androidx.recyclerview.widget.recyclerview$LayoutParams不能强制转换为androidx.constraintlayout.widget.constraintlayout$LayoutParams

我有一个活动，其中xml布局包含约束布局和Linearlayout，RecyclerView作为其子布局

我有一个按钮绑定到适配器上的onCLick侦听器上，每次执行单击时。应用程序崩溃并记录此错误

2019-09-11 09:52:19.713 22060-22060/com.myapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.myapp PID: 22060
    java.lang.ClassCastException: androidx.recyclerview.widget.RecyclerView$LayoutParams cannot be cast to androidx.constraintlayout.widget.ConstraintLayout$LayoutParams
        at androidx.constraintlayout.widget.ConstraintLayout.getTargetWidget(ConstraintLayout.java:1144)
        at androidx.constraintlayout.widget.ConstraintLayout.setChildrenConstraints(ConstraintLayout.java:1028)
        at androidx.constraintlayout.widget.ConstraintLayout.updateHierarchy(ConstraintLayout.java:803)
        at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1561)
        at android.view.View.measure(View.java:22071)
        at androidx.constraintlayout.widget.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1227)
        at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1572)
        at android.view.View.measure(View.java:22071)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6602)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
        at android.view.View.measure(View.java:22071)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6602)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
        at android.view.View.measure(View.java:22071)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6602)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at android.view.View.measure(View.java:22071)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6602)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
        at android.view.View.measure(View.java:22071)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6602)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at com.android.internal.policy.DecorView.onMeasure(DecorView.java:724)
        at android.view.View.measure(View.java:22071)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2422)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1504)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1761)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1392)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6752)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
        at android.view.Choreographer.doCallbacks(Choreographer.java:723)
        at android.view.Choreographer.doFrame(Choreographer.java:658)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

以下是我的活动布局：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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:layout_margin="8dp"
    android:elevation="2dp"
    android:background="@drawable/bill_border"
    tools:context=".ui.MyBillsActivity">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/container"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:paddingBottom="60dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="parent">

                <androidx.appcompat.widget.AppCompatTextView
                    android:id="@+id/number_of_parts"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/parts"
                    android:textColor="@color/colorPrimary"
                    android:gravity="center"
                    android:padding="20dp"
                    app:layout_constraintLeft_toLeftOf="parent"
                    app:layout_constraintRight_toRightOf="parent" />

                <LinearLayout
                    android:id="@+id/parts_button"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    app:layout_constraintLeft_toLeftOf="parent"
                    app:layout_constraintRight_toRightOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/number_of_parts">

                        <androidx.appcompat.widget.AppCompatButton
                            android:layout_width="35dp"
                            android:layout_height="35dp"
                            android:text="2"
                            android:gravity="center"
                            android:textColor="@color/colorPrimary"
                            android:paddingTop="4dp"
                            android:paddingRight="1dp"
                            android:paddingBottom="4dp"
                            android:paddingLeft="1dp"
                            android:layout_marginStart="10dp"
                            android:background="@drawable/send_bill_selector_background" />

                        <androidx.appcompat.widget.AppCompatButton
                            android:layout_width="35dp"
                            android:layout_height="35dp"
                            android:text="3"
                            android:textColor="@color/colorPrimary"
                            android:paddingTop="4dp"
                            android:paddingRight="1dp"
                            android:paddingBottom="4dp"
                            android:paddingLeft="1dp"
                            android:layout_marginStart="10dp"
                            android:background="@drawable/send_bill_selector_background" />

                        <androidx.appcompat.widget.AppCompatButton
                            android:layout_width="35dp"
                            android:layout_height="35dp"
                            android:text="4"
                            android:textColor="@color/colorPrimary"
                            android:paddingTop="4dp"
                            android:paddingRight="1dp"
                            android:paddingBottom="4dp"
                            android:paddingLeft="1dp"
                            android:layout_marginStart="10dp"
                            android:background="@drawable/send_bill_selector_background" />

