Draw 画图

package com.amaker.test; import android.app.Activity; 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; public class Main extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(new MyView(this)); } /** * 创建一个View类 * * @author lilin * @date 2011-9-5 下午05:18:47 * @ClassName: MyView * @Description: TODO */ private class MyView extends View { public MyView(Context context) { super(context); } @Override protected void onDraw(Canvas canvas) { // 重写onDraw()方法 super.onDraw(canvas); canvas.drawColor(Color.WHITE);// 设置画布的颜色为白色 /* -----------------画空心图 ------------------------ */ Paint paint = new Paint();// 实例化画笔 paint.setAntiAlias(true); paint.setColor(Color.GREEN); paint.setStyle(Paint.Style.STROKE);// 设置样式 paint.setStrokeWidth(3);// 设置粗细 canvas.drawCircle(40, 40, 30, paint);// 画圆 canvas.drawRect(10, 90, 70, 150, paint);// 画矩形 canvas.drawRect(10, 170, 70, 200, paint);// 画矩形 RectF re = new RectF(10, 220, 70, 250);// 声明矩形 canvas.drawOval(re, paint);// 画椭圆 // 画一个三角形 Path path = new Path();// 实例化路径 path.moveTo(10, 330);// 移动到指定的点 path.lineTo(70, 330);// 画线 path.lineTo(40, 270);// 画线 path.close();// 关闭路径 canvas.drawPath(path, paint);// 画路径 // 画一个梯形 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); /* -----------------画实心图 ------------------------ */ paint.setStyle(Paint.Style.FILL); paint.setColor(Color.RED); canvas.drawCircle(120, 40, 30, paint); canvas.drawRect(90, 90, 150, 150, paint); canvas.drawRect(90, 170, 150, 200, paint); RectF re2 = new RectF(90, 220, 150, 250); canvas.drawOval(re2, paint); Path path2 = new Path(); path2.moveTo(90, 330); path2.lineTo(150, 330); path2.lineTo(120, 270); path2.close(); canvas.drawPath(path2, paint); 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); /* -----------------画渲染图 ------------------------ */ Shader mShader = new LinearGradient(0, 0, 100, 100, new int[] { Color.GREEN, Color.RED, Color.BLUE, Color.YELLOW }, null, Shader.TileMode.REPEAT);// 线性渲染 paint.setShader(mShader);// 为画笔设置线性渲染 canvas.drawCircle(200, 40, 30, paint); canvas.drawRect(170, 90, 230, 150, paint); canvas.drawRect(170, 170, 230, 200, paint); RectF re3 = new RectF(170, 220, 230, 250); canvas.drawOval(re3, paint); Path path4 = new Path(); path4.moveTo(170, 330); path4.lineTo(230, 330); path4.lineTo(200, 270); path4.close(); canvas.drawPath(path4, paint); 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); /* -----------------写字 ------------------------ */ paint.setTextSize(24); canvas.drawText("Circle", 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); } } }