Android Imitation Taobao Logistics Information TimeLineView

The production method of Taobao logistics information TimeLine:

Reference timeline effect diagram:

Code implementation:

package com.zms.timelineview;
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;
 /**
 * The outer radius of the first node
 */
 private float timelineHeadRadius;
 /**
 * The center color of the first node
 */
 private int timelineHeadColor;
 /**
 * The edge color of the first node
 */
 private int timelineHeadColorEdge;
 /**
 * The color value of other nodes
 */
 private int timelineOtherColor;
 /**
 * The number of timeline nodes
 */
 private int timelineCount;
 /**
 * The position of the timeline
 */
 private int viewWidth;
 /**
 * The distance from the timeline to the top
 */
 private int marginTop;
 /**
 * The radius of the timeline nodes
 */
 private int timelineRadius;
 /**
 * The distance between timeline nodes
 */
 private int timelineRadiusDistance;
 /**
 * The width of the timeline
 */
 private int timelineWidth;
 /**
 * The height of the timeline
 */
 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);
 }
 /**
 * Initialization
 * 
 * @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, 6));
 timelineRadius = (int) a.getDimension(
  R.styleable.TimeLineView_timelineRadius,
  convertDIP2PX(context, 5));
 timelineHeadColor = a.getColor(
  R.styleable.TimeLineView_timelineHeadColor,
  Color.parseColor("#25ae5f")); // Center dark color
 timelineHeadColorEdge = a.getColor(
  R.styleable.TimeLineView_timelineHeadColorEdge,
  Color.parseColor("#b9e5cc")); // Edge light color
 timelineOtherColor = a.getColor(
  R.styleable.TimeLineView_timelineOtherColor,
  Color.parseColor("#cccccc"));
 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) {
 // Default setting of the time axis position is in the middle of the view
 viewWidth = getMeasuredWidth() / 2;
 // Set the color of the first node
 mPaint.setColor(timelineHeadColor);
 /**
  * Draw the corresponding nodes and axes according to the number of time axis nodes
  */
 for (int j = 1; j <= timelineCount; j++) {
  /**
  * when j==1It's a bit special when drawing the first node, we need to draw another ring outside the node
  */
  if (j == 1) {
  // Set the pen to hollow
  canvas.drawCircle(viewWidth, timelineHeadRadius + marginTop,
   timelineRadius, mPaint);
  mPaint.setStyle(Paint.Style.STROKE);
  mPaint.setStrokeWidth(5.0f);
  // Draw the outer ring of the first node
  mPaint.setColor(timelineHeadColorEdge);
  canvas.drawCircle(viewWidth, timelineHeadRadius + marginTop,
   timelineHeadRadius, mPaint);
  // Set the pen color, the color of other time nodes
  mPaint.setColor(timelineOtherColor);
  // Set the pen to solid
  mPaint.setStyle(Paint.Style.FILL);
  /**
   * Draw the axis below the first node
   */
  canvas.drawRect(new Rect(viewWidth - timelineWidth / 2,
   (int) (2 * timelineHeadRadius + marginTop) + 5,
   viewWidth + timelineWidth / 2, (int) (2
    * timelineHeadRadius + timelineRadiusDistance
    + marginTop + 5)), mPaint);
  continue;
  }
  /**
  * Draw the timeline nodes, that is, draw circles; the x of the center of the circle is the same, the middle of the view
  * The calculation of the y of the center of the circle is based on the position of the node, for example: the y of the first node is based on the distance from the first node to the top plus the radius of the first node
  * :timelineHeadRadius + marginTop
  * The remaining nodes are on the y basis of a node, plus twice the radius and the length of the axis between nodes * the number of nodes: (2 * timelineRadius +
  * timelineRadiusDistance) * (j - 1) + timelineHeadRadius -
  * timelineRadius + marginTop
  * 
  */
  canvas.drawCircle(viewWidth,
   (2 * timelineRadius + timelineRadiusDistance) * (j - 1) + 2
    * timelineHeadRadius - timelineRadius + marginTop,
   timelineRadius, mPaint);
  /**
  * 　 Draw the remaining axes, left: each axis is the same distance from the left; the center position of the timeline-1/2the width of the timeline viewWidth -
  * timelineWidth / 2 top: (int) (j * (2 * timelineRadius +
  * timelineRadiusDistance) - timelineRadiusDistance + 2 *
  * (timelineHeadRadius-timelineRadius)+ marginTop)　
  * right: each axis is the same distance from the right; the center position of the timeline+1/2the width of the timeline 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();
 }
 /**
 * Convert dip to px
 */
 public static int convertDIP2PX(Context context, int dip) {
 float scale = context.getResources().getDisplayMetrics().density;
 return (int) (dip * scale + 0.5f * (dip >= 0 &63; 1 : -1));
 }
}

That's all for this article. I hope it will be helpful to everyone's learning and that everyone will support the Yelling Tutorial more.

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