I would like to draw a line right in the middle of a layout and use it as a separator of other items like TextView. Is there a good widget for this. I don't really want to use an image as it would be hard to match the other components to it. And I want it to be relatively positioned as well. Thanks

Add this in your layout where you want the divider (modify the attributes to fit your need):

<ImageView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@android:drawable/divider_horizontal_dark"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:scaleType="fitXY"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:paddingBottom="2dp"
    android:paddingTop="2dp" />

<TextView
    android:id="@+id/line"
    style="?android:attr/listSeparatorTextViewStyle"
    android:paddingTop="5dip"
    android:gravity="center_horizontal"
    android:layout_below="@+id/connect_help"
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="#000" />

I usually use this code to add horizontal line:

<View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="@android:color/darker_gray"/>

To add vertical separator, switch the layout_width and layout_height values

To improve on the answers provided by Alex Kucherenko and Dan Dar3

I added this to my styles:

<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>

Then in my layouts is less code and simpler to read.

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

Runtime version:

View dividerView = new View(getContext());
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
    ViewGroup.LayoutParams.FILL_PARENT, UIUtils.dpToPix(getContext(), 1));
dividerView.setLayoutParams(lp);

TypedArray array = getContext().getTheme()
    .obtainStyledAttributes(new int[] {android.R.attr.listDivider});
Drawable draw = array.getDrawable(0);       
array.recycle();

dividerView.setBackgroundDrawable(draw);
mParentLayout.addView(dividerView);

use this code. It will help

<LinearLayout
    android:layout_width="0dip"
    android:layout_height="match_parent"
    android:layout_gravity="center"
    android:layout_weight="1"
    android:divider="?android:dividerHorizontal"
    android:gravity="center"
    android:orientation="vertical"
    android:showDividers="middle" >

You can use this in LinearLayout :

android:divider="?android:dividerHorizontal"
android:showDividers="middle"

For Example:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:divider="?android:dividerHorizontal"
    android:showDividers="middle"
    android:orientation="vertical" >            

        <TextView 
         android:layout_height="wrap_content"
         android:layout_width="wrap_content"
         android:text="abcd gttff hthjj ssrt guj"/>

        <TextView 
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="abcd"/>
        <TextView 
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="abcd gttff hthjj ssrt guj"/>

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

</LinearLayout>

if you use actionBarSherlock, you can use the com.actionbarsherlock.internal.widget.IcsLinearLayout class in order to support dividers and show them between the views .

example of usage:

<com.actionbarsherlock.internal.widget.IcsLinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:divider="@drawable/divider"
    android:dividerPadding="10dp"
    android:orientation="vertical"
    android:showDividers="beginning|middle|end" >
... children...

res/drawable/divider.xml :

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <size android:height="2dip" />

    <solid android:color="#FFff0000" />

</shape>

do note that for some reason, the preview in the graphical designer says "android.graphics.bitmap_delegate.nativeRecycle(I)Z" . not sure what it means, but it can be ignored as it works fine on both new versions of android and old ones (tested on android 4.2 and 2.3) .

seems the error is only shown when using API17 for the graphical designer.

It adds a horizontal divider to anywhere in your layout.

    <TextView
       style="?android:listSeparatorTextViewStyle"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"/>

//for vertical line:

<View
   android:layout_width="1dp"
   android:layout_height="fill_parent"
   android:background="#00000000" />




//for horizontal line: 

<View
   android:layout_width="fill_parent"
   android:layout_height="1dp"
   android:background="#00000000" />
//it works like a charm

Here is your answer..this is an example to draw line between controls...

<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="fill_parent"
             android:layout_height="2dp"
             android:background="#d13033"/>

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

This code draw line between two controls...

use this xml code to add vertical line

 <View
    android:layout_width="1dp"
    android:layout_height="match_parent"
    android:layout_centerVertical="true"
    android:background="#000000" />

use this xml code to add horizontal line

<View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="#000000" />

Adding this view; that draws a separator between your textviews

<View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="#000000" />

Just write this :

 android:divider="?android:dividerHorizontal"
 android:showDividers="middle"

full example:

<LinearLayout
        android:id="@+id/llTipInformation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/tvServiceRating"
        android:orientation="horizontal"
        android:divider="?android:dividerHorizontal"
        android:layout_marginTop="@dimen/activity_horizontal_margin"
        android:showDividers="middle">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="@string/main.msg.tippercent"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="@color/colorWhite"
            android:layout_marginTop="@dimen/activity_vertical_margin"/>
        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="@string/main.msg.tiptotal"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="@color/colorWhite"
            android:layout_marginTop="@dimen/activity_vertical_margin"/>

</LinearLayout>

Its very simple. Just create a View with the black background color.

<View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="#000"/>

This will create a horizontal line with background color. You can also add other attributes such as margins, paddings etc just like any other view.

I got easiest way to add divider.

Vertical divider :

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

Horizontal divider :

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

That's all yes!

Just put this in res>values>styles.xml

<style name="dividerBase">
    <item name="android:background">?android:attr/listDivider</item> //you can give your color here. that will change all divider color in your app.
</style>

<style name="dividerHorizontal" parent="dividerBase">
    <item name="android:layout_width">match_parent</item>
    <item name="android:layout_height">1dp</item> // You can change thickness here.

</style>

<style name="dividerVertical" parent="dividerBase">
    <item name="android:layout_width">1dp</item>
    <item name="android:layout_height">match_parent</item>
</style>

You can use this <View> element just after the First TextView.

 <View
         android:layout_marginTop="@dimen/d10dp"
         android:id="@+id/view1"
         android:layout_width="fill_parent"
         android:layout_height="1dp"
         android:background="#c0c0c0"/>

<View
            android:layout_width="2dp"
            android:layout_height="match_parent"
            android:layout_marginTop="4dp"
            android:background="@android:color/darker_gray" />

Between two Layouts Put this code to get Divider.