Android自定义view仿淘宝快递物流信息时间轴

学了Android有一段时间了，一直没有时间写博客，趁着周末有点空，就把自己做的一些东西写下来． 一方面锻炼一下自己的写文档的能力，另一方面分享代码的同时也希望能与大家交流一下技术，共同学习，共同进步．

废话不多少说，我们先来看看我们自定义view要实现的效果:

效果图

自定义属性

onDraw方法

关键方法，写了大量的代码注释，希望大家能看明白。

@Override
 protected void onDraw(Canvas canvas) {
  //默认设置时间轴的位置位于view的中间
  viewWidth = getMeasuredWidth() / 2;
  //设置第一个节点的颜色
  mPaint.setColor(timelineHeadColor);
  
  for (int j = 1; j <= timelineCount; j++) {

   
   if (j == 1) {
    //画笔设置为空心
    canvas.drawCircle(viewWidth, timelineHeadRadius + marginTop, timelineRadius, mPaint);
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeWidth(5.0f);
    //画第一个节点外围的圆环
    canvas.drawCircle(viewWidth, timelineHeadRadius + marginTop, timelineHeadRadius, mPaint);
    //设置画笔颜色，画其他时间节点的颜色
    mPaint.setColor(timelineOtherColor);
    //画笔设置为实心
    mPaint.setStyle(Paint.Style.FILL);
    
    canvas.drawRect(new Rect(viewWidth - timelineWidth / 2, (int) (2 * timelineHeadRadius + marginTop) + 5, viewWidth + timelineWidth / 2, (int) (2 * timelineHeadRadius + timelineRadiusDistance + marginTop + 5)), mPaint);
    continue;
   }
   
   canvas.drawCircle(viewWidth, (2 * timelineRadius + timelineRadiusDistance) * (j - 1) + 2 * timelineHeadRadius - timelineRadius + marginTop, timelineRadius, mPaint);
   

   canvas.drawRect(new Rect(viewWidth - timelineWidth / 2, (int) (j * (2 * timelineRadius + timelineRadiusDistance) - timelineRadiusDistance + 2 * (timelineHeadRadius - timelineRadius) + marginTop), viewWidth + timelineWidth / 2, (int) (j * (2 * timelineRadius + timelineRadiusDistance) + 2 * (timelineHeadRadius - timelineRadius) + marginTop)), mPaint);
  }
 }

最后附上全部代码

package com.demo.zes.timelinedemo;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;


public class TimeLineView extends View {


 private Paint mPaint;
 
 private float timelineHeadRadius;
 
 private int timelineHeadColor;
 
 private int timelineOtherColor;
 
 private int timelineCount;
 
 private int viewWidth;
 
 private int marginTop;
 
 private int timelineRadius;
 
 private int timelineRadiusDistance;
 
 private int timelineWidth;
 
 private float timeLineViewHeight;

 public TimeLineView(Context context) {
  this(context, null);
 }

 public TimeLineView(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
 }

 public TimeLineView(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
  init(context, attrs, defStyle);
 }

 
 private void init(Context context, AttributeSet attrs, int defStyle) {

  final TypedArray a = getContext().obtainStyledAttributes(
    attrs, R.styleable.TimeLineView, defStyle, 0);
  timelineRadiusDistance = (int) a.getDimension(R.styleable.TimeLineView_timelineRadiusDistance, convertDIP2PX(context, 20));
  timelineHeadRadius = a.getDimension(R.styleable.TimeLineView_timelineHeadRadius, convertDIP2PX(context, 10));
  timelineRadius = (int) a.getDimension(R.styleable.TimeLineView_timelineRadius, convertDIP2PX(context, 5));
  timelineHeadColor = a.getColor(R.styleable.TimeLineView_timelineHeadColor, Color.parseColor("#73be36"));
  timelineOtherColor = a.getColor(R.styleable.TimeLineView_timelineOtherColor, Color.parseColor("#e0e0e0"));
  timelineCount = a.getInteger(R.styleable.TimeLineView_timelineCount, 0);
  timelineWidth = (int) a.getDimension(R.styleable.TimeLineView_timelineWidth, convertDIP2PX(context, 1));
  marginTop = (int) a.getDimension(R.styleable.TimeLineView_timelineMarginTop, convertDIP2PX(context, 50));
  a.recycle();

  mPaint = new Paint();
  mPaint.setAntiAlias(true);

