Android automatic horizontally scrolling TextView

If you don't need to sub-class the TextView, you can try this in your layout file:

    <TextView
        android:text="Single-line text view that scrolls automatically if the text is too long to fit in the widget" 
        android:singleLine="true"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit ="marquee_forever"
        android:focusable="true"
        android:focusableInTouchMode="true" 
        android:scrollHorizontally="true"
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/>

Also, in your code use the following:

findViewById(R.id.serviceColorCode).setSelected(true);

[Answer edited based on comments]

After these xml code as answered by @rajat

<TextView
        android:text="Single-line text view that scrolls automatically if the text is too long to fit in the widget" 
        android:singleLine="true" 
        android:ellipsize="marquee"
        android:marqueeRepeatLimit ="marquee_forever"
        android:focusable="true"
        android:focusableInTouchMode="true" 
        android:scrollHorizontally="true"
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/>

We need to set

TextView tv=(TextView)findViewById(R.id.textview1);
  tv.setSelected(true); 

which finally made mine work

My solution works:

<TextView
     android:id="@+id/titolotxt"
     android:layout_width="..."
     android:layout_height="..."
     android:ellipsize="marquee"
     android:gravity="left"
     android:marqueeRepeatLimit="marquee_forever"
     android:singleLine="true"
     android:text="@string/titolo"/>

And the TextView have to be setted selected: textView.setSelected(true); by code in onCreate for example.

// this TextView will marquee because it is selected
TextView marqueeText1 = (TextView) findViewById(R.id.marquee_text_1);
marqueeText1.setSelected(true);

<TextView
    android:id="@+id/marquee_text_1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit."
    android:textSize="24sp"
    android:singleLine="true"
    android:ellipsize="marquee"
    android:marqueeRepeatLimit="marquee_forever"
    android:scrollHorizontally="true" />