Android项目中使用Progress实现一个环形进度条

这期内容当中小编将会给大家带来有关Android项目中使用Progress实现一个环形进度条，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。

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);

上述就是小编为大家分享的Android项目中使用Progress实现一个环形进度条了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注行业资讯频道。

Android项目中使用Progress实现一个环形进度条

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