Android-two ways to achieve merry effect

The first method (very common, very simple to set the properties of TextView in an XML layout file):

<textview android:id="@+id/tv_text"android:layout_width="match_parent"android:layout_height="wrap_content"android:ellipsize="Marquee"android:focusable="true"android:focusableintouchmode="true"android:marqueerepeatlimit="Marquee_forever"android:singleline="true"android:textsize="28SP"android:text="The road long its repair far XI, I will go up and down and Quest"android:textcolor="#00ff00"android:scrollhorizontally="true"/>

Important Code:

Set as a marquee display

Android:ellipsize= "Marquee"

Get focus
Android:focusable= "true"

You can get focus by TOUCTH.
Android:focusableintouchmode= "true"

Set Number of repetitions
android:marqueerepeatlimit= "Marquee_forever"

Single-line display text
Android:singleline= "true"

2. The second method, since most of the merry text will start on the right side of the phone screen, requires a custom control to implement the

Java code:

 PackageCom.example.cameratestdemo;ImportAndroid.content.Context;ImportAndroid.graphics.Canvas;ImportAndroid.graphics.Paint;ImportAndroid.os.Handler;ImportAndroid.util.AttributeSet;ImportAndroid.util.Log;ImportAndroid.view.View;ImportAndroid.widget.TextView;/*** Implementation of custom control loop Merry * *@authorCyf inherited from TextView*/ Public classUtilextendsTextViewImplementsRunnable {Private Static FinalString TAG = "Marqueetextview"; //set the number of times the marquee repeats    Private intCircletimes = 3; //How many times have the records been repeated?    Private inthascircled = 0; Private intCurrentscrollpos = 0; //the time required to go through the lantern (in seconds)    Private intCirclespeed = 10; //the width of the text    Private intTextWidth = 0; Private Booleanismeasured =false; //handler mechanism    PrivateHandler Handler; Private BooleanFlag =false; //Construction Method     PublicUtil (Context context, AttributeSet attrs) {Super(context, attrs); //TODO auto-generated Constructor stub         This. Removecallbacks ( This); Post ( This); }    /*** Brush Tool*/@Overrideprotected voidOnDraw (canvas canvas) {Super. OnDraw (canvas); if(!ismeasured)            {gettextwidth (); Ismeasured=true; }} @Override Public voidSetvisibility (intvisibility) {        //Initialize member variables at two-time entryFlag =false; Ismeasured=false;  This. hascircled = 0; Super. setvisibility (visibility); } @Override Public voidrun () {//Start scroll positionCurrentscrollpos + = 1; ScrollTo (Currentscrollpos,0); //log.i (TAG, "pos" +currentscrollpos); //Judging scrolling once        if(Currentscrollpos >=textWidth) {            //appears from the right side of the screenCurrentscrollpos =- This. getwidth (); //The number of times a record is set for scrolling is the same as scrolling, and the control can hide the            if(Hascircled >= This. Circletimes) {                 This. setvisibility (View.gone); Flag=true; } hascircled+ = 1; }        if(!flag) {            //Scrolling time intervalPostdelayed ( This, Circlespeed); }    }    /*** Get text display length*/    Private voidGettextwidth () {Paint Paint= This. Getpaint (); String Str= This. GetText (). toString ();        LOG.I (TAG, str); if(str = =NULL) {TextWidth= 0; } textWidth= (int) Paint.measuretext (str); }    /*** Set the number of scrolling times, the number of times after the setting is not visible *@paramCircletimes*/     Public voidSetcircletimes (intcircletimes) {         This. Circletimes =Circletimes; }     Public voidSetspeed (intSpeed ) {         This. Circlespeed =Speed ; }     Public voidstartscrollshow () {if( This. getvisibility () = =View.gone) This. setvisibility (view.visible);  This. Removecallbacks ( This); Post ( This); }    Private voidStopscroll () {handler.removecallbacks ( This); }}

In the layout file, you use a custom control:

<com. Example.cameratestdemo.Util Android:id= "@+id/tv_text"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"android:ellipsize= "Marquee"android:focusable= "true"Android:focusableintouchmode= "true"Android:marqueerepeatlimit= "Marquee_forever"android:scrollhorizontally= "true"Android:singleline= "true"Android:text= "The road is long its repair far, I will go up and down and quest"Android:textcolor= "#00ff00"android:textsize= "28SP" >    </Com.example.cameratestdemo.Util>

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Android-two ways to achieve merry effect