我在一项活动中正在使用Recyclerview，但无法在recyclerView中显示任何数据。
anonymous()
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="56dp"
android:background="@color/colorPrimary"
android:id="@+id/toolBar">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_back_light"
android:layout_gravity="center"
android:layout_marginStart="16dp"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Sushi"
android:textColor="@color/white"
android:textStyle="bold"
android:layout_gravity="center"
android:layout_marginStart="12dp"
android:textSize="18sp"/>
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/chatMessages"
android:clipToPadding="false"
android:paddingBottom="4dp"
android:paddingTop="4dp"
android:layout_below="@+id/toolBar"
android:layout_above="@+id/messageInputView"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:paddingStart="12dp"
android:paddingEnd="12dp"
android:id="@+id/messageInputView">
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:paddingStart="12dp"
android:paddingEnd="12dp"
android:background="#D9D9D9"
android:id="@+id/border"
android:layout_alignParentTop="true"/>
<EditText
android:id="@+id/messageInput"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:background="@color/transparent"
android:layout_toLeftOf="@+id/messageSendButton"
android:hint="Type a message..."
android:textColorHint="#80282a2b"
android:inputType="textAutoCorrect|textAutoComplete|textMultiLine|textCapSentences"/>
<ImageView
android:id="@+id/messageSendButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:src="@drawable/ic_send"
android:onClick="onClick"
android:padding="4dp"
android:layout_marginTop="12dp"
android:layout_marginBottom="12dp"
android:background="@drawable/send_message_background"/>
</RelativeLayout>
</RelativeLayout>
的所有回调方法都不会在调用RecyclerView.Adapter<RecyclerView.ViewHolder>时调用。
此处是适配器代码：
notifydatasetchanged()用于初始化recyclerView的代码：
public class ChatMessagesAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static String TAG = "ChatMessagesAdapter";
private ArrayList<ChatMessages> mChatMessages;
private Context mContext;
public ChatMessagesAdapter(ArrayList<ChatMessages> chatMessages, Context context){
mContext = context.getApplicationContext();
mChatMessages = chatMessages;
Log.d("ChatActivity Adapter", String.valueOf(mChatMessages.size()));
setHasStableIds(true);
}
public synchronized void refreshData(ArrayList<ChatMessages> feeds){
Log.d("ChatActivity Adapter", String.valueOf(feeds.size()));
mChatMessages.clear();
mChatMessages.addAll(feeds);
Log.d("ChatActivity Adapter", String.valueOf(mChatMessages.size()));
notifyDataSetChanged();
}
class IncomingMessageHolder extends RecyclerView.ViewHolder {
@BindView(R.id.messageText) TextView mMessageText;
@BindView(R.id.messageTime) TextView mMessageTime;
IncomingMessageHolder(View itemView) {
super(itemView);
ButterKnife.bind(this,itemView);
}
}
class OutgoingMessageHolder extends RecyclerView.ViewHolder {
@BindView(R.id.messageText) TextView mMessageText;
@BindView(R.id.messageTime) TextView mMessageTime;
OutgoingMessageHolder(View itemView) {
super(itemView);
ButterKnife.bind(this,itemView);
}
}
@Override
public int getItemViewType(int position) {
Log.d("ChatActivity Adapter","getItemViewType "+mChatMessages.get(position).getMessageStatus());
if (mChatMessages.get(position).getMessageStatus() == 2){
return 1;
} else {
return 0;
}
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
Log.d("ChatActivity Adapter","onCreateViewHolder");
switch (viewType){
case 0 :
View outgoingMessageView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_outcoming_text_message,parent,false);
return new OutgoingMessageHolder(outgoingMessageView);
default :
View incomingMessageView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_incoming_text_message, parent, false);
return new IncomingMessageHolder(incomingMessageView);
}
}
@Override
public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder holder, int position) {
Log.d("ChatActivity Adapter","onBindViewHolder");
switch (holder.getItemViewType()){
case 0:
OutgoingMessageHolder outgoingMessageHolder = (OutgoingMessageHolder) holder;
outgoingMessageHolder.mMessageText.setText(mChatMessages.get(position).getMessage());
outgoingMessageHolder.mMessageTime.setText(
UtilsFuntions.getDurationString(mChatMessages.get(position).getTimeStamp())
);
break;
case 1:
IncomingMessageHolder incomingMessageHolder = (IncomingMessageHolder) holder;
incomingMessageHolder.mMessageText.setText(mChatMessages.get(position).getMessage());
incomingMessageHolder.mMessageTime.setText(
UtilsFuntions.getDurationString(mChatMessages.get(position).getTimeStamp())
);
break;
}
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getItemCount() {
Log.d("ChatActivity Adapter", String.valueOf(mChatMessages.size()));
return mChatMessages.size();
}
}
但是，甚至当我触摸recyclerview或尝试滚动recyclerview时，所有调用的回调都将被填充，并且recyclerview被填充。我不知道为什么会这样。请帮我解决这个问题