Android如何自定义view实现日历打卡签到

这篇文章主要介绍Android如何自定义view实现日历打卡签到，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

Android是什么

Android是一种基于Linux内核的自由及开放源代码的操作系统，主要使用于移动设备，如智能手机和平板电脑，由美国Google公司和开放手机联盟领导及开发。

1.说明

自己写一个view实现每天签到的功能，设置背景图片

源码下载

2.效果图

3.主界面

package com.example.myapplication30;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
 
public class MainActivity extends AppCompatActivity {
    //参考网址：https://blog.csdn.net/MacaoPark/article/details/102069775
    private TextView mTvDaySum;
    private TextView mTvMonth;
    private SignView mCvCalendar;
    private List<SignEntity> data;
    private Calendar calendar;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTvDaySum = findViewById(R.id.punch_tv_day_sum);
        mTvMonth = findViewById(R.id.punch_tv_month);
        mCvCalendar = findViewById(R.id.punch_cv_calendar);
    }
 
    @Override
    protected void onStart() {
        super.onStart();
        onReady();
    }
 
    @SuppressLint("SetTextI18n")
    private void onReady() {
          calendar = Calendar.getInstance();
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        //int date =  calendar.get(Calendar.DATE);
        int dayOfMonthToday = calendar.get(Calendar.DAY_OF_MONTH);
        List<SignDate> signDates = new ArrayList<>();
        signDates.add(new SignDate(2021, 5, 1, true));
        signDates.add(new SignDate(2021, 5, 2, true));
        signDates.add(new SignDate(2021, 5, 3, true));
        signDates.add(new SignDate(2021, 5, 4, true));
        signDates.add(new SignDate(2021, 5, 5, true));
 
        mTvDaySum.setText("本期连续登录\t"+signDates.size()+"\t天");
        mTvMonth.setText(year+"年"+getResources().getStringArray(R.array.month_array)[month]+"\t"+dayOfMonthToday+"日");
 
        data = new ArrayList<>();
        for (int i = 1; i <= dayOfMonthToday; i++) {
            SignEntity signEntity = new SignEntity();
            if (i == dayOfMonthToday) {
                signEntity.setDayType(2);
            } else {
                signEntity.setDayType(1);
            }
            for (int j = 0; j < signDates.size(); j++) {
                if (signDates.get(j).getDay() == i) {
                    signEntity.setDayType(0);
                    break;
                } else if (dayOfMonthToday == i) {
                    signEntity.setDayType(2);
                } else {
                    signEntity.setDayType(1);
                }
            }
            data.add(signEntity);
        }
 
        SignAdapter signAdapter = new SignAdapter(data);
        mCvCalendar.setAdapter(signAdapter);
    }
 
}

4.适配器

package com.example.myapplication30;
 
 
import java.util.List;
 
/**
 * SignAdapter
 * Created by E.M on 2016/4/21.
 */
public class SignAdapter extends CalendarAdapter {
    private List<SignEntity> data;
 
    public SignAdapter(List<SignEntity> data) {
        this.data = data;
    }
 
    @Override
    public SignView.DayType getType(int dayOfMonth) {
        return SignView.DayType.valueOf(data.get(dayOfMonth - 1).getDayType());
    }
}

5.自定义view

package com.example.myapplication30;
 
 
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ComposeShader;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.RadialGradient;
import android.graphics.Rect;
import android.graphics.Shader;
import android.graphics.SweepGradient;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
 
 
import java.util.Calendar;
 
/**
 * 签到日历控件
 * Created by E.M on 2016/4/20.
 */
public class SignView extends View {
    private static final String[] WEEK_MARK = {"一", "二", "三", "四", "五", "六", "日"};
 
    private static final int MAX_COLUMN = 7;
    /**
     * 周内
     */
    private static final int COLOR_MARKER_WEEKDAY = 0xFF999999;
    private static final int COLOR_MARKER_WEEKEND = 0xFF1B89CD;
    /**
     * 已签到背景色
     */
    //private static final int COLOR_BACKGROUND_HIGHLIGHT = 0xFFFF0000;
    /**
     * 未签到背景色
     */
    private static final int COLOR_BACKGROUND_NORMAL = 0xFF9C9C9C;
    /**
     * 等待签到背景色
     */
    private static final int COLOR_BACKGROUND_WAIT = 0xFFFE7471;
    /**
     * 已签到文字颜色
     */
    private static final int COLOR_TEXT_HIGHLIGHT = 0xFFFFFFFF;
    /**
     * 未签到文字颜色
     */
    private static final int COLOR_TEXT_NORMAL = 0xFF606060;
//    /**
//     * 不可用文字颜色
//     */
//    private static final int COLOR_TEXT_DISABLED = 0xFFD4D4D4;
 
