淘宝物流信息TimeLine的制作方法：
仿照的TimeLine效果图：
代码实现：
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; /** * 首个节点的外半径 */ private float timelineHeadRadius; /** * 首个节点的中心颜色 */ private int timelineHeadColor; /** * 首个节点的边缘颜色 */ private int timelineHeadColorEdge; /** * 其他节点的颜色值 */ 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, 6)); timelineRadius = (int) a.getDimension( R.styleable.TimeLineView_timelineRadius, convertDIP2PX(context, 5)); timelineHeadColor = a.getColor( R.styleable.TimeLineView_timelineHeadColor, Color.parseColor("#25ae5f")); // 中心深色 timelineHeadColorEdge = a.getColor( R.styleable.TimeLineView_timelineHeadColorEdge, Color.parseColor("#b9e5cc")); // 边缘浅色 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) { // 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 mPaint.setColor(timelineHeadColorEdge); 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)); }}
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