我一直在尝试使用 Fragments
作为我的 RecyclerView
child ,但没有成功。
我要做的是从我的 Firebase 数据库
和其中的每一项加载自定义 POJO
类的一些 ArrayList
具有要显示为页眉和主要内容的内容。
为此,我创建了一个可折叠布局,用户首先会看到页眉布局,然后在布局中单击所需的子项时,他们会看到主要内容。
Header 布局 是一个简单的ConstraintLayout
,因此将数据绑定(bind)到 View 没有问题。但是我的 Content layout 是一个 ViewPager
加上 TabLayout
来承载三个 Fragments
,它们的数据来自 ArrayList
从 Firebase
获取。
我的问题在于只有第一个 child 的 Fragments
在 onClick
事件中显示数据,而其余的则没有。
这是我的RecyclerView 适配器
:
public class OrdersAdapter extends RecyclerView.Adapter<OrdersAdapter.viewHolder> {
public static boolean canScroll;
public static String image;
public static String message;
private static boolean isUser;
private static int scrollTo;
private static List<Order> beanOrders;
private FragmentManager fragmentManager;
public OrdersAdapter(List<Order> beanOrders, FragmentManager fragmentManager) {
OrdersAdapter.beanOrders = beanOrders;
this.fragmentManager = fragmentManager;
}
@NonNull
@Override
public viewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
return new viewHolder(new FoldableLayout(parent.getContext()));
}
@Override
public void onBindViewHolder(@NonNull final viewHolder holder, int i) {
ArrayList<String> location = beanOrders.get(i).getLocation();
String county = location.get(0);
String consti = location.get(1);
String ward = location.get(2);
String estate = location.get(3);
String apartm = location.get(4);
if (beanOrders.get(i).isTaken()) {
holder.flHolder.setBackground(holder.itemView.getContext().getResources().getDrawable(R.drawable.vector_free));
} else if (beanOrders.get(i).isDelivered()) {
holder.flHolder.setBackground(holder.itemView.getContext().getResources().getDrawable(R.drawable.vector_delid));
}
holder.tvWorth.setText(String.format("Ksh %s", beanOrders.get(i).getsWorth()));
holder.tvNumber.setText(beanOrders.get(i).getsPhone());
holder.tvUserName.setText(beanOrders.get(i).getsName());
holder.tvCouConWard.setText(String.format("%s , %s , %s", county, consti, ward));
holder.tvEstApart.setText(String.format("%s , %s", estate, apartm));
}
@Override
public int getItemCount() {
return (null != beanOrders ? beanOrders.size() : 0);
}
private void setUpData(viewHolder holder, String image, String message) {
setUpViewPager(holder.vpAdmin, image, message, fragmentManager);
holder.tbAdmin.setupWithViewPager(holder.vpAdmin);
holder.vpAdmin.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int i, float v, int i1) {
}
@Override
public void onPageSelected(int i) {
isUser = i == 2;
if (i == 2) {
holder.fabClose.setImageResource(R.drawable.vector_eraser);
} else holder.fabClose.setImageResource(R.drawable.vector_fold);
}
@Override
public void onPageScrollStateChanged(int i) {
}
});
}
private void setUpViewPager(HViewPager viewPager, String image, String message, FragmentManager fragmentManager) {
FragmentsAdapter fragmentsAdapter = new FragmentsAdapter(fragmentManager);
Image fragmentImage = Image.newInstance(image);
Message fragmentMessage = Message.newInstance(message);
fragmentsAdapter.addFragment(new Image(), "Image");
fragmentsAdapter.addFragment(new Message(), "Confirmation");
fragmentsAdapter.addFragment(new Delivery(), "Delivery");
viewPager.setAdapter(fragmentsAdapter);
viewPager.setPagingEnabled(false);
}
class viewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener {
FoldableLayout flAdmin;
@BindView(R.id.tbAdmin)
TabLayout tbAdmin;
@BindView(R.id.vpAdmin)
HViewPager vpAdmin;
@BindView(R.id.fabClose)
FloatingActionButton fabClose;
