大橙子网站建设,新征程启航
为企业提供网站建设、域名注册、服务器等服务
小编给大家分享一下Android如何实现多段颜色进度条效果,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!
10年积累的网站制作、网站设计经验,可以快速应对客户对网站的新想法和需求。提供各种问题对应的解决方案。让选择我们的客户得到更好、更有力的网络服务。我虽然不认识你,你也不认识我。但先网站制作后付款的网站建设流程,更有红河哈尼免费网站建设让你可以放心的选择与我们合作。
具体内容如下
这个进度条其实相对简单.
这里可以把需要绘制的简单分为两个部分
1.灰色背景部分
2.多段颜色的进度部分
考虑到实际绘制中,分段部分不太容易根据进度值进行动态绘制.
故把多段颜色部分作为背景进行绘制,实际的灰色部分根据进度值变化,达到多段颜色部分进度变化的效果.
实现步骤
1.自定义View 来绘制进度条
2.定义背景及进度条绘制所需的画笔
private Paint backgroundPaint, progressPaint, linePaint;//背景和进度条画笔
3.定义不同颜色区域的矩阵数组(这里将进度分为多个色块)
4.定义颜色数组,以及所占比例的数组.后面根据比例和颜色进行绘制
private Rect progressRect = new Rect();//进度条; private Rect backgroundRects[];//背景矩形区域 private float weights[];//每个区域的权重 private int colors[];//颜色
5.定义进度值,监听等杂项.
private float progress = 10, maxProgress = 100;//进度和最大进度 private OnProgressChangeListener listener;
6.在draw方法中进行绘制
7.背景色块的绘制
//绘制背景颜色块 int x = 0, y = getHeight(); int progressX = (int) getWidthForWeight(progress, maxProgress); for (int i = 0; i < colors.length; i++) { Rect rect = backgroundRects[i]; backgroundPaint.setColor(colors[i]); int width = (int) (getWidthForWeight(weights[i], totalWeight)); rect.set(x, 0, x + width, y); x += width;//计算下一个的开始位置 canvas.drawRect(rect, backgroundPaint);//绘制矩形 }
8.进度条及分割线的绘制
progressRect.set(0, 0, progressX, getHeight());//设置进度条区域 canvas.drawRect(progressRect, progressPaint);//绘制进度条 for (int i = 0, lineX = 0; i < colors.length; i++) { int width = (int) (getWidthForWeight(weights[i], totalWeight)); //绘制矩形块之间的分割线 lineX = lineX + width; if (lineX < progressX) {//给已经走过了的区域画上竖线 canvas.drawLine(lineX, 0, lineX, getHeight(), linePaint); } }
最后看看实现的效果图
完整代码
package com.wq.widget; import android.animation.ObjectAnimator; import android.animation.ValueAnimator; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.util.AttributeSet; import android.util.Log; import android.view.View; import android.view.animation.LinearInterpolator; /** * 多段颜色的进度条 * Created by WQ on 2017/7/11. */ public class MultistageProgress extends View { private Paint backgroundPaint, progressPaint, linePaint;//背景和进度条画笔 private Rect progressRect = new Rect();//进度条; private Rect backgroundRects[];//背景矩形区域 private float weights[];//每个区域的权重 private int colors[];//颜色 private float totalWeight;//总的权重 public static final int DEF_COLORS[];//默认背景颜色数组 public static final float DEF_WEIGHTS[];//每段对应的权重 private float progress = 10, maxProgress = 100;//进度和最大进度 private OnProgressChangeListener listener; static { DEF_COLORS = new int[]{ Color.parseColor("#00B6D0"), Color.parseColor("#0198AE"), Color.parseColor("#008396"), Color.parseColor("#007196"), Color.parseColor("#005672") }; DEF_WEIGHTS = new float[]{ 138, 35, 230, 230, 57 }; } public float getProgress() { return progress; } public void setProgress(float progress) { this.progress = progress; invalidate(); onProgressChange(); } private void onProgressChange() { if (listener != null) { int position = 0; int currentWidth = (int) getWidthForWeight(getProgress(), getMaxProgress()); int tmpWidth = 0; for (int i = 0; i < weights.length; i++) { tmpWidth += (int) getWidthForWeight(weights[i], totalWeight); if (tmpWidth >= currentWidth) { position = i; break; } } listener.onProgressChange(getProgress(), position); } } public float getMaxProgress() { return maxProgress; } public void setMaxProgress(float maxProgress) { this.maxProgress = maxProgress; invalidate(); } public OnProgressChangeListener getProgressChangeListener() { return listener; } public void setProgressChangeListener(OnProgressChangeListener listener) { this.listener = listener; } public MultistageProgress(Context context) { super(context); init(); } public MultistageProgress(Context context, AttributeSet attrs) { super(context, attrs); init(); } public MultistageProgress(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(); } public