                        <androidx.appcompat.widget.AppCompatButton
                            android:layout_width="35dp"
                            android:layout_height="35dp"
                            android:text="5"
                            android:textColor="@color/colorPrimary"
                            android:paddingTop="4dp"
                            android:paddingRight="1dp"
                            android:paddingBottom="4dp"
                            android:paddingLeft="1dp"
                            android:layout_marginStart="10dp"
                            android:background="@drawable/send_bill_selector_background" />

                </LinearLayout>

                <TextView
                    android:id="@+id/date_and_amount"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/number_of_parts"
                    android:textColor="@color/colorPrimary"
                    android:gravity="center"
                    android:layout_marginTop="40dp"
                    app:layout_constraintLeft_toLeftOf="parent"
                    app:layout_constraintRight_toRightOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/parts_button" />


                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    app:layout_constraintLeft_toLeftOf="parent"
                    app:layout_constraintRight_toRightOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/date_and_amount">

                        <!-- send bill recycler list -->
                        <androidx.recyclerview.widget.RecyclerView
                            android:id="@+id/recycler"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"/>

                </LinearLayout>


                <androidx.appcompat.widget.AppCompatTextView
                    android:id="@+id/tap_text"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerHorizontal="true"
                    android:drawableLeft="@drawable/error_outline"
                    android:drawablePadding="4dp"
                    android:text="This is a special text"
                    android:textColor="@color/colorPrimary"
                    android:textSize="13sp"
                    android:gravity="center"
                    android:paddingTop="4dp"
                    android:paddingRight="4dp"
                    android:paddingBottom="4dp"
                    android:paddingLeft="4dp"
                    app:layout_constraintLeft_toLeftOf="parent"
                    app:layout_constraintRight_toRightOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/payment_layout"/>

        </androidx.constraintlayout.widget.ConstraintLayout>


        <FrameLayout
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginBottom="20dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent">


                <Button
                    android:id="@+id/send_button"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerInParent="true"
                    android:layout_gravity="center"
                    app:text="Submit Button"/>

        </FrameLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

---

张贴您的

layout\u账单

code@Jaymin谢谢，刚刚添加了这个。请将您的java文件也添加到适配器获取callIf的位置如果MyBillViewHolder变量是私有的，您如何访问它们？看起来像是一个

ConstraintLayout

正在寻找一个子

视图

，该子视图具有依赖于它的约束，它会找到你的

RecyclerView

项。它可以毫无问题地完成初始布局，因为

RecyclerView

还没有填充，但是在隐藏嵌套布局、内部

LinearLayout

之后，它会触发重新布局。这些布局是否与您现在的布局完全相同？

layout\u bills

中的根ID是否总是

my\u payment\u layout

？

点击文本

按钮上的最后一个约束是否始终处于

“@id/payment\u布局”

？

public class MysBillAdapter extends RecyclerView.Adapter<MysBillAdapter.MyBillViewHolder> {

    private String[] mDataset;

    public static class MyBillViewHolder extends RecyclerView.ViewHolder {

        private final AppCompatButton hideShow;
        private final LinearLayout percentageLayout;
        private final LinearLayout dueDateLayout;

        public View view;

        public MyBillViewHolder(View v) {
            super(v);
            hideShow = v.findViewById(R.id.hide_show);
            percentageLayout = v.findViewById(R.id.percentage_layout);
            dueDateLayout = v.findViewById(R.id.due_date_layout);
        }
    }

    // Provide a suitable constructor (depends on the kind of dataset)
    public MysBillAdapter(String[] myDataset) {
        mDataset = myDataset;
    }

    // Create new views (invoked by the layout manager)
    @Override
    public MysBillAdapter.MyBillViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        // create a new view
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_bills, parent, false);
        return new MyBillViewHolder(v);
    }

    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(@NonNull final MyBillViewHolder holder, final int position) {

        holder.hideShow.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                holder.percentageLayout.setVisibility(View.GONE); // This throws an exception
            }
        });

    }

    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return mDataset.length;
    }
}

