我想传递一个ArrayList的Parcelable对象加上两个活动之间的字符串值。这是将数据添加到意图,并使其通过代码:在活动之间传递时Android Bundle是否损坏?
Intent intent = new Intent(this, DisplayLotListActivity.class);
Bundle dataBundle = new Bundle();
dataBundle.putParcelableArrayList(DisplayLotListActivity.EXTRA_LOT_ARRAY, lotList);
dataBundle.putString(EXTRA_LOT_NUMBER, lotNumber);
intent.putExtra(DisplayLotListActivity.EXTRA_DATA, dataBundle);
startActivity(intent);
这是我使用来获取数据了目标活动的意图代码:
Intent intent = getIntent();
Bundle dataBundle = intent.getBundleExtra(EXTRA_DATA);
lotList = dataBundle.getParcelableArrayList(EXTRA_LOT_ARRAY);
lotNumber = dataBundle.getString(LotInquiryActivity.EXTRA_LOT_NUMBER);
当我检查调试器时,数据结构在调用活动之前看起来正确,但是当我进入目标活动时,数据结构已损坏。具体来说ArrayList是3个元素,它仍然是3个元素,但第二个元素为null。然后在包中包含一个额外的额外元素,其中包含具有空键的缺少元素对象。我之前和之后都有调试器的图像,但由于反垃圾邮件规则,无法将它们放入帖子中。
前:http://i.stack.imgur.com/vDipq.png 后:http://i.stack.imgur.com/JqbF7.png
有我丢失的东西?无论是使用Bundle还是将ArrayList直接添加到意图中,都会发生此问题。这是在运行4.0.3的Samsung Tab 2上运行的。这也发生在4.0仿真器上。
[编辑] 这是正在使用的Parcelable对象(我刚刚离开了getter和setter方法,断底)
public class Lot implements Parcelable{
private String lotn;
private String dsc1;
private String dsc2;
private String litm;
private long itm;
private String locn;
private String mcu;
private String uom1;
private String uom2;
private BigDecimal pqav;
private BigDecimal pqoh;
private BigDecimal sqoh;
private long vend;
private String rlot;
private String ldsc;
private String lots;
private String lot1;
private String lot2;
private String lot3;
private String lotsdsc;
private XMLGregorianCalendar mmej;
private XMLGregorianCalendar ohdj;
public Lot(){
}
public Lot(Parcel source){
lotn = source.readString();
dsc1 = source.readString();
dsc2 = source.readString();
litm = source.readString();
locn = source.readString();
mcu = source.readString();
uom1 = source.readString();
uom2 = source.readString();
itm = source.readLong();
pqav = new BigDecimal(source.readString());
pqoh = new BigDecimal(source.readString());
sqoh = new BigDecimal(source.readString());
vend = source.readLong();
rlot = source.readString();
ldsc = source.readString();
lots = source.readString();
lot1 = source.readString();
lot2 = source.readString();
lot3 = source.readString();
lotsdsc = source.readString();
try{
mmej = DatatypeFactory.newInstance().newXMLGregorianCalendar(source.readString());
}catch (Exception exc){
mmej = null;
}
try{
ohdj = DatatypeFactory.newInstance().newXMLGregorianCalendar(source.readString());
}catch (Exception exc){
ohdj = null;
}
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(lotn);
dest.writeString(dsc1);
dest.writeString(dsc2);
dest.writeString(litm);
dest.writeString(locn);
dest.writeString(mcu);
dest.writeString(uom1);
dest.writeString(uom2);
dest.writeLong(itm);
if(pqav != null){
dest.writeString(pqav.toPlainString());
} else {
dest.writeString("0");
}
if(pqoh != null){
dest.writeString(pqoh.toPlainString());
} else {
dest.writeString("0");
}
if(sqoh != null){
dest.writeString(sqoh.toPlainString());
} else {
dest.writeString("0");
}
dest.writeLong(vend);
dest.writeString(rlot);
dest.writeString(ldsc);
dest.writeString(lots);
dest.writeString(lot1);
dest.writeString(lot2);
dest.writeString(lot3);
dest.writeString(lotsdsc);
if(mmej != null){
dest.writeString(mmej.toXMLFormat());
} else {
dest.writeString("");
}
if(ohdj != null){
dest.writeString(ohdj.toXMLFormat());
} else {
dest.writeString("");
}
}
/**
*
*/
public static final Parcelable.Creator<Lot> CREATOR
= new Parcelable.Creator<Lot>() {
public Lot createFromParcel(Parcel in) {
return new Lot(in);
}
public Lot[] newArray(int size) {
return new Lot[size];
}
};
如果您为Android API类交换自定义Parcelable类,例如'Rect',是否仍会发生这种情况? –
它看起来不是,我只是用一个Rect尝试了相同的代码,它按预期工作。我的自定义Parcelable对象包含Strings,Longs,BigDecimals和XMLGregorianCalendar对象。我在writeToParcel代码中将最后两种类型表示为字符串。 – Moth
您的问题可能出现在该代码中。你可以发布吗? –