如何使用数据绑定在 recyclerview 中获取选定的 textView 值（当前位置）？

Question

我有一个 recyclerview 使用 databinding。

我需要在 onClick 中从 recyclerview 布局中获取选定的 textview 值，但我不知道如何获取它。

我在 google 上搜索并找到了一些解决方案，但无法解决我的问题。

谁能帮帮我？

适配器：

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.itemHolder> {
    private StudentAllSessionsAdapter.ClickEvent clickEvent;
    private List<StudentEntry> studentList;
    private RecyclerViewAdapterBinding binding;
    .
    .
    .

    public RecyclerViewAdapter.itemHolder onCreateViewHolder(@NonNull @NotNull ViewGroup parent, int viewType) {
        binding = DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()), R.layout.recyclerview_student_all_session, parent, false);
        clickEvent = new RecyclerViewAdapter.ClickEvent();
        binding.setClickEvent(clickEvent);
        return new RecyclerViewAdapter.itemHolder(binding);
    }

    @Override
    public void onBindViewHolder(@NonNull @NotNull RecyclerViewAdapter.itemHolder holder, int position) {
        StudentEntry studentEntry = studentList.get(position);
        holder.itemView.setStudentEntry(studentEntry);
        int scoreSum = database.attendanceDao().getAllScoreStudent(studentEntry.getClassId(), studentEntry.getStudentId());
        holder.itemView.textViewItemRecyclerViewStudentListScore.setText(String.valueOf(scoreSum));
    }

    public class ClickEvent {
        public void onClickScore(int classId, String studentId, String studentName) {
            //I need to get the TextView value of the current position here
        }
    }
}

RecyclerView 布局：

<layout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
    <variable
        name="clickEvent"
        type="com.example.user.classmanager.RecyclerViewAdapter.ClickEvent" />
    <variable
        name="studentEntry"
        type="com.example.user.classmanager.database.StudentEntry" />
</data>
<RelativeLayout
    android:id="@+id/relativeLayout_item_recyclerView_StudentList"
    style="@style/RecyclerVew_BackGround_all"
    >
    <Button
        android:id="@+id/button_item_recyclerView_StudentList_saveScore"
        style="@style/Button_item_recyclerView_StudentList_saveAbsent"
        android:onClick="@{() -> clickEvent.onClickScore(studentEntry.classId, studentEntry.studentId, studentEntry.studentName)}" />

    <TextView
        android:id="@+id/textView_item_recyclerView_StudentList_score"
        style="@style/TextView_item_recyclerView_StudentList_values" />
</RelativeLayout>
</layout>

Answer 1

我找到了一个简单的方法。

1st : 在 onClick 按钮中添加一个新参数以从 textView（当前位置）获取文本 :

    <Button
        android:id="@+id/button_item_recyclerView_StudentList_saveScore"
        style="@style/Button_item_recyclerView_StudentList_saveAbsent"
        android:onClick="@{() -> clickEvent.onClickScore(textViewItemRecyclerViewStudentListScore.getText().toString() , studentEntry.studentId, studentEntry.studentName)}" />

注意： 新参数采用 CamelCase 名称格式。

2nd : 获取onClick中的新参数(textView值) :

    public void onClickScore(String textViewValue, int classId, String studentId, String studentName) {
        //Do whatever you want with textViewValue 
    }

如何使用数据绑定在 recyclerview 中获取选定的 textView 值（当前位置）？

How to get selected textView value(current position) in recyclerview using data binding?

android

android-adapter

android-recyclerview

android-databinding