    private static final int MARKER_TEXT_SIZE = 40;
    private static final int CELL_TEXT_SIZE = 40;
 
    private static final int VERTICAL_SPACE = 51;
    private static final int VERTICAL_MARGIN = 62;
    private static final int HORIZONTAL_MARGIN = 39;
    private static final int CELL_SIZE = 80;
    private static final int WAIT_LINE_SIZE = 14;
 
    private int dayOfMonthToday;
    private int markerTextY;
    private int verticalCellTop;
    private int sumDayOfMonth;
    private int daysOfFirstWeek;
    private int horizontalSpace;
    private int deltaTextCellY;
    private int deltaTextMarkerY;
 
    private int verticalSpace;
    private int verticalMargin;
    private int horizontalMargin;
    private int cellSize;
    private int waitLineSize;
 
    private Path waitPath;
    private Rect waitRect;
    private Paint paintWeekday;
    private Paint paintWeekend;
    private Paint paintTextNormal;
    private Paint paintTextHighlight;
    private Paint paintBackgroundWait;
    private Paint paintBackgroundNormal;
    private Paint paintBackgroundHighlight;
    private CalendarAdapter adapter;
 
    public SignView(Context context) {
        this(context, null);
    }
 
    public SignView(Context context, AttributeSet attrs) {
        this(context, attrs, -1);
    }
 
    public SignView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initResolution();
        initPaint();
        initData();
    }
 
    private void initResolution() {
//        resolutionUtil = ResolutionUtil.getInstance();
//        verticalSpace = resolutionUtil.formatVertical(VERTICAL_SPACE);
//        verticalMargin = resolutionUtil.formatVertical(VERTICAL_MARGIN);
//        horizontalMargin = resolutionUtil.formatHorizontal(HORIZONTAL_MARGIN);
//        cellSize = resolutionUtil.formatVertical(CELL_SIZE);
//        waitLineSize = resolutionUtil.formatVertical(WAIT_LINE_SIZE);
        verticalSpace = VERTICAL_SPACE;
        verticalMargin = VERTICAL_MARGIN;
        horizontalMargin = HORIZONTAL_MARGIN;
        cellSize = CELL_SIZE;
        waitLineSize = WAIT_LINE_SIZE;
 
    }
 
    private void initPaint() {
//        int markerTextSize = resolutionUtil.formatVertical(MARKER_TEXT_SIZE);
//        int cellTextSize = resolutionUtil.formatVertical(CELL_TEXT_SIZE);
        int markerTextSize = MARKER_TEXT_SIZE;
        int cellTextSize = CELL_TEXT_SIZE;
 
        paintWeekday = new Paint();
        paintWeekday.setAntiAlias(true);
        paintWeekday.setColor(COLOR_MARKER_WEEKDAY);
        paintWeekday.setTextSize(markerTextSize);
        paintWeekday.setTextAlign(Paint.Align.CENTER);
 
        paintWeekend = new Paint();
        paintWeekend.setAntiAlias(true);
        paintWeekend.setColor(COLOR_MARKER_WEEKEND);
        paintWeekend.setTextSize(markerTextSize);
        paintWeekend.setTextAlign(Paint.Align.CENTER);
 
        paintTextNormal = new Paint();
        paintTextNormal.setAntiAlias(true);
        paintTextNormal.setColor(COLOR_TEXT_NORMAL);
        paintTextNormal.setTextSize(cellTextSize);
        paintTextNormal.setTextAlign(Paint.Align.CENTER);
 
        paintTextHighlight = new Paint();
        paintTextHighlight.setAntiAlias(true);
        paintTextHighlight.setColor(COLOR_TEXT_HIGHLIGHT);
        paintTextHighlight.setTextSize(cellTextSize);
        paintTextHighlight.setTextAlign(Paint.Align.CENTER);
 
        paintBackgroundWait = new Paint();
        paintBackgroundWait.setAntiAlias(true);
        paintBackgroundWait.setColor(COLOR_BACKGROUND_WAIT);
        paintBackgroundWait.setStrokeWidth(2);
        paintBackgroundWait.setStyle(Paint.Style.STROKE);
 
        paintBackgroundNormal = new Paint();
        paintBackgroundNormal.setAntiAlias(true);
        paintBackgroundNormal.setColor(COLOR_BACKGROUND_NORMAL);
        paintBackgroundNormal.setStrokeWidth(2);
        paintBackgroundNormal.setStyle(Paint.Style.STROKE);
 
