android:singleLine

android:singleLine attribute (either "true" or "false") constrains the text to a single horizontally scrolling line instead of letting it wrap onto multiple lines.

example:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<TextView
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="TextView without singleLine\n - default text: abcdefghijklmnopqrstuvwxyz! "
    />
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:singleLine="true"
    android:text="TextView WITH singleLine\n - default text: abcdefghijklmnopqrstuvwxyz! "
    />
<EditText  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="EditText without singleLine\n - default text: abcdefghijklmnopqrstuvwxyz! "
    />
<EditText  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:singleLine="true"
    android:text="EditText WITH singleLine\n - default text: abcdefghijklmnopqrstuvwxyz! "
    />
<Button
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Button without singleLine\n - default text: abcdefghijklmnopqrstuvwxyz! "
    />
<Button
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:singleLine="true"
    android:text="Button WITH singleLine\n - default text: abcdefghijklmnopqrstuvwxyz! "
    />
</LinearLayout>

Related Post:
- android.text.InputType