You wouldn't be able to achieve what you want as simple as that then.
Step one: Set the divider as transparent, and make the height a tad larger:
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="@android:color/transparent"
android:dividerHeight="8dp"/>
Step Two: In order to achieve the 'little line' effect, you can add a custom drawable as the list view item background, say the list view item is defined as 'list_item.xml':
<?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"
<-- Add a Custom background to the parent container of the listview items -->
android:background="@drawable/list_item_selector"
android:orientation="vertical" >
<-- Rest of the item layout -->
</LinearLayout>
Of course, that item can be anything you like it to be, mine is:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape
android:shape="rectangle">
<stroke android:width="1dp" android:color="@color/bg_gray" />
<solid android:color="@android:color/white" />
</shape>
</item>
<item android:bottom="1dp">
<shape
android:shape="rectangle">
<stroke android:width="1dp" android:color="#FFDDDDDD" />
<solid android:color="#00000000" />
</shape>
</item>
</layer-list>
But that would then disable the 'Holo Selector' effect, where whenever you click, or highlight an item on the listview, there is a Holo Blue color drawn over it, that's why if you notice on the list item background we didn't use a layer list drawable, we used a selector named 'list_item_selector'.
Here's the selector, which uses the layer list drawable when not pressed, and uses a Holo-blue color when pressed:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_pressed="false"
android:drawable="@drawable/list_item_bg2"
/>
<item android:state_pressed="true"
android:drawable="@color/holo_blue"
/>
</selector>
EDIT for Comment
Absolutely possible, you can define a set height for list view items, however, it is recommended to set a minimum height, rather than a predefined height that never changes.
Say this is my list item layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="@+id/grid_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/grid_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:gravity="center_vertical"
android:layout_toRightOf="@+id/grid_image"
android:minHeight="48dp"
android:padding="8dp"
android:textIsSelectable="false" />
</RelativeLayout>
All needed would be,
Step One: Define the min height, or max height, as you prefer, in the dimens.xml file contained in the values/ folder. Why? Because the height should definitely change based on the layout, and you can define different dimens.xml for each device density.
in the dimens.xml, say:
<resources>
<!-- List Item Max and Min Height -->
<dimen name="list_item_min_height">48dp</dimen>
<dimen name="list_item_max_height">96dp</dimen>
<dimen name="list_item_set_height">64dp</dimen>
</resources>
And then use whichever value for the parent LinearLayout
of you list item's layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="@dimen/list_item_min_height" >
And that's it for that topic, now to center the text, it's even simpler:
If you are using a TextView and is wrapped into a RelativeLayout, use: android:layout_centerVertical="true"
If you are using a LinearLayout, use: android:layout_gravity="center_vertical"
and couple that with: NOTE This only works if you didn't set the height to wrap_content, otherwise it is irrelevant.
android:gravity="center_vertical"
Hope that helps.