@BindView(R.id.tvUserName)
AppCompatTextView tvUserName;
@BindView(R.id.tvNumber)
AppCompatTextView tvNumber;
@BindView(R.id.tvWorth)
AppCompatTextView tvWorth;
@BindView(R.id.tvCouConWard)
AppCompatTextView tvCouConWard;
@BindView(R.id.tvEstApart)
AppCompatTextView tvEstApart;
@BindView(R.id.tvLoyalty)
AppCompatTextView tvLoyalty;
@BindView(R.id.tvPoints)
AppCompatTextView tvPoints;
@BindView(R.id.flHolder)
FrameLayout flHolder;
viewHolder(FoldableLayout foldableLayout) {
super(foldableLayout);
flAdmin = foldableLayout;
foldableLayout.setupViews(R.layout.layout_c_header, R.layout.layout_c_content, R.dimen.cover_height, itemView.getContext());
ButterKnife.bind(this, foldableLayout);
vpAdmin.setPagingEnabled(false);
canScroll = true;
fabClose.setOnClickListener(this);
flAdmin.setOnClickListener((View v) -> {
image = beanOrders.get(getLayoutPosition()).getsImage();
message = beanOrders.get(getLayoutPosition()).getsMessage();
setUpData(this, image, message);
tbAdmin.setupWithViewPager(vpAdmin);
//Toast.makeText(itemView.getContext(), beanOrders.get(getLayoutPosition()).getsMessage(), Toast.LENGTH_SHORT).show();
new Handler().postDelayed(() -> canScroll = false, 1000);
Intent intent = new Intent(ConstHelper.START_SCROLL);
intent.putExtra(ConstHelper.SMOOTH_SCROLL, true);
intent.putExtra(ConstHelper.SCROLL_TO, getLayoutPosition());
LocalBroadcastManager.getInstance(itemView.getContext()).sendBroadcast(intent);
if (flAdmin.isFolded()) {
flAdmin.unfoldWithAnimation();
} else {
flAdmin.foldWithAnimation();
}
});
flAdmin.setOnLongClickListener(view -> {
canScroll = true;
return true;
});
}
@Override
public void onClick(View view) {
canScroll = true;
if (isUser) {
canScroll = false;
Intent intent = new Intent(ConstHelper.SIGNATURE_CALL);
intent.putExtra(ConstHelper.CLEAR_CUSTOMER, true);
LocalBroadcastManager.getInstance(viewHolder.this.itemView.getContext()).sendBroadcast(intent);
} else {
if (!flAdmin.isFolded()) {
flAdmin.foldWithAnimation();
}
}
}
@Override
public boolean onLongClick(View view) {
//TODO send report that order has been received
return true;
}
}}
fragment 很简单,其中两个遵循以下模式:
public class Message extends Fragment {
@BindView(R.id.tvConfirmation)
AppCompatTextView tvConfirmation;
Unbinder unbinder;
public Message() {
}
public static Message newInstance(String message) {
Bundle bundle = new Bundle();
bundle.putString("Message", message);
Message fragmentMessage = new Message();
fragmentMessage.setArguments(bundle);
return fragmentMessage;
}
private void readBundle(Bundle bundle) {
if (bundle != null) {
//message = bundle.getString("Message");
}
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.layout_f_message, container, false);
unbinder = ButterKnife.bind(this, view);
return view;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
tvConfirmation.setText(OrdersAdapter.message);
Toast.makeText(getActivity(), OrdersAdapter.message, Toast.LENGTH_SHORT).show();
//readBundle(getArguments());
}
@Override
public void onDestroyView() {
super.onDestroyView();
unbinder.unbind();
}}
另一个只加载一张图片,最后一个没有链接到我正在获取的数据。
我尝试过的
- 使用
Bundles
将数据传送到Fragment
。 - 将加载我的
Fragments
的位置从ViewHolder
类切换到onBindViewHolder
方法。
第一个似乎在我的调试中有效,但无论如何问题仍然存在。
如有任何帮助,我们将不胜感激。
最佳答案
首先从适配器的变量中删除所有 static
限定符。在那之后,看到你想要完成什么,我强烈建议从 Fragment 的复杂性转移到简单的 Views 和 ViewHolders。最后,确保您通知
任何更改的适配器。
关于java - 如何正确设置带有 Fragments 的 RecyclerView 作为 child ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53526677/