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- package com.canvas;
-
- 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.view.View;
-
- /**
- * .
- */
- public class MyView extends View {
- public MyView(Context context,AttributeSet set) {
- super(context,set);
- }
-
- // 重写该方法,进行绘图
- @Override
- protected void onDraw(Canvas canvas)
- {
- super.onDraw(canvas);
- // 把整张画布绘制成白色
- canvas.drawColor(Color.WHITE);
- Paint paint = new Paint();
- // 去锯齿
- paint.setAntiAlias(true);
- paint.setColor(Color.BLUE);
- paint.setStyle(Paint.Style.STROKE);
- paint.setStrokeWidth(3);
- // 绘制圆形
- canvas.drawCircle(40, 40, 30, paint);
- // 绘制正方形
- canvas.drawRect(10, 80, 70, 140, paint);
- // 绘制矩形
- canvas.drawRect(10, 150, 70, 190, paint);
- RectF re1 = new RectF(10, 200, 70, 230);
- // 绘制圆角矩形
- canvas.drawRoundRect(re1, 15, 15, paint);
- RectF re11 = new RectF(10, 240, 70, 270);
- // 绘制椭圆
- canvas.drawOval(re11, paint);
- // 定义一个Path对象,封闭成一个三角形。
- Path path1 = new Path();
- path1.moveTo(10, 340);
- path1.lineTo(70, 340);
- path1.lineTo(40, 290);
- path1.close();
- // 根据Path进行绘制,绘制三角形
- canvas.drawPath(path1, paint);
- // 定义一个Path对象,封闭成一个五角形。
- Path path2 = new Path();
- path2.moveTo(26, 360);
- path2.lineTo(54, 360);
- path2.lineTo(70, 392);
- path2.lineTo(40, 420);
- path2.lineTo(10, 392);
- path2.close();
- // 根据Path进行绘制,绘制五角形
- canvas.drawPath(path2, paint);
- // ----------设置填充风格后绘制----------
- paint.setStyle(Paint.Style.FILL);
- paint.setColor(Color.RED);
- canvas.drawCircle(120, 40, 30, paint);
- //绘制正方形
- canvas.drawRect(90, 80, 150, 140, paint);
- //绘制矩形
- canvas.drawRect(90, 150, 150, 190, paint);
- RectF re2 = new RectF(90, 200, 150, 230);
- //绘制圆角矩形
- canvas.drawRoundRect(re2, 15, 15, paint);
- RectF re21 = new RectF(90, 240, 150, 270);
- // 绘制椭圆
- canvas.drawOval(re21, paint);
- Path path3 = new Path();
- path3.moveTo(90, 340);
- path3.lineTo(150, 340);
- path3.lineTo(120, 290);
- path3.close();
- //绘制三角形
- canvas.drawPath(path3, paint);
- Path path4 = new Path();
- path4.moveTo(106, 360);
- path4.lineTo(134, 360);
- path4.lineTo(150, 392);
- path4.lineTo(120, 420);
- path4.lineTo(90, 392);
- path4.close();
- //绘制五角形
- canvas.drawPath(path4, paint);
- // ----------设置渐变器后绘制----------
- // 为Paint设置渐变器
- Shader mShader = new LinearGradient(0, 0, 40, 60
- , new int[] {
- Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW }
- , null , Shader.TileMode.REPEAT);
- paint.setShader(mShader);
- //设置阴影
- paint.setShadowLayer(45 , 10 , 10 , Color.GRAY);
- // 绘制圆形
- canvas.drawCircle(200, 40, 30, paint);
- // 绘制正方形
- canvas.drawRect(170, 80, 230, 140, paint);
- // 绘制矩形
- canvas.drawRect(170, 150, 230, 190, paint);
- RectF re3 = new RectF(170, 200, 230, 230);
- // 绘制圆角矩形
- canvas.drawRoundRect(re3, 15, 15, paint);
- RectF re31 = new RectF(170, 240, 230, 270);
- // 绘制椭圆
- canvas.drawOval(re31, paint);
- Path path5 = new Path();
- path5.moveTo(170, 340);
- path5.lineTo(230, 340);
- path5.lineTo(200, 290);
- path5.close();
- // 根据Path进行绘制,绘制三角形
- canvas.drawPath(path5, paint);
- Path path6 = new Path();
- path6.moveTo(186, 360);
- path6.lineTo(214, 360);
- path6.lineTo(230, 392);
- path6.lineTo(200, 420);
- path6.lineTo(170, 392);
- path6.close();
- // 根据Path进行绘制,绘制五角形
- canvas.drawPath(path6, paint);
- // ----------设置字符大小后绘制----------
- paint.setTextSize(24);
- paint.setShader(null);
-
- }
- }
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