安卓使用Canvas绘制工作日程表

有一个项目要使用工作表，选择使用canvas来绘制，实现显示工作日程的选择，可点击添加和取消。

自定义控件FormView：

package com.sun.elderly.comm.widget;

import com.sun.elderly.comm.ui.interfaces.IFormListener;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.SparseArray;
import android.view.MotionEvent;
import android.view.View;

/**
 * 绘制表格
 * 
 * @author jwzhangjie
 */
public class FormView extends View {

	private int firstX = 0; // 起始点x
	private int firstY = 0; // 起始点y
	private int secondX = 80; // 第二点x
	private int secondY = 50; // 第二点y
	private int widthNum = 8; // 列
	private int heightNum = 10; // 行
	private int secondSideX = 150; // 第二列的宽
	private int sideY = 50; // 行高
	private int firstSidesX = 80; // 第一列的宽
	private int workColor = 0xffADFF2F;
	private int restColor = 0xffAD0F2F;
	private int selectColor = 0xffAD00FF;

	private String[] rowText = null;
	private String[] colText = null;
	private String noData = "-1";

	public void setRowAndColText(String[] rowText, String[] colText) {
		this.rowText = rowText;
		this.colText = colText;
		invalidate();
	}

	public SparseArray<String> list = new SparseArray<String>();
	private SparseArray<String> backList = new SparseArray<String>();

	IFormListener myFormListener;

	public IFormListener getFormListener() {
		return myFormListener;
	}

	public void setFormListener(IFormListener myFormListener) {
		this.myFormListener = myFormListener;
	}

	public FormView(Context context) {
		super(context);
	}

	public FormView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public void init(int width, int height) {
		secondSideX = (width - firstSidesX) / (widthNum - 1);
		// invalidate();
	}

	public void setList(SparseArray<String> list) {
		this.list = list;
		backList.clear();// 重置
	}

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		if (colText != null && rowText != null) {
			drawForm(canvas);
		}
	}

	private void drawForm(Canvas canvas) {
		Paint paint = new Paint();

		paint.setAntiAlias(true);
		paint.setColor(Color.BLACK);
		paint.setStyle(Paint.Style.STROKE);
		paint.setStrokeWidth(2);
		paint.setStyle(Paint.Style.FILL);

		paint.setColor(Color.BLACK);
		paint.setStyle(Paint.Style.STROKE);
		int cellX = 0, cellY = 0, cellBX = 0, cellBY = 0;
		for (int i = 0; i < widthNum; i++){

			for (int j = 0; j < heightNum; j++) {
				if (i == 0) { // 如果是第一列绘制第一列的宽度
					cellX = firstX + i * firstSidesX;
					cellY = firstY + j * sideY;
					cellBX = firstX + (i + 1) * firstSidesX;
					cellBY = firstY + (j + 1) * sideY;
				} else {
					cellX = secondX + (i - 1) * secondSideX;
					cellY = secondY + (j - 1) * sideY;
					cellBX = secondX + i * secondSideX;
					cellBY = secondY + j * sideY;
				}

				canvas.drawRect(cellX, cellY, cellBX, cellBY, paint);
				int cellsNum = i + j * widthNum;
				if (j == 0) {
					drawCellText(canvas, cellX, cellY, cellBX, cellBY,
							rowText[i]);
				}
				if (cellsNum % widthNum != 0) {
					if (!noData.equals(list.get(cellsNum, noData))) {
						if (list.get(cellsNum).equals("0")) {
							drawCellColor(canvas, cellX, cellY, cellBX, cellBY,
									workColor);
						} else {
							drawCellColor(canvas, cellX, cellY, cellBX, cellBY,
									restColor);
						}
					} else if (!noData.equals(backList.get(cellsNum, noData))) {
						drawCellColor(canvas, cellX, cellY, cellBX, cellBY,
								selectColor);
					} else {
						drawCellColor(canvas, cellX, cellY, cellBX, cellBY,
								0xFFF);
					}
				} else {// 绘制第一列
					drawCellText(canvas, cellX, cellY, cellBX, cellBY,
							colText[cellsNum / widthNum]);
				}
			}
		}
	}

