我正在尝试在TextView上显示Firestore的时间戳。 我使用转换器将时间戳转换为较长时间。
long millisecond = question_list.get(position).getTime_stamp().getTime();
String dateString = new SimpleDateFormat("MM/dd/yyyy").format(new Date(millisecond)).toString();
holder.setTime(dateString);
但是它给了我致命的致命主体：
java.lang.RuntimeException: Could not deserialize object. Failed to convert value of type java.lang.String to Date (found in field 'time_stamp')
at com.google.android.gms.internal.zzevb.zzb(Unknown Source:79)
at com.google.android.gms.internal.zzevb.zza(Unknown Source:719)
at com.google.android.gms.internal.zzevb.zza(Unknown Source:355)
at com.google.android.gms.internal.zzevb.zzb(Unknown Source:0)
at com.google.android.gms.internal.zzevb$zza.zza(Unknown Source:139)
at com.google.android.gms.internal.zzevb.zza(Unknown Source:1025)
at com.google.android.gms.internal.zzevb.zza(Unknown Source:2)
at com.google.firebase.firestore.DocumentSnapshot.toObject(Unknown Source:10)
at com.example.dell.step.QuestionsFragment$1.onEvent(QuestionsFragment.java:81)
at com.example.dell.step.QuestionsFragment$1.onEvent(QuestionsFragment.java:72)
at com.google.firebase.firestore.zzi.onEvent(Unknown Source:17)
at com.google.android.gms.internal.zzevc.zza(Unknown Source:6)
at com.google.android.gms.internal.zzevd.run(Unknown Source:6)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
QuestionsFragment.java:81是这个
for (DocumentChange doc : documentSnapshots.getDocumentChanges()) {
if (doc.getType() == DocumentChange.Type.ADDED) {
QuestionPost questionPost = doc.getDocument().toObject(QuestionPost.class);
question_list.add(questionPost);
questionRecyclerAdapter.notifyDataSetChanged();
}
}
和QuestionsFragment.java:72是这个
firebaseFirestore.collection("questions").addSnapshotListener(new EventListener<QuerySnapshot>() {
@Override
public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
for (DocumentChange doc : documentSnapshots.getDocumentChanges()) {
if (doc.getType() == DocumentChange.Type.ADDED) {
QuestionPost questionPost = doc.getDocument().toObject(QuestionPost.class);
question_list.add(questionPost);
questionRecyclerAdapter.notifyDataSetChanged();
}
}
答案 0 :(得分：0)
您可以通过这种方式隐藏时间戳。
long millisecond = question_list.get(position).getTime_stamp().getTime();
SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy"); // your date format
StringBuilder dateString= new StringBuilder(dateFormat.format(millisecond ));
holder.setTime(dateString);