 }


 @Override
 protected void onDraw(Canvas canvas) {
  //默认设置时间轴的位置位于view的中间
  viewWidth = getMeasuredWidth() / 2;
  //设置第一个节点的颜色
  mPaint.setColor(timelineHeadColor);
  
  for (int j = 1; j <= timelineCount; j++) {

   
   if (j == 1) {
    //画笔设置为空心
    canvas.drawCircle(viewWidth, timelineHeadRadius + marginTop, timelineRadius, mPaint);
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeWidth(5.0f);
    //画第一个节点外围的圆环
    canvas.drawCircle(viewWidth, timelineHeadRadius + marginTop, timelineHeadRadius, mPaint);
    //设置画笔颜色，画其他时间节点的颜色
    mPaint.setColor(timelineOtherColor);
    //画笔设置为实心
    mPaint.setStyle(Paint.Style.FILL);
    
    canvas.drawRect(new Rect(viewWidth - timelineWidth / 2, (int) (2 * timelineHeadRadius + marginTop) + 5, viewWidth + timelineWidth / 2, (int) (2 * timelineHeadRadius + timelineRadiusDistance + marginTop + 5)), mPaint);
    continue;
   }
   
   canvas.drawCircle(viewWidth, (2 * timelineRadius + timelineRadiusDistance) * (j - 1) + 2 * timelineHeadRadius - timelineRadius + marginTop, timelineRadius, mPaint);
   

   canvas.drawRect(new Rect(viewWidth - timelineWidth / 2, (int) (j * (2 * timelineRadius + timelineRadiusDistance) - timelineRadiusDistance + 2 * (timelineHeadRadius - timelineRadius) + marginTop), viewWidth + timelineWidth / 2, (int) (j * (2 * timelineRadius + timelineRadiusDistance) + 2 * (timelineHeadRadius - timelineRadius) + marginTop)), mPaint);
  }
 }

 public float getTimelineHeadRadius() {
  return timelineHeadRadius;
 }

 public void setTimelineHeadRadius(float timelineHeadRadius) {

  this.timelineHeadRadius = timelineHeadRadius;
  invalidate();
 }

 public int getTimelineHeadColor() {
  return timelineHeadColor;
 }

 public void setTimelineHeadColor(int timelineHeadColor) {

  this.timelineHeadColor = timelineHeadColor;
  invalidate();
 }

 public int getTimelineOtherColor() {
  return timelineOtherColor;
 }

 public void setTimelineOtherColor(int timelineOtherColor) {
  this.timelineOtherColor = timelineOtherColor;
  invalidate();
 }

 public int getTimelineCount() {
  return timelineCount;
 }

 public void setTimelineCount(int timelineCount) {
  this.timelineCount = timelineCount;
  invalidate();
 }

 public int getMarginTop() {
  return marginTop;
 }

 public void setMarginTop(int marginTop) {

  this.marginTop = marginTop;
  invalidate();
 }

 public int getTimelineRadius() {
  return timelineRadius;
 }

 public void setTimelineRadius(int timelineRadius) {

  this.timelineRadius = timelineRadius;
  invalidate();
 }

 public int getTimelineRadiusDistance() {
  return timelineRadiusDistance;
 }

 public void setTimelineRadiusDistance(int timelineRadiusDistance) {

  this.timelineRadiusDistance = timelineRadiusDistance;
  invalidate();
 }

 public int getTimelineWidth() {
  return timelineWidth;
 }

 public void setTimelineWidth(int timelineWidth) {
  this.timelineWidth = timelineWidth;
 }

 public float getTimeLineViewHeight() {
  this.timeLineViewHeight = getMarginTop() + getTimelineCount() * (2 * getTimelineRadius() + getTimelineRadiusDistance());
  return timeLineViewHeight;
 }

 public void setTimeLineViewHeight(float timeLineViewHeight) {
  this.timeLineViewHeight = timeLineViewHeight;
  invalidate();

 }

 public int getViewWidth() {
  return viewWidth;
 }

 public void setViewWidth(int viewWidth) {
  this.viewWidth = viewWidth;
  invalidate();
 }

 
 public static int convertDIP2PX(Context context, int dip) {
  float scale = context.getResources().getDisplayMetrics().density;
  return (int) (dip * scale + 0.5f * (dip >= 0 ? 1 : -1));
 }

}

附上Github链接 TimeLineDemo

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。