DividerItemDecoration 不显示android

Question

I have this simple layout for recycler view items.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/details"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:background="?android:attr/selectableItemBackground"
android:paddingEnd="15dp"
android:paddingStart="15dp"
>

<org.tchouaffe.ftinfosystem.utils.CustomTextView
    android:id="@+id/name"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:textColor="@color/primaryTextColor"
    android:textSize="15sp"/>


<org.tchouaffe.ftinfosystem.utils.CustomTextView
    android:id="@+id/level"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_alignParentRight="true"
    android:layout_toRightOf="@id/name"
    android:gravity="center_vertical|right"
    android:textColor="@color/primaryTextColor"
    android:textSize="15sp"/>
</RelativeLayout>

Answer 1

You also need to call setDrawable() on DividerDecoration .

Provide a drawable resource. An XML shape drawable can be a good start. The shape will be rendered as the divider between recycler item views.

Alternatively, when declaring the app theme, you can set android:listDivider item to the desired drawable.

Answer 2

try using this vector as divider line

<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="2dp"
android:viewportWidth="24"
android:viewportHeight="2">
<path
    android:pathData="M0,0L100,0.5"
    android:strokeWidth="2"
    android:fillColor="#00000000"
    android:strokeColor="@color/lessons_divider_line_background"/>