        paintBackgroundHighlight = new Paint();
        paintBackgroundHighlight.setAntiAlias(true);
        paintBackgroundHighlight.setStrokeWidth(2);
        paintBackgroundHighlight.setStyle(Paint.Style.FILL);
        //颜色
        //paintBackgroundHighlight.setColor(COLOR_BACKGROUND_HIGHLIGHT);
        //多种颜色数组
        //int[] colors = {Color.RED,Color.GREEN,Color.BLUE,Color.YELLOW,Color.MAGENTA};
        //float[] position = {0f, 0.2f, 0.4f, 0.6f, 1.0f};
        //Shader shader1 = new LinearGradient(100,850,600,850,colors,position,Shader.TileMode.CLAMP);
        //paintBackgroundHighlight.setShader(shader1);
        //设置背景图片
       /* Bitmap placeholder = BitmapFactory.decodeResource(getResources(), R.mipmap.small);
        Shader shader1 = new BitmapShader(placeholder, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
        paintBackgroundHighlight.setShader(shader1);*/
 
 
    }
 
    private void initData() {
        Paint.FontMetricsInt fmiMarker = paintWeekday.getFontMetricsInt();
        deltaTextMarkerY = -(fmiMarker.bottom - fmiMarker.top) / 2 - fmiMarker.top;
        markerTextY = verticalMargin + cellSize / 2;
 
        Paint.FontMetricsInt fmiCell = paintTextNormal.getFontMetricsInt();
        deltaTextCellY = -(fmiCell.bottom - fmiCell.top) / 2 - fmiCell.top;
        verticalCellTop = verticalMargin + cellSize;
 
        Calendar calendarToday = Calendar.getInstance();
        dayOfMonthToday = calendarToday.get(Calendar.DAY_OF_MONTH);
        int dayOfWeek;
        sumDayOfMonth = calendarToday.getActualMaximum(Calendar.DAY_OF_MONTH);
 
        Calendar calendarFirstDay = Calendar.getInstance();
        calendarFirstDay.set(Calendar.DAY_OF_MONTH, 1);
        dayOfWeek = calendarFirstDay.get(Calendar.DAY_OF_WEEK);
        if (dayOfWeek == Calendar.SUNDAY) {
            dayOfWeek = 7;
        } else {
            dayOfWeek = dayOfWeek - 1;
        }
        daysOfFirstWeek = MAX_COLUMN - dayOfWeek + 1;
    }
 
    private void createWaitBackground(int topX, int topY) {
        waitPath = new Path();
        waitPath.moveTo(topX, topY + waitLineSize);
        waitPath.lineTo(topX, topY);
        waitPath.lineTo(topX + waitLineSize, topY);
 
        waitPath.moveTo(topX + cellSize - waitLineSize, topY + cellSize);
        waitPath.lineTo(topX + cellSize, topY + cellSize);
        waitPath.lineTo(topX + cellSize, topY + cellSize - waitLineSize);
 
        waitRect = new Rect(topX, topY, topX + cellSize, topY + cellSize);
    }
 
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        horizontalSpace = (w - MAX_COLUMN * cellSize - horizontalMargin * 2) / (MAX_COLUMN - 1);
    }
 
    @Override
    public void draw(Canvas canvas) {
        super.draw(canvas);
        drawWeekMark(canvas);
        drawCellsBackground(canvas);
        drawCells(canvas);
    }
 
    private void drawWeekMark(Canvas canvas) {
        int y = markerTextY + deltaTextMarkerY;
        for (int i = 0; i < 7; i++) {
            int x = horizontalMargin + i * (horizontalSpace + cellSize)
                    + cellSize / 2;
            if (i < 5) {
                canvas.drawText(WEEK_MARK[i], x, y, paintWeekday);
            } else {
                canvas.drawText(WEEK_MARK[i], x, y, paintWeekend);
            }
        }
    }
 
    private void drawCellsBackground(Canvas canvas) {
        for (int i = 1; i <= dayOfMonthToday; i++) {
            drawCellBackground(canvas, i, getColumnIndex(i), getRowIndex(i));
        }
    }
 
    /**
     * 根据行列序号绘制日期背景
     *
     * @param canvas     画布
     * @param dayOfMonth 日期
     * @param column     列序号
     * @param row        行序号
     */
    private void drawCellBackground(Canvas canvas, int dayOfMonth, int column, int row) {
        int x = horizontalMargin + column * (horizontalSpace + cellSize)
                + cellSize / 2;
        int y = verticalCellTop + verticalSpace * (row + 1) + cellSize * row + cellSize / 2;
        if (adapter != null) {
            DayType dayType = adapter.getType(dayOfMonth);
            switch (dayType) {
                case WAITING:
                    if (waitPath == null) {
                        createWaitBackground(x - cellSize / 2, y - cellSize / 2);
                    }
                    canvas.drawPath(waitPath, paintBackgroundWait);
                    break;
                case SIGNED:
                 //     canvas.drawCircle(x, y, cellSize/2, paintBackgroundHighlight);
                //  canvas.drawRect(x - 60, y - 60, x + 60, y + 60, paintBackgroundHighlight);// 正方形
                   // Bitmap placeholder = BitmapFactory.decodeResource(getResources(), R.mipmap.purtest);
                 //   canvas.drawBitmap(placeholder,);wCircle(x, y, cellSize/2, paintBackgroundHighlight);
                    canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.mipmap.small3),x-40, y-40 , paintBackgroundHighlight);
                    break;
                default:
                    canvas.drawCircle(x, y, cellSize / 2, paintBackgroundNormal);
                    break;
            }
        } else {
            canvas.drawCircle(x, y, cellSize / 2, paintBackgroundNormal);
        }
    }
 
