"https://jitpack.io"

        }

    }

}

后来在app下的build.gradle  android{}中添加：

aaptOptions{cruncherEnabled =false   

 useNewCruncher =false}

ok了