Android自定义课程格子
2023-12-02 22:36:16
一两年之前，项目中有大佬写过课程表这个功能，今天复习自定义View，就自己动手写写；有不对的地方，请各位大佬指出来，歇歇-_-
写给我自己，用作学习记录
效果如下：（数据是自己瞎编的）
接下来直接上代码：
1.MainActivity.java：
2.main_activity.xml
3.ScheduleView：课程表控件
package com.example.admin.test.views;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import com.example.admin.test.R;
import com.example.admin.test.utils.DensityUtils;
import java.util.ArrayList;
/**
* Created by Admin on 2018/4/11.
*/
public class ScheduleView extends View {private static String TAG = ScheduleView.class.getSimpleName();
/**
* 单个课程宽度
*/
private int width = 30;
/**
* 单个课程高度
*/
private int height = 15;
/**
* 课程表第一行高度
*/
private int topHeight = 20;
/**
* 课程表左边第一列宽度
*/
private int leftWidth = 20;
/**
* 课程中间间隔高度
*/
private int middleHeight = 20;
private ArrayList<String> list;//课程数据
private String[] days = {"星期一", "星期二", "星期三", "星期四", "星期五", "星期六", "星期日"};
private String[] courseNumber = {"1", "2", "3", "4", "5", "6", "7", "8"};
private int[] colors = {R.color.color_8cbf52, R.color.color_cccccc, R.color.color_ffffff, R.color.color_65686a, R.color.colorPrimary,
R.color.colorPrimaryDark, R.color.colorAccent, R.color.color_ffffff, R.color.color_65686a, R.color.colorPrimary};//课程背景颜色
private int scheduleWidth = 0;//课程表总宽度
private int scheduleheight = 0;//课程表总高度
private Paint paint1;//绘制线条
private Paint paint2;//绘制文字
private Paint paint3;//绘制格子背景
private Paint pFont;//测量文字使用
private Rect rect;//测量文字使用
private ArrayList<String[]> allCourse;//将传进来的数据整理后存在这里
private String[] str;//每一天的课程
private String course;//单个课程名字
private int num = 0;//取颜色用的随机数
public ScheduleView(Context context) {super(context);
init(context);
}public ScheduleView(Context context, @Nullable AttributeSet attrs) {super(context, attrs);
init(context);
}private void init(Context context) {allCourse = new ArrayList();
width = DensityUtils.dp2px(context, 50);
height = DensityUtils.dp2px(context, 40);
topHeight = DensityUtils.dp2px(context, 30);
leftWidth = DensityUtils.dp2px(context, 30);
middleHeight = DensityUtils.dp2px(context, 30);
scheduleWidth = leftWidth + days.length * width;
scheduleheight = topHeight + courseNumber.length * height;
paint1 = new Paint();
paint1.setColor(getResources().getColor(R.color.color_cccccc));
paint1.setAntiAlias(true);
paint1.setStrokeWidth(5);
paint2 = new Paint();
paint2.setColor(getResources().getColor(R.color.color_000000));
paint2.setAntiAlias(true);
paint2.setTextSize(DensityUtils.sp2px(context, 14));
paint2.setStrokeWidth(5);
paint3 = new Paint();
paint3.setColor(colors[(int) (Math.random() * 10)]);
paint3.setAntiAlias(true);
paint3.setStrokeWidth(5);
pFont = new Paint();
pFont.setTextSize(DensityUtils.sp2px(context, 14));
rect = new Rect();
}public void setData(ArrayList<String> list) {this.list = list;
if (this.list == null) {this.list = new ArrayList<>();
}for (int i = 0; i < 56; i += 8) {str = new String[8];
for (int j = 0; j < 8; j++) {str[j] = this.list.get(i + j);
}allCourse.add(str);
str = null;
}}@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}@Override
protected void onDraw(Canvas canvas) {super.onDraw(canvas);
drawTop(canvas);
drawLeft(canvas);
drawOthers(canvas);
}private void drawOthers(Canvas canvas) {for (int i = 0; i < days.length; i++) {for (int j = 0; j < courseNumber.length; j++) {num = (int) (Math.random() * 10);
paint3.setColor(getResources().getColor(colors[num]));
if (j == 3) {//绘制背景色
canvas.drawRect(leftWidth + i * width, topHeight + j * height, leftWidth + (i + 1) * width, topHeight + (j + 1) * height, paint3);
//绘制文字
course = (allCourse.get(i))[j];
pFont.getTextBounds(course, 0, TextUtils.isEmpty(course) ? 0 : course.length(), rect);
canvas.drawText(course, leftWidth + i * width + width / 2 - rect.width() / 2, topHeight + j * height + height / 2 + rect.height() / 2, paint2);
//绘制边线
canvas.drawLine(leftWidth + i * width, topHeight + (j + 1) * height, leftWidth + (i + 1) * width, topHeight + (j + 1) * height, paint1);
canvas.drawLine(leftWidth + (i + 1) * width, topHeight + j * height, leftWidth + (i + 1) * width, topHeight + (j + 1) * height, paint1);
