SP工具类

public class SPUtils {
    private static SPUtils spUtils;
    private static Context mContext;
    private static SharedPreferences sp;
    private static String name="login";
    private static final int mode=Context.MODE_PRIVATE;
    private static SharedPreferences.Editor edit;


    public static SPUtils getInstance(){
        if (spUtils==null){
            spUtils=new SPUtils();
        }
        return spUtils;
    }

    public void init(Context mContext){
        this.mContext = mContext;
    }

    public static SharedPreferences getSp(){
        sp=mContext.getSharedPreferences(name,mode);
        return sp;
    }

    public static SharedPreferences.Editor getEdit(){
        if (sp!=null){
            edit=sp.edit();
            return edit;
        }
        return null;
    }

    public static void put(String key,Object value){
        SharedPreferences sharedPreferences = mContext.getSharedPreferences(name, mode);
        SharedPreferences.Editor edit = sharedPreferences.edit();

        if (value instanceof String){
            edit.putString(key, (String) value);
        }
        edit.commit();
    }
    

}