Android实现环形进度Progress Android实现计步进度的环形Progress

时间:2021-03-24 周木水人气:0

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项目中需要实现一个计步进度的环形Progress，当未达到设定目标时，绘制特定弧度（(已实现步数/目标步数)*360°）的圆弧。当已实现步数大于等于目标步数时绘制整个360°圆环。

效果图：

代码实现：

设置已完成步数和目标步数：

  public void setStep(int stepDone, int stepGoal) {
    this.stepDone = stepDone;
    this.stepGoal = stepGoal;
    int progess = (stepDone * 100) / stepGoal;
    if (progess > 100) {
      setProgress(100);
    } else {
      setProgress(progess);
    }
  }

设置进度：

  public void setProgress(int progress) {
    this.mProgress = progress;
    this.invalidate();
  }

设置画笔属性：

mPaint.setAntiAlias(true);
mPaint.setColor(Color.rgb(0xe9, 0xe9, 0xe9));
canvas.drawColor(Color.TRANSPARENT);
mPaint.setStrokeWidth(LINE_WIDTH_BG);
mPaint.setStyle(Paint.Style.STROKE);

绘制环形和背景：

canvas.drawArc(mRectF, -90, 360, false, mPaint);
mPaint.setColor(Color.rgb(0xf8, 0x60, 0x30));
canvas.drawArc(mRectF, -90, ((float) mProgress / mMaxProgress) * 360, false, mPaint);

绘制步数和单位：

mPaint.setStrokeWidth(TEXT_WIDTH);
    String text = stepDone + context.getString(R.string.step_unit);
    int textHeight = height / 4;
    mPaint.setTextSize(textHeight);
    int textWidth = (int) mPaint.measureText(text, 0, text.length());
    mPaint.setStyle(Paint.Style.FILL);
    canvas.drawText(text, width / 2 - textWidth / 2, height / 2 + textHeight / 4, mPaint);

绘制目标步数：

 String textGoal = "/" + stepGoal;
    int textGoalHeight = height / 8;
    mPaint.setTextSize(textGoalHeight);
    int textGoalWidth = (int) mPaint.measureText(textGoal, 0, textGoal.length());
    mPaint.setStyle(Paint.Style.FILL);
    canvas.drawText(textGoal, width / 2 - textGoalWidth / 2, height / 2 + textHeight / 2
        + textGoalHeight, mPaint);

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