我正在开发一个聊天应用程序。聊天消息由普通文本消息组成，有时它可以是recyclerview中的项目列表。
所以我实现了嵌套Recyclerview。那么在json响应中会发生什么，如果消息只是普通文本，则会显示textview，但消息中包含一个URL，然后显示horizantal recyclerview代替textview。
问题是，如果在json响应中，假设有10条消息，那10条消息中有4条是URL，所以我应该看到6条正常文本和4条Recyclerviews。但是嵌套的recyclerview表现得非常奇怪，有时它甚至不显示，有时我可以看到2个Recyclerviews，有时4个但是有相同的URL（相同的项目列表）。
我不知道我做错了什么。有人可以看看代码并告诉我出了什么问题吗？
我的父（垂直）Recyclerview布局
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="messageViewModel"
type="com.sukshi.sukshichat.viewmodel.MessageFragmViewModel"/>
</data>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".view.fragment.MessagesFragment">
<android.support.v7.widget.RecyclerView
android:id="@+id/rv_message"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:background="#ffffff"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:layout_marginTop="0dp"
android:layout_below="@+id/kjk"
android:layout_above="@+id/rv_message_container"
tools:listitem="@layout/test"
/>
</RelativeLayout>
</layout>
Vertical Recyclerview子布局
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<import
alias="cons"
type="com.sukshi.sukshichat.utils.ConstantsFirebase"/>
<import type="android.view.View"/>
<variable
name="messageViewModel"
type="com.sukshi.sukshichat.viewmodel.MessageAdapterViewModel"/>
</data>
<android.support.percent.PercentRelativeLayout
android:layout_height="wrap_content"
android:id="@+id/rv_container"
android:layout_width="wrap_content">
<android.support.v7.widget.RecyclerView
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="10dp"
android:id="@+id/nested_recyclerview"
>
</android.support.v7.widget.RecyclerView>
<RelativeLayout
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="4dp"
android:id="@+id/sender"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="4dp"
app:layout_widthPercent="70%">
<hani.momanii.supernova_emoji_library.Helper.EmojiconTextView
android:layout_height="wrap_content"
android:id="@+id/tv_item_message"
android:layout_width="wrap_content"
android:maxWidth="300dp"
android:textColor="#ffffff"
android:text="@{messageViewModel.message}"
android:background="@drawable/chat_sender"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:padding="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@{messageViewModel.time}"
android:layout_marginRight="4dp"
android:id="@+id/tv_item_message_time"
android:layout_alignBottom="@+id/tv_item_message"
android:layout_toLeftOf="@+id/tv_item_message"/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/iv_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:maxHeight="@dimen/item_message_max_height"
android:maxWidth="@dimen/item_message_max_width"
android:onClick="@{messageViewModel::onItemClick}"
android:scaleType="centerCrop"
android:transitionName="shared"
android:visibility="@{messageViewModel.typeMessage ? View.GONE : View.VISIBLE}"
app:mapLocation="@{messageViewModel.mapLocation}"
app:photoUrlMessage="@{messageViewModel.message}"/>
</FrameLayout>
</RelativeLayout>
<RelativeLayout
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="4dp"
android:id="@+id/reciever"
android:layout_marginBottom="4dp"
app:layout_widthPercent="70%">
<hani.momanii.supernova_emoji_library.Helper.EmojiconTextView
android:layout_height="wrap_content"
android:id="@+id/tv_item_message1"
android:layout_width="wrap_content"
android:background="@drawable/chat_recieve"
android:maxWidth="300dp"
android:textColor="#000000"
android:text="@{messageViewModel.message}"
android:padding="10dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/show_garments2"
android:text="Show Garments"
android:visibility="gone"
android:background="@drawable/chat_recieve"
android:elevation="10dp"
android:paddingLeft="10dp"
android:textColor="#000000"
style="@style/Widget.AppCompat.Button.Colored"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@{messageViewModel.time}"
android:id="@+id/tv_item_message_time11"
android:layout_marginLeft="4dp"
android:layout_alignBottom="@+id/tv_item_message1"
android:layout_toRightOf="@+id/tv_item_message1"/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/iv_image1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:maxHeight="@dimen/item_message_max_height"
android:maxWidth="@dimen/item_message_max_width"
android:onClick="@{messageViewModel::onItemClick}"
android:scaleType="centerCrop"
android:transitionName="shared"
