Android学习笔记绘制几何图形

概述案例绘制一个安卓机器人activity_main.xml布局就一个frameLayout，省略掉MainActivity.java@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 案例绘制一个安卓机器人

activity_main.xml布局就一个frameLayout，省略掉
MainActivity.java

    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        //获取帧布局管理器        FrameLayout frameLayout = findVIEwByID(R.ID.frameLayout);        frameLayout.addVIEw(new MyVIEw(this));//将自定义view添加到布局管理器中    }

MyVIEw.java

import androID.content.Context;import androID.graphics.Canvas;import androID.graphics.Paint;import androID.graphics.RectF;import androID.vIEw.VIEw;public class MyVIEw extends VIEw {     public MyVIEw(Context context) {        super(context);    }    @OverrIDe    protected voID onDraw(Canvas canvas) {        super.onDraw(canvas);        /**绘制AndroID机器人**/        Paint paint = new Paint();//创建一个画笔        paint.setAntiAlias(true);//采用锯齿功能        paint.setcolor(0xFFA4C739);//设置画笔的颜色为绿色        //绘制机器人的头        RectF rectF = new RectF(10,10,100,100);//定义外轮廓矩形        rectF.offset(90,20);        canvas.drawArc(rectF,-10,-160,false,paint);//绘制弧形        //绘制眼睛        paint.setcolor(0xFFFFFFFF);//设置画笔为白色        canvas.drawCircle(165,53,4,paint);//绘制圆        canvas.drawCircle(125,53,4,paint);//绘制圆        //绘制天线        paint.setcolor(0xFFA4C739);        paint.setstrokeWIDth(2);//设置笔触的宽度        canvas.drawline(110,15,                125,35,paint);        canvas.drawline(180,15,                165,35,paint);//绘制线        //绘制身体        canvas.drawRect(100,75,                190,150,paint);        RectF rectF_body = new RectF(100,140,                190,160);        canvas.drawRoundRect(rectF_body,10,                10,paint);//绘制圆角矩形        //绘制胳膊        RectF rectF_arm = new RectF(75,75,                95,140);        canvas.drawRoundRect(rectF_arm,10,                10,paint);//绘制圆角矩形        rectF_arm.offset(120,0);        canvas.drawRoundRect(rectF_arm,10,10,paint);//绘制圆角矩形        //绘制腿        RectF rectF_leg = new RectF(115,150,                135,200);        canvas.drawRoundRect(rectF_leg,10,10,paint);        rectF_leg.offset(40,0);        canvas.drawRoundRect(rectF_leg,10,10,paint);     }}

效果:

总结

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