<declare-styleable name="WaveProgressView">
  <attr name="radius" format="dimension|reference" />
  <attr name="radius_color" format="color|reference" />
  <attr name="progress_text_color" format="color|reference" />
  <attr name="progress_text_size" format="dimension|reference" />
  <attr name="progress_color" format="color|reference" />
  <attr name="progress" format="float" />
  <attr name="maxProgress" format="float" />
 </declare-styleable>

TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.WaveProgressView, defStyleAttr, R.style.WaveProgressViewDefault);
  radius = (int) a.getDimension(R.styleable.WaveProgressView_radius, radius);
  textColor = a.getColor(R.styleable.WaveProgressView_progress_text_color, 0);
  textSize = a.getDimensionPixelSize(R.styleable.WaveProgressView_progress_text_size, 0);
  progressColor = a.getColor(R.styleable.WaveProgressView_progress_color, 0);
  radiusColor = a.getColor(R.styleable.WaveProgressView_radius_color, 0);
  progress = a.getFloat(R.styleable.WaveProgressView_progress, 0);
  maxProgress = a.getFloat(R.styleable.WaveProgressView_maxProgress, 100);
  a.recycle();

 @Override 
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  //计算宽和高
  int exceptW = getPaddingLeft() + getPaddingRight() + 2 * radius;
  int exceptH = getPaddingTop() + getPaddingBottom() + 2 * radius;
  int width = resolveSize(exceptW, widthMeasureSpec);
  int height = resolveSize(exceptH, heightMeasureSpec);
  int min = Math.min(width, height);

  this.width = this.height = min;

  //计算半径,减去padding的最小值
  int minLR = Math.min(getPaddingLeft(), getPaddingRight());
  int minTB = Math.min(getPaddingTop(), getPaddingBottom());
  minPadding = Math.min(minLR, minTB);
  radius = (min - minPadding * 2) / 2;

  setMeasuredDimension(min, min);
 }

 public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) {
  final int specMode = MeasureSpec.getMode(measureSpec);
  final int specSize = MeasureSpec.getSize(measureSpec);
  final int result;
  switch (specMode) {
   case MeasureSpec.AT_MOST:
    if (specSize < size) {
     result = specSize | MEASURED_STATE_TOO_SMALL;
    } else {
     result = size;
    }
    break;
   case MeasureSpec.EXACTLY:
    result = specSize;
    break;
   case MeasureSpec.UNSPECIFIED:
   default:
    result = size;
  }
  return result | (childMeasuredState & MEASURED_STATE_MASK);
 }

 pathPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  pathPaint.setColor(progressColor);
  pathPaint.setDither(true);
  pathPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));

if (bitmap == null) {
   bitmap = Bitmap.createBitmap(this.width, this.height, Bitmap.Config.ARGB_8888);
   bitmapCanvas = new Canvas(bitmap);
  }

 bitmapCanvas.save();
  //移动坐标系
  bitmapCanvas.translate(minPadding, minPadding);
 // .... some thing
 bitmapCanvas.restore();

  bitmapCanvas.drawCircle(radius, radius, radius, circlePaint);

public void rQuadTo(float dx1, float dy1, float dx2, float dy2)

float percent=progress * 1.0f / maxProgress;

//根据直径计算绘制贝赛尔曲线的次数
   int count = radius * 4 / 60;
   //控制-控制点y的坐标
   float point = (1 - percent) * 15;
   for (int i = 0; i < count; i++) {
    path.rQuadTo(15, -point, 30, 0);
    path.rQuadTo(15, point, 30, 0);
   }

 //绘制PATH
  //重置绘制路线
  path.reset();
  float percent=progress * 1.0f / maxProgress;
  float y = (1 - percent) * radius * 2;
  //移动到右上边
  path.moveTo(radius * 2, y);
  //移动到最右下方
  path.lineTo(radius * 2, radius * 2);
  //移动到最左下边
  path.lineTo(0, radius * 2);
  //移动到左上边
  // path.lineTo(0, y);
  //实现左右波动,根据progress来平移
  path.lineTo(-(1 -percent) * radius*2, y);
  if (progress != 0.0f) {
   //根据直径计算绘制贝赛尔曲线的次数
   int count = radius * 4 / 60;
   //控制-控制点y的坐标
   float point = (1 - percent) * 15;
   for (int i = 0; i < count; i++) {
    path.rQuadTo(15, -point, 30, 0);
    path.rQuadTo(15, point, 30, 0);
   }
  }
  //闭合
  path.close();
  bitmapCanvas.drawPath(path, pathPaint);

 //绘制文字
  String text = progress + "%";
  float textW = textPaint.measureText(text);
  Paint.FontMetrics fontMetrics = textPaint.getFontMetrics();
  float baseLine = radius - (fontMetrics.ascent + fontMetrics.descent) / 2;
  bitmapCanvas.drawText(text, radius - textW / 2, baseLine, textPaint);

canvas.drawBitmap(bitmap, 0, 0, null);

 ObjectAnimator objectAnimator0 = ObjectAnimator.ofFloat(waveProgressView_0, "progress", 0f, 100f);
  objectAnimator0.setDuration(3300);
  objectAnimator0.setInterpolator(new LinearInterpolator());
  objectAnimator0.start();