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java - RecyclerView 项目可点击但不可见

转载 作者:行者123 更新时间:2023-12-02 12:03:19 25 4
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我已经为这个问题苦苦挣扎了几天。确实很奇怪。我有一个具有以下结构的 fragment 。

ScrollView
ConstraintLayout
TextView1
TwoWayView1
TextView2
TwoWayView2

TwoWayView(RecyclerView 库)正在填充项目,我添加了一个 onItemClickListener 来测试项目是否确实存在。因此,当我点击该项目所在区域的空白区域时。它给了我该项目的正确位置和名称。但该项目不可见。

我真的希望有人能帮助我。这是我的代码。

fragment_events

<?xml version="1.0" encoding="utf-8"?>
<ScrollView 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
tools:context="EventsFragment">

<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
android:id="@+id/tvHeaderSocialEvents"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:text="Social Events"
android:textSize="24sp"
android:textStyle="bold"
app:layout_constraintHorizontal_bias="0.033"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />

<org.lucasr.twowayview.widget.TwoWayView
android:id="@+id/lvSocialEvents"
style="@style/TwoWayView"
android:layout_width="0dp"
android:layout_height="260dp"
android:layout_marginTop="8dp"
android:clipChildren="true"
android:clipToPadding="false"
android:drawSelectorOnTop="false"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tvHeaderSocialEvents"
tools:context=".activities.MenuGuillotineActivity"
tools:layout_conversion_absoluteHeight="80dp"
tools:layout_conversion_absoluteWidth="395dp"
tools:layout_conversion_absoluteX="8dp"
tools:layout_conversion_absoluteY="68dp" />


<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="846dp"
android:text="temp"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteX="175dp" />

<TextView
android:id="@+id/tvHeaderSportEvents"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:text="Sport Events"
android:textSize="24sp"
app:layout_constraintHorizontal_bias="0.027"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/lvSocialEvents" />

<org.lucasr.twowayview.widget.TwoWayView
android:id="@+id/lvSportEvents"
style="@style/TwoWayView"
android:layout_width="0dp"
android:layout_height="80dp"
android:layout_marginTop="8dp"
android:drawSelectorOnTop="false"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tvHeaderSportEvents"
tools:LayoutManager="TwoWayLayoutManager"
tools:context=".activities.MenuGuillotineActivity"
tools:layout_conversion_absoluteHeight="80dp"
tools:layout_conversion_absoluteWidth="395dp"
tools:layout_conversion_absoluteX="8dp"
tools:layout_conversion_absoluteY="68dp" />

<TextView
android:id="@+id/tvHeaderOfficialEvents"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:text="Official Events"
android:textSize="24sp"
app:layout_constraintHorizontal_bias="0.025"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/lvSportEvents" />

<org.lucasr.twowayview.widget.TwoWayView
android:id="@+id/lvOfficialEvents"
style="@style/TwoWayView"
android:layout_width="0dp"
android:layout_height="80dp"
android:layout_marginTop="8dp"
android:drawSelectorOnTop="false"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tvHeaderOfficialEvents"
tools:LayoutManager="TwoWayLayoutManager"
tools:context=".activities.MenuGuillotineActivity"
tools:layout_conversion_absoluteHeight="80dp"
tools:layout_conversion_absoluteWidth="395dp"
tools:layout_conversion_absoluteX="8dp"
tools:layout_conversion_absoluteY="68dp" />
</android.support.constraint.ConstraintLayout>
</ScrollView>

事件 fragment

public class EventsFragment extends Fragment {

ArrayList<EventClass> eventClassArrayList;
RecyclerView.Adapter eventClassEventsAdapter;
TwoWayView lvSocialEvents;
View masterView;
TwoWayView lvSportEvents;
TwoWayView lvOfficialEvents;
StudentClass studentClass;
String studRank;
Context context;



public EventsFragment() {
// Required empty public constructor
}

private void createHeadings(View view) {
TextView lvHeaderSocialEvents = (TextView) view.findViewById(R.id.tvHeaderSocialEvents);
lvHeaderSocialEvents.setTypeface(EasyFonts.caviarDreamsBold(context));
TextView lvHeaderSportEvents = (TextView) view.findViewById(R.id.tvHeaderSportEvents);
lvHeaderSportEvents.setTypeface(EasyFonts.caviarDreamsBold(context));
TextView lvHeaderOfficialEvents = (TextView) view.findViewById(R.id.tvHeaderOfficialEvents);
lvHeaderOfficialEvents.setTypeface(EasyFonts.caviarDreamsBold(context));

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_events, container, false);
masterView = view;


// Get Application Context
context = getContext().getApplicationContext();
Fresco.initialize(context);


