两个水平的RecyclerView不会同时显示。第一个Horizontal RecyclerView可以正常工作，但是Sencond Horizontal RecyclerView无法正常工作。当我每次都要输入第四个项目时，它会给我一个NullPointException和应用程序直接崩溃。如果我没有设置图片，只需设置文本，同样有这个问题。
抱歉，我的英语和Android非常差。
垂直RecyclerView适配器
public class JingAdapter extends RecyclerView.Adapter<JingAdapter.HeiHei> {
private Context context;
private List<JingBean.ItemListBean> list;
private String type;
private final Typeface typeface;
private ScollAdapter adapter;
public JingAdapter(Context context) {
this.context = context.getApplicationContext();
list = new ArrayList<>();
typeface = Typeface.createFromAsset(context.getAssets(), "Lobster-1.4.otf");
}
@Override
public HeiHei onCreateViewHolder(ViewGroup parent, int viewType) {
View view = null;
switch (viewType) {
case 1:
view = LayoutInflater.from(context).inflate(R.layout.item_jing_header,parent,false);
break;
case 2:
view = LayoutInflater.from(context).inflate(R.layout.itme_jing,parent,false);
break;
case 3:
view = LayoutInflater.from(context).inflate(R.layout.item_other,parent,false);
break;
case 4:
view = LayoutInflater.from(context).inflate(R.layout.item_many,parent,false);
break;
}
return new HeiHei(view);
}
@Override
public void onBindViewHolder(HeiHei holder, int position) {
if (position == 0) {
holder.headerDate.setTypeface(typeface);
holder.headerDate.setText(DateUtile.getInstance().getDate());
}else {
JingBean.ItemListBean bean = list.get(position-1);
String type = bean.getType();
if ("video".equals(type)){
holder.title.setText(bean.getData().getTitle());
holder.img.setImageURI(bean.getData().getCover().getFeed());
}else if ("banner".equals(type)){
holder.img.setImageURI(bean.getData().getImage());
}else if ("horizontalScrollCard".equals(type)){
holder.img.setImageURI(bean.getData().getItemList().get(0).getData().getImage());
}else if ("textCard".equals(type)){
holder.otherTitle.setText(bean.getData().getText());
if ("header1".equals(bean.getData().getType())){
holder.bt.setVisibility(View.GONE);
}
}else if ("videoCollectionWithCover".equals(type) || "videoCollectionOfFollow".equals(type)){
holder.manyImg.setImageURI(bean.getData().getHeader().getCover());
adapter = new ScollAdapter(context, bean.getData().getItemList());
holder.manyList.setAdapter(adapter);
}
}
}
@Override
public int getItemViewType(int position) {
if(position >= 1){
type = list.get(position-1).getType();
if ("video".equals(type) || "banner".equals(type) || "horizontalScrollCard".equals(type)){
return 2;
}else if ("textCard".equals(type)){
return 3;
}else if ("videoCollectionWithCover".equals(type) || "videoCollectionOfFollow".equals(type)){
return 4;
}
}
return 1;
}
@Override
public int getItemCount() {
return list.size()+1;
}
public class HeiHei extends RecyclerView.ViewHolder{
private final TextView title;
private final TextView headerDate;
private final TextView otherTitle;
private final SimpleDraweeView img;
private final SimpleDraweeView manyImg;
private final ImageView bt;
private final RecyclerView manyList;
public HeiHei(View itemView) {
super(itemView);
title = (TextView)itemView.findViewById(R.id.jing_title);
otherTitle = (TextView)itemView.findViewById(R.id.other_title);
headerDate = (TextView)itemView.findViewById(R.id.header_date);
img = (SimpleDraweeView)itemView.findViewById(R.id.jing_img);
manyImg = (SimpleDraweeView)itemView.findViewById(R.id.many_img);
bt = (ImageView)itemView.findViewById(R.id.other_bt);
manyList = (RecyclerView)itemView.findViewById(R.id.many_list);
if (manyList != null){
manyList.setLayoutManager(new LinearLayoutManager(context,LinearLayoutManager.HORIZONTAL,false));
manyList.setAdapter(null);
}
}
}
public void addAll(JingBean.ItemListBean jingList){
list.add(jingList);
notifyDataSetChanged();
}
}
水平RecyclerView适配器：
public class ScollAdapter extends RecyclerView.Adapter<ScollAdapter.ScollHolder> {
private List<JingBean.ItemListBean.DataBean.ItemListBeanX> list;
private Context context;
public ScollAdapter(Context context,List<JingBean.ItemListBean.DataBean.ItemListBeanX> list) {
this.list = list;
this.context = context.getApplicationContext();
}
@Override
public ScollHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view;
if (viewType == 1){
view = LayoutInflater.from(context).inflate(R.layout.item_scoll, parent, false);
}else {
view = LayoutInflater.from(context).inflate(R.layout.item_last,parent,false);
}
return new ScollHolder(view);
}
@Override
public void onBindViewHolder(ScollHolder holder, int position) {
JingBean.ItemListBean.DataBean.ItemListBeanX.DataBeanX dataBeanX = list.get(position).getData();
if ("ActionCard".equals(dataBeanX.getDataType())){
holder.more.setText(dataBeanX.getText());
}else {
holder.img.setImageURI(Uri.parse(dataBeanX.getCover().getFeed()));
holder.title.setText(dataBeanX.getTitle());
holder.catagory.setText(dataBeanX.getCategory()+dataBeanX.getDuration());
}
}
@Override
public int getItemViewType(int position) {
if (position == list.size()-1){
return 2;
}
return 1;
}
@Override
public int getItemCount() {
return list.size();
}
public class ScollHolder extends RecyclerView.ViewHolder{
private final SimpleDraweeView img;
private final TextView title;
private final TextView catagory;
private final TextView more;
public ScollHolder(View itemView) {
super(itemView);
img = (SimpleDraweeView)itemView.findViewById(R.id.scoll_img);
title = (TextView)itemView.findViewById(R.id.scoll_title);
catagory = (TextView)itemView.findViewById(R.id.scoll_class);
more = (TextView)itemView.findViewById(R.id.scoll_more);
}
}
}
错误讯息：
AndroidRuntime: FATAL EXCEPTION: main
Process: poul.com.kaiyan, PID: 16949
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.facebook.drawee.view.SimpleDraweeView.setImageURI(android.net.Uri)' on a null object reference
at poul.com.kaiyan.kai_adapter.ScollAdapter.onBindViewHolder(ScollAdapter.java:50)
at poul.com.kaiyan.kai_adapter.ScollAdapter.onBindViewHolder(ScollAdapter.java:24)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6308)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6341)
at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5287)
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5550)
at android.support.v7.widget.GapWorker.prefetchPositionWithDeadline(GapWorker.java:270)
at android.support.v7.widget.GapWorker.flushTaskWithDeadline(GapWorker.java:324)
at android.support.v7.widget.GapWorker.flushTasksWithDeadline(GapWorker.java:337)
at android.support.v7.widget.GapWorker.prefetch(GapWorker.java:344)
at android.support.v7.widget.GapWorker.run(GapWorker.java:370)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5562)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:968)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:763)