making basic android app, xml help

<?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:background="@drawable/world_series_celebration"
  >

<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:textSize="36dp" 
a开发者_C百科ndroid:text="World Series Trivia" 
android:gravity="center"
/>

<Button
android:text="Click to Start"  
android:layout_width="fill_parent" 
android:layout_height="wrap_content"
android:textSize="25dp"
/>

</LinearLayout>

In my program the background shows up fine and so does the text, but the button does not appear. I feel like i am missing something basic, but i have looked it over and over again and cannot find anything. Any help appreciated

The problem was you were setting android:layout_width="fill_parent" in TextView, So it took full screen width just for displaying the TextView.

So set android:layout_width="wrap_content" to wrap up.

Same for the Button.

Other things are :

LinearLayout's android:orientation="horizontal | vertical"

It will add your components horizontally and vertically when set to horizontal and vertical respectively.

Modified Code I : Adding TextView and Button on Single Row...

<?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="horizontal"
  android:background="@drawable/world_series_celebration"
  >

<TextView 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:textSize="36dp" 
android:text="World Series Trivia" 
android:gravity="center"
/>

<Button
android:text="Click to Start"  
android:layout_width="wrap_content" 
android:layout_height="wrap_content"
android:textSize="25dp"
/>
</LinearLayout>

Modified Code II: Adding TextView and Button Vertically (Adding Components Vertically)...

Change LinearLayout's orientation tag to vertical

android:orientation="vertical"

I'm not sure if it is really needed, but you could try adding android:orientation="vertical" to the LinearLayout