Android实现多段颜色进度条效果

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 progress = 10, maxProgress = 100;//进度和最大进度private OnProgressChangeListener listener;

 //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);    }}

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);  }}