How Android achieves the marquee effect

Custom control Focusedtextview to make the Android system think it has focus

1  Public classFocusedtextviewextendsTextView {2      PublicFocusedtextview (context context, AttributeSet attrs,intDefstyle) {3         Super(context, attrs, defstyle);4         //TODO auto-generated Constructor stub5     }6      PublicFocusedtextview (Context context, AttributeSet attrs) {7         Super(context, attrs);8         //TODO auto-generated Constructor stub9     }Ten      PublicFocusedtextview (Context context) { One         Super(context); A         //TODO auto-generated Constructor stub -     } -@ExportedProperty (category = "Focus") the      Public BooleanIsFocused () {//always have focus -         //TODO auto-generated Method Stub -         return true; -     } +}

Use this control in an XML layout

1 <Com.test.ui.FocusedTextView2 Android:id= "@+id/tv_marquee"3 Android:layout_width= "Match_parent"4 Android:layout_height= "Wrap_content"5 Android:singleline= "true"6 android:ellipsize= "Marquee"7 Android:text= "Marquee effect!" Marquee Effect! Marquee Effect! Marquee Effect! Marquee Effect! Marquee Effect! Marquee Effect! Marquee Effect! "8 android:textsize= "30DP" />

How Android achieves the marquee effect