我想将一个Parcelable对象列表发送给一个活动,但是当从活动包中接收对象时我得到了空对象
我有一个启动活动的方法,在bundle中发送Parcelable对象列表:
public void openActivity(){
ArrayList<ReportErrorVO> reports = new ArrayList<>();
ReporteErrorVO reportError = new ReporteErrorVO();
reportError.setTituloError("Error title 1");
reportError.setDescripcionError("Error description 1");
reports.add(reportError);
reportError = new ReporteErrorVO();
reportError.setTituloError("Error title 2");
reportError.setDescripcionError("Error description 2");
reports.add(reportError);
Intent intent = new Intent(this, ReporteErrorActivity.class);
Bundle args = new Bundle();
args.putParcelableArrayList("reports", reports);
intent.putExtras(args);
startActivity(intent);
}
我的Parcelable课程:
public class ReportErrorVO implements Parcelable {
private String titleError;
private String descriptionError;
public ReportErrorVO(Parcel in) {
titleError = in.readString();
descriptionError = in.readString();
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(titleError);
dest.writeString(descriptionError);
}
public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
public ReportErrorVO createFromParcel(Parcel in) {
return new ReportErrorVO(in);
}
public ReportErrorVO[] newArray(int size) {
return new ReportErrorVO[size];
}
};
@Override
public int describeContents() {
return 0;
}
}
所谓的活动,我得到了:
@Override
protected void onCreate(Bundle savedInstanceState) {
...//Activity initializer code..
Bundle bundle = getIntent().getExtras();
ArrayList<ReportErrorVO> reports = new ArrayList<>();
try {
reports = bundle.getParcelableArrayList("reports");
}catch (Exception ex){
System.out.println(ex.getMessage());
}
}
问题在于,当我分析报告数组时,我发现当我得到size = 2时,我得到了第二个项目null(项目位置= 1)。请注意,列表中的第一个词是完美的。怎么了?
答案 0 :(得分:4)
我今天刚遇到同样的问题而且我已经通过这种方式解决了问题:
写数据:
Bundle data = new Bundle();
data.putParcelableArrayList("reports", reports);
intent.putExtra("bundle", data);
阅读数据:
Bundle data = intent.getBundleExtra("bundle");
ArrayList<ReportErrorVO> reports= data.getParcelableArrayList("reports");
希望有所帮助:)