这这是我的第一个问题，在stackoverflow.com所以原谅自己，如果我做的东西是错误的。

This is my first question here at stackoverflow.com so excuse myself if i'm doing stuff wrong.

我想创建一个圈子基本上就像一个进度条。现在我想通过设置一些code中的比例。

I want to create a circle which basically is like a progress bar. Now I'd like to set the percentage through some code.

我想实现的是：的https://m.xsw88.com/allimgs/daicuo/20230904/279.png

我的问题：

感谢。

推荐答案

这只是一个提示。这仅仅是画两个圆弧在同一RECT一个观点：从角度0一弧跨越到360第二个（上面第一个），范围从0到要看百分比的角度

This is only a hint. It is simply a view that draw two arcs in the same rect: First arc spans from angle 0 to 360. The second one (above the first) spans from 0 to an angle that depends on the percentage.

public class PercentView extends View {

    public PercentView (Context context) {
        super(context);
        init();
    }
    public PercentView (Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }
    public PercentView (Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }
    private void init() {
        paint = new Paint();
        paint.setColor(getContext().getResources().getColor(R.color.lightblue));
        paint.setAntiAlias(true);
        paint.setStyle(Paint.Style.FILL);
        bgpaint = new Paint();
        bgpaint.setColor(getContext().getResources().getColor(R.color.darkblue));
        bgpaint.setAntiAlias(true);
        bgpaint.setStyle(Paint.Style.FILL);
        rect = new RectF();
    }
    Paint paint;
    Paint bgpaint;
    RectF rect;
    float percentage = 0;
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        //draw background circle anyway
        int left = 0;
        int width = getWidth();
        int top = 0;
        rect.set(left, top, left+width, top + width); 
        canvas.drawArc(rect, -90, 360, true, bgpaint);
        if(percentage!=0) {
            canvas.drawArc(rect, -90, (360*percentage), true, paint);
        }
    }
    public void setPercentage(float percentage) {
        this.percentage = percentage / 100;
        invalidate();
    }
}

添加到您的布局：

Add to your layout:

<bla.bla.PercentView
            android:id="@+id/percentview"
            android:layout_width="100dp"
            android:layout_height="100dp" />