自定义各种图形

MainActivity:
package com.example.lainxidraw;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;

public class MainActivity extends Activity {
 public static String name1;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  Intent intent = getIntent();
  name1 = intent.getStringExtra("aaa");
  setContentView(R.layout.activity_main);
 }

}

ShouActivity:
package com.example.lainxidraw;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class ShouActivity extends Activity {
 private Button btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_shou);
  btn1 = (Button) findViewById(R.id.btn1);
  btn2 = (Button) findViewById(R.id.btn2);
  btn3 = (Button) findViewById(R.id.btn3);
  btn4 = (Button) findViewById(R.id.btn4);
  btn5 = (Button) findViewById(R.id.btn5);
  btn6 = (Button) findViewById(R.id.btn6);
  btn7 = (Button) findViewById(R.id.btn7);
  btn8 = (Button) findViewById(R.id.btn8);
  btn1.setOnClickListener(l);
  btn2.setOnClickListener(l);
  btn3.setOnClickListener(l);
  btn4.setOnClickListener(l);
  btn5.setOnClickListener(l);
  btn6.setOnClickListener(l);
  btn7.setOnClickListener(l);
  btn8.setOnClickListener(l);
 }
 OnClickListener l = new OnClickListener() {
  @Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub
   Intent intent = new Intent(ShouActivity.this,MainActivity.class);
   switch (arg0.getId()) {
   case R.id.btn1:
    intent.putExtra("aaa", btn1.getText());
    startActivity(intent);
    break;
   case R.id.btn2:
    intent.putExtra("aaa", btn2.getText());
    startActivity(intent);
    break;
   case R.id.btn3:
    intent.putExtra("aaa", btn3.getText());
    startActivity(intent);
    break;
   case R.id.btn4:
    intent.putExtra("aaa", btn4.getText());
    startActivity(intent);
    break;
   case R.id.btn5:
    intent.putExtra("aaa", btn5.getText());
    startActivity(intent);
    break;
   case R.id.btn6:
    intent.putExtra("aaa", btn6.getText());
    startActivity(intent);
    break;
   case R.id.btn7:
    intent.putExtra("aaa", btn7.getText());
    startActivity(intent);
    break;
   case R.id.btn8:
    intent.putExtra("aaa", btn8.getText());
    startActivity(intent);
    break;
   }
  }
 };
}
MyView:
package com.example.view;

import com.example.lainxidraw.MainActivity;

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.util.AttributeSet;
import android.util.Log;

public class MyView extends View{
 private Paint p;
 public String name = MainActivity.name1;
 public View(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
  // TODO Auto-generated constructor stub
 }
 public View(Context context, AttributeSet attrs) {
  super(context, attrs);
  // TODO Auto-generated constructor stub
 }
 public View(Context context) {
  super(context);
  // TODO Auto-generated constructor stub
 }
 @Override
 protected void onDraw(Canvas canvas) {
  // TODO Auto-generated method stub
  super.onDraw(canvas);
  Log.i("aaa", name);
  draw(name,canvas);
 }
 public void draw(String name,Canvas canvas){
  p = new Paint();
  if(name.equals("画圆")){
   p.setColor(Color.RED);
   canvas.drawText("画圆：", 10, 20, p);
   //x.y.直径.画笔
   canvas.drawCircle(60, 20, 10, p);
   p.setAntiAlias(true);
   canvas.drawCircle(120, 20, 20, p);
  }else if(name.equals("画线及弧形")){
   canvas.drawText("画线及弧线：", 10, 60, p);  
   p.setColor(Color.GREEN);
   //起始X.Y.结束X.Y.画笔
   canvas.drawLine(60, 40, 150, 20, p);
   canvas.drawLine(110, 40, 190, 80, p);
   
   p.setStyle(Paint.Style.STROKE);
   RectF oval1=new RectF(150,20,180,40);
   canvas.drawArc(oval1, 180, 180, false, p);
   oval1.set(190, 20, 220, 40);
   canvas.drawArc(oval1, 180, 180, false, p);
   oval1.set(160, 30, 210, 60);
   canvas.drawArc(oval1, 0, 180, false, p);
  }else if(name.equals("画矩形")){
   canvas.drawText("画矩形：", 10, 80, p);  
   p.setColor(Color.GRAY);
   p.setStyle(Paint.Style.FILL);
   //X-左，Y-上，X-右，Y-下距离
   canvas.drawRect(60, 60, 80, 80, p);
   canvas.drawRect(60, 90, 160, 150, p);
  }else if(name.equals("画扇形和椭圆")){
   canvas.drawText("画扇形和椭圆:", 10, 120, p);  
   Shader mShader = new LinearGradient(0, 0, 100, 100,new int[]{ Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW,Color.LTGRAY }, null, Shader.TileMode.REPEAT);
   p.setShader(mShader);  
   RectF oval2 = new RectF(60, 100, 200, 240);
   canvas.drawArc(oval2, 200, 130, true, p);
   oval2.set(210,100,250,130);  
   canvas.drawOval(oval2, p);
  }else if(name.equals("画三角形")){
   canvas.drawText("画三角形：", 10, 200, p);
   Path path = new Path();
   path.moveTo(80, 200);
   path.lineTo(120, 250);
   path.lineTo(80, 250);
   path.close();
   canvas.drawPath(path, p);
   p.reset();
   //设置空心
   p.setStyle(Paint.Style.STROKE);
   Path path2 = new Path();
   path2.moveTo(180, 200);
   path2.lineTo(200, 200);
   path2.lineTo(210, 210);
   path2.lineTo(200, 220);
   path2.lineTo(180, 220);
   path2.lineTo(170, 210);
   path2.close();
   canvas.drawPath(path2, p);
  }else if(name.equals("画圆角矩形")){
   //充满
   p.setStyle(Paint.Style.FILL);
   p.setColor(Color.LTGRAY);
   p.setAntiAlias(true);
   canvas.drawText("画园角矩形", 10, 260, p);
   RectF rectF = new RectF(80,260,200,300);
   canvas.drawRoundRect(rectF, 80, 80, p);
  }else if(name.equals("画贝赛尔曲线")){
   p.reset();
   p.setStyle(Paint.Style.STROKE);
   p.setColor(Color.GREEN);
   canvas.drawText("画贝塞尔曲线", 10, 260, p);
   Path path3 = new Path();
   path3.moveTo(100, 320);
   path3.quadTo(150, 310, 170, 400);
   canvas.drawPath(path3, p);
  }else if(name.equals("画点")){
   p.setStyle(Paint.Style.FILL);
   canvas.drawText("画点", 10, 390, p);
   canvas.drawPoint(69, 390, p);
   canvas.drawPoints(new float[]{60,400,65,400,70,400}, p);
  }
 }
}