布局
<com.myapplication.Run
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:circle_color="#0000ff"
app:circle_radius="70dp"
app:circle_x="200dp"
app:circle_y="200dp" />
代码
public class Run extends View{
private float cx;
private float cy;
private float radius;
private Paint paint;
private int sweepAngle;
private int color;
public Run(Context context) {
this(context, null);
}
public Run(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
//获取自定义的属性
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MyPb);
//获取颜色
color = a.getColor(R.styleable.MyPb_circle_color, Color.BLACK);
radius = a.getDimension(R.styleable.MyPb_circle_radius, 20);
cx = a.getDimension(R.styleable.MyPb_circle_x, 100);
cy = a.getDimension(R.styleable.MyPb_circle_y, 100);
//需要回收
a.recycle();
paint = new Paint();
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
Timer timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
if (sweepAngle > 360) {
return;
}
sweepAngle += 1;
//刷新View
//这个方法只能在主线程刷新UI
// invalidate();
//这个方法,也是刷新UI,并且可以在子线程刷新
postInvalidate();
}
}
, 1000, 20);
}
@Override
protected void onDraw(Canvas canvas) {
paint.setColor(color);
paint.setStrokeWidth(5);
canvas.drawCircle(cx, cy, radius, paint);
paint.setColor(Color.RED);
RectF rectF = new RectF(cx - radius, cy - radius, cx + radius, cy + radius);
canvas.drawArc(rectF, -90, sweepAngle, false, paint);
//绘制文字
int progress = (int) (sweepAngle / 360f * 100);
paint.setStrokeWidth(0);
paint.setColor(Color.BLACK);
paint.setTextSize(35);
canvas.drawText(progress + "%", cx - 5, cy, paint);
}
}