圈与Android的

Question

慢充颜色我想首先展示透明色圈，它应该在那个圈子里填充一种颜色慢。我尝试通过使用圆形进度栏，但我没有得到正确的结果。任何人都可以帮助我像这张照片一样达到这个输出。

Answer 1

试试这段代码来创建一个填充颜色的圆。传递它的整数值来绘制填充面积的百分比。 :)

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); 
}