SharedPreferences保存对象工具类

2023年11月30日 188次阅读 来源: 第4个苹果

 1.保存到首选项

public void saveData(Object object) {
SharedPreferences preferences = getSharedPreferences("losecapture",
Context.MODE_PRIVATE);
//创建字节输出流
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
//创建对象输出流，并封装字节流
ObjectOutputStream oos = new ObjectOutputStream(baos);
//将对象写入字节流
oos.writeObject(object);
//将字节流编码成base64的字符窜
String productBase64 = new String(Base64.encodeBase64(baos
.toByteArray()));
Editor editor = preferences.edit();
editor.putString("datas", productBase64);
editor.commit();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


Log.i("ok", "存储成功");
}

 2. 读取首选项内容

public Object readData() {
Object object=null;
SharedPreferences preferences = getSharedPreferences("losecapture",
Context.MODE_PRIVATE);
String productBase64 = preferences.getString("datas", null);
if(productBase64==null){
losedata=new ArrayList<CaptureRecord>();
}else{
//读取字节
byte[] base64 = Base64.decodeBase64(productBase64.getBytes());
//封装到字节流
ByteArrayInputStream bais = new ByteArrayInputStream(base64);
try {
//再次封装
ObjectInputStream bis = new ObjectInputStream(bais);
try {
//读取对象
object=  bis.readObject();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (StreamCorruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return object;
}

 下面的附件为需要的jar包

http://download.csdn.net/detail/u012483116/9468387

    原文作者：第4个苹果
    原文地址: https://blog.csdn.net/u012483116/article/details/50948067
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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