MultistageProgress(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); init(); } public void init() { backgroundPaint = new Paint(); backgroundPaint.setStyle(Paint.Style.FILL_AND_STROKE); backgroundPaint.setColor(Color.RED); progressPaint = new Paint(); progressPaint.setStyle(Paint.Style.FILL_AND_STROKE); progressPaint.setColor(Color.parseColor("#d9d9d9")); linePaint = new Paint(); linePaint.setStyle(Paint.Style.FILL_AND_STROKE); linePaint.setColor(Color.parseColor("#e7eaf0")); linePaint.setStrokeWidth(2); setColors(DEF_COLORS, DEF_WEIGHTS); } /** * 设置进度条颜色 * * @param color */ public void setProgressColor(int color) { progressPaint.setColor(color); } /** * 设置每一段的颜色以及对应的权重 * * @param colors * @param weights */ public void setColors(int[] colors, float weights[]) { if (colors == null || weights == null) { throw new NullPointerException("colors And weights must be not null"); } if (colors.length != weights.length) { throw new IllegalArgumentException("colors And weights length must be same"); } backgroundRects = new Rect[colors.length]; this.colors = colors; this.weights = weights; totalWeight = 0; for (int i = 0; i < weights.length; i++) { totalWeight += weights[i]; backgroundRects[i] = new Rect(); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if (backgroundRects == null) { return; } if (maxProgress <= 0) { maxProgress = getWidth(); } //绘制背景颜色块 int x = 0, y = getHeight(); int progressX = (int) getWidthForWeight(progress, maxProgress); for (int i = 0; i < colors.length; i++) { Rect rect = backgroundRects[i]; backgroundPaint.setColor(colors[i]); int width = (int) (getWidthForWeight(weights[i], totalWeight)); rect.set(x, 0, x + width, y); x += width;//计算下一个的开始位置 canvas.drawRect(rect, backgroundPaint);//绘制矩形 } progressRect.set(0, 0, progressX, getHeight());//设置进度条区域 canvas.drawRect(progressRect, progressPaint);//绘制进度条 for (int i = 0, lineX = 0; i < colors.length; i++) { int width = (int) (getWidthForWeight(weights[i], totalWeight)); //绘制矩形块之间的分割线 lineX = lineX + width; if (lineX < progressX) {//给已经走过了的区域画上竖线 canvas.drawLine(lineX, 0, lineX, getHeight(), linePaint); } } } /** * 根据权重获取对应的宽度 * * @param weight * @param totalWeight * @return */ public float getWidthForWeight(float weight, float totalWeight) { return getWidth() * (weight / totalWeight) + 0.5f; } /** * 根据根据权重在数组中的索引获取对应的位置 * * @param position * @return */ public float getXForWeightPosition(int position) { float xPosition = 0; for (int i = 0; i < position; i++) { xPosition += getWidthForWeightPosition(i); } return xPosition; } /** * 根据根据权重在数组中的索引获取对应的宽度 * * @param position * @return */ public float getWidthForWeightPosition(int position) { return getWidth() * (weights[position] / totalWeight) + 0.5f; } ObjectAnimator valueAnimator; public void autoChange(float startProgress, float endProgress, long changeTime) { if (valueAnimator != null && valueAnimator.isRunning()) return; setProgress((int) startProgress); setMaxProgress((int) endProgress); valueAnimator = ObjectAnimator.ofFloat(this, "progress", startProgress, endProgress); valueAnimator.setDuration(changeTime); valueAnimator.setInterpolator(new LinearInterpolator()); valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { float value = (float) animation.getAnimatedValue(); // setProgress((int) value); Log.d(getClass().getName(), "进度值 " + value); } }); valueAnimator.start(); } public void stopChange() { if (valueAnimator != null && valueAnimator.isRunning()) valueAnimator.cancel(); } @Override protected void onDetachedFromWindow() { if (valueAnimator != null && valueAnimator.isRunning()) { valueAnimator.cancel(); } super.onDetachedFromWindow(); } public interface OnProgressChangeListener { /** * 进度改变时触发 * @param progress 进度 * @param position 所在区间段 */ void onProgressChange(float progress, int position); } }
以上是“Android如何实现多段颜色进度条效果”这篇文章的所有内容,感谢各位的阅读!相信大家都有了一定的了解,希望分享的内容对大家有所帮助,如果还想学习更多知识,欢迎关注创新互联行业资讯频道!