单击复选框，在ViewPager中刷新或重新加载片段

Question

我想在点击否定复选框时更改字符串值serviceName = negative，并在检查肯定复选框时更改字符串值，所以它从服务器获取动态值。

"http://172.25.xx.yy:8080/SampleRestService/rest/hello/messages/"+StaticValue.sample+"/"+ serviceName +")).get();

这里我想分别点击checkBox positive r negative时将serviceName更改为正数或负数。

错误：我正在使用ViewPager。  单击checkbox时，值不会传递给serviceName。我想刷新片段或传递值的任何其他方式

Juz我想在单击复选框时将服务的值更改为负值，但是片段没有重新加载，因为它在viewPager中，所以它仍然是serviceName = positive本身....

    package com.db.socialmedia;
    //implements OnItemSelectedListener
    public class MessageNegative extends Fragment {
    CheckBox positive_checkbox ;
    CheckBox negative_checkbox ;
    public String[] Message;
    public String[] Date;

    private Spinner  Category_spinner;
     public GraphicalView messagesview;

        public static String serviceName="positive";
        private ArrayList<String> messagesNegativeArray=null;
        private ArrayList<String> dateAndTime=null;

      public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
          View V = inflater.inflate(R.layout.messaged, container, false);

        boolean isChecked = true;
        positive_checkbox = (CheckBox)V.findViewById(R.id.layout_Message_positive_checkbox);
        negative_checkbox = (CheckBox)V.findViewById(R.id.layout_Message_negative_checkbox);

        //To make positive as default selected
            positive_checkbox.setChecked(isChecked);

        // Inorder to make single selection of check box
            positive_checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            public  void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if(isChecked){

                 positive_checkbox.setChecked(true);
                 negative_checkbox.setChecked(false);
                 Toast.makeText(getActivity(),     "positive clicked", 
                           Toast.LENGTH_LONG).show();
                }}
            });
            System.out.println("0");
            negative_checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                public  void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked){
                     positive_checkbox.setChecked(false);
                     negative_checkbox.setChecked(true);
                     Toast.makeText(getActivity(),     "negative clicked", 
                               Toast.LENGTH_LONG).show();
                }}
                }); 





            negative_checkbox.setOnClickListener(new View.OnClickListener()
            {
            public void onClick(View arg0) {
    //          MessagePositive.serviceName="neagtive";         }
            });


            positive_checkbox.setOnClickListener(new View.OnClickListener()
            {
            public void onClick(View arg0) {
    //          MessagePositive.serviceName="positive";         }
            });

            //service
            try{

                String restServiceResponse= new RestServiceManager().execute(
                        "http://172.25/SampleRestService/rest/hello/messages/"+StaticValue.sample+"/"+ serviceName +")).get();
                System.out.println(restServiceResponse);

            //positive.setText(negativeValue);
            //Toast.makeText(this, restServiceResponse, 2000).show();
            JSONObject jsonObject1 = new JSONObject(restServiceResponse);
            JSONArray jsonArray2=jsonObject1.getJSONArray("messagesStatusArray");
            messagesNegativeArray=new ArrayList<String>();
            dateAndTime=new ArrayList<String>();


            for(int messageNegative=0;messageNegative<jsonArray2.length();messageNegative++)
            {
                messagesNegativeArray.add(jsonArray2.getJSONObject(messageNegative).getString("messagesStatus"));
....
....


/------------------------------------------------------
This is my ViewPager
//--------------------------------------------------
Here MessagePositive fragment class will be called...


package com.db.socialmedia;

import java.util.List;
import java.util.Vector;
import com.db.socialmedia.R;
import com.db.socialmedia.FirstFragment;
import com.db.socialmedia.FirstFragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * * The <code>ViewPagerFragmentActivity</code> class is the fragment activity
 * hosting the ViewPager * @author mwho
 */

public class ViewPagerFragmentAOrganisation extends Fragment {
    /** maintains the pager adapter */
    private PagerAdapter mPagerAdapter;

    public static View android;
    public static ViewPager pager,pagerN;

    /*
     * (non-Javadoc) * @see
     * android.support.v4.app.FragmentActivity#onCreate(android.os.Bundle)
     */

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        android = inflater.inflate(R.layout.viewpager_layout, container, false);
        // initialsie the pager
        this.initialisePaging();
        return android;
    }

    /** * Initialise the fragments to be paged */



public  void initialisePaging() {
            List<Fragment> fragments = new Vector<Fragment>();
            //fragments.add(Fragment.instantiate(getActivity(),SAPiechartTab.class.getName()));

    fragments.add(Fragment.instantiate(getActivity  (),BarChartOrganisation.class.getName()));
    fragments.add(Fragment.instantiate(getActivit(),SentimentAnalysisOrganisation.class.getName()));
 fragments.add(Fragment.instantiate(getActivity(),MessagePositive.class.getName()));
            this.mPagerAdapter = new PagerAdapter(super.getChildFragmentManager(),
                    fragments);

            //

        pager = (ViewPager) android.findViewById(R.id.viewpager);
        pager.setAdapter(this.mPagerAdapter);

         pager = (ViewPager) android.findViewById(R.id.viewpager);
            pager.setAdapter(this.mPagerAdapter);
            }

    public void setPager(int currentPosition) {
        pager.setCurrentItem(currentPosition);
    }
}