Android绘制机器人小实例

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:

 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考高分网。