Android如何自定义View实现横向的双水波纹进度条

private RectF rectBorder;
if (rectBorder == null) {
    rectBorder = new RectF(0.5f * dp1, 0.5f * dp1, waveActualSizeWidth - 0.5f * dp1, waveActualSizeHeight - 0.5f * dp1);
}
canvas.drawRoundRect(rectBorder, dp27, dp27, borderPaint);

//这里用到了缓存 根据参数创建新位图
if (circleBitmap == null) {
    circleBitmap = Bitmap.createBitmap(waveActualSizeWidth, waveActualSizeHeight, Bitmap.Config.ARGB_8888);
}
//以该bitmap为底创建一块画布
if (bitmapCanvas == null) {
    bitmapCanvas = new Canvas(circleBitmap);
}
// 圆角矩形背景，为了能让波浪填充完整个圆形背景
if (rectBg == null) {
    rectBg = new RectF(0, 0, waveActualSizeWidth, waveActualSizeHeight);
}
bitmapCanvas.drawRoundRect(rectBg, dp27, dp27, backgroundPaint);
//裁剪图片
canvas.drawBitmap(circleBitmap, 0, 0, null);

/**
 * 绘制波浪线
 */
private Path canvasWavePath() {
    //要先清掉路线
    wavePath.reset();
    //起始点移至(0,0) p0 -p1 的高度随着进度的变化而变化
    wavePath.moveTo((currentPercent) * waveActualSizeWidth, -moveDistance);
    //最多能绘制多少个波浪
    //其实也可以用 i < getWidth() ;i+=waveLength来判断 这个没那么完美
    //绘制p0 - p1 绘制波浪线 这里有一段是超出View的，在View右边距的右边 所以是* 2
    for (int i = 0; i < waveNumber * 2; i++) {
        wavePath.rQuadTo(waveHeight, waveLength / 2, 0, waveLength);
        wavePath.rQuadTo(-waveHeight, waveLength / 2, 0, waveLength);
    }
    //连接p1 - p2
    wavePath.lineTo(0, waveActualSizeHeight);
    //连接p2 - p0
    wavePath.lineTo(0, 0);
    //封闭起来填充
    wavePath.close();
    return wavePath;
}

/**
 * 绘制第二层波浪
 */
private Path canvasSecondPath() {
    secondWavePath.reset();
    //初始点移动到下方
    secondWavePath.moveTo((currentPercent) * waveActualSizeWidth, waveActualSizeHeight + moveDistance);
    for (int i = 0; i < waveNumber * 2; i++) {
        secondWavePath.rQuadTo(waveHeight, -waveLength / 2, 0, -waveLength);
        secondWavePath.rQuadTo(-waveHeight, -waveLength / 2, 0, -waveLength);
    }
    secondWavePath.lineTo(0, 0);
    secondWavePath.lineTo(0, waveActualSizeHeight);
    secondWavePath.close();
    return secondWavePath;
}

/**
 * 设置进度
 *
 * @param currentProgress 进度
 * @param duration        达到进度需要的时间
 */
public void setProgress(int currentProgress, long duration, AnimatorListenerAdapter listenerAdapter) {
    float percent = currentProgress * 1f / maxProgress;
    this.currentProgress = currentProgress;
    //从0开始变化
    currentPercent = 0;
    moveDistance = 0;
    mProgressAnimator = ValueAnimator.ofFloat(0, percent);
    //设置动画时间
    mProgressAnimator.setDuration(duration);
    //让动画匀速播放，避免出现波浪平移停顿的现象
    mProgressAnimator.setInterpolator(new LinearInterpolator());
    mProgressAnimator.addUpdateListener(listener);
    mProgressAnimator.addListener(listenerAdapter);
    mProgressAnimator.start();

    // 波浪线
    startWaveAnimal();
}

/**
 * 波浪动画
 */
private void startWaveAnimal() {
    //动画实例化
    if (waveProgressAnimator == null) {
        waveProgressAnimator = new WaveProgressAnimal();
        //设置动画时间
        waveProgressAnimator.setDuration(2000);
        //设置循环播放
        waveProgressAnimator.setRepeatCount(Animation.INFINITE);
        //让动画匀速播放，避免出现波浪平移停顿的现象
        waveProgressAnimator.setInterpolator(new LinearInterpolator());
        //当前视图开启动画
        this.startAnimation(waveProgressAnimator);
    }
}