DateWidgetDayHeader.java

package com.bigfat.scrolldemo;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.view.View;
import android.widget.LinearLayout.LayoutParams;

/**
 * 日历控件头部绘制类
 *
 * @Descriptio.n: 日历控件头部绘制类
 * @FileName: DateWidgetDayHeader.java
 */
public class DateWidgetDayHeader extends View {
    // 字体大小
    //private final static int fTextSize = 22;
    private Paint pt = new Paint();
    private RectF rect = new RectF();
    private int iWeekDay = -1;

    public DateWidgetDayHeader(Context context, int iWidth, int iHeight) {
        super(context);
        setLayoutParams(new LayoutParams(iWidth, iHeight));
    }

    public DateWidgetDayHeader(Context context, int iWidth) {
        super(context);
        setLayoutParams(new LayoutParams(iWidth, (int) getResources().getDimension(R.dimen.sch_text_size_little) + 10));
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        // 设置矩形大小
        rect.set(0, 0, this.getWidth(), 30);
        rect.inset(1, 1);

        // 绘制日历头部
        drawDayHeader(canvas);
    }

    private void drawDayHeader(Canvas canvas) {
        // 画矩形，并设置矩形画笔的颜色
        pt.setColor(MainActivity.headerBgColor);
        canvas.drawRect(rect, pt);

        // 写入日历头部，设置画笔参数
        pt.setTypeface(null);
        int sizeOfText = (int) this.getResources().getDimension(R.dimen.sch_text_size_little);
        pt.setTextSize(sizeOfText);
        pt.setAntiAlias(true);
//		pt.setFakeBoldText(true);

        // draw day name
        final String sDayName = DayStyle.getWeekDayName(iWeekDay);
        if (iWeekDay == 1 || iWeekDay == 7) {
            pt.setColor(MainActivity.headerHolidayTextColor);
        } else {
            pt.setColor(MainActivity.headerNormalTextColor);
        }
        final int iPosX = (int) rect.left + ((int) rect.width() >> 1)
                - ((int) pt.measureText(sDayName) >> 1);
        final int iPosY = (int) (this.getHeight()
                - (this.getHeight() - getTextHeight()) / 2 - pt
                .getFontMetrics().bottom);
        canvas.drawText(sDayName, iPosX, iPosY + 5, pt);
    }

    // 得到字体高度
    private int getTextHeight() {
        return (int) (-pt.ascent() + pt.descent());
    }

    // 得到一星期的第几天的文本标记
    public void setData(int iWeekDay) {
        this.iWeekDay = iWeekDay;
    }
}