Android custom Controls--Company Chop Production

Do not use the picture, do a simple seal resources, with custom control to implement. ：

Analysis:

1, draw two concentric circles, the outer circle is painted in red, the inner circle is painted with the background color of the parent control.

2,Drawtextonpath to draw text.

3, inside the circle with Path.lineto () to draw a pentagram.

Code:

Attrs.xml

<attr name= "Seal_text" format= "string"/> <attr    name= "seal_textsize" format= "Dimension"/>    < attr name= "Seal_textcolor" format= "color"/> <declare-styleable name=    "Customer_seal" >        <attr Name= "Seal_text"/>        <attr name= "seal_textsize"/> <attr        name= "Seal_textcolor"/>    </ Declare-styleable>

To customize the constructor of the view Customerseal:

Public Customerseal (context context, AttributeSet attrs, int defstyleattr) {Super (context, attrs, defstyleattr); Gets the system default background color TypedArray array = Context.gettheme (). Obtainstyledattributes (New int[] {Android . R.attr.colorbackground, Android.        R.attr.textcolorprimary,});        Mbackgroundcolor =array.getcolor (0, 0XFF00FF);        TypedArray a = Context.gettheme (). Obtainstyledattributes (Attrs, R.styleable.customer_seal, defstyleattr, 0);        int n = a.getindexcount ();            for (int i=0;i<n;i++) {int attr = A.getindex (i);                    Switch (attr) {Case r.styleable.customer_seal_seal_text:mtitle = a.getstring (attr);                Break Case R.styleable.customer_seal_seal_textcolor://default Black Mtextcolor = A.getcolor (attr,                    Color.Black);                Break      Case R.styleable.customer_seal_seal_textsize:              Mtextsize = A.getdimensionpixelsize (attr, (int) typedvalue.applydimension (typedvalue.complex_unit_sp,                    Getresources () getdisplaymetrics ());            Break        }} a.recycle ();        Mpaint = new Paint ();    Mpaint.settextsize (mtextsize); }

Override the Ondtraw () method:

@Override protected void OnDraw (canvas canvas) {//Super.ondraw (canvas);        Get canvas width High mwidth = GetWidth ();        Mheight = GetHeight (); Mpaint.setstrokewidth (5);//Set Brush width Mpaint.setantialias (true);        Specifies whether antialiasing is used and, if used, slows down the drawing speed Mpaint.setcolor (color.red);        Mpaint.setstyle (Paint.Style.STROKE);//drawing style, set to fill//Draw circle Path Circlepath = new Path ();  Circlepath.addcircle (MWIDTH/2, MHEIGHT/2, Path.Direction.CW);        Center x coordinate, y coordinate, radius, direction canvas.drawpath (Circlepath, mpaint); Mpaint.setstrokewidth ((float) 0.0);//Set Brush width mpaint.setcolor (mbackgroundcolor);//Set brush width//Draw a circle Path t        Extcirclepath = new Path ();  Textcirclepath.addcircle (MWIDTH/2, MHEIGHT/2, Path.Direction.CW);        Center x coordinate, y coordinate, radius, direction canvas.drawpath (Textcirclepath, mpaint);        Mpaint.setstrokewidth (0);//Set Brush width mpaint.setcolor (mtextcolor);        Mpaint.setstyle (Paint.Style.FILL); Write Canvas.drawtextonPath (Mtitle,textcirclepath,250,-35,mpaint);        (0,0), (MWIDTH/2-radius,mheight/2-radius) int radius = 80;  int StartX = Mwidth/2-radius; Beginning x position int starty = Mheight/2-radius;        Start Y position//Draw Pentagram path PATH = new Path ();        float Radian = Degree2radian (degree); float radius_in = (float) (RADIUS * Math.sin (RADIAN/2)/Math.Cos (radian));        The radius of the middle Pentagon Path.moveto ((float) (RADIUS * Math.Cos (RADIAN/2) +startx), starty); Path.lineto (float) (RADIUS * Math.Cos (RADIAN/2) + radius_in * Math.sin (radian) + StartX), (float) (Radius-radius * Ma        Th.sin (RADIAN/2) +starty)); Path.lineto ((float) (RADIUS * MATH.COS (RADIAN/2) * 2 + StartX), (float) (Radius-radius * Math.sin (RADIAN/2) + Starty        )); Path.lineto ((float) (RADIUS * Math.Cos (RADIAN/2) + radius_in * Math.Cos (RADIAN/2) +startx), (float) (RADIUS + radius_in        * Math.sin (RADIAN/2) +starty)); Path.lineto ((float) (RADIUS * Math.Cos (RADIAN/2) + radius * MaTh.sin (Radian) +startx), (float) (radius + radius * Math.Cos (radian) +starty));        Path.lineto ((float) (RADIUS * Math.Cos (RADIAN/2) +startx), (float) (radius + radius_in+starty)); Path.lineto ((float) (RADIUS * Math.Cos (RADIAN/2)-radius * Math.sin (radian) +startx), (float) (radius + radius * math.co        S (radian) +starty));  Path.lineto ((float) (RADIUS * Math.Cos (RADIAN/2)-radius_in * Math.Cos (RADIAN/2) +startx), (float) (RADIUS + radius_in        * Math.sin (RADIAN/2) +starty));        Path.lineto (StartX, (float) (Radius-radius * Math.sin (RADIAN/2) +starty)); Path.lineto (float) (RADIUS * Math.Cos (RADIAN/2)-radius_in * Math.sin (radian) +startx), (float) (Radius-radius * Mat        H.sin (RADIAN/2) +starty));        Path.close ();    Canvas.drawpath (path, mpaint); }

The method of angle turning arc

/** *     angle to radians     * @param degree     * @return * */    private float Degree2radian (float degree) {        return ( FLOAT) (Math.PI * degree/180);    }

Source

Android custom Controls--Company Chop Production