// Assign components
lvSocialEvents = (TwoWayView) view.findViewById(R.id.lvSocialEvents);
lvSocialEvents.setLayoutManager(new ListLayoutManager(context, TwoWayLayoutManager.Orientation.HORIZONTAL));


lvSocialEvents.setHasFixedSize(true);
lvSportEvents = (TwoWayView) view.findViewById(R.id.lvSportEvents);
lvSportEvents.setLayoutManager(new ListLayoutManager(context, TwoWayLayoutManager.Orientation.HORIZONTAL));
lvSportEvents.setHasFixedSize(true);
lvOfficialEvents = (TwoWayView) view.findViewById(R.id.lvOfficialEvents);
lvOfficialEvents.setLayoutManager(new ListLayoutManager(context, TwoWayLayoutManager.Orientation.HORIZONTAL));
lvOfficialEvents.setHasFixedSize(true);

createHeadings(view);

// Get global data
SharedPreferences global = context.getSharedPreferences("globalData", MODE_PRIVATE);
if (global.contains("student")) {
//Get json from SP and decode json to EmployeeClass.
SharedPreferences shared = context.getSharedPreferences("studentData", MODE_PRIVATE);
Gson gson = new Gson();
String json = shared.getString("studentObject", "");
studentClass = gson.fromJson(json, StudentClass.class);
studRank = studentClass.rank;


} else {
studRank = "0";
}


// Get all the events from the Web server
StringRequest stringRequest = new StringRequest(Request.Method.POST, getResources().getString(R.string.url_event), new Response.Listener<String>() {
@Override
public void onResponse(String output) {
if (!output.isEmpty()) {
ArrayList<CommunicationClass> data = new JsonConverter<CommunicationClass>().toArrayList(output, CommunicationClass.class);
CommunicationClass comm = data.get(0);

if (comm.code.equals("0")) {

// Create list for Events
eventClassArrayList = new JsonConverter<EventClass>().toArrayList(comm.info, EventClass.class);


// Create and add events to EventsAdapter and add to TwoWayView
eventClassEventsAdapter = new EventsAdapter(context,eventClassArrayList);

lvSocialEvents.setAdapter(eventClassEventsAdapter);
lvSportEvents.setAdapter(eventClassEventsAdapter);
lvOfficialEvents.setAdapter(eventClassEventsAdapter);

eventClassEventsAdapter.notifyDataSetChanged();

} else {
ErrorHandling.makeText(context,comm.code, false).show();
}
} else {

}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
ErrorHandling.makeText(context, volleyError).showVolley();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {

//POST data for PHP Script
HashMap<String, String> postDataEvents = new HashMap<String, String>();
postDataEvents.put("event", "true");
if (studRank.equals("0")) {
postDataEvents.put("token", "public");
} else {
postDataEvents.put("token", studentClass.token);
}
return postDataEvents;
}
};

MySingleton.getInstance(context).addToRequestQueue(stringRequest);

com.example.howldevelopment.bcofficial.interfaces.ItemClickSupport itemClickSupport = com.example.howldevelopment.bcofficial.interfaces.ItemClickSupport.addTo(lvSocialEvents);
itemClickSupport.setOnItemClickListener(new com.example.howldevelopment.bcofficial.interfaces.ItemClickSupport.OnItemClickListener() {
@Override
public void onItemClicked(RecyclerView recyclerView, int position, View v) {
Toast.makeText(context, eventClassArrayList.get(position).name, Toast.LENGTH_SHORT).show();
}
});

return view;
}

}

事件适配器

public class EventsAdapter extends    RecyclerView.Adapter<EventsAdapter.EventViewHolder> {

private Context context;
private ArrayList<EventClass> events;
private LayoutInflater mInflater;

public EventsAdapter(Context context,ArrayList<EventClass> events) {
mInflater = LayoutInflater.from(context);
this.context = context;
this.events = events;
}

@Override
public EventViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.event_item_1, parent, false);
EventViewHolder holder = new EventViewHolder(view);
return holder;
}

@Override
public void onBindViewHolder(EventViewHolder holder, int position) {
Toast.makeText(context, events.get(position).name, Toast.LENGTH_SHORT).show();
holder.tvName.setText(events.get(position).name);
holder.tvDate.setText(events.get(position).date);
holder.tvCost.setText(events.get(position).cost);
holder.tvInterested.setText(events.get(position).interested);
}

@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}

@Override
public int getItemCount() {
return events.size();
}

class EventViewHolder extends RecyclerView.ViewHolder {
TextView tvName;
TextView tvDate;
TextView tvCost;
TextView tvInterested;
ImageView imgPoster;

public EventViewHolder(View itemView) {
super(itemView);
tvName = (TextView) itemView.findViewById(R.id.tvEventName);
tvDate = (TextView) itemView.findViewById(R.id.tvEventDate);
tvCost = (TextView) itemView.findViewById(R.id.tvEventPrice);
tvInterested = (TextView) itemView.findViewById(R.id.tvEventInterested);
}
}

}

几个小时前它确实起作用了。但是在 EventsAdapter 中添加了更多组件和所需的代码之后。它停止工作了。并尝试返回到工作构建,但没有成功

我还得到了 E/RecyclerView:未连接适配器;跳过布局错误

最佳答案

Android Studio 显示我的字体颜色是灰色,而在现实生活中它实际上是白色(或我的强调色)。

我刚刚更改了文本字体的颜色,一切正常。

关于java - RecyclerView 项目可点击但不可见,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47082658/

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