paint,canvas繪畫出來的各種形狀

package com.my.activity.graphic;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.graphics.Shader;
import android.os.Bundle;
import android.view.View;

import com.my.MainActivity;
import com.my.R;

/**
 * 各種類型的圖形
 *@author  owen
 *@2010-8-19
 *@下午04:05:07
 */

public class GraphicesActivity extends MainActivity {
    private static final String TAG = "**********GraphicesActivity.java*********";
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        /*設定ContentView為自訂的MyVieW*/
        MyView myView=new MyView(this);
        setContentView(myView);
    }
   
   
    /* 自訂繼承View 的MyView*/
    private class MyView extends View
    {
         public MyView(Context context){
            super(context) ;
         }
         /*重寫onDraw（）*/
         @Override
         protected void onDraw(Canvas canvas)
         {  
             super.onDraw(canvas);
             /*設定背景為白色*/
             canvas.drawColor(Color.WHITE);
              Paint paint=new Paint();
            
              /*去鋸齒*/
              paint.setAntiAlias(true);
              /*設定paint的顏色*/
              paint.setColor(Color.RED);
              /*設定paint的 style 為STROKE：空心*/
              paint.setStyle(Paint.Style.STROKE);
              /*設定paint的外框寬度*/
              paint.setStrokeWidth(1);

             
              /*畫一個空心圓形*/
              canvas.drawCircle(40, 40, 30, paint);
              /*畫一個空心正方形*/
              canvas.drawRect(10, 90, 70, 150, paint);
              /*畫一個空心長方形*/
              canvas.drawRect(10, 170, 70,200, paint);
              /*畫一個空心橢圓形*/
              RectF re=new RectF(10,220,70,250);
              canvas.drawOval(re, paint);

              /*畫一個空心三角形*/
              Path path=new Path();
              path.moveTo(10, 330);
              path.lineTo(70,330);
              path.lineTo(40,270);
              path.close();

              canvas.drawPath(path, paint);
              /*畫一個空心梯形*/
              Path path1=new Path();
              path1.moveTo(10, 410);
              path1.lineTo(70,410);
              path1.lineTo(55,350);
              path1.lineTo(25, 350);
              path1.close();
              canvas.drawPath(path1, paint);
             
              /*設定paint 的style為 FILL：實心*/
              paint.setStyle(Paint.Style.FILL);
              /*設定paint的顏色*/
              paint.setColor(Color.BLUE);
              /*畫一個實心圓*/
              canvas.drawCircle(120,40,30, paint);
              /*畫一個實心正方形*/
              canvas.drawRect(90, 90, 150, 150, paint);
              /*畫一個實心長方形*/
              canvas.drawRect(90, 170, 150,200, paint);
              /*畫一個實心橢圓*/
              RectF re2=new RectF(90,220,150,250);
              canvas.drawOval(re2, paint);
              /*畫一個實心三角形*/
              Path path2=new Path();
              path2.moveTo(90, 330);
              path2.lineTo(150,330);
              path2.lineTo(120,270);
              path2.close();
              canvas.drawPath(path2, paint);
              /*畫一個實心梯形*/
              Path path3=new Path();
              path3.moveTo(90, 410);
              path3.lineTo(150,410);
              path3.lineTo(135,350);
              path3.lineTo(105, 350);
              path3.close();
              canvas.drawPath(path3, paint);
              /*設定漸層色*/
              Shader mShader=new LinearGradient(0,0,100,100,
                      new int[]{Color.RED,Color.GREEN,Color.BLUE,Color.YELLOW},
                      null,Shader.TileMode.REPEAT);
              paint.setShader(mShader);
           

              /*畫一個漸層色圓*/
              canvas.drawCircle(200,40,30, paint);
              /*畫一個漸層色正方形*/
              canvas.drawRect(170, 90, 230, 150, paint);
              /*畫一個漸層色長方形*/
              canvas.drawRect(170, 170, 230,200, paint);
              /*畫一個漸層色橢圓*/
              RectF re3=new RectF(170,220,230,250);
              canvas.drawOval(re3, paint);
              /*畫一個漸層色三角形*/
              Path path4=new Path();
              path4.moveTo(170,330);
              path4.lineTo(230,330);
              path4.lineTo(200,270);
              path4.close();
              canvas.drawPath(path4, paint);
              /*畫一個漸層色梯形*/
              Path path5=new Path();
              path5.moveTo(170, 410);
              path5.lineTo(230,410);
              path5.lineTo(215,350);
              path5.lineTo(185, 350);
              path5.close();
              canvas.drawPath(path5, paint);
             
              /*寫字*/
              paint.setTextSize(24);
              canvas.drawText(getResources().getString(R.string.str_text1), 240, 50, paint);
              canvas.drawText(getResources().getString(R.string.str_text2), 240, 120, paint);
              canvas.drawText(getResources().getString(R.string.str_text3), 240, 190, paint);
              canvas.drawText(getResources().getString(R.string.str_text4), 240, 250, paint);
              canvas.drawText(getResources().getString(R.string.str_text5), 240, 320, paint);
              canvas.drawText(getResources().getString(R.string.str_text6), 240, 390, paint); 
         }
    }
}