public class CustomProgrssView
extends View {
private Paint
paint;
private boolean running=
true;
private int progress=
0;
public CustomProgrssView(Context context) {
super(context);
}
public CustomProgrssView(Context context, AttributeSet attrs,
int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public CustomProgrssView(Context context, AttributeSet attrs) {
super(context, attrs);
//创建一个画笔
paint=
new Paint();
//抗锯齿
paint.setAntiAlias(
true);
//设置画笔的颜色
paint.setColor(Color.
RED);
//设置画笔，填充是空心的
paint.setStyle(Paint.Style.
STROKE);
new Thread(
new Runnable() {
@Override
public void run() {
while(
running){
if(
progress>=
360){
running=
false;
return;
}
System.
out.println(
"progress="+
progress);
progress+=
10;
//子线程刷新，系统调用onDraw()方法
postInvalidate();
try {
Thread.
sleep(
100);
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
float sweep;
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int x=getWidth()/
2;
int y=getHeight()/
2;
int radius=
200;
//设置画笔的粗细
paint.setStrokeWidth(
30);
//定义一个区域
RectF rectF=
new RectF(x-radius,y-radius,x+radius,y+radius);
//画弧
canvas.drawArc(rectF,-
90,
progress,
false,
paint);
int text= (
int) ((
float)
progress/
360*
100);
//measureText 测量字符串的宽度
float textWidth=
paint.measureText(
text+
"%");
Rect rectText=
new Rect();
//rectText.length()求子符串的高度
paint.getTextBounds(
text+
"%",
0,(
text+
"%").length(),rectText );
paint.setTextSize(
30);
paint.setStrokeWidth(
1);
canvas.drawText(
text+
"%",x-textWidth/
2,y+rectText.height()/
2,
paint);
}
}
