shared封装

package com.fz.test;


import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;



public class SharedUtil {

    private final String CONFIG = "user";

    private SharedUtil() {
    }

    public static SharedUtil sharedUtil;

    public static SharedUtil getInstances() {
        if (sharedUtil == null) {
            sharedUtil = new SharedUtil();
        }
        return sharedUtil;
    }


    public void saveDatad(Context context, String key, Object object) {
        SharedPreferences sp = context.getSharedPreferences(CONFIG,
                Context.MODE_PRIVATE);
        Editor edit = sp.edit();
        if (object instanceof String) {
            edit.putString(key, (String) object);

        } else if (object instanceof Boolean) {
            edit.putBoolean(key, (Boolean) object);

        } else if (object instanceof Float) {
            edit.putFloat(key, (Float) object);

        } else if (object instanceof Long) {
            edit.putLong(key, (Long) object);

        } else if (object instanceof Integer) {
            edit.putInt(key, (Integer) object);

        }

        edit.commit();

    }


    public Object getValueByKey(Context context, String keyStr, Object defValue) {
        SharedPreferences sp = context.getSharedPreferences(CONFIG,
                context.MODE_PRIVATE);
        if (defValue instanceof String) {
            return sp.getString(keyStr, (String) defValue);
        } else if (defValue instanceof Integer) {
            return sp.getInt(keyStr, (Integer) defValue);
        } else if (defValue instanceof Long) {
            return sp.getLong(keyStr, (Long) defValue);
        } else if (defValue instanceof Float) {
            return sp.getFloat(keyStr, (Float) defValue);
        } else if (defValue instanceof Boolean) {
            return sp.getBoolean(keyStr, (Boolean) defValue);
        }
        return null;
    }


    public void clearAllData(Context context) {
        SharedPreferences sp = context.getSharedPreferences(CONFIG,
                context.MODE_PRIVATE);
        Editor edit = sp.edit();
        edit.clear();
        edit.commit();
    }


    public boolean isExist(Context context, String keyStr) {
        SharedPreferences sp = context.getSharedPreferences(CONFIG,
                context.MODE_PRIVATE);
        return sp.contains(keyStr);

    }
}