android:visibility="@{messageViewModel.typeMessage ? View.GONE : View.VISIBLE}"
app:mapLocation="@{messageViewModel.mapLocation}"
app:photoUrlMessage="@{messageViewModel.message}"/>
</FrameLayout>
</RelativeLayout>
</android.support.percent.PercentRelativeLayout>
</layout>
Vertical Recyclerview适配器
private void initializeFirebase() {
if (valueUserListener == null) {
valueUserListener = createFirebaseUsersListeners();
}
mRefUsers = FirebaseDatabase.getInstance().getReference(ConstantsFirebase.FIREBASE_LOCATION_USERS);
mRefUsers.keepSynced(true);
mRefUsers.addValueEventListener(valueUserListener);
Query messagesRef = FirebaseDatabase.getInstance()
.getReference(ConstantsFirebase.FIREBASE_LOCATION_CHAT)
.child(mChildChatKey)
.orderByKey().limitToLast(50);
messagesRef.keepSynced(true);
attachMessagesToRecyclerView(messagesRef);
}
private void attachMessagesToRecyclerView(final Query messagesReference) {
mAdapter = new FirebaseRecyclerAdapter<Message, MessageItemHolder>(Message.class,
R.layout.test123, MessageItemHolder.class, messagesReference) {
@Override
public MessageItemHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Test123Binding adapterItemMessageBinding = DataBindingUtil.inflate(LayoutInflater
.from(parent.getContext()), viewType, parent, false);
return new MessageItemHolder(adapterItemMessageBinding);
}
@Override
protected void populateViewHolder(final MessageItemHolder viewHolder, final Message message, int position) {
int index = mUsersEmails.indexOf(message.getEmail());
if (index != -1) {
viewHolder.bindMessage(mUsers.get(index), message, MessagesFragment.this);
}
if (viewHolder.mAdapterItemMessageBinding.getMessageViewModel().isSender()){
viewHolder.mAdapterItemMessageBinding.reciever.setVisibility(View.GONE);
viewHolder.mAdapterItemMessageBinding.sender.setVisibility(View.VISIBLE);
}else {
viewHolder.mAdapterItemMessageBinding.reciever.setVisibility(View.VISIBLE);
viewHolder.mAdapterItemMessageBinding.sender.setVisibility(View.GONE);
}
String http = message.getMessage();
// if (htttpmessage != null){
if (http.contains("google") && message.getType() == 0){
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
viewHolder.mAdapterItemMessageBinding.nestedRecyclerview.setLayoutParams(params);
filterLink = message.getMessage();
ListOfdataAdapter.clear();
JSON_HTTP_CALL(filterLink);
nestedRecyclerview(viewHolder);
viewHolder.mAdapterItemMessageBinding.nestedRecyclerview.setVisibility(View.VISIBLE);
viewHolder.mAdapterItemMessageBinding.tvItemMessage1.setVisibility(View.INVISIBLE);
// filterLink = message.getFilterLink();
}else{
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(0,
0);
viewHolder.mAdapterItemMessageBinding.nestedRecyclerview.setLayoutParams(params);
viewHolder.bindMessage(mUsers.get(index), message, MessagesFragment.this);
viewHolder.mAdapterItemMessageBinding.tvItemMessage1.setVisibility(View.VISIBLE);
}
if (message.getType() == 1 || message.getType() == 2){
viewHolder.mAdapterItemMessageBinding.tvItemMessage.setVisibility(View.INVISIBLE);
}else {
viewHolder.mAdapterItemMessageBinding.tvItemMessage.setVisibility(View.VISIBLE);
}
/* viewHolder.mAdapterItemMessageBinding.showGarments2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showpDialog();
filterLink = message.getMessage();
ListOfdataAdapter.clear();
JSON_HTTP_CALL(filterLink);
}
});
*/
}
};
mFragmentMessagesBinding.rvMessage.setAdapter(mAdapter);
mFragmentMessagesBinding.rvMessage.getAdapter().registerAdapterDataObserver(
new RecyclerView.AdapterDataObserver() {
@Override public void onItemRangeInserted(int position, int itemCount) {
super.onItemRangeInserted(position, itemCount);
mFragmentMessagesBinding.rvMessage.scrollToPosition(position);
}
});
}
因此，只要下面的消息键中有URl，就会调用方法
public void JSON_HTTP_CALL(String url){
RequestOfJSonArray = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
ParseJSonResponse(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue = Volley.newRequestQueue(getActivity());
requestQueue.add(RequestOfJSonArray);
}
public void ParseJSonResponse(JSONArray array){
for(int i = 0; i<array.length(); i++) {
UploadImage GetDataAdapter2 = new UploadImage();
JSONObject json = null;
try {
hidepDialog();
json = array.getJSONObject(i);
GetDataAdapter2.setBrand_name(json.getString(Image_Name_JSON));
// Adding image title name in array to display on RecyclerView click event.
