自定义View练习2
来源：互联网 发布：淘宝便利店入口 编辑：程序博客网 时间：2024/05/07 05:23
package com.bwie.customview;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Picture;import android.util.AttributeSet;import android.view.View;/** * */public class ExerciseView extends View { Picture picture = new Picture(); private int mWidth; private int mHeight; public ExerciseView(Context context) { super(context); } public ExerciseView(Context context, AttributeSet attrs) { super(context, attrs); } public ExerciseView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas);// recording();// //1// picture.draw(canvas);// //2// canvas.drawPicture(picture,new RectF(0,0,picture.getWidth(),200));// //3// //包装成为Drawable// PictureDrawable drawable = new PictureDrawable(picture);// //设置绘制区域。 不会缩放// drawable.setBounds(0,0,picture.getWidth(),picture.getHeight());// drawable.draw(canvas); //bitmap绘制// Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.aaa);// canvas.drawBitmap(bitmap,new Matrix(),new Paint());// canvas.drawBitmap(bitmap,200,500,new Paint());// //显示在中间位置// canvas.translate(mWidth/2,mHeight/2);// //指定图片绘制区域// Rect src = new Rect(0,0,bitmap.getWidth()/2,bitmap.getHeight()/2);// //指定图片在屏幕上显示的区域// Rect dst = new Rect(0,0,200,400);// //绘制图片// canvas.drawBitmap(bitmap,src,dst,null);// //绘制文字// Paint painttext = new Paint();// painttext.setColor(Color.BLACK);// painttext.setStyle(Paint.Style.FILL);// painttext.setTextSize(50);// String str = "ABCDEFG";// //参数为 文本,基数x,基数y,画笔//// canvas.drawText(str,200,500,painttext);// //截取字符串,包左不包右// canvas.drawText(str,1,3,200,500,painttext);// //字符数组// // 参数为 (字符数组 起始坐标 截取长度 基线x 基线y 画笔)// char[]chars = "ABCDEFG".toCharArray();// canvas.drawText(chars,1,3,200,500,painttext);// //给每个字符都指定一个位置// String str = "SLOOP";// canvas.drawPosText(str,new float[]{// 100,100,// 200,200,// 300,300,// 400,400,// 500,500,//// },painttext); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mWidth = w; mHeight = h; } /** * 录制内容方法 */ private void recording() { //开始录制 Canvas canvas = picture.beginRecording(500, 500); //创建一个画笔 Paint paint = new Paint(); paint.setColor(Color.BLUE); paint.setStyle(Paint.Style.FILL); //在Canvas中具体操作 //位移 canvas.translate(250,250); //绘制一个圆 canvas.drawCircle(0,0,100,paint); picture.endRecording(); }}Path
package com.bwie.customview;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Path;import android.util.AttributeSet;import android.view.View;/** * * 路径类 */public class PathView extends View { private int mWidth; private int mHeight; private Paint mpaint; public PathView(Context context) { super(context); } public PathView(Context context, AttributeSet attrs) { super(context, attrs); } public PathView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //绘制文字 mpaint = new Paint(); mpaint.setColor(Color.BLACK); mpaint.setStyle(Paint.Style.STROKE); mpaint.setTextSize(10); // canvas.translate(mWidth/2,mHeight/2); // Path path = new Path(); // path.lineTo(200,200); // path.lineTo(200,0); // canvas.drawPath(path,mpaint); //moveTo // canvas.translate(mWidth/2,mHeight/2); // Path path = new Path(); // path.lineTo(200,200); // //moveTo只改变下次操作的起点 // path.moveTo(200,100); // path.lineTo(200,0); // canvas.drawPath(path,mpaint); //setLastPoint //重置上一次操作的最后一个点 // canvas.translate(mWidth/2,mHeight/2); // Path path = new Path(); // path.lineTo(200,200); // path.setLastPoint(200,100); // path.lineTo(200,0); // canvas.drawPath(path,mpaint); //close //close的作用是封闭路径,将图形封闭成一个完整的图形 // canvas.translate(mWidth / 2, mHeight / 2); // Path path = new Path(); // path.lineTo(200,200); // path.lineTo(200,0); // path.close(); // canvas.drawPath(path,mpaint); //addXxx // 第一类：添加基本图形 // canvas.translate(mWidth / 2, mHeight / 2); // Path path = new Path(); // //CW顺时针，CCW逆时针 // path.addRect(-200,-200,200,200, Path.Direction.CW); // path.setLastPoint(-300,300); // canvas.drawPath(path,mpaint); //第二类：Path // canvas.translate(mWidth / 2, mHeight / 2); // canvas.scale(1,-1);//翻转Y坐标轴 // // Path path = new Path(); // Path src = new Path(); // // path.addRect(-200,-200,200,200,Path.Direction.CW); // src.addCircle(0,0,100, Path.Direction.CW); // //包含 // path.addPath(src,0,200); // canvas.drawPath(path,mpaint); //第三类 addArc 与 arcTo 添加一个圆弧到path //addArc // canvas.translate(mWidth / 2, mHeight / 2); // canvas.scale(1, -1); // Path path = new Path(); // path.lineTo(100, 100); // // RectF oval = new RectF(0, 0, 300, 300); // path.addArc(oval, 0, 270); // //这个变量意思为“是否强制使用moveTo”，也就是说，是否使用moveTo将变量移动到圆弧的起点位移，也就意味着： // // path.arcTo(oval,0,270,true); //与上面一句作用等价 // canvas.drawPath(path, mpaint); //isEmpty、 isRect、isConvex、 set 和 offset //isEmpty 判断path中是否包含内容 // Path path = new Path(); // Log.e("1",path.isEmpty()+""); // // path.lineTo(100,100); // Log.e("2",path.isEmpty()+""); //log输出结果: // com.sloop.canvas E/1: true // com.sloop.canvas E/2: false //isRect 判断path是否是一个矩形，如果是一个矩形的话，会将矩形的信息存放进参数rect中。 // Path path = new Path(); // path.lineTo(0, 400); // path.lineTo(400, 400); // path.lineTo(400, 0); // path.lineTo(0, 0); // // RectF rect = new RectF(); // boolean b = path.isRect(rect); // Log.e("Rect", "isRect:" + b + "| left:" + rect.left + "| top:" + rect.top + "| right:" + rect.right + "| bottom:" + rect.bottom); // log 输出结果: // com.sloop.canvas E/Rect: isRect:true| left:0.0| top:0.0| right:400.0| bottom:400.0 //set 将新的path赋值到现有path。// canvas.translate(mWidth / 2, mHeight / 2); // 移动坐标系到屏幕中心// canvas.scale(1, -1); // <-- 注意 翻转y坐标轴//// Path path = new Path(); // path添加一个矩形// path.addRect(-200, -200, 200, 200, Path.Direction.CW);//// Path src = new Path(); // src添加一个圆// src.addCircle(0, 0, 100, Path.Direction.CW);//// path.set(src); // 大致相当于 path = src;//// canvas.drawPath(path, mpaint); //offset canvas.translate(mWidth / 2, mHeight / 2); // 移动坐标系到屏幕中心 canvas.scale(1,-1); Path path = new Path(); //添加一个圆形 path.addCircle(0,0,100, Path.Direction.CW); //添加一个矩形 Path dst = new Path(); dst.addRect(-200,-200,200,200, Path.Direction.CW); //从运行效果图可以看出，虽然我们在dst中添加了一个矩形，但是并没有表现出来，所以，当dst中存在内容时，dst中原有的内容会被清空，而存放平移后的path