Android draw a Horizontal line between views

Question

It will draw Silver gray colored Line between TextView & ListView

<TextView
    android:id="@+id/textView1"
    style="@style/behindMenuItemLabel1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="1dp"
    android:text="FaceBook Feeds" />

<View
    android:layout_width="match_parent"
    android:layout_height="2dp"
    android:background="#c0c0c0"/>

<ListView
    android:id="@+id/list1"
    android:layout_width="350dp"
    android:layout_height="50dp" />

You should use the new lightweight View Space to draw dividers. Your layout will load faster if you will use Space instead of View.

Horizontal divider:

<android.support.v4.widget.Space
        android:layout_height="1dp"
        android:layout_width="match_parent" /> 

Vertical divider:

<android.support.v4.widget.Space
        android:layout_height="match_parent"
        android:layout_width="1dp" />

You can also add a background:

<android.support.v4.widget.Space
        android:layout_height="match_parent"
        android:layout_width="1dp"
        android:background="?android:attr/listDivider"/>

Usage example:

....
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="One"/>

<android.support.v4.widget.Space
    android:layout_height="match_parent"
    android:layout_width="1dp"
    android:background="?android:attr/listDivider"/>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Two"/>

<android.support.v4.widget.Space
    android:layout_height="match_parent"
    android:layout_width="1dp"
    android:background="?android:attr/listDivider"/>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Three"/>
....

In order to use Space you should add the dependency in your build.gradle:

dependencies {
    compile 'com.android.support:support-v4:22.1.+'
}

Documentation https://developer.android.com/reference/android/support/v4/widget/Space.html

add something like this in your layout between the views you want to separate:

  <View
       android:id="@+id/SplitLine_hor1"
       android:layout_width="match_parent"
       android:layout_height= "2dp"
       android:background="@color/gray" />

Hope it helps :)

Creating it once and using it wherever needed is a good idea. Add this in your styles.xml:

<style name="Divider">
    <item name="android:layout_width">match_parent</item>
    <item name="android:layout_height">1dp</item>
    <item name="android:background">?android:attr/listDivider</item>
</style>

and add this in your xml code, where a line divider is needed:

<View style="@style/Divider"/>

Originally answered by toddles_fp to this question: Android Drawing Separator/Divider Line in Layout?

Try this

<View
    android:layout_width="match_parent"
    android:layout_height="2dp"
    android:background="?android:attr/listDivider"/>

<View
       android:id="@+id/view"
       android:layout_width="match_parent"
       android:layout_height="2dp"
       android:background="#000000" />

After many years, finally there is a proper view to display separators/dividers/horizontal lines on XML layouts. The team who develops the Material Components for Android has released the version 1.5.0-alpha01 which adds the MaterialDivider class. This allows to add dividers to layouts as said previously.

First, in your build.gradle add the following:

implementation 'com.google.android.material:material:1.5.0-alpha01'

Then, on a XML layout you can write:

<com.google.android.material.divider.MaterialDivider
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>

And voila you have a divider. If you want to customize the color of the divider, there is an xml attribute: app:dividerColor. This view also allows theming via styles. For more info you can check this link.