//绘制中间分隔条
paint3.setColor(getResources().getColor(R.color.color_FFF68F));
canvas.drawRect(leftWidth + i * width, topHeight + (j + 1) * height, leftWidth + (i + 1) * width, topHeight + middleHeight + (j + 1) * height, paint3);
canvas.drawLine(leftWidth + i * width, topHeight + (j + 1) * height + middleHeight, leftWidth + (i + 1) * width, topHeight + (j + 1) * height + middleHeight, paint1);
} else if (j > 3) {//绘制背景色
canvas.drawRect(leftWidth + i * width, topHeight + middleHeight + j * height, leftWidth + (i + 1) * width, topHeight + middleHeight + (j + 1) * height, paint3);
//绘制文字
course = (allCourse.get(i))[j];
pFont.getTextBounds(course, 0, TextUtils.isEmpty(course) ? 0 : course.length(), rect);
canvas.drawText(course, leftWidth + i * width + width / 2 - rect.width() / 2, middleHeight + topHeight + j * height + height / 2 + rect.height() / 2, paint2);
//绘制边线
canvas.drawLine(leftWidth + i * width, topHeight + (j + 1) * height + middleHeight, leftWidth + (i + 1) * width, topHeight + (j + 1) * height + middleHeight, paint1);
canvas.drawLine(leftWidth + (i + 1) * width, topHeight + j * height + middleHeight, leftWidth + (i + 1) * width, topHeight + (j + 1) * height + middleHeight, paint1);
} else {//绘制背景色
canvas.drawRect(leftWidth + i * width, topHeight + j * height, leftWidth + (i + 1) * width, topHeight + (j + 1) * height, paint3);
//绘制文字
course = (allCourse.get(i))[j];
pFont.getTextBounds(course, 0, TextUtils.isEmpty(course) ? 0 : course.length(), rect);
canvas.drawText(course, leftWidth + i * width + width / 2 - rect.width() / 2, topHeight + j * height + height / 2 + rect.height() / 2, paint2);
//绘制边线
canvas.drawLine(leftWidth + i * width, topHeight + (j + 1) * height, leftWidth + (i + 1) * width, topHeight + (j + 1) * height, paint1);
canvas.drawLine(leftWidth + (i + 1) * width, topHeight + j * height, leftWidth + (i + 1) * width, topHeight + (j + 1) * height, paint1);
}}}}private void drawLeft(Canvas canvas) {paint3.setColor(getResources().getColor(R.color.color_FFF68F));
canvas.drawRect(0, topHeight, leftWidth, scheduleheight + middleHeight, paint3);
canvas.drawLine(0, topHeight, 0, scheduleheight + middleHeight, paint1);
canvas.drawLine(leftWidth, topHeight, leftWidth, scheduleheight + middleHeight, paint1);
for (int j = 0; j < courseNumber.length + 1; j++) {if (j != 0 && j != courseNumber.length + 1) {pFont.getTextBounds(courseNumber[j - 1], 0, courseNumber[j - 1].length(), rect);
if (j > 4) {canvas.drawText(courseNumber[j - 1], leftWidth / 2 - rect.width() / 2, middleHeight + topHeight + j * height - height / 2 + rect.height() / 2, paint2);
} else {canvas.drawText(courseNumber[j - 1], leftWidth / 2 - rect.width() / 2, topHeight + j * height - height / 2 + rect.height() / 2, paint2);
}}if (j == 4) {canvas.drawLine(0, topHeight + j * height, leftWidth, topHeight + j * height, paint1);
canvas.drawRect(0, topHeight + 4 * height, leftWidth, topHeight + 4 * height + middleHeight, paint3);
canvas.drawLine(0, topHeight + j * height + middleHeight, leftWidth, middleHeight + topHeight + j * height, paint1);
} else if (j > 4) {canvas.drawLine(0, topHeight + j * height + middleHeight, leftWidth, topHeight + j * height + middleHeight, paint1);
} else {canvas.drawLine(0, topHeight + j * height, leftWidth, topHeight + j * height, paint1);
}}}private void drawTop(Canvas canvas) {paint3.setColor(getResources().getColor(R.color.color_FFF68F));
canvas.drawRect(0, 0, scheduleWidth, topHeight, paint3);
canvas.drawLine(0, 0, scheduleWidth, 0, paint1);
canvas.drawLine(0, 0, 0, topHeight, paint1);
canvas.drawLine(0, topHeight, scheduleWidth, topHeight, paint1);
for (int j = 0; j < days.length + 1; j++) {if (j != 0 && j != days.length + 1) {pFont.getTextBounds(days[j - 1], 0, days[j - 1].length(), rect);
canvas.drawText(days[j - 1], leftWidth + j * width - width / 2 - rect.width() / 2, topHeight / 2 + rect.height() / 2, paint2);
}canvas.drawLine(leftWidth + j * width, 0, leftWidth + j * width, topHeight, paint1);
}}
}
还有很多需要改进的地方，之后会继续修改
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