从onTabSelected方法调用sharedpreference值

Question

我正在使用操作栏标签（不建议使用）来测试某些标签功能。我想将表单验证信息从第一个选项卡保存到共享首选项，然后在onTabSelected方法上，在切换到下一个选项卡之前检查值。我目前的问题是检查tablistener类

中共享首选项中保存的值

TAB1：

import android.app.Fragment;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;



public class clientFragmentTab extends Fragment {


ArrayList<String> saleRecord;
Calendar c = Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy");
String formattedDate = df.format(c.getTime());
EditText currDate, invoiceNo , vehicle;
Spinner clientName, territory;
String spinnerValue;
ShowAlert alert;


View rootView = null;

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    rootView = inflater.inflate(R.layout.client_layout, container, false);
    return rootView;
}

public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    currDate = (EditText) rootView.findViewById(R.id.editText4);
    clientName = (Spinner) rootView.findViewById(R.id.spinner);
    invoiceNo = (EditText) rootView.findViewById(R.id.editText3);
    vehicle = (EditText) rootView.findViewById(R.id.editText6);
    territory = (Spinner) rootView.findViewById(R.id.spinner3);

    currDate.setText(formattedDate);
    List<String> list = new ArrayList<String>();
    list.add("Select Client");
    list.add("Item 2");
    list.add("Item 3");
    list.add("Item 4");
    list.add("Item 5");

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_dropdown_item , list);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    clientName.setAdapter(adapter);

    clientName.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                                   int arg2, long arg3) {
            spinnerValue = clientName.getSelectedItem().toString();
            SharedPreferences pref = getActivity().getPreferences(0);
            SharedPreferences.Editor edt = pref.edit();
            edt.putString("client_valid", spinnerValue);
            edt.commit();

        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub
            spinnerValue = "Nothing";
            SharedPreferences pref = getActivity().getPreferences(0);
            SharedPreferences.Editor edt = pref.edit();
            edt.putString("client_valid", spinnerValue);
            edt.commit();

        }
    });

}
}    

TabListener：

import android.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.view.View;



public class MyTabListener implements ActionBar.TabListener{

private Fragment fragment;




// The contructor
public MyTabListener(Fragment fragment)
{
    this.fragment = fragment;

}



// When a tab is tapped, the FragmentTransaction replaces
// the content of our main layout with the specified fragment;
// that's why we declared an id for the main layout.
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {

    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(clientFragmentTab.getActivity());
    String id = sp.getString("client_valid", "empty");

    if(tab.getPosition() == 0)
    {
        ft.replace(R.id.content, fragment);


    }
    else if(tab.getPosition() == 1)
    {
        ft.replace(R.id.content, fragment);
    }
    else if(tab.getPosition() == 2)
    {
        ft.replace(R.id.content, fragment);
    }
}

// When a tab is unselected, we have to hide it from the user's view.
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
    ft.remove(fragment);
}

// Nothing special here. Fragments already did the job.
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {

}

}