	// 绘制单元格中的文字
	private void drawCellText(Canvas canvas, int cellX, int cellY, int cellBX,
			int cellBY, String text) {
		Paint paint = new Paint();
		paint.setFlags(Paint.ANTI_ALIAS_FLAG);
		paint.setColor(Color.BLUE);
		int textSize = (cellBY - cellY) / 5 * 2;
		paint.setTextSize(textSize);
		int textX = cellX + (cellBX - cellX) / 10;
		int textY = cellBY - (cellBY - cellY) / 3;
		canvas.drawText(text, textX, textY, paint);
	}

	// 绘制单元格中的颜色
	private void drawCellColor(Canvas canvas, int cellX, int cellY, int cellBX,
			int cellBY, int color) {
		Paint paint = new Paint();
		// 绘制备选颜色边框以及其中颜色
		paint.setColor(color);
		paint.setStyle(Paint.Style.FILL);
		canvas.drawRect(cellX + 1, cellY + 1, cellBX - 1, cellBY - 1, paint);
	}

	@SuppressLint("ClickableViewAccessibility")
	@Override
	public boolean onTouchEvent(MotionEvent event) {

		float touchX = event.getX();
		float touchY = event.getY();

		int antion = event.getAction();
		if (antion == MotionEvent.ACTION_DOWN) {
			testTouchColorPanel(touchX, touchY);
		}
		return super.onTouchEvent(event);
	}

	// 检测点击事件所在的格数
	public boolean testTouchColorPanel(float x, float y) {
		if (x > secondX && y > secondY
				&& x < firstX + firstSidesX + secondSideX * widthNum
				&& y < firstY + sideY * heightNum) {

			int ty = (int) ((y - firstY) / sideY);
			int tx;

			if (x - firstX - firstSidesX > 0) {
				tx = (int) ((x - firstX - firstSidesX) / secondSideX + 1);
			} else {
				tx = 0;
			}
			int index = ty * widthNum + tx;
			if (noData.equals(list.get(index, noData))) {
				if (!noData.equals(backList.get(index, noData))) {
					backList.remove(index);
					myFormListener.showNum(index, 1);
				} else {
					backList.put(index, "2");
					myFormListener.showNum(index, 2);
				}
				invalidate();
			} else {
				myFormListener.showNum(index, 0);
			}
			return true;
		}
		return false;
	}
}

package com.sun.elderly.test;

import com.sun.elderly.R;
import com.sun.elderly.comm.ui.interfaces.IFormListener;
import com.sun.elderly.comm.widget.FormView;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.SparseArray;
import android.view.ViewTreeObserver;
import android.widget.Toast;

public class DrawFormActivity extends FragmentActivity implements IFormListener {

	private FormView myFormView;
	private SparseArray<String> list = new SparseArray<String>();
	private String[] rowText = { "", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六",
			"星期日" };
	private String[] colText = { "", "9:00", "10:00", "11:00", "12:00",
			"13:00", "14:00", "15:00", "16:00", "17:00" };

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setTitle("工作表");
		setContentView(R.layout.test_drawform);
		myFormView = (FormView) findViewById(R.id.formId);
		list.put(12, "0");// key：位置 ，value：0--已经预约 1--休息时间 2--预备预约占用
		list.put(18, "1");
		list.put(19, "1");
		list.put(21, "0");
		list.put(33, "0");
		list.put(46, "1");
		myFormView.setList(list);
		myFormView.setFormListener(this);
		ViewTreeObserver vto = myFormView.getViewTreeObserver();
		vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
			public boolean onPreDraw() {
				myFormView.getViewTreeObserver().removeOnPreDrawListener(this);
				int height = myFormView.getMeasuredHeight();
				int width = myFormView.getMeasuredWidth();
				myFormView.init(width, height);
				myFormView.setRowAndColText(rowText, colText);
				return true;
			}
		});
	}

	@Override
	public void showNum(int num, int status) {
		switch (status) {
		case 0:
			showInfo(num + "当前时间已经被占用");
			break;
		case 1:
			showInfo("取消选择：" + num);
			break;
		case 2:
			showInfo("选择工作时间： " + num);
			break;
		}
	}

	private void showInfo(String text) {
		Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT)
				.show();
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <com.sun.elderly.comm.widget.FormView
        android:id="@+id/formId"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
		android:layout_margin="10dip"        
        />

</LinearLayout>