Android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);    }}

/** * 横向双水波浪进度条 * * @author jingbin **/public class HorizontalWaveProgressView extends View {
    //绘制波浪画笔    private Paint wavePaint;    //绘制波浪Path    private Path wavePath;    //波浪的宽度    private final float waveLength;    //波浪的高度    private final float waveHeight;    //波浪组的数量 一个波浪是一低一高    private int waveNumber;    //自定义View的波浪宽高    private int waveDefaultWidth;    private int waveDefaultHeight;    //测量后的View实际宽高    private int waveActualSizeWidth;    private int waveActualSizeHeight;    //当前进度值占总进度值的占比    private float currentPercent;    //当前进度值    private int currentProgress;    //进度的最大值    private int maxProgress;    //动画对象    private WaveProgressAnimal waveProgressAnimator;    private ValueAnimator mProgressAnimator;    private ValueAnimator mEndAnimator;    //波浪平移距离    private float moveDistance = 0;    //圆形背景画笔    private Paint backgroundPaint;    // 边框    private Paint borderPaint;    //bitmap    private Bitmap circleBitmap;    //bitmap画布    private Canvas bitmapCanvas;    //波浪颜色    private final int wave_color;    //圆形背景进度框颜色    private final int backgroundColor;    //进度条显示值监听接口    private UpdateTextListener updateTextListener;    //是否绘制双波浪线    private boolean isShowSecondWave;    //第二层波浪的颜色    private final int secondWaveColor;    //边框色    private final int borderColor;    //第二层波浪的画笔    private Paint secondWavePaint;    private Path secondWavePath;    private int dp1;    // 圆角角度    private int dp27;

    public HorizontalWaveProgressView(Context context) {        this(context, null);    }
    public HorizontalWaveProgressView(Context context, @Nullable AttributeSet attrs) {        this(context, attrs, 0);    }
    public HorizontalWaveProgressView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        //获取attrs文件下配置属性        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.HorizontalWaveProgressView);        //获取波浪宽度 第二个参数，如果xml设置这个属性，则会取设置的默认值 也就是说xml没有指定wave_length这个属性，就会取Density.dip2px(context,25)        waveLength = typedArray.getDimension(R.styleable.HorizontalWaveProgressView_wave_length, DensityUtil.dip2px(context, 25));        //获取波浪高度        waveHeight = typedArray.getDimension(R.styleable.HorizontalWaveProgressView_wave_height, DensityUtil.dip2px(context, 5));        //获取波浪颜色        wave_color = typedArray.getColor(R.styleable.HorizontalWaveProgressView_wave_color, Color.parseColor("#B76EFF"));        //圆形背景颜色        backgroundColor = typedArray.getColor(R.styleable.HorizontalWaveProgressView_wave_background_color, Color.WHITE);        //当前进度        currentProgress = typedArray.getInteger(R.styleable.HorizontalWaveProgressView_currentProgress, 0);        //最大进度        maxProgress = typedArray.getInteger(R.styleable.HorizontalWaveProgressView_maxProgress, 100);        //是否显示第二层波浪        isShowSecondWave = typedArray.getBoolean(R.styleable.HorizontalWaveProgressView_second_show, false);        //第二层波浪的颜色        secondWaveColor = typedArray.getColor(R.styleable.HorizontalWaveProgressView_second_color, Color.parseColor("#DEBCFF"));        //边框色        borderColor = typedArray.getColor(R.styleable.HorizontalWaveProgressView_border_color, Color.parseColor("#DEBCFF"));        //记得把TypedArray回收        //程序在运行时维护了一个 TypedArray的池，程序调用时，会向该池中请求一个实例，用完之后，调用 recycle() 方法来释放该实例，从而使其可被其他模块复用。        //那为什么要使用这种模式呢？答案也很简单，TypedArray的使用场景之一，就是上述的自定义View，会随着 Activity的每一次Create而Create，        //因此，需要系统频繁的创建array，对内存和性能是一个不小的开销，如果不使用池模式，每次都让GC来回收，很可能就会造成OutOfMemory。        //这就是使用池+单例模式的原因，这也就是为什么官方文档一再的强调：使用完之后一定 recycle,recycle,recycle        typedArray.recycle();        init(context);    }

