给progress 进度条添加动画效果

/** * 设置百分比 * * @param progress */public void setProgress(int progress, boolean animal) {    if (progress < 0 || progress > 100) {        throw new IllegalArgumentException("progress 不可以小于0 或大于100");    }    this.progress = progress;  // 进度    this.animal = animal;   // true 为开启动画 fase 为取消动画效果    postInvalidate();    if (progressChangedListener != null) {        progressChangedListener.onProgressChanged(this, progress);    }}

@Overridepublic void draw(Canvas canvas) {    Log.d(TAG, "[draw] .. in .. ");    super.draw(canvas);    if (animal) {   // 在onDraw 里面开始执行        startAnimation(progress);        animal = false;    } else {        linePaint = new Paint();        linePaint.setAntiAlias(true);        linePaint.setStyle(Paint.Style.FILL);        linePaint.setStrokeWidth(lineHeight);        linePaint.setColor(getResources().getColor(lineClor));        //因为是以画布Canvas 为draw对象，所以RectF构造函数内的参数是以canvas为边界，而不是屏幕        canvas.drawLine(0, getHeight() / 2, getWidth(), getHeight() / 2, linePaint);        pointPaint = new Paint();        pointPaint.setAntiAlias(true);        pointPaint.setStyle(Paint.Style.FILL);        pointPaint.setColor(getResources().getColor(pointColor1));        canvas.drawCircle(getCx(), getHeight() / 2, pointRadius, pointPaint);        linePaintOut = new Paint();        linePaintOut.setAntiAlias(true);        linePaintOut.setStyle(Paint.Style.FILL);        linePaintOut.setStrokeWidth(lineHeight);        linePaintOut.setColor(getResources().getColor(pointColor));        canvas.drawLine(0, getHeight() / 2, getCx(), getHeight() / 2, linePaintOut);    }}

/** * 开始动画 * * @param progress * @author hubing */private void startAnimation(int progress) {    // 初始化动画    if (progressAnimator == null) {        progressAnimator = new ValueAnimator();        progressAnimator.setDuration(800);        progressAnimator.addUpdateListener(this);    }    // 重置动画值    progressAnimator.setIntValues(0, progress);    progressAnimator.start();}