java - My ArrayList<NameValuePair> is showing NameValuePair can not resolve -


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can 1 give me complete code http , post request android https://wowjava.wordpress.com/2011/01/16/login-application-for-android/ . please wanted make login check server.so want make post request please me. new android developer can not resolving issue.so please me.

build.gradle (module:app):

apply plugin: 'com.android.application'  android {     compilesdkversion 23     buildtoolsversion "23.0.2"      defaultconfig {         applicationid "com.systechdigital.realtimetrackingandmonitoring"         minsdkversion 17         targetsdkversion 23         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile filetree(dir: 'libs', include: ['*.jar'])     testcompile 'junit:junit:4.12'     compile 'com.android.support:appcompat-v7:23.1.1'     compile 'com.android.support:design:23.1.1'     compile 'com.android.support:support-v4:23.1.1' }

my mainactivity:

package com.systechdigital.realtimetrackingandmonitoring; import android.content.intent; import android.os.bundle; import android.view.view; import android.support.design.widget.navigationview; import android.support.v4.view.gravitycompat; import android.support.v4.widget.drawerlayout; import android.support.v7.app.appcompatactivity; import android.view.menu; import android.view.menuitem; import android.widget.button; import android.widget.edittext; import android.widget.imageview; import org.apache.http.message.basicnamevaluepair; import org.apache.http.namevaluepair;    public class mainactivity extends appcompatactivity         implements navigationview.onnavigationitemselectedlistener {      imageview icon_image;     imageview login_image;     edittext username_edittext;     edittext password_edittext;     button remember_me_button;     button forget_password_button;     button sign_up_button;        @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          icon_image =(imageview)findviewbyid(r.id.icon_imageview_id);         login_image=(imageview)findviewbyid(r.id.imageview_login_id);         username_edittext=(edittext)findviewbyid(r.id.user_login_email_id);         password_edittext=(edittext)findviewbyid(r.id.login_password);         remember_me_button=(button)findviewbyid(r.id.remember_me_id);         forget_password_button=(button)findviewbyid(r.id.forget_password_id);         sign_up_button=(button)findviewbyid(r.id.sign_up_button_id);           login_image.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                  intent maintosignupintent=new intent(getapplicationcontext(),signupactivity.class);                 startactivity(maintosignupintent);                  arraylist<namevaluepair> postparameters = new arraylist<namevaluepair>();              }         });      }      @override     public void onbackpressed() {         drawerlayout drawer = (drawerlayout) findviewbyid(r.id.drawer_layout);         if (drawer.isdraweropen(gravitycompat.start)) {             drawer.closedrawer(gravitycompat.start);         } else {             super.onbackpressed();         }     }        @suppresswarnings("statementwithemptybody")     @override     public boolean onnavigationitemselected(menuitem item) {         // handle navigation view item clicks here.         int id = item.getitemid();          if (id == r.id.nav_camera) {             // handle camera action         } else if (id == r.id.nav_gallery) {          } else if (id == r.id.nav_slideshow) {          } else if (id == r.id.nav_manage) {          } else if (id == r.id.nav_share) {          } else if (id == r.id.nav_send) {          }          drawerlayout drawer = (drawerlayout) findviewbyid(r.id.drawer_layout);         drawer.closedrawer(gravitycompat.start);         return true;     } } 

arraylist<namevaluepair> postparameters = new arraylist<namevaluepair>();

this wrong declaration, instead of namevaluepair suppose giving datatype of arraylist containing element such 

arraylist<string> postparameters = new arraylist<string>();

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