你可以在LinearLayout中使用这个:

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

例如:

<?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>

运行时版本:

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);

就这样写:

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

完整的例子:

<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>

简单的解决方案就是在你的布局中添加这段代码，并将'Id_of__view_present_above'替换为视图的id，下面你需要分隔符。

<TextView
  android:layout_width="match_parent"
  android:layout_height="1dp"
  android:background="#c0c0c0"
  android:id="@+id/your_id"
  android:layout_marginTop="16dp" 
  android:layout_below="@+id/Id_of__view_present_above"
/>

使用这段代码。会有帮助的

<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" >

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

在两个布局之间放置此代码以获得分隔器。