ImageTitleNameArrayListForClick.add(json.getString(Image_Name_JSON));
GetDataAdapter2.setImage(json.getString(Image_URL_JSON));
GetDataAdapter2.setGarment_price(json.getString(garment_price));
GetDataAdapter2.setGarment_name(json.getString(garment_name));
GetDataAdapter2.setImage_full(json.getString(image_full));
GetDataAdapter2.setDesc_text(json.getString(desc_text));
} catch (JSONException e) {
e.printStackTrace();
}
ListOfdataAdapter.add(GetDataAdapter2);
// showFragment();
}
}
Horizantal Recyclerview适配器
final WrapContentLinearLayoutManager linearLayoutManager = new WrapContentLinearLayoutManager(getActivity());
linearLayoutManager.setOrientation(WrapContentLinearLayoutManager.HORIZONTAL);
viewHolder.mAdapterItemMessageBinding.nestedRecyclerview.setLayoutManager(linearLayoutManager);
viewHolder.mAdapterItemMessageBinding.nestedRecyclerview.setHasFixedSize(true);
//mFragmentMessagesBinding.recyclerview1.addItemDecoration(new PaddingItemDecoration(size));
viewHolder.mAdapterItemMessageBinding.nestedRecyclerview.setItemAnimator(new DefaultItemAnimator());
DialogRecyclerViewAdapter rvAdapter = new DialogRecyclerViewAdapter(ListOfdataAdapter, getActivity());
viewHolder.mAdapterItemMessageBinding.nestedRecyclerview.setAdapter(rvAdapter);
rvAdapter.notifyDataSetChanged();
Horizantal Recyclerview适配器
public class DialogRecyclerViewAdapter extends RecyclerView.Adapter<DialogRecyclerViewAdapter.ViewHolder> {
Context context;
List<UploadImage> dataAdapters;
private SharedPreferences.Editor mSharedPrefEditor;
ImageLoader imageLoader;
public DialogRecyclerViewAdapter(List<UploadImage> getDataAdapter, Context context){
super();
this.dataAdapters = getDataAdapter;
this.context = context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardview, parent, false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder Viewholder, int position) {
final UploadImage dataAdapterOBJ = dataAdapters.get(position);
imageLoader = ImageAdapter.getInstance(context).getImageLoader();
imageLoader.get(dataAdapterOBJ.getImage(),
ImageLoader.getImageListener(
Viewholder.VollyImageView,//Server Image
R.drawable.loading_1,//Before loading server image the default showing image.
android.R.drawable.ic_dialog_alert //Error image if requested image dose not found on server.
)
);
}
@Override
public int getItemCount() {
return dataAdapters.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
public TextView ImageTitleTextView, garment_price, size;
public NetworkImageView VollyImageView ;
public ViewHolder(View itemView) {
super(itemView);
VollyImageView = (NetworkImageView) itemView.findViewById(R.id.VolleyImageView) ;
}
}
}
Vertical Recyclerview ViewHolder
public static class MessageItemHolder extends RecyclerView.ViewHolder {
private Test123Binding mAdapterItemMessageBinding;
public MessageItemHolder(Test123Binding adapterItemMessageBinding) {
super(adapterItemMessageBinding.rvContainer);
mAdapterItemMessageBinding = adapterItemMessageBinding;
}
public void bindMessage(User user, Message message, MessageAdapterViewModelContract contract) {
if (mAdapterItemMessageBinding.getMessageViewModel() == null) {
mAdapterItemMessageBinding.setMessageViewModel(new MessageAdapterViewModel(user,
encodedMail, message, contract));
} else {
mAdapterItemMessageBinding.getMessageViewModel().setUser(user);
mAdapterItemMessageBinding.getMessageViewModel().setMessage(message);
}
}
}