日历控件头部的绘制

/** * Copyright (c) 2012 All rights reserved * 描述：日历控件头部绘制类 * @author LiuZiwei * @date：2014-4-28 */public class CalendarHeader extends View {/** The m paint. */private final Paint mPaint; /** The rect. */private RectF rect = new RectF();//星期的数据/** The day name. */private String[] dayName = new String[10];/** The width. */private int width = 320;    /** 每个单元格的宽度. */private int cellWidth = 40;/** 文字颜色. */private int defaultTextColor = Color.rgb(255,255,255);/** 特别文字颜色. *///private int specialTextColor = Color.rgb(240, 140, 26);/** 字体大小. */private int defaultTextSize = 25;/** 字体是否加粗. */private boolean defaultTextBold = false;/** 是否有设置头部背景. */private boolean hasBg = false;/** * 日历头. * * @param context the context */public CalendarHeader(Context context) {this(context, null);}/** * Instantiates a new calendar header. * * @param context the context * @param attributeset the attributeset */@SuppressWarnings("deprecation")public CalendarHeader(Context context, AttributeSet attributeset) {super(context);dayName[Calendar.SUNDAY] = "周日";dayName[Calendar.MONDAY] = "周一";dayName[Calendar.TUESDAY] = "周二";dayName[Calendar.WEDNESDAY] = "周三";dayName[Calendar.THURSDAY] = "周四";dayName[Calendar.FRIDAY] = "周五";dayName[Calendar.SATURDAY] = "周六";mPaint = new Paint();         mPaint.setColor(defaultTextColor);        mPaint.setAntiAlias(true);         mPaint.setTypeface(Typeface.DEFAULT);        mPaint.setTextSize(defaultTextSize);                WindowManager wManager = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);    Display display = wManager.getDefaultDisplay();    width = display.getWidth();    display.getHeight();cellWidth = (width-20)/7;}/** * 描述：设置背景. * * @param resid the new header background resource */ public void setHeaderBackgroundResource(int resid){ setBackgroundResource(resid); hasBg = true; } /**  * 描述 设置背景色  * @param resid 颜色  */public void setHeaderBackgroundColor(int resid){setBackgroundColor(resid);hasBg = true;}/** * 描述：文字大小. * * @return the text size */public int getTextSize() {return defaultTextSize;}/** * 描述：设置文字大小. * * @param mTextSize the new text size */public void setTextSize(int mTextSize) {this.defaultTextSize = mTextSize;mPaint.setTextSize(defaultTextSize);this.invalidate();}  /** * 描述：TODO. * * @param canvas the canvas * @see android.view.View#onDraw(android.graphics.Canvas) * @author: zhaoqp * @date：2013-7-19 下午4:30:45 * @version v1.0 */@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);if(!hasBg){   canvas.drawColor(Color.WHITE);   //设置矩形大小   rect.set(0, 0, this.getWidth(),this.getHeight());   rect.inset(0.5f,0.5f);}// 绘制日历头部drawDayHeader(canvas);}/** * Draw day header. * * @param canvas the canvas */private void drawDayHeader(Canvas canvas) {// 写入日历头部，设置画笔参数if(!hasBg){// 画矩形，并设置矩形画笔的颜色mPaint.setColor(Color.rgb(183, 183,183));canvas.drawRect(rect, mPaint);}if(defaultTextBold){mPaint.setFakeBoldText(true);}mPaint.setColor(defaultTextColor);for (int iDay = 1; iDay < 8; iDay++) {/*if(iDay==1 || iDay==7){mPaint.setColor(specialTextColor);}*/// draw day namefinal String sDayName = getWeekDayName(iDay);TextPaint mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);        mTextPaint.setTypeface(Typeface.DEFAULT_BOLD);        mTextPaint.setTextSize(defaultTextSize);        FontMetrics fm  = mTextPaint.getFontMetrics();        //得到行高        int textHeight = (int)Math.ceil(fm.descent - fm.ascent);        int textWidth = (int)AbGraphical.getStringWidth(sDayName,mTextPaint);final int iPosX = (int) rect.left +cellWidth*(iDay-1)+(cellWidth-textWidth)/2;final int iPosY = (int) (this.getHeight()- (this.getHeight() - textHeight) / 2 - mPaint.getFontMetrics().bottom);canvas.drawText(sDayName, iPosX, iPosY, mPaint);mPaint.setColor(defaultTextColor);}}/** * 描述：获取星期的文字描述. * * @param calendarDay the calendar day * @return the week day name */public String getWeekDayName(int calendarDay) {return dayName[calendarDay];}}