Android Definition (iii) Achieve the percentage setting of a disc

Recently have been learning their own definition of the control, yesterday saw a group of people asked how how to achieve the disk style display, learn to use, and then have this blog

First, at a glance

You can set the display color and the size of the color block.

There are three colors, the corresponding three colors of the three angles

On the code:

<?xml version= "1.0" encoding= "Utf-8"?
><resources>    <declare-styleable name= "customcircle" >        <attr name= "Firstcolor" format= " Color "/>        <attr name=" secondcolor "format=" color "/>        <attr name=" thirdcolor "format=" Color "/>        <attr name= "firstangle" format= "integer"/>        <attr name= "secondangle" format= "integer"/>        <attr name= "Thirdangle" format= "integer"/>    </declare-styleable></resources>

All of the above belong to their own definition of attributes, of course, you define the property to assign it a value

TypedArray Marray = context.obtainstyledattributes (attrs,r.styleable.customcircle, defstyleattr, 0); FirstColor = Marray.getcolor (r.styleable.customcircle_firstcolor,color.blue); secondcolor = Marray.getcolor ( R.styleable.customcircle_secondcolor,color.green); Thirdcolor = Marray.getcolor (r.styleable.customcircle_ thirdcolor,color.red); Firstangle=marray.getint (r.styleable.customcircle_firstangle); secondAngle= Marray.getint (R.styleable.customcircle_secondangle), Thirdangle=marray.getint (R.styleable.customcircle_ Thirdangle, Marray.recycle ();

After the property assignment is finished, the most important part is, of course, the drawing, i.e. overriding the OnDraw () method

@Overrideprotected void OnDraw (canvas canvas) {int center=getwidth ()/2;int Radius=center/2;mpaint.setcolor ( Color.gray); Mpaint.setstrokewidth (center); Mpaint.setantialias (true); Mpaint.setstyle (Paint.Style.STROKE); Canvas.drawcircle (center, center, Radius, mpaint); Mpaint.setcolor (Firstcolor); RECTF rectf=new RECTF (Center-radius, Center-radius, Center+radius, Center+radius); Canvas.drawarc (RectF, 0, FirstAngle , false, Mpaint); Mpaint.setcolor (Secondcolor); Canvas.drawarc (RECTF, Firstangle, Secondangle, False, Mpaint); Mpaint.setcolor (Thirdcolor); Canvas.drawarc (RECTF, Secondangle, Thirdangle, False, Mpaint);}

Let's go ahead and define our own control. That's the end of the definition, how to use it? People who have read the previous blog should know!

<com.sdufe.thea.guo.view.customcircle        android:layout_width= "300DP"        android:layout_height= "300DP"        custom:firstcolor= "@android: Color/holo_purple"        custom:secondcolor= "@android: Color/holo_blue_bright"        custom:thirdcolor= "@android: Color/holo_orange_light"        custom:firstangle= "        custom:secondangle=" "        custom:thirdangle="/>

The thing to note here is custom, which is your own definition of the property, before you declare xmlns:custom= "http://schemas.android.com/apk/res/your own package name"

Almost the same as this, the realization of the function you want, when you do not understand the code logic of others, you can debug, this is a very good way to

Code: http://download.csdn.net/detail/elinavampire/8175771

Android Definition (iii) Achieve the percentage setting of a disc