Android studio 中NameValuePair跟BasicNameValuePair 不能正常导包问题
针对一个post请求，android studio中无法正常导入以下两个包：
import org.apache.http.NameValuePair; import org.apache.http.message.BasicNameValuePair;
Cannot resolve symbol NameValuePair
最后解决方案是：
在module文件中加入了
android { ... useLibrary ‘org.apache.http.legacy‘ dependencies { ... compile ‘org.apache.httpcomponents:httpcore:4.4.1‘ compile ‘org.apache.httpcomponents:httpclient:4.5‘ } }
到此问题得到解决，如果还是报错出现如下：
compile ‘org.apache.httpcomponents:httpclient:4.5.5‘
出现红色报错线并提示下列错误：
httpclient defines classes that conflict with classes now provided by Android. Solutions include finding newer versions or alternative libraries that don‘t have the same problem (for example, for httpclient use HttpUrlConnection or okhttp instead), or repackaging the library using something like jarjar. less... (Ctrl+F1)
There are a number of libraries that duplicate not just functionality of the Android platform but using the exact same class names as the ones provided in Android -- for example the apache http classes. This can lead to unexpected crashes. To solve this, you need to either find a newer version of the library which no longer has this problem, or to repackage the library (and all of its dependencies) using something like the jarjar tool, or finally, rewriting the code to use different APIs (for example, for http code, consider using HttpUrlConnection or a library like okhttp). Issue id: DuplicatePlatformClasses
解决办法：
在android中添加下列代码：
configurations { all { exclude module: ‘httpclient‘ exclude module: ‘commons-logging‘ } }
截图如下：
重新点击出错语句编译即可解决。