本文实例通过前面学过的Paint、Canvas等2D绘画技术来实现在手机屏幕上绘制Android机器人。

具体代码实现和效果：

用来显示自定义的绘图类的布局文件
res/layout/main.xml:

<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/frameLayout1" android:orientation="vertical" > </FrameLayout>

打开MainActivity，在文件中创建名为MyView的内部类，继承android.view.View类，并添加构造方法和重写onDraw(Canvas canvas)方法,在里面进行作图：

MainActivity:

package com.example.test; import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; import android.os.Bundle; import android.view.View; import android.widget.FrameLayout; public class MainActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //获取布局文件中添加的帧布局管理器 FrameLayout ll=(FrameLayout)findViewById(R.id.frameLayout1); //将自定义的MyView视图添加到帧布局 ll.addView(new MyView(this)); } public class MyView extends View{ public MyView(Context context) { super(context); // TODO Auto-generated constructor stub } @Override protected void onDraw(Canvas canvas) { Paint paint=new Paint(); paint.setAntiAlias(true);//使用抗锯齿功能 paint.setColor(Color.GREEN); //绘制机器人的头 RectF rectf_head=new RectF(10,10,100,100); rectf_head.offset(100, 20);//设置在X轴上偏移100像素，Y轴上偏移20像素 canvas.drawArc(rectf_head, -10, -160, false, paint);//绘制弧 //绘制眼睛 paint.setColor(Color.WHITE); canvas.drawCircle(135, 53, 4, paint);//绘制圆 canvas.drawCircle(175, 53, 4, paint);//绘制圆 paint.setColor(Color.GREEN); //绘制天线 paint.setStrokeWidth(2);//设置触笔的宽度 canvas.drawLine(120, 15, 135, 35, paint);//绘制线 canvas.drawLine(190, 15, 175, 35, paint);//绘制线 //绘制身体 canvas.drawRect(110,75,200,150, paint);//绘制矩形 RectF rectf_body=new RectF(110,140,200,160); canvas.drawRoundRect(rectf_body, 10, 10, paint);//绘制圆角矩形 //绘制胳膊 RectF rectf_arm=new RectF(85,75,105,140); canvas.drawRoundRect(rectf_arm, 10, 10, paint); rectf_arm.offset(120, 0);//设置在X轴上偏移120像素 canvas.drawRoundRect(rectf_arm, 10, 10, paint); //绘制腿 RectF rectf_leg=new RectF(125,150,145,200); canvas.drawRoundRect(rectf_leg, 10, 10, paint); rectf_leg.offset(40, 0);//设置在X轴上偏移40像素 canvas.drawRoundRect(rectf_leg, 10, 10, paint); super.onDraw(canvas); } } }

画出的效果如图

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。