android6.0SDK中删除HttpClient的相关类的解

Android Studio在相应的module下的build.gradle中加入：android {useLibrary 'org.apache.http.legacy'}
混淆处理：
#不混淆android-async-http
-keep class com.loopj.android.http.{;}
#不混淆org.apache.http.legacy.jar
-dontwarn android.net.compatibility.*
-dontwarn android.net.http.**
-dontwarn com.android.internal.http.multipart.**
-dontwarn org.apache.commons.**
-dontwarn org.apache.http.**
-keep class android.net.compatibility.{;}
-keep class android.net.http.{;}
-keep class com.android.internal.http.multipart.{;}
-keep class org.apache.commons.{;}
-keep class org.apache.http.*{;}