我正在使用回收站适配器在帖子上显示评论。代码设置为在单击编辑文本时，以及当前用户发布新评论时，将回收者视图滚动到底部。
如果显示了键盘，并且回收者视图仍未触摸键盘（显示了2到4条评论），则该评论在发布时会崩溃。如果有很多项目（足够放在键盘下面），则recyclerview滚动并没有崩溃。
这是我的代码：
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// some code
scrollToBottom = true; // this is initially false
loadComments();
}
});
private void loadComments () {
Query query = firebaseFirestore.collection...;
FirestoreRecyclerOptions<Model> options = new FirestoreRecyclerOptions.Builder<Model>()
.setLifecycleOwner(this)
.setQuery(query, Model.class)
.build();
adapter = new Adapter(options, this);
recyclerview.setHasFixedSize(true);
recyclerview.setLayoutManager(new LinearLayoutManager(this));
recyclerview.setAdapter(adapter);
if (scrollToBottom) {
scrollToBottom = false;
scrollToTheBottom();
}
}
private void scrollToTheBottom() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
recyclerview.smoothScrollToPosition(adapter.getItemCount());
}
}, 600);
}
适配器代码：
public class Adapter extends FirestoreRecyclerAdapter<Model, Adapter.ViewHolder> {
Context context;
TimeAgo timeAgo;
public Adapter(@NonNull FirestoreRecyclerOptions<Model> options, Context context) {
super(options);
this.context = context;
}
@Override
protected void onBindViewHolder(@NonNull final ViewHolder holder, int position, @NonNull Model model) {
final String userID = model.getUser_id();
String image = model.getImage();
String username = model.getUsername();
String comment = model.getComment();
Timestamp commentTimeAgo = model.getTimestamp();
String timestampString = String.valueOf(commentTimeAgo);
String[] noOpeningParentheses = timestampString.split("\\(");
String[] noClosingParentheses = noOpeningParentheses[1].split("\\)");
String[] noCommaAndSpace = noClosingParentheses[0].split(", ");
String[] secondsFromTimestamp = noCommaAndSpace[0].split("seconds=");
String[] nanosecondsFromTimestamp = noCommaAndSpace[1].split("nanoseconds=");
long millis = TimeUnit.SECONDS.toMillis(Long.parseLong(secondsFromTimestamp[1])) + TimeUnit.NANOSECONDS.toMillis(Long.parseLong(nanosecondsFromTimestamp[1]));
// Applying
if (image.equals("default")) {
holder.userImage.setImageResource(R.mipmap.no_image);
} else {
Glide.with(context).load(image).into(holder.userImage);
}
holder.userUsername.setText(username);
holder.comment.setText(String.valueOf(comment));
holder.commentTimeAgo.setText(timeAgo.getTimeAgo(context, millis));
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.listitem, parent, false);
context = parent.getContext();
timeAgo = new TimeAgo();
return new ViewHolder(view);
}
public class ViewHolder extends RecyclerView.ViewHolder {
CircleImageView userImage;
TextView userUsername, comment, commentTimeAgo;
public ViewHolder(@NonNull View itemView) {
super(itemView);
userImage = itemView.findViewById(R.id.userimage);
userUsername = itemView.findViewById(R.id.userUsername);
comment = itemView.findViewById(R.id.comment);
commentTimeAgo = itemView.findViewById(R.id.timeago);
}
}
}
查看日志猫时，在第三行出现错误：
String timestampString = String.valueOf(timestamp);
String[] noOpeningParentheses = timestampString.split("\\(");
String[] noClosingParentheses = noOpeningParentheses[1].split("\\)"); // error here
String[] noCommaAndSpace = noClosingParentheses[0].split(", ");
String[] secondsFromTimestamp = noCommaAndSpace[0].split("seconds=");
String[] nanosecondsFromTimestamp = noCommaAndSpace[1].split("nanoseconds=");
long millis = TimeUnit.SECONDS.toMillis(Long.parseLong(secondsFromTimestamp[1])) + TimeUnit.NANOSECONDS.toMillis(Long.parseLong(nanosecondsFromTimestamp[1]));
这是我编写的用于将Firebase Firestore时间戳字段转换为毫秒的代码。
我在logcat中得到的类似于java.lang.ArrayIndexOutOfBoundsException: length=1; index=1
我不知道该如何解决。有什么帮助吗？