Android自定义view仿淘宝快递物流信息时间轴

<resources>
 <declare-styleable name="TimeLineView">
  <attr name="timelineRadius" format="dimension" />
  <attr name="timelineHeadRadius" format="dimension" />
  <attr name="timelineHeadColor" format="color" />
  <attr name="timelineOtherColor" format="color" />
  <attr name="timelineRadiusDistance" format="dimension" />
  <attr name="timelineCount" format="integer" />
  <attr name="timelineMarginTop" format="dimension" />
  <attr name="timelineWidth" format="dimension" />
 </declare-styleable>
</resources>

@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);
  /**
   * 根据时间轴的节点数目，画对应的节点和轴
   */
  for (int j = 1; j <= timelineCount; j++) {

   /**
    * 当j==1，画第一个节点的时候，有点特殊，我们需要在节点的外面再换一个圆环
    */
   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);
    /**
     * 画第一个节点下面的轴
     */
    canvas.drawRect(new Rect(viewWidth - timelineWidth / 2, (int) (2 * timelineHeadRadius + marginTop) + 5, viewWidth + timelineWidth / 2, (int) (2 * timelineHeadRadius + timelineRadiusDistance + marginTop + 5)), mPaint);
    continue;
   }
   /**
    * 画时间轴的节点,即画圆形
    * 圆心的x都是一样的,view的中间
    * 圆心的y的计算是根据节点的位置来计算的,例如:第一个节点的y是根据第一个节点距离上面的距离加上第一个节点的半径:timelineHeadRadius + marginTop
    * 其余的节点就是在一个节点的y的基础上,加上两倍半径和节点之间的轴的长度＊节点数:(2 * timelineRadius + timelineRadiusDistance) * (j - 1) + timelineHeadRadius - timelineRadius + marginTop
    *
    */
   canvas.drawCircle(viewWidth, (2 * timelineRadius + timelineRadiusDistance) * (j - 1) + 2 * timelineHeadRadius - timelineRadius + marginTop, timelineRadius, mPaint);
   /**
    * 　
    * 画其余的轴
    * left:每个轴距离左边距离都是一样的　　　时间轴的中心位置-1/2的时间轴的宽度 viewWidth - timelineWidth / 2
    * top: (int) (j * (2 * timelineRadius + timelineRadiusDistance) - timelineRadiusDistance + 2 * (timelineHeadRadius-timelineRadius)+ marginTop)　
    * right:每个轴距离右边距离都是一样的　　　时间轴的中心位置+1/2的时间轴的宽度 viewWidth + timelineWidth / 2
    * bottom: (int) (j * (2 * timelineRadius + timelineRadiusDistance) + 2 * (timelineHeadRadius-timelineRadius)+ marginTop)
    */

   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);
  }
 }

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;

/**
 * TODO: document your custom view class.
 */
public class TimeLineView extends View {


 private Paint mPaint;
 /**
  * 第一个节点的外半径
  */
 private float timelineHeadRadius;
 /**
  * 第一个节点的颜色值
  */
 private int timelineHeadColor;
 /**
  * 第二个节点的颜色值
  */
 private int timelineOtherColor;
 /**
  * 时间线的节点数
  */
 private int timelineCount;
 /**
  * 时间轴的位置
  */
 private int viewWidth;
 /**
  * 时间轴到距离顶部的距离
  */
 private int marginTop;
 /**
  * 时间轴的节点的半径
  */
 private int timelineRadius;
 /**
  * 时间轴节点之间的距离
  */
 private int timelineRadiusDistance;
 /**
  * 时间轴的宽度
  */
 private int timelineWidth;
 /**
  * 时间轴的高度
  */
 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);
 }

 /**
  * 初始化
  *
  * @param context
  * @param attrs
  * @param 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);
  /**
   * 根据时间轴的节点数目，画对应的节点和轴
   */
  for (int j = 1; j <= timelineCount; j++) {

   /**
    * 当j==1，画第一个节点的时候，有点特殊，我们需要在节点的外面再换一个圆环
    */
   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);
    /**
     * 画第一个节点下面的轴
     */
    canvas.drawRect(new Rect(viewWidth - timelineWidth / 2, (int) (2 * timelineHeadRadius + marginTop) + 5, viewWidth + timelineWidth / 2, (int) (2 * timelineHeadRadius + timelineRadiusDistance + marginTop + 5)), mPaint);
    continue;
   }
   /**
    * 画时间轴的节点,即画圆形
    * 圆心的x都是一样的,view的中间
    * 圆心的y的计算是根据节点的位置来计算的,例如:第一个节点的y是根据第一个节点距离上面的距离加上第一个节点的半径:timelineHeadRadius + marginTop
    * 其余的节点就是在一个节点的y的基础上,加上两倍半径和节点之间的轴的长度＊节点数:(2 * timelineRadius + timelineRadiusDistance) * (j - 1) + timelineHeadRadius - timelineRadius + marginTop
    *
    */
   canvas.drawCircle(viewWidth, (2 * timelineRadius + timelineRadiusDistance) * (j - 1) + 2 * timelineHeadRadius - timelineRadius + marginTop, timelineRadius, mPaint);
   /**
    * 　
    * 画其余的轴
    * left:每个轴距离左边距离都是一样的　　　时间轴的中心位置-1/2的时间轴的宽度 viewWidth - timelineWidth / 2
    * top: (int) (j * (2 * timelineRadius + timelineRadiusDistance) - timelineRadiusDistance + 2 * (timelineHeadRadius-timelineRadius)+ marginTop)　
    * right:每个轴距离右边距离都是一样的　　　时间轴的中心位置+1/2的时间轴的宽度 viewWidth + timelineWidth / 2
    * bottom: (int) (j * (2 * timelineRadius + timelineRadiusDistance) + 2 * (timelineHeadRadius-timelineRadius)+ marginTop)
    */

   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();
 }

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

}