结论:
查看Android源代码, Intent 的Parcel 接口代码,也未能找出问题所在.
如下是我的测试代码 :
非持久化测试代码:
final Intent intent = new Intent("cn.eben.bookshelf.VIEW");
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
//
序列化前 Intent 内存
Intent { act=cn.eben.bookshelf.VIEW flg=0x10000000 }
Parcel parcel = Parcel.obtain();
intent.writeToParcel(parcel, 0);
byte[] data = parcel.marshall();
Parcel readParcel = Parcel.obtain();
readParcel.unmarshall(data, 0, data.length);
Intent readIntent = Intent.CREATOR.createFromParcel(readParcel);
// readIntent 内存状态, Intent 反序列化失败.
Intent { (has extras) }
null
null
null
null
null
Bundle[mParcelledData.dataSize=0]
0
null
null
null
null
context.startActivity(readIntent);// Activite 无法启动, Intent 无效
// 持久化测试代码 与内存状态
调试中,查看内存状态:
final Intent intent = new Intent("cn.eben.bookshelf.VIEW");
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
查看内存:
序列化前 Intent 内存
Intent { act=cn.eben.bookshelf.VIEW flg=0x10000000 }
Parcel parcel = Parcel.obtain();
intent.writeToParcel(parcel, 0);
byte[] data = parcel.marshall();
// 查看Data内存如下:
[22, 0, 0, 0, 99, 0, 110, 0, 46, 0, 101, 0, 98, 0, 101, 0, 110, 0, 46, 0, 98, 0, 111, 0, 111, 0, 107, 0, 115, 0, 104, 0, 101, 0, 108, 0, 102, 0, 46, 0, 86, 0, 73, 0, 69, 0, 87, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, 0, 0, 0, 16, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1]
cv.put("intent", data); //将parcel对持久化.
///读取
byte[] data = cursor.getBlob(cursor.getColumnIndex("intent"));
//查看读取到的 Data内存如下: 与写入的相同.
[22, 0, 0, 0, 99, 0, 110, 0, 46, 0, 101, 0, 98, 0, 101, 0, 110, 0, 46, 0, 98, 0, 111, 0, 111, 0, 107, 0, 115, 0, 104, 0, 101, 0, 108, 0, 102, 0, 46, 0, 86, 0, 73, 0, 69, 0, 87, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, 0, 0, 0, 16, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1]
if (null != data && 1 < data.length) {
Intent intent = null;
Parcel parcel = Parcel.obtain();
// 进行反序列化:
parcel.unmarshall(data, 0, data.length);
intent = Intent.CREATOR.createFromParcel(parcel);
// intent 内存状态, Intent 反序列化失败.
Intent { (has extras) }
null
null
null
null
null
Bundle[mParcelledData.dataSize=0]
0
null
null
null
null
}
查看Android Intnet 源代码:
看不出来有什么异常