Android programming development uses path to draw basic graphics (circles, rectangles, ellipses, triangles, etc.) in canvas _android

Source: Internet
Author: User
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This article is an example of how Android programming developed a way to draw basic graphics using path in canvas. Share to everyone for your reference, specific as follows:

To draw a basic set of graphics in Android, this program is a custom view component that rewrites the OnDraw (Canvase) method of the view component, and then draws a large number of basic collection graphics on the canvas.

Directly on the code:

1. Custom View Component code:

Package com.infy.configuration;
Import Android.content.Context;
Import Android.util.AttributeSet;
Import Android.view.View;
    public class MyView extends view{public myview (context, AttributeSet attrs) {Super (context, attrs); @Override protected void OnDraw (Canvas Canvas) {//TODO auto-generated method Stub Super.ondraw (
      Draw the entire canvas into a white canvas.drawcolor (color.white);
      Paint Paint = new Paint ();
      Sawtooth Paint.setantialias (TRUE);
      Paint.setcolor (Color.Blue);
      Paint.setstyle (Paint.Style.STROKE);
      Paint.setstrokewidth (3);
      Draw round Canvas.drawcircle (n, paint);
      Draw Square Canvas.drawrect (ten, N, 140, paint); Draws a rectangular canvas.drawrect (10, 190, paint);
      RECTF rel = new RECTF (10,240,70,270);
      Draw Elliptical Canvas.drawoval (rel, paint);
      Defines a path object that closes a triangle path path1 = new Path ();
      Path1.moveto (10, 340);
      Path1.lineto (70, 340);
      Path1.lineto (40, 290);
      Path1.close ();
      Draw the Triangle Canvas.drawpath (path1, paint) according to Path;
      Defines a path object that closes a pentagram path path2 = new Path ();
      Path2.moveto (27, 360);
      Path2.lineto (54, 360);
      Path2.lineto (70, 392);
      Path2.lineto (40, 420);
      Path2.lineto (10, 392);
      Path2.close ();
      Drawing according to path, drawing the pentagram Canvas.drawpath (path2, paint);
      After setting the style of the fill bundle, Draw Paint.setstyle (Paint.Style.FILL);
      Paint.setcolor (;
      Canvas.drawcircle (paint);
      Draw a square canvas.drawrect (140, paint);
      Draw rectangular Canvas.drawrect (n, 190, paint);
      Draw Rounded Rectangle RECTF Re2 = new RECTF (90,200,150,230);
 Canvas.drawroundrect (Re2, paint);     Draw Ellipse RECTF re21 = new RECTF (90, 240, 150, 270);
      Canvas.drawoval (RE21, paint);
      Path path3 = new Path ();
      Path3.moveto (90, 340);
      Path3.lineto (150, 340);
      Path3.lineto (120, 290);
      Path3.close ();
      Draw triangular Canvas.drawpath (path3,paint);
      Draw the five-angled path Path4 = new Path ();
      Path4.moveto (106, 360);
      Path4.lineto (134, 360);
      Path4.lineto (150, 392);
      Path4.lineto (120, 420);
      Path4.lineto (90, 392);
      Path4.close ();
      Canvas.drawpath (Path4, paint); Set gradient after setting the gradient Shader Mshasder = new LinearGradient (0, 0, paint, new Int[]{,,co Lor.
      Blue,color.yellow}, NULL, Shader.TileMode.REPEAT);
      Paint.setshader (Mshasder);
      Set Shadow Paint.setshadowlayer (A, color.gray);
      Draw round Canvas.drawcircle (n, paint);
      Draw Square Canvas.drawrect (170, 230, 140, paint); Draw rectangular Canvas.drawrect (170, 230, 190, PaiNT);
      Rectangle that draws rounded corners rectf re31 = new RECTF ();
      Canvas.drawroundrect (re31, paint);
      Draw Ellipse RECTF re32 =new RECTF ();
      Canvas.drawoval (re32, paint);
      According to path, draw the triangular path Path5 = new Path ();
      Path5.moveto (170, 340);
      Path5.lineto (230, 340);
      Path5.lineto (200, 290);
      Path5.close ();
      Canvas.drawpath (Path5, paint);
      According to Path, draw the five-corner path PATH6 = new Path ();
      Path6.moveto (186, 360);
      Path6.lineto (214, 360);
      Path6.lineto (230, 392);
      Path6.lineto (200, 420);
      Path6.lineto (170, 392);
      Path6.close ();
    Canvas.drawpath (Path6, paint);


2. Use a basic activity to implement custom MyView components,

Define a Zidingyiviewtes activity:

Package com.infy.configuration;
Import Android.os.Bundle;
public class Zidingyiviewtes extends activity{
    private myview myview =null;
    protected void onCreate (Bundle savedinstancestate) {
      //TODO auto-generated method stub
      Super.oncreate (savedinstancestate);
      MyView = new MyView (this, null);
      Setcontentview (MyView);

Android's canvas can either draw simple collection graphics or draw a bitmap directly onto the canvas.
Finally attach the effect diagram (one more ellipse):

I hope this article will help you with the Android program.

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