SharedPreferencesUtils工具类

public class SharedPreferencesUtils {
    /**
     * 保存在手机里面的文件名
     */
    private static final String FILE_NAME = "share_date";


    /**
     * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法
     * @param context
     * @param key
     * @param object
     */
    public static void setParam(Context context , String key, Object object){

        String type = object.getClass().getSimpleName();
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();

        if("String".equals(type)){
            editor.putString(key, (String)object);
        }
        else if("Integer".equals(type)){
            editor.putInt(key, (Integer)object);
        }
        else if("Boolean".equals(type)){
            editor.putBoolean(key, (Boolean)object);
        }
        else if("Float".equals(type)){
            editor.putFloat(type, (Float)object);
        }
        else if("Long".equals(type)){
            editor.putLong(type, (Long)object);
        }

        editor.commit();
    }


    /**
     * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值
     * @param context
     * @param key
     * @param defaultObject
     * @return
     */
    public static Object getParam(Context context , String key, Object defaultObject){
        String type = defaultObject.getClass().getSimpleName();
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);

        if("String".equals(type)){
            return sp.getString(key, (String)defaultObject);
        }
        else if("Integer".equals(type)){
            return sp.getInt(key, (Integer)defaultObject);
        }
        else if("Boolean".equals(type)){
            return sp.getBoolean(key, (Boolean)defaultObject);
        }
        else if("Float".equals(type)){
            return sp.getFloat(type, (Float)defaultObject);
        }
        else if("Long".equals(type)){
            return sp.getLong(type, (Long)defaultObject);
        }

        return null;
    }


}

public class SpUtils {
    private static SpUtils instance;
    private SharedPreferences sp;

    public SpUtils(){
        sp = MyApplication.context.getSharedPreferences("mksh",  Context.MODE_PRIVATE);
    }

    public static SpUtils getInstance(){
        if(instance == null){
            synchronized (SpUtils.class){
                if(instance == null){
                    instance = new SpUtils();
                }
            }
        }
        return instance;
    }

    /**
     * 设置数据
     * @param key
     * @param value
     */
    public void setValue(String key, Object value){
        SharedPreferences.Editor editor = sp.edit();
        if(value instanceof String){
            editor.putString(key, (String) value);
        }else if(value instanceof Integer){
            editor.putInt(key, (Integer) value);
        }else if(value instanceof Boolean){
            editor.putBoolean(key, (Boolean) value);
        }else if(value instanceof Float){
            editor.putFloat(key, (Float) value);
        }else if(value instanceof Long){
            editor.putLong(key, (Long) value);
        }
        editor.commit();
    }

    public String getString(String key){
        return sp.getString(key,"");
    }

    public int getInt(String key){
        return sp.getInt(key,0);
    }

    public Boolean getBoolean(String key){
        return sp.getBoolean(key,false);
    }

    public float getFloat(String key){
        return sp.getFloat(key,0);
    }

    public Long getLong(String key){
        return sp.getLong(key,0);
    }


    /**
     * 删除对应的key
     * @param key
     */
    public void remove(String key){
        sp.edit().remove(key).commit();
    }
}