我想知道如何根据从Firebase数据库检索的内容来决定应显示哪种布局。就像我有一个名为Status的字符串是否需要一个名为layout_status的布局一样？
答案 0 :(得分：0)
那是我的发现片段
private DatabaseReference mDatabaseRefAll;
private RecyclerView recyclerViewDiscover;
DiscoverRecyclerViewAdapter discoverRecyclerViewAdapter;
private ArrayList<Object> discoverItems = new ArrayList<>();
private ArrayList<Object> objects = new ArrayList<>();
private MainAdapter adapter;
public Discover() {
// Required empty public constructor
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final View view = inflater.inflate(R.layout.fragment_discover, container, false);
recyclerViewDiscover = (RecyclerView) view.findViewById(R.id.rcDiscover);
recyclerViewDiscover.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerViewDiscover.setHasFixedSize(true);
discoverRecyclerViewAdapter = new DiscoverRecyclerViewAdapter(getContext(), discoverItems);
// set adapter
recyclerViewDiscover.setAdapter(discoverRecyclerViewAdapter);
/*
//recyclerViewDiscover.setLayoutManager(new LinearLayoutManager(getActivity())); */
return view;
}
private void loadPost() {
// loading the posts
mDatabaseRefAll = FirebaseDatabase.getInstance().getReference("Testing");
Query queryDiscover = mDatabaseRefAll;
queryDiscover.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(@NonNull DataSnapshot dataSnapshot, String s) {
Post post = dataSnapshot.getValue(Post.class);
discoverItems.add(post);
discoverRecyclerViewAdapter.notifyDataSetChanged();
// recyclerViewDiscover.scrollToPosition( discoverItems.size() - 1);
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
我的Discover DiscoverRecyclerViewAdapter {
private Context ctx;
private ArrayList<Object> arrayListDiscoverContent;
private ArrayList<discoverModell> arraydiscoverRow;
private static final int LAYOUT_ADS = 1;
private static int LAYOUT_DISCOVERROW = 0;
private static int LAYOUT_DISCOVERCONTENT = 2;
public DiscoverRecyclerViewAdapter(Context context, ArrayList<Object> arrayListDiscoverContent) {
this.ctx = context;
this.arrayListDiscoverContent = arrayListDiscoverContent;
//this.arraydiscoverRow = arraydiscoverRow;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
ctx = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(ctx);
View view;
RecyclerView.ViewHolder holder;
switch (viewType) {
case 0:
view = inflater.inflate(R.layout.discover_by_content, parent, false);
holder = new DiscoverViewHolder(view);
break;
case 1:
view = inflater.inflate(R.layout.ad_banner_view, parent, false);
holder = new AdViewHolder(view);
break;
default:
view = inflater.inflate(R.layout.discover_by_content, parent, false);
holder = new DiscoverViewHolder(view);
break;
}
return holder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
//String type = arrayListDiscoverContent.get(position).getType();
String type = (String) arrayListDiscoverContent.get(position);
if (holder instanceof DiscoverViewHolder ) {
DiscoverViewHolder.obooks.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent booksIntent = new Intent(ctx, menu_book.class);
ctx.startActivity(booksIntent);
}
});
DiscoverViewHolder.olisticles.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent listIntent = new Intent(ctx, menu_listicle.class);
ctx.startActivity(listIntent);
}
});
DiscoverViewHolder.oinfo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent odatingIntent = new Intent(ctx, Buildinginfo.class);
ctx.startActivity(odatingIntent);
}
});
} else if (holder instanceof AdViewHolder){
DiscoverViewHolder.adsDiscoverView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(ctx, google_ads_video.class);
ctx.startActivity(intent);
}
});
} else if (holder instanceof DiscoverContentViewHolder) {
}
}
public static class DiscoverViewHolder extends RecyclerView.ViewHolder {
public static View adsDiscoverView, gotobannerview;
public static Context ctx;
public static TextView name_discover, autordiscover;
public static ImageView obooks, olisticles, oinfo;
public DiscoverViewHolder(View itemView) {
super(itemView);
this.ctx = ctx;
gotobannerview = itemView;
obooks = (ImageView) itemView.findViewById(R.id.obooks);
olisticles = (ImageView) itemView.findViewById(R.id.olisticles);
oinfo = (ImageView) itemView.findViewById(R.id.oinfo);
name_discover = itemView.findViewById(R.id.textView19);
autordiscover = itemView.findViewById(R.id.autorId);
}
}
public static class DiscoverContentViewHolder extends RecyclerView.ViewHolder {
public static Context ctx;
public static View adsDiscoverView;
public static ImageView obooks, olisticles, oinfo;
public DiscoverContentViewHolder(View itemView) {
super(itemView);
this.ctx = ctx;
}
}
public static class AdViewHolder extends RecyclerView.ViewHolder {
AdView adView;
Context context;
public AdViewHolder(View itemView) {
super(itemView);
adView = itemView.findViewById(R.id.adView2);
}
}
@Override
public int getItemCount() {
return arrayListDiscoverContent.size();
}
@Override
public int getItemViewType(int position) {
/*if (position == 0){
return LAYOUT_DISCOVERROW;
} else if (position == 1){
return LAYOUT_ADS;
}
return LAYOUT_DISCOVERCONTENT;*/
return position;
}
}