    /**     * 初始化一些画笔路径配置     */    private void init(Context context) {        //设置自定义View的宽高        waveDefaultWidth = DensityUtil.dip2px(context, 152);        waveDefaultHeight = DensityUtil.dip2px(context, 40);        dp1 = DensityUtil.dip2px(getContext(), 1);        dp27 = DensityUtil.dip2px(getContext(), 27);
        wavePath = new Path();        wavePaint = new Paint();        //设置画笔为取交集模式        wavePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));        //设置波浪颜色        wavePaint.setColor(wave_color);        //设置抗锯齿        wavePaint.setAntiAlias(true);
        //矩形背景        backgroundPaint = new Paint();        backgroundPaint.setColor(backgroundColor);        backgroundPaint.setAntiAlias(true);
        //边框        borderPaint = new Paint(Paint.ANTI_ALIAS_FLAG);        borderPaint.setColor(borderColor);        borderPaint.setAntiAlias(true);        borderPaint.setStrokeWidth(dp1);        borderPaint.setStyle(Paint.Style.STROKE);
        if (isShowSecondWave) {            //是否绘制双波浪线            secondWavePath = new Path();            //初始化第二层波浪画笔            secondWavePaint = new Paint();            secondWavePaint.setColor(secondWaveColor);            secondWavePaint.setAntiAlias(true);            //因为要覆盖在第一层波浪上，且要让半透明生效，所以选SRC_ATOP模式            secondWavePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP));        }
        //占比一开始设置为0        currentPercent = currentProgress * 1f / maxProgress;    }

    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        //这里用到了缓存 根据参数创建新位图        circleBitmap = Bitmap.createBitmap(waveActualSizeWidth, waveActualSizeHeight, Bitmap.Config.ARGB_8888);        //以该bitmap为底创建一块画布        bitmapCanvas = new Canvas(circleBitmap);        // 绘制背景，为了能让波浪填充完整个圆形背景        RectF rectBg = new RectF(0, 0, waveActualSizeWidth, waveActualSizeHeight);        bitmapCanvas.drawRoundRect(rectBg, dp27, dp27, backgroundPaint);

