我已经处理过几次RecyclerView
,但是这次我制作了的
到 items
的height/width
RecyclerViewwrap_content
。此实现的情况是,每当我滚动 RecyclerView
时,其中项目的布局和值也会变得困惑。例如。布局太小,无法容纳项目的值,因此当我在 RecyclerView
上上下滚动时,值会被截断。
我知道滚动 RecyclerView
将不可避免地回收 View ,在创建 Activity 时重新使用第一个显示的布局。如果我对这个逻辑有误,请纠正我。
我希望得到一些解决方案或变通方法来解决这个问题,因为我真的很希望 RecyclerView
项目的布局能够很好地符合该值。就像 Messenger 应用程序一样,卡片 View 的大小与其内容相得益彰。我可以在不固定 View 大小的情况下实现这一点吗?
非常感谢!
编辑: 如果这可以让您更好地了解我的问题,我会在此处发布代码。
RecyclerView Adapter
public class ChatAdapter extends RecyclerView.Adapter<ChatAdapter.ViewHolder> {
private static final String TAG = ChatAdapter.class.getSimpleName();
private Context context;
ArrayList<Conversation> conversations;
Conversation conversation;
private static final int TYPE_SENDER = 1;
private static final int TYPE_RECIPIENT = 2;
// Pass in the context and users array into the constructor
public ChatAdapter(Context context, ArrayList<Conversation> conversations) {
super();
this.context = context;
this.conversations = conversations;
}
@Override
public int getItemViewType(int position) {
conversation = conversations.get(position);
if (conversation.getIsSender().equals("1")) {
return TYPE_SENDER;
} else {
return TYPE_RECIPIENT;
}
}
// Create a new ViewHolder to contain our text and image
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int position) {
ViewHolder viewHolder;
LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
switch (position) {
case TYPE_SENDER:
View v1 = inflater.inflate(R.layout.chat_item_sender, viewGroup, false);
viewHolder = new ViewHolder(v1);
break;
case TYPE_RECIPIENT:
View v2 = inflater.inflate(R.layout.chat_item_recipient, viewGroup, false);
viewHolder = new ViewHolder(v2);
break;
default:
View v = inflater.inflate(R.layout.chat_item_sender, viewGroup, false);
viewHolder = new ViewHolder(v);
}
return viewHolder;
}
// Display our text and image at the specified position in the list
@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
conversation = conversations.get(position);
// Feed the message, duration, must put in IF statement or data recycled will be buggy!
if (!conversation.getMessage().isEmpty()) {
viewHolder.message.setText(conversation.getMessage());
} else {
viewHolder.message.setTypeface(null, Typeface.ITALIC);
viewHolder.message.setText("Message not retrievable at the moment!");
}
if (!conversation.getDate().toString().isEmpty()) {
viewHolder.duration.setText(DateUtils.getRelativeDateTimeString(context,
conversation.getDate().getTime(),
DateUtils.SECOND_IN_MILLIS,
DateUtils.DAY_IN_MILLIS, 0));
} else {
viewHolder.duration.setVisibility(View.GONE);
}
}
// Get the number of items in the adapter
@Override
public int getItemCount() {
return conversations.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView message, duration;
public ViewHolder(View itemView) {
super(itemView);
message = (TextView) itemView.findViewById(R.id.chat_message);
duration = (TextView) itemView.findViewById(R.id.chat_duration);
}
}
}
chat_item_sender.xml
注意:同chat_item_recipient.xml,都是RecyclerView的item; chat_item_sender.xml 是右侧的橙色 View
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:gravity="center_vertical"
android:orientation="horizontal">
<LinearLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1">
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_marginRight="20dp"
android:layout_weight="5"
android:gravity="right|center_vertical">
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
card_view:cardBackgroundColor="@color/primary"
card_view:cardCornerRadius="10dp"
card_view:cardPreventCornerOverlap="false"
card_view:contentPadding="10dp">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<TextView
android:id="@+id/chat_message"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:textColor="@color/white"
android:text="@string/shorter_test" />
<TextView
android:id="@+id/chat_duration"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="bottom|right"
android:text="Duration"
android:textColor="@color/secondary_white_text"
android:textSize="12sp" />
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
</LinearLayout>
最佳答案
采取导致问题的 View ,对于您的情况,它是包含聊天文本的 TextView。在绑定(bind)时调用 View 的 requestLayout
方法。
viewHolder.message.requestLayout();
但请记住在您的 textView 上调用此方法,而不是在上面有 wrap_content 的布局上调用它!
关于android - RecyclerView 布局发生变化,滚动时值被截断,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35376042/