最近看到华为手机自带的时钟挺漂亮的，就想着自己做一个，先上效果图（不知道怎么传小图）
华为手机自带钟表.gif
自定义view实现.gif
自定义属性(其实可以有更多自定义属性)：
自定义view：
public class HuaWeiClock extends View {
/**
* 背景颜色
*/
private int backgroundColor;
/**
* 秒针竖线的颜色
*/
private int secondLineColor;
/**
* 秒针红色点的颜色
*/
private int secondPointColor;
/**
* 时间的颜色
*/
private int timeColor;
private Paint mPaint;
/**
* 背景宽度
*/
private int widthBg;
/**
* 背景高度
*/
private int heightBg;
/**
* 钟表半径
*/
private int watchRadius;
/**
* 秒针红点的半径
*/
private static final int SECOND_POINT_RADIUS = 20;
/**
* 线最长的长度
*/
private static final int LINE_MAX_LENGTH = 60;
/**
* 线最短的长度
*/
private static final int LINE_MIN_LENGTH = 30;
/**
* 秒刻度白线的数量
*/
private static final int LINE_COUNT = 120;
/**
* 每根针占的角度
*/
private static final int ONE_LINE_ANGLE = 360 / LINE_COUNT;
/**
* 秒针的角度
*/
private float angle;
private String time = "00:00";
/**
* 长于普通秒针刻度的驼峰一侧的条数
*/
private static final int LONG_LINE_COUNT = 7;
/**
* 一侧7根长针的角度
*/
private static final int LONG_LINES_ANGLE = ONE_LINE_ANGLE * LONG_LINE_COUNT;
public HuaWeiClock(Context context) {
this(context, null);
}
public HuaWeiClock(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public HuaWeiClock(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.HuaWeiClock);
backgroundColor = typedArray.getColor(R.styleable.HuaWeiClock_backgroundColor, Color.parseColor("#003560"));
secondLineColor = typedArray.getColor(R.styleable.HuaWeiClock_secondLineColor, Color.WHITE);
secondPointColor = typedArray.getColor(R.styleable.HuaWeiClock_secondPointColor, Color.parseColor("#CE3228"));
timeColor = typedArray.getColor(R.styleable.HuaWeiClock_timeColor, Color.WHITE);
typedArray.recycle();
initPaint();
startTime();
}
/**
* 初始化画笔
*/
private void initPaint() {
mPaint = new Paint();
mPaint.setAntiAlias(true);
}
/**
* 获取时间，并通过RxJava实现动画
*/
private void startTime() {
//延时0秒后每隔100毫秒，刷新一次UI
Observable.interval(0, 100, TimeUnit.MILLISECONDS)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Consumer() {
@Override
public void accept(Long aLong) throws Exception {
Calendar calendar = Calendar.getInstance();
int second = calendar.get(Calendar.SECOND);
int milliSecond = calendar.get(Calendar.MILLISECOND);
angle = (float) (second * 1000 + milliSecond) * 6 / 1000f;
SimpleDateFormat minuteFormat = new SimpleDateFormat("HH:mm");
time = minuteFormat.format(calendar.getTime());
postInvalidate();
}
}, new Consumer() {
@Override
public void accept(Throwable throwable) throws Exception {
Logger.d(throwable.getMessage());
}
});
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = 0;
int height = 0;
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
switch (widthMode) {
case MeasureSpec.AT_MOST:
width = widthSize * 3 / 4;
break;
case MeasureSpec.EXACTLY:
width = widthSize;
break;
case MeasureSpec.UNSPECIFIED:
break;
default:
break;
}
switch (heightMode) {
case MeasureSpec.AT_MOST:
height = heightSize / 2;
break;
case MeasureSpec.EXACTLY:
height = heightSize;
break;
case MeasureSpec.UNSPECIFIED:
break;
default:
break;
}
widthBg = width;
heightBg = height;
watchRadius = height * 2 / 5;
setMeasuredDimension(width, height);
}
@Override
protected void onDraw(Canvas canvas) {
drawBg(canvas);
drawTickMark(canvas);
drawSecondPoint(canvas);
drawTime(canvas);
}
/**
* 画背景
*
* @param canvas 画板
*/
private void drawBg(Canvas canvas) {
mPaint.setColor(backgroundColor);
mPaint.setStyle(Paint.Style.FILL);
RectF rectBg = new RectF(0, 0, widthBg, heightBg);
canvas.drawRect(rectBg, mPaint);
}
/**
* 画刻度线
*
* @param canvas 画板
*/
private void drawTickMark(Canvas canvas) {
mPaint.setColor(secondLineColor);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(3);
for (int i = 0; i < LINE_COUNT; i++) {
//角度差的绝对值
float absoluteValue = Math.abs(i * ONE_LINE_ANGLE - angle);
//求 刻度针线 和 秒针 之间的角度（小于180度）
float differenceAngle = absoluteValue <= 180 ? absoluteValue : 360 - absoluteValue;
//大于七根长线刻度的线，那么长度固定
if (differenceAngle > LONG_LINES_ANGLE) {
canvas.drawLine(widthBg / 2, heightBg / 2 - watchRadius, widthBg / 2, heightBg / 2 - watchRadius + LINE_MIN_LENGTH, mPaint);
canvas.rotate(3, widthBg / 2, heightBg / 2);
} else {
canvas.drawLine(widthBg / 2, heightBg / 2 - watchRadius - (1 - differenceAngle / LONG_LINES_ANGLE) * (LINE_MAX_LENGTH - LINE_MIN_LENGTH), widthBg / 2, heightBg / 2 - watchRadius + LINE_MIN_LENGTH, mPaint);
canvas.rotate(3, widthBg / 2, heightBg / 2);
}
}
}
/**
* 画秒表的红点
*
* @param canvas 画布
*/
private void drawSecondPoint(Canvas canvas) {
mPaint.setColor(secondPointColor);
mPaint.setStyle(Paint.Style.FILL);
int secondPointRadiusBig = watchRadius - LINE_MIN_LENGTH - SECOND_POINT_RADIUS - 20;
double pointAngle = angle * Math.PI / 180;
canvas.drawCircle((float) (widthBg / 2 + secondPointRadiusBig * Math.sin(pointAngle)), (float) (heightBg / 2 - secondPointRadiusBig * Math.cos(pointAngle)), SECOND_POINT_RADIUS, mPaint);
}
/**
* 画时间
*
* @param canvas 画布
*/
private void drawTime(Canvas canvas) {
mPaint.setColor(timeColor);
mPaint.setStyle(Paint.Style.FILL);
mPaint.setTextSize(widthBg / 7);
Rect bounds = new Rect();
mPaint.getTextBounds(time, 0, time.length(), bounds);
Paint.FontMetricsInt fontMetrics = mPaint.getFontMetricsInt();
int baseline = (getMeasuredHeight() - fontMetrics.bottom + fontMetrics.top) / 2 - fontMetrics.top;
canvas.drawText(time, getMeasuredWidth() / 2 - bounds.width() / 2, baseline, mPaint);
}
}
最后在布局文件中引入：
收工~~~