android - 在android中慢慢填充颜色的圆圈

Question

我想先显示透明色圈，它应该慢慢地填充那个圈中的一种颜色。我尝试使用圆形进度条，但没有得到正确的结果。任何人都可以帮助我达到像这张图片这样的输出。

Answer 1

试试这段代码来创建一个带有填充颜色的圆圈。将整数值传递给它以绘制填充区域的百分比。 :)

private void circularImageBar(ImageView iv2, int i) {

    Bitmap b = Bitmap.createBitmap(300, 300,Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(b); 
    Paint paint = new Paint();

        paint.setColor(Color.parseColor("#c4c4c4"));
        paint.setStrokeWidth(10);
        paint.setStyle(Paint.Style.STROKE);
        canvas.drawCircle(150, 150, 140, paint);
        paint.setColor(Color.parseColor("#FFDB4C"));
        paint.setStrokeWidth(10);   
        paint.setStyle(Paint.Style.FILL);
        final RectF oval = new RectF();
        paint.setStyle(Paint.Style.STROKE);
        oval.set(10,10,290,290);
        canvas.drawArc(oval, 270, ((i*360)/100), false, paint);
        paint.setStrokeWidth(0);    
        paint.setTextAlign(Align.CENTER);
        paint.setColor(Color.parseColor("#8E8E93")); 
        paint.setTextSize(140);
        canvas.drawText(""+i, 150, 150+(paint.getTextSize()/3), paint); 
        iv2.setImageBitmap(b);
}