从Parcelable类读写java.util.Date [英] Reading and writing java.util.Date from Parcelable class

问题描述

我正在使用Parcelable类.如何在此类中读写 java.util.Date 对象?

I'm working with Parcelable class. How can I read and write java.util.Date object to and from this class?

推荐答案

使用

Use writeSerializable where Date is Serializable. (But not a good idea. See below for another better way)

@Override
public void writeToParcel(Parcel out, int flags) {
   // Write object
   out.writeSerializable(date_object);

}

private void readFromParcel(Parcel in) {
   // Read object
    date_object = (java.util.Date) in.readSerializable();

}

---

但是序列化操作会消耗很多性能.如何克服这个吗?

But Serializing operations consume much performance. How can overcome this?

所以更好的用法是在编写时将日期转换为Long，然后读取Long并传递给Date构造函数以获取Date.参见下面的代码

   @Override
    public void writeToParcel(Parcel out, int flags) {
       // Write long value of Date
       out.writeLong(date_object.getTime());

    }

    private void readFromParcel(Parcel in) {
       // Read Long value and convert to date
        date_object = new Date(in.readLong());

    }

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