android - 둥근 모서리와 투명한 배경의 대화 상자 내에서 recyclerview에서 항목 장식을 사용하는 방법

대화 상자를 사용하고 있으며이 대화 상자에서 recyclerview를 사용하고 있으며 해당 대화 상자의 모서리가 둥근 사용자 정의 배경 드로어 블을 설정하고 있습니다. 문제는 recyclerview에 항목 장식을 설정하려고 할 때마다 대화 상자의 아래쪽 모서리에 이상한 줄이 표시됩니다 1 및 여기 2  대화 상자 배경을 투명하게 설정했기 때문이라고 생각합니다. 이 줄을 제거하는 방법을 알고 싶습니다

아이템 장식

public ItemDecoration(Context context) {
        mDivider = context.getResources().getDrawable(R.drawable.recycler_horizontal_divider);
    }
    @Override
    public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
        int left = parent.getPaddingLeft();
        int right = parent.getWidth() - parent.getPaddingRight();
        int childCount = parent.getChildCount();
        for (int i = 0; i <= childCount-2; i++) {
            View child = parent.getChildAt(i);
            RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
            int top = child.getBottom() + params.bottomMargin;
            int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

대화 상자 배경

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@color/white"></solid>
    <corners android:radius="@dimen/viewsRadius"></corners>
</shape>

대화 상자 레이아웃

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="wrap_content"
    android:background="@drawable/rounded_corners_dialog_back"
    >

    <TextView
        android:id="@+id/dialogNameTxt"
        android:layout_width="wrap_content"
        android:layout_height="30dp"
        android:layout_alignParentStart="true"
        android:layout_marginStart="10dp"
        android:layout_marginTop="10dp"
        android:gravity="center"
        android:tag="bold"
        android:text=""
        android:textColor="@color/black"
        android:textSize="@dimen/textSize"
        android:textStyle="" />
    <TextView
        android:id="@+id/closeBtn"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_alignParentEnd="true"
        android:layout_marginTop="10dp"
        android:layout_marginEnd="10dp"
        android:tag="icon"
        android:gravity="center"
        android:background="@drawable/yellow_circle"
        android:textColor="@color/white"
        android:textSize="@dimen/textSize"
        android:text="@string/closeIcon" />
    <android.support.v7.widget.RecyclerView
        android:id="@+id/dialogList"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_below="@id/closeBtn"
        android:tag="bold" />
    <Button
        android:id="@+id/addBtn"
        android:layout_width="match_parent"
        android:layout_height="@dimen/viewsHeight"
        android:text="@string/add"
        android:tag="bold"
        android:layout_margin="10dp"
        android:textColor="@color/white"
        android:textAllCaps="false"
        android:background="@drawable/rounded_yellow_button"
        android:layout_below="@id/dialogList"
        />
  <android.support.constraint.ConstraintLayout
      android:visibility="gone"
      android:id="@+id/commentView"
      android:layout_width="match_parent"
      android:layout_below="@id/dialogList"
     android:layout_margin="10dp"
      android:layout_height="wrap_content">
      <EditText
          android:id="@+id/messageEditTxt"
          android:layout_width="0dp"
          android:layout_height="@dimen/viewsHeight"
          android:background="@drawable/edit_text_back"
          android:ems="10"
          android:hint="@string/write_a_comment"
          android:inputType="textPersonName"
          android:paddingStart="10dp"
          android:paddingEnd="10dp"
          android:layout_marginEnd="10dp"
          android:tag="regularFont"
          android:textColor="@color/black"
          android:textCursorDrawable="@null"
          app:layout_constraintEnd_toStartOf="@+id/sendBtn"
          app:layout_constraintStart_toStartOf="parent"
          app:layout_constraintBottom_toBottomOf="parent" />
      <TextView
          android:id="@+id/sendBtn"
          android:layout_width="@dimen/circleButtonDimension"
          android:layout_height="@dimen/circleButtonDimension"
          android:background="@drawable/yellow_circle"
          android:gravity="center"
          android:padding="@dimen/iconTextPadding"
          android:tag="icon"
          android:text="@string/sendIcon"
          android:textColor="@color/white"
          android:textSize="@dimen/iconTextSize"
          app:layout_constraintBottom_toBottomOf="parent"
          app:layout_constraintEnd_toEndOf="parent"/>
  </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/dialogNameTxt"
        android:id="@+id/cancelDialogView"
        android:visibility="gone">
        <TextView
            android:id="@+id/message"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="10dp"
            android:layout_marginEnd="10dp"
            android:layout_marginBottom="20dp"
            android:layout_marginTop="10dp"
            android:tag="regularFont"
            android:text="@string/confirm_cancel"
            android:textColor="@color/black"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView3"
            app:layout_constraintBottom_toTopOf="@id/yesBtn"/>
        <Button
            android:id="@+id/yesBtn"
            android:layout_width="0dp"
            android:layout_height="@dimen/viewsHeight"
            android:layout_marginStart="10dp"
            android:layout_marginEnd="10dp"
            android:layout_marginBottom="10dp"
            android:background="@drawable/rounded_yellow_button"
            android:text="@string/yes"
            android:textAllCaps="false"
            android:textColor="@color/white"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toStartOf="@+id/guideline4"
            app:layout_constraintStart_toStartOf="parent" />
        <Button
            android:id="@+id/noBtn"
            android:layout_width="0dp"
            android:layout_height="@dimen/viewsHeight"
            android:layout_marginStart="10dp"
            android:layout_marginEnd="10dp"
            android:layout_marginBottom="10dp"
            android:background="@drawable/rounded_yellow_button"
            android:text="@string/no"
            android:textAllCaps="false"
            android:textColor="@color/white"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="@+id/guideline4" />
        <android.support.constraint.Guideline
            android:id="@+id/guideline4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_constraintGuide_percent="0.5" />
        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/errorIcon"
            android:textSize="60sp"
            android:textColor="@color/red"
            android:tag="icon"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </android.support.constraint.ConstraintLayout>
</RelativeLayout>

여기서 배경을 표시하기 위해 대화 상자의 배경을 투명하게 설정했습니다

getWindow().requestFeature(Window.FEATURE_NO_TITLE);
getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));