android:layout_centerHorizontal="true" is not working in android

This is my source of testing Custom Layout (shows image and label).

XML CODE

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

android:id="@+id/screen_layout" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#3535ff" android:orientation="vertical" android:pa

I have the following xml:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:id="@+id/text_view" android:layout_width="wrap_content" android:layout_height="match_parent" android

I have this layout.xml :

<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingRight="10dp" android:paddingLeft="10dp"> <RelativeLayout android:layout_width="fill_parent" android:layout_he

On the left is the Graphical Layout of the xml. On the right is the actual results rendered in the Device.

I have the following layout:

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

<DatePicker android:layout_width="wrap_content" android:layout_height="wrap_content" /> &lt

I am writing an android game, I have created a kayout for the main menu which has this 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" android:orientation="vertical" >

<TextView android:id="@+id/tvStats" andro

I am trying to display GMaps in a Dialog, can it be done?

I have the layout as

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" style="@style/LoginFormContainer" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="0dp" >

<fragment xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/mapView"

Here's the code:

<RelativeLayout android:id="@+id/tc" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/tc" android:layout_marginLeft="185dip" android:layout_marginTop="25dip" >

<ImageView android:id="@+id/tc_icon" android:background=

I have a relative layout with a transparent background. And a LinearLayout with a ListView below. The problem is, that I don't see my ListView below the transaprent RelativeLayout.