【Android】自定义View -- 钟表

/**

*画外圆和中心实心圆

*@paramcanvas

*/

privatevoiddrawCircle(Canvascanvas){

Paintpaint=newPaint();

paint.setColor(mRingColor);

paint.setStyle(Paint.Style.STROKE);

paint.setAntiAlias(true);

paint.setDither(true);

paint.setStrokeWidth(getDigit(2));

canvas.drawCircle(mWidth/2,mHeight/2,mDiameter/2,paint);

//画中心的实心圆

paint.setStyle(Paint.Style.FILL);

paint.setColor(mCenterPointColor);

canvas.drawCircle(mWidth/2,mHeight/2,getDigit(4),paint);

}

/**

*画刻度

*@paramcanvas

*/

privatevoiddrawScale(Canvascanvas){

Paintpaint=newPaint();

paint.setStrokeWidth(getDigit(1));

paint.setTextSize(getDigit(10));

paint.setAntiAlias(true);

for(inti=0;i<60;i++){

if(i%5==0){

paint.setStrokeWidth(getDigit(2));

paint.setColor(mLongScaleColor);

paint.setTextSize(getDigit(15));

StringtimeText=""+i/5;

if(i==0){

timeText="12";

}

canvas.drawLine(mWidth/2,mHeight/2-mDiameter/2,mWidth/2,mHeight/2-mDiameter/2+40,paint);

paint.setColor(mTextColor);

canvas.drawText(timeText,mWidth/2-paint.measureText(timeText)/2,mHeight/2-mDiameter/2+80,paint);

}else{

paint.setStrokeWidth(getDigit(1));

paint.setTextSize(getDigit(15));

paint.setColor(mShortScaleColor);

canvas.drawLine(mWidth/2,mHeight/2-mDiameter/2,mWidth/2,mHeight/2-mDiameter/2+20,paint);

}

//旋转画布，每次旋转6度

canvas.rotate(6,mWidth/2,mHeight/2);

}

}

/**

*画指针：时针，分针，秒针

*@paramcanvas

*/

privatevoiddrawIndicator(Canvascanvas){

//保存图层

canvas.save();

canvas.translate(mWidth/2f,mHeight/2f);

Paintpaint=newPaint();

paint.setAntiAlias(true);

paint.setDither(true);

paint.setStrokeWidth(getDigit(3));

paint.setColor(mHourColor);

canvas.drawLine(0,0,getLeftBy(H),getTopBy(H),paint);

paint.setStrokeWidth(getDigit(2));

paint.setColor(mMinuteColor);

canvas.drawLine(0,0,getLeftBy(M),getTopBy(M),paint);

paint.setStrokeWidth(getDigit(1));

paint.setColor(mSecondColor);

canvas.drawLine(0,0,getLeftBy(S),getTopBy(S),paint);

//合并图层

canvas.restore();

}

privatefloatgetLeftBy(intindicator){

floatr=0f;

floatdigit=0;

switch(indicator){

caseH:

r=mHourR;

//根据分钟进行补充,每5分钟进一小格

digit=((mHour%12/12f*60+mMinute/60f*5))%60;

break;

caseM:

r=mMinuteR;

digit=mMinute;

break;

caseS:

r=mSecondR;

digit=mSecond+1;

break;

}

floatleft=(float)Math.sin(digit/60f*Math.PI*2)*r;

if(digit<=30){

returnMath.abs(left);

}else{

return-Math.abs(left);

}

}

privatefloatgetTopBy(intindicator){

floatr=0f;

floatdigit=0;

switch(indicator){

caseH:

r=mHourR;

//根据分钟进行补充,每5分钟进一小格

digit=((mHour%12/12f*60+mMinute/60f*5))%60;

break;

caseM:

r=mMinuteR;

digit=mMinute;

break;

caseS:

r=mSecondR;

digit=mSecond+1;

break;

}

floatleft=(float)Math.cos(digit/60f*Math.PI*2)*r;

if(15<=digit&&digit<=45){

returnMath.abs(left);

}else{

return-Math.abs(left);

}

}

@Override

protectedvoidonMeasure(intwidthMeasureSpec,intheightMeasureSpec){

mWidth=measuredWidth(widthMeasureSpec);

mHeight=measuredHeight(heightMeasureSpec);

setMeasuredDimension(mWidth,mHeight);

//钟表的外圆直径（除去padding）

mDiameter=Math.min(mWidth-getPaddingLeft()-getPaddingRight(),mHeight-getPaddingTop()-getPaddingBottom());

//时针半径外环半径的1/3

mHourR=mDiameter/2f/3;

//分针半径为外环半径的1/2

mMinuteR=mDiameter/2f/2;

//秒针半径为外环半径的1/1.5

mSecondR=mDiameter/2f/1.5f;

}

privateintmeasuredWidth(intwidthMeasureSpec){

intresult=0;

intspecMode=MeasureSpec.getMode(widthMeasureSpec);

intspecSize=MeasureSpec.getSize(widthMeasureSpec);

if(specMode==MeasureSpec.EXACTLY){

result=specSize;

}else{

result=500;

if(specMode==MeasureSpec.AT_MOST){

result=Math.min(result,specSize);

}

}

returnresult;

}

privateintmeasuredHeight(intheightMeasureSpec){

intresult=0;

intspecMode=MeasureSpec.getMode(heightMeasureSpec);

intspecSize=MeasureSpec.getSize(heightMeasureSpec);

if(specMode==MeasureSpec.EXACTLY){

result=specSize;

}else{

result=500;

if(specMode==MeasureSpec.AT_MOST){

result=Math.min(result,specSize);

}

}

returnresult;

}

/**

*启动钟表

*/

privatevoidstartClock(){

newThread(newRunnable(){

@Override

publicvoidrun(){

while(true){

Calendarcalendar=Calendar.getInstance();

calendar.setTime(newDate());

inthour=calendar.get(Calendar.HOUR)+1;

intminute=calendar.get(Calendar.MINUTE);

intsecond=calendar.get(Calendar.SECOND);

setHour(hour);

setMinute(minute);

setSecond(second);

try{

Thread.sleep(1000);

}catch(InterruptedExceptione){

e.printStackTrace();

}

}

}

}).start();

}