    private void drawCells(Canvas canvas) {
        for (int i = 1; i <= sumDayOfMonth; i++) {
            drawCell(canvas, i, getColumnIndex(i), getRowIndex(i));
        }
    }
 
    /**
     * 根据行列序号绘制日期
     *
     * @param canvas     画布
     * @param dayOfMonth 日期
     * @param column     列序号
     * @param row        行序号
     */
    private void drawCell(Canvas canvas, int dayOfMonth, int column, int row) {
        int x = horizontalMargin + column * (horizontalSpace + cellSize)
                + cellSize / 2;
        int y = verticalCellTop + verticalSpace * (row + 1) + cellSize * row + cellSize / 2
                + deltaTextCellY;
        if (adapter != null && dayOfMonth <= dayOfMonthToday) {
            DayType dayType = adapter.getType(dayOfMonth);
            Paint paint;
            switch (dayType) {
                case SIGNED:
                    paint = paintTextHighlight;
                    break;
                default:
                    paint = paintTextNormal;
                    break;
            }
            canvas.drawText(String.valueOf(dayOfMonth), x, y, paint);
        } else {
            canvas.drawText(String.valueOf(dayOfMonth), x, y, paintTextNormal);
        }
    }
 
    /**
     * 获取列序号
     *
     * @param dayOfMonth 日期
     * @return 列序号
     */
    private int getColumnIndex(int dayOfMonth) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
        int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        if (dayOfWeek == Calendar.SUNDAY) {
            dayOfWeek = 6;
        } else {
            dayOfWeek = dayOfWeek - 2;
        }
        return dayOfWeek;
    }
 
    /**
     * 获取行序号
     *
     * @param dayOfMonth 日期
     * @return 行序号
     */
    private int getRowIndex(int dayOfMonth) {
        float weight = (dayOfMonth - daysOfFirstWeek) / (MAX_COLUMN * 1f);
        double rowIndexDouble = Math.abs(Math.ceil(weight));
        return (int) rowIndexDouble;
    }
 
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {
            float x = event.getX();
            float y = event.getY();
            if (waitPath != null) {
                if (adapter.getType(dayOfMonthToday).equals(DayType.WAITING)) {
                    if (x >= waitRect.left && y >= waitRect.top && x <= waitRect.right && y <= waitRect.bottom) {
                        if (onTodayClickListener != null) {
                            onTodayClickListener.onTodayClick();
                        }
                    }
                }
            }
        }
        return true;
    }
 
    public void setAdapter(CalendarAdapter adapter) {
        this.adapter = adapter;
        this.invalidate();
    }
 
    public int getDayOfMonthToday() {
        return dayOfMonthToday;
    }
 
    public void notifyDataSetChanged() {
        invalidate();
    }
 
    private OnTodayClickListener onTodayClickListener;
 
    public void setOnTodayClickListener(OnTodayClickListener onTodayClickListener) {
        this.onTodayClickListener = onTodayClickListener;
    }
 
    public interface OnTodayClickListener {
        void onTodayClick();
    }
 
    public enum DayType {
        /**
         * 已签到状态，时间已过
         */
        SIGNED(0),
        /**
         * 未签到状态，时间已过
         */
        UNSIGNED(1),
        /**
         * 等待状态，即当日还未签到
         */
        WAITING(2),
        /**
         * 不可达到状态，未到时间
         */
        UNREACHABLE(3),
        /**
         * 不可用状态，非当前月份
         */
        DISABLED(4);
 
        private int value;
 
        DayType(int value) {
            this.value = value;
        }
 
        public int getValue() {
            return value;
        }
 
        public static DayType valueOf(int value) {
            switch (value) {
                case 0:
                    return SIGNED;
                case 1:
                    return UNSIGNED;
                case 2:
                    return WAITING;
                case 3:
                    return UNREACHABLE;
                case 4:
                    return DISABLED;
                default:
                    return DISABLED;
            }
        }
    }
}

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