【Android】建立Class定義共同參數 SharedPreferences

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public class Param

{

public void setSharedPreferences(String columns, String data, Context ctxs)

    {

        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(ctxs);

        SharedPreferences.Editor editor = settings.edit();  

        editor.putString(columns, data);

        editor.commit();

    }

public String getSharedPreferences(String columns, Context ctxs)

    {

       String param="no";

       try{

            SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(ctxs);

            param=sp.getString(columns, param);

       }catch(Exception ex){}

        return param;

    }

}

==============================extends Fragment==============================

Activity mActivity;

@Override

public void onAttach(Activity activity) {

  super.onAttach(activity);

  mActivity = (Activity) activity;

}

@Override

public void onCreate(Bundle savedInstanceState) {

        Param pm = new Param();

        pm.setSharedPreferences("startDay", "20150402", mActivity);

        String startDay = pm.getSharedPreferences("startDay", mActivity);

}

==============================extends Activity==============================

@Override

public void onCreate(Bundle savedInstanceState) {

        Param pm = new Param();

        pm.setSharedPreferences("startDay", "20150402", this);

        String startDay = pm.getSharedPreferences("startDay", this);

}