Android self-defined control-circular progress bar (with figure Diao in the middle)

Smart Home is more and more popular, in the smart home we often want to show some of the percentage of data circular bar in the middle plus a picture is a very popular definition of the view

1. First step you need to inherit the Class View

View

2. The second step is to implement three construction methods and the method of constructing the current multi-parameter call with fewer parameters in front

 PublicCircleprogressimageview (Context context) { This(Context, NULL);} PublicCircleprogressimageview (Context Context, AttributeSet attrs) { This(Context, Attrs,0);} PublicCircleprogressimageview (Context Context, AttributeSet Attrs, intDEFSTYLEATTR) {Super(Context, Attrs, DEFSTYLEATTR);    Init (context,Attrs,DEFSTYLEATTR);}

3. Step three: Take your own definition of attributes and initialize the brushes, etc.

private voidInit(Context Context, AttributeSet Attrs, intDEFSTYLEATTR) { This.Context=context;    /*** Get your own definition properties     */    TypedArrayA=context.obtainstyledattributes (attrs,r.styleable.Circleprogressimageviewattrs);    Bitmap=a.getresourceid (r.styleable.circleprogressimageviewattrs_imagers,R.mipmap.Ic_launcher);    /*** Convert picture resources to bitmap objects     */    Drawbitmap=bitmapfactory.Decoderesource(Context.getresources (),Bitmap);    /*** Initialize RECTF object     */    MRECTF=NewRECTF ();    Mpaint=NewPaint ();    Mpaint. Setantialias (true);}

4. The fourth step:onmeasureheight and width are handled in the method

protected voidonmeasure(intWidthmeasurespec, intHEIGHTMEASURESPEC) {Super. Onmeasure (Widthmeasurespec, HEIGHTMEASURESPEC);    /*** Get the current view width and height     */    width= This. GetWidth ();    Height= This. GetHeight ();    /*** To handle the left and right up and down     */    MRECTF. Left=Mcirclestorewidth/2;    MRECTF.Top=Mcirclestorewidth/2;    MRECTF. Right=width-Mcirclestorewidth/2;    MRECTF.Bottom=width-Mcirclestorewidth/2;}

5. We need to draw the OnDraw () method at this time

protected voidOnDraw(CanvasCanvas) {Super. OnDraw (Canvas);    Canvas.drawcolor (Color.TRANSPARENT);    //Draw round Beijing    Mpaint. SetColor (Getresources (). GetColor (R.color.Orange));    Mpaint. SetStyle (Paint.style.STROKE);    Mpaint. Setstrokewidth (Mcirclestorewidth);    Canvas.drawarc (MRECTF,- -, the, False,Mpaint);    /*** Progress display of drawing arcs     */    Mpaint. SetColor (Getresources (). GetColor ((R.color.Gray)));    Canvas.drawarc (MRECTF,- -,((float)Mprocessvalue/Mmaxprocessvalue)* the, False,Mpaint);    Log.D(TAG,((float)Mprocessvalue/Mmaxprocessvalue)* the+"");    /*** Drawing the middle of the picture     */    floatimageleft=width/2-Drawbitmap. GetWidth ()/2;floatimagetop=Height/2-Drawbitmap. GetHeight ()/2;    Canvas.drawbitmap (Drawbitmap,Imageleft,Imagetop,Mpaint);}

So we're going to achieve a nice and simple definition of the view own definition properties References other articles this is not the case here.

But this view is not going to turn. Only through mainactivity settings in the thread setmprocessvalue (processvalue) The call changes the value to be able to turn.

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Android self-defined control-circular progress bar (with figure Diao in the middle)