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小編給大家分享一下Android如何實現(xiàn)多段顏色進度條效果,相信大部分人都還不怎么了解,因此分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后大有收獲,下面讓我們一起去了解一下吧!
具體內(nèi)容如下
這個進度條其實相對簡單.
這里可以把需要繪制的簡單分為兩個部分
1.灰色背景部分
2.多段顏色的進度部分
考慮到實際繪制中,分段部分不太容易根據(jù)進度值進行動態(tài)繪制.
故把多段顏色部分作為背景進行繪制,實際的灰色部分根據(jù)進度值變化,達到多段顏色部分進度變化的效果.
實現(xiàn)步驟
1.自定義View 來繪制進度條
2.定義背景及進度條繪制所需的畫筆
private Paint backgroundPaint, progressPaint, linePaint;//背景和進度條畫筆
3.定義不同顏色區(qū)域的矩陣數(shù)組(這里將進度分為多個色塊)
4.定義顏色數(shù)組,以及所占比例的數(shù)組.后面根據(jù)比例和顏色進行繪制
private Rect progressRect = new Rect();//進度條; private Rect backgroundRects[];//背景矩形區(qū)域 private float weights[];//每個區(qū)域的權(quán)重 private int colors[];//顏色
5.定義進度值,監(jiān)聽等雜項.
private float progress = 10, maxProgress = 100;//進度和最大進度 private OnProgressChangeListener listener;
6.在draw方法中進行繪制
7.背景色塊的繪制
//繪制背景顏色塊 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;//計算下一個的開始位置 canvas.drawRect(rect, backgroundPaint);//繪制矩形 }
8.進度條及分割線的繪制
progressRect.set(0, 0, progressX, getHeight());//設(shè)置進度條區(qū)域 canvas.drawRect(progressRect, progressPaint);//繪制進度條 for (int i = 0, lineX = 0; i < colors.length; i++) { int width = (int) (getWidthForWeight(weights[i], totalWeight)); //繪制矩形塊之間的分割線 lineX = lineX + width; if (lineX < progressX) {//給已經(jīng)走過了的區(qū)域畫上豎線 canvas.drawLine(lineX, 0, lineX, getHeight(), linePaint); } }
最后看看實現(xiàn)的效果圖
完整代碼
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; /** * 多段顏色的進度條 * Created by WQ on 2017/7/11. */ public class MultistageProgress extends View { private Paint backgroundPaint, progressPaint, linePaint;//背景和進度條畫筆 private Rect progressRect = new Rect();//進度條; private Rect backgroundRects[];//背景矩形區(qū)域 private float weights[];//每個區(qū)域的權(quán)重 private int colors[];//顏色 private float totalWeight;//總的權(quán)重 public static final int DEF_COLORS[];//默認(rèn)背景顏色數(shù)組 public static final float DEF_WEIGHTS[];//每段對應(yīng)的權(quán)重 private float progress = 10, maxProgress = 100;//進度和最大進度 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); } /** * 設(shè)置進度條顏色 * * @param color */ public void setProgressColor(int color) { progressPaint.setColor(color); } /** * 設(shè)置每一段的顏色以及對應(yīng)的權(quán)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(); } //繪制背景顏色塊 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;//計算下一個的開始位置 canvas.drawRect(rect, backgroundPaint);//繪制矩形 } progressRect.set(0, 0, progressX, getHeight());//設(shè)置進度條區(qū)域 canvas.drawRect(progressRect, progressPaint);//繪制進度條 for (int i = 0, lineX = 0; i < colors.length; i++) { int width = (int) (getWidthForWeight(weights[i], totalWeight)); //繪制矩形塊之間的分割線 lineX = lineX + width; if (lineX < progressX) {//給已經(jīng)走過了的區(qū)域畫上豎線 canvas.drawLine(lineX, 0, lineX, getHeight(), linePaint); } } } /** * 根據(jù)權(quán)重獲取對應(yīng)的寬度 * * @param weight * @param totalWeight * @return */ public float getWidthForWeight(float weight, float totalWeight) { return getWidth() * (weight / totalWeight) + 0.5f; } /** * 根據(jù)根據(jù)權(quán)重在數(shù)組中的索引獲取對應(yīng)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; } /** * 根據(jù)根據(jù)權(quán)重在數(shù)組中的索引獲取對應(yīng)的寬度 * * @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(), "進度值 " + 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 { /** * 進度改變時觸發(fā) * @param progress 進度 * @param position 所在區(qū)間段 */ void onProgressChange(float progress, int position); } }
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