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/my_payment_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/bill_border"
    android:orientation="horizontal"
    android:elevation="2dp"
    android:layout_marginTop="10dp"
    android:layout_marginLeft="30dp"
    android:layout_marginRight="30dp"
    android:layout_marginBottom="5dp"
    android:padding="10dp">

    <!-- payment -->
    <LinearLayout
        android:id="@+id/box1"
        android:layout_width="230dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="0dp"
        android:layout_marginTop="4dp"
        android:background="@drawable/border"
        android:orientation="vertical">


        <!-- percentage form -->
        <LinearLayout
            android:id="@+id/percentage_layout"
            android:orientation="horizontal"
            android:layout_marginTop="20dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

            <androidx.appcompat.widget.AppCompatEditText
                android:layout_width="65dp"
                android:layout_height="35dp"
                android:text="3"
                android:textSize="13sp"
                android:inputType="number"
                android:maxLength="3"
                android:textColor="@color/colorPrimaryDark"
                android:gravity="center"
                android:paddingTop="4dp"
                android:paddingRight="1dp"
                android:paddingBottom="4dp"
                android:paddingLeft="1dp"
                android:background="@drawable/border_dark_blue" />

            <androidx.appcompat.widget.AppCompatTextView
                android:layout_width="25dp"
                android:layout_height="35dp"
                android:text="%"
                android:textColor="@color/colorPrimaryDark"
                android:gravity="center"
                android:paddingTop="4dp"
                android:paddingRight="1dp"
                android:paddingBottom="4dp"
                android:paddingLeft="1dp"
                />

            <androidx.appcompat.widget.AppCompatTextView
                android:layout_width="65dp"
                android:layout_height="35dp"
                android:text="of 100"
                android:textColor="@color/colorPrimaryDark"
                android:gravity="left"
                android:paddingTop="4dp"
                android:paddingRight="1dp"
                android:paddingBottom="4dp"
                android:paddingLeft="1dp"
                />

        </LinearLayout>


        <!-- percentage form -->
        <LinearLayout
            android:id="@+id/due_date_layout"
            android:orientation="horizontal"
            android:layout_marginTop="15dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/border_dark_blue">

            <androidx.appcompat.widget.AppCompatImageView
                android:layout_width="45dp"
                android:layout_height="wrap_content"
                android:src="@drawable/my_calender"
                android:gravity="center"
                android:layout_marginTop="3dp"
                android:paddingTop="4dp"
                android:paddingRight="1dp"
                android:paddingBottom="4dp"
                android:paddingLeft="1dp" />

            <androidx.appcompat.widget.AppCompatTextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="My payment Due Date"
                android:textColor="@color/colorPrimaryDark"
                android:gravity="center"
                android:layout_marginTop="3dp"
                android:paddingTop="4dp"
                android:paddingRight="1dp"
                android:paddingBottom="4dp"
                android:paddingLeft="1dp" />

            <androidx.appcompat.widget.AppCompatImageView
                android:layout_width="45dp"
                android:layout_height="35dp"
                android:src="@drawable/arrow_right"
                android:gravity="left"
                android:paddingTop="4dp"
                android:paddingRight="1dp"
                android:paddingBottom="4dp"
                android:paddingLeft="1dp" />

        </LinearLayout>

    </LinearLayout>



    <!-- edit -->
    <LinearLayout
        android:id="@+id/box3"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginStart="0dp"
        android:layout_marginTop="0dp"
        android:gravity="center">

        <androidx.appcompat.widget.AppCompatButton
            android:id="@+id/hide_show"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textColor="@color/colorPrimary"
            android:background="@color/white"
            android:gravity="center"
            android:tag="hide"
            android:text="HIDE" />

    </LinearLayout>

</LinearLayout>

public class MyBillActivity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private RecyclerView.Adapter mAdapter;
    private RecyclerView.LayoutManager layoutManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my_bill);



        recyclerView = (RecyclerView) findViewById(R.id.recycler);
        recyclerView.setHasFixedSize(true);

        layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);


        // specify an adapter (see also next example)
        mAdapter = new MyBillAdapter(new String[]{"", "", "", ""});
        recyclerView.setAdapter(mAdapter);

    }

}