        if (isShowSecondWave) {            //绘制第二层波浪            bitmapCanvas.drawPath(canvasSecondPath(), secondWavePaint);        }//绘制波浪形        bitmapCanvas.drawPath(canvasWavePath(), wavePaint);        //裁剪图片        canvas.drawBitmap(circleBitmap, 0, 0, null);        // 绘制边框        RectF rectBorder = new RectF(0.5f * dp1, 0.5f * dp1, waveActualSizeWidth - 0.5f * dp1, waveActualSizeHeight - 0.5f * dp1);        canvas.drawRoundRect(rectBorder, dp27, dp27, borderPaint);    }
    /**     * 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);//        wavePath.moveTo(-moveDistance,(1-currentPercent) * waveActualSize);        //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(waveActualSizeWidth, waveActualSizeHeight);        //连接p2 - p3        wavePath.lineTo(0, waveActualSizeHeight);        //连接p3 - p0 p3-p0d的高度随着进度变化而变化        wavePath.lineTo(0, 0);        //封闭起来填充        wavePath.close();        return wavePath;    }
    /**     * 绘制第二层波浪方法     */    private Path canvasSecondPath() {        float secondWaveHeight = waveHeight;        secondWavePath.reset();        //移动到右上方，也就是p1点        secondWavePath.moveTo((currentPercent) * waveActualSizeWidth, waveActualSizeHeight + moveDistance);        //p1 - p0        for (int i = 0; i < waveNumber * 2; i++) {            secondWavePath.rQuadTo(secondWaveHeight, -waveLength / 2, 0, -waveLength);            secondWavePath.rQuadTo(-secondWaveHeight, -waveLength / 2, 0, -waveLength);        }        //p3-p0的高度随着进度变化而变化        secondWavePath.lineTo(0, 0);        //连接p3 - p2        secondWavePath.lineTo(0, waveActualSizeHeight);        secondWavePath.lineTo(waveActualSizeHeight, waveActualSizeWidth);        //连接p2 - p1        secondWavePath.lineTo(waveActualSizeWidth, waveActualSizeHeight + moveDistance);        //封闭起来填充        secondWavePath.close();        return secondWavePath;    }
    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        int width = measureSize(waveDefaultWidth, widthMeasureSpec);        int height = measureSize(waveDefaultHeight, heightMeasureSpec);        //把View改为正方形        setMeasuredDimension(width, height);        //waveActualSize是实际的宽高        waveActualSizeWidth = width;        waveActualSizeHeight = height;        //Math.ceil(a)返回求不小于a的最小整数        // 举个例子:        // Math.ceil(125.9)=126.0        // Math.ceil(0.4873)=1.0        // Math.ceil(-0.65)=-0.0        //这里是调整波浪数量 就是View中能容下几个波浪 用到ceil就是一定让View完全能被波浪占满 为循环绘制做准备 分母越小就约精准        waveNumber = (int) Math.ceil(Double.parseDouble(String.valueOf(waveActualSizeHeight / waveLength / 2)));    }
    /**     * 返回指定的值     *     * @param defaultSize 默认的值     * @param measureSpec 模式     */    private int measureSize(int defaultSize, int measureSpec) {        int result = defaultSize;        int specMode = MeasureSpec.getMode(measureSpec);        int specSize = MeasureSpec.getSize(measureSpec);
        //View.MeasureSpec.EXACTLY：如果是match_parent 或者设置定值就        //View.MeasureSpec.AT_MOST：wrap_content        if (specMode == MeasureSpec.EXACTLY) {            result = specSize;        } else if (specMode == MeasureSpec.AT_MOST) {            result = Math.min(result, specSize);        }        return result;    }
    //新建一个动画类    public class WaveProgressAnimal extends Animation {
        //在绘制动画的过程中会反复的调用applyTransformation函数，        // 每次调用参数interpolatedTime值都会变化，该参数从0渐 变为1，当该参数为1时表明动画结束        @Override        protected void applyTransformation(float interpolatedTime, Transformation t) {            super.applyTransformation(interpolatedTime, t);            //左边的距离            moveDistance = interpolatedTime * waveNumber * waveLength * 2;            //重新绘制            invalidate();        }    }
    /**     * 直接结束     *     * @param duration 结束时间     */    public void setProgressEnd(long duration, AnimatorListenerAdapter listenerAdapter) {        // 如果是100会不满，因为在波动        if (currentProgress == maxProgress) {            // 到底了就从头开始            currentPercent = 0;        }        mEndAnimator = ValueAnimator.ofFloat(currentPercent, 1.1f);        mEndAnimator.setInterpolator(new DecelerateInterpolator());        mEndAnimator.setDuration(duration);        mEndAnimator.addUpdateListener(listener);        mEndAnimator.addListener(listenerAdapter);        mEndAnimator.start();
        // 波浪线        startWaveAnimal();    }
    /**     * 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);        }    }
    /**     * 进度的监听     */    ValueAnimator.AnimatorUpdateListener listener = new ValueAnimator.AnimatorUpdateListener() {        @Override        public void onAnimationUpdate(ValueAnimator animation) {            // 当前进度百分比，[0,1]            currentPercent = (float) animation.getAnimatedValue();            //这里直接根据进度值显示            if (updateTextListener != null) {                updateTextListener.updateText(currentPercent, maxProgress);            }        }    };

    public interface UpdateTextListener {        /**         * 提供接口 给外部修改数值样式 等         *         * @param currentPercent 当前进度百分比         * @param maxProgress    进度条的最大数值         */        void updateText(float currentPercent, float maxProgress);    }
    /**     * 设置监听     */    public void setUpdateTextListener(UpdateTextListener updateTextListener) {        this.updateTextListener = updateTextListener;
    }
    /**     * 停止动画，销毁对象     */    public void stopAnimal() {        if (waveProgressAnimator != null) {            waveProgressAnimator.cancel();        }        if (mProgressAnimator != null && mProgressAnimator.isStarted()) {            mProgressAnimator.removeAllListeners();            mProgressAnimator.cancel();        }        if (mEndAnimator != null && mEndAnimator.isStarted()) {            mEndAnimator.removeAllListeners();            mEndAnimator.cancel();        }    }}