path.offset(300,0,dst); canvas.drawPath(path,mpaint); mpaint.setColor(Color.BLUE); canvas.drawPath(dst,mpaint); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mWidth = w; mHeight = h; }}import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Path;import android.util.AttributeSet;import android.view.View;/** * Created by 樊健翔 on 2017/9/29. * 创建雷达图 */public class RadarView extends View { private int count = 6; //数据个数 private float angle = (float) (Math.PI*2/count); private float radius; //网格最大半径 private int centerX; //中心X private int centerY; //中心Y private String[] titles = {"a","b","c","d","e","f"}; private double[] data = {100,60,60,60,100,50,10,20}; //各维度分值 private float maxValue = 100; //数据最大值 private Paint mainPaint; //雷达区画笔 private Paint valuePaint; //数据区画笔 private Paint textPaint; //文本画笔 public RadarView(Context context) { super(context); } public RadarView(Context context, AttributeSet attrs) { super(context, attrs); } public RadarView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { radius = Math.min(h, w)/2*0.9f; //中心坐标 centerX = w/2; centerY = h/2; postInvalidate(); super.onSizeChanged(w, h, oldw, oldh); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); mainPaint = new Paint(); valuePaint = new Paint(); textPaint = new Paint(); mainPaint.setColor(Color.BLACK); //只描边 mainPaint.setStyle(Paint.Style.STROKE); //修改宽度 mainPaint.setStrokeWidth(10); valuePaint.setColor(Color.BLUE); valuePaint.setStyle(Paint.Style.FILL_AND_STROKE); textPaint.setTextSize(26); textPaint.setColor(Color.BLACK); //调用方法 drawPolygon(canvas); drawLines(canvas); drawText(canvas); drawRegion(canvas); } /** * 绘制正多边形 */ private void drawPolygon(Canvas canvas){ Path path = new Path(); float r = radius / (count - 1);//r是蜘蛛丝之间的间距,每一个六边形之间的间距 for (int i=1;i=0&&angle*i<=Math.PI/2){//第4象限 canvas.drawText(titles[i], x,y,textPaint); }else if(angle*i>=3*Math.PI/2&&angle*i<=Math.PI*2){//第3象限 canvas.drawText(titles[i], x,y,textPaint); }else if(angle*i>Math.PI/2&&angle*i<=Math.PI){//第2象限 float dis = textPaint.measureText(titles[i]);//文本长度 canvas.drawText(titles[i], x-dis,y,textPaint); }else if(angle*i>=Math.PI&&angle*i<3*Math.PI/2){//第1象限 float dis = textPaint.measureText(titles[i]);//文本长度 canvas.drawText(titles[i], x-dis,y,textPaint); } } } /** * 绘制区域 * @param canvas */ private void drawRegion(Canvas canvas){ Path path = new Path(); valuePaint.setAlpha(255); for(int i=0;i 阅读全文
1 0
- 自定义View练习2
- 自定义 view 练习(2)：卫星式菜单
- 自定义View小练习
- 自定义View练习
- 自定义View练习
- 自定义View练习
- 自定义View练习
- 自定义View练习
- 自定义View练习一
- 自定义view-canvas练习
- 自定义View练习1
- android自定义View练习之波浪View
- Android 自定义View练习之水波纹
- 自定义View练习（一）饼状图
- 自定义View练习（二）二阶贝塞尔曲线
- HenCoder 自定义 View 1-1 练习项目
- 新手自定义view练习实例之（二） 波浪view
- 自定义View练习（一个自定义的折线图）
- deep learning学习笔记---MemN2N
- 斑马斑马
- 立个flag
- 部署Django项目
- idea导入struts2架包
- 自定义View练习2
- input type=radio ios点击后黑色背景的解决
- XRecyclerView 多条目加载
- ObjectARX反应器概述
- 提升自旋锁spinlock的性能-pause指令
- Struts2学习(二)【Struts2访问流程】
- css 文字超出部分使用...代替
- 在阿里云服务器上安装配置svn
- easyBCD修改系统启动项
