Android自定义view(圆形进度条)

public class MyRoundProgressBar extends View {
private Paint paint;
float x, y;
CircleStyle cs;
private int rout;
private float radius;

public MyRoundProgressBar(Context context) {
super(context);
init();
}

public MyRoundProgressBar(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init();
}

public MyRoundProgressBar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}

public void init() {
paint = new Paint();
paint.setAntiAlias(true);
rout = 0;
radius = 100;
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (cs == null) {
cs = new CircleStyle(radius, Color.BLACK, rout);
x = getWidth() / 2;
y = getHeight() / 2;
paint.setColor(Color.BLACK);
//消除锯齿
paint.setStyle(Paint.Style.STROKE);
//设置粗细
paint.setStrokeWidth(1);
canvas.drawCircle(x, y, cs.getRadiu() - 10, paint);
canvas.drawCircle(x, y, cs.getRadiu() + 10, paint);

paint.setColor(cs.getColor());
//设置粗细
paint.setStrokeWidth(18);
RectF rect = new RectF();
//进行画圆弧
rect.set(x - cs.getRadiu(), y - cs.getRadiu(), x + cs.getRadiu(), y + cs.getRadiu());
canvas.drawArc(rect, 0.0f, cs.getRound(), false, paint);
startAnimation();
} else {
paint.setColor(Color.BLACK); //设置圆环的颜色
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(1);
canvas.drawCircle(x, y, cs.getRadiu() - 10, paint);
canvas.drawCircle(x, y, cs.getRadiu() + 10, paint);

paint.setColor(cs.getColor());
paint.setStrokeWidth(18);
RectF rect = new RectF();
rect.set(x - cs.getRadiu(), y - cs.getRadiu(), x + cs.getRadiu(), y + cs.getRadiu());
canvas.drawArc(rect, 0.0f, cs.getRound(), false, paint);
}
}

private void startAnimation() {
ValueAnimator animator = ValueAnimator.ofObject(new CircleEvaluator(), new CircleStyle(radius, Color.BLACK, 0), new CircleStyle(radius, Color.BLACK, 360));
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
cs = (CircleStyle) animation.getAnimatedValue();
invalidate();
}
});
animator.setDuration(10000);
animator.start();
}

class CircleEvaluator implements TypeEvaluator {
@Override
public Object evaluate(float fraction, Object startValue, Object endValue) {
CircleStyle start = (CircleStyle) startValue;
CircleStyle end = (CircleStyle) endValue;
float round = start.getRound() + fraction * (end.getRound() - start.getRound());

int colorR = Math.abs((int) (216 - fraction * (245 - 16)));
int colorG = Math.abs((int) (156 - fraction * (45 - 16)));
int colorB = Math.abs((int) (24 - fraction * (234 - 16)));

//三原色的设置
String tempR = Integer.toHexString(colorR);
String tempG = Integer.toHexString(colorG);
String tempB = Integer.toHexString(colorB);

if (tempR.length() < 2) {
tempR += "0";
}
if (tempG.length() < 2) {
tempG += "0";
}
if (tempB.length() < 2) {
tempB += "0";
}

String tempColor = "#" + tempR + tempG + tempB;//#fff3a3
System.out.println("---" + tempColor);
int color = Color.parseColor(tempColor);
CircleStyle cs = new CircleStyle(radius, color, round);
return cs;
}
}

class CircleStyle {
float radiu;
int color;
float round;

public CircleStyle(float radiu, int color, float round) {
this.radiu = radiu;
this.color = color;
this.round = round;
}

public float getRadiu() {
return radiu;
}

public void setRadiu(float radiu) {
this.radiu = radiu;
}

public int getColor() {
return color;
}

public void setColor(int color) {
this.color = color;
}

public float getRound() {
return round;
}

public void setRound(float round) {
this.round = round;
}
}
}