Android 實現(xiàn)簽到足跡功能

更新時間：2021年04月10日 10:55:12 作者：xiaolei123

這篇文章主要介紹了Android 實現(xiàn)簽到足跡功能的示例，幫助大家更好的理解和學習使用Android，感興趣的朋友可以了解下

首先我們把線畫出來，大概這個樣子

我們這里根據(jù)一個月得總天數(shù)，和一條線上需要畫七個圖，計算出總共需要畫出的線條數(shù)，以及畫出左邊和右邊的弧度，根據(jù)當前線是單數(shù)還是雙數(shù)，來計算出是否是左半邊的弧度，還是右半邊的弧度，以及是否是最后的一條線，因為最后一條線不需要畫弧度。

代碼如下：

    @Override
    protected void onDraw(Canvas canvas)
{
        paint.setColor(backColor);
        paint.setStrokeWidth(strokeWidth);
        int rowCount = (monthDays % 7 == 0 ? monthDays / 7 : monthDays / 7 + 1);
        int rowHeigh = height / (rowCount);
        int startX = 0 + rowHeigh / 2;
        int endX = width - rowHeigh / 2;
        int days = 0;

        for (int a = 0; a < rowCount; a++)
        {
            if (a + 1 == rowCount)
            {
                endX = (endX - startX) / 7 * (monthDays % 7) + checkBitmap.getWidth() / 2;
            }
            paint.setStrokeWidth(strokeWidth);
            int y = rowHeigh * a + rowHeigh / 2;
            canvas.drawLine(startX, y, endX, y, paint);

            paint.setColor(rashColor);
            paint.setStrokeWidth(1);
            canvas.drawLine(startX, y, endX, y, paint);
            // 這里是來判斷，是否需要畫出左半邊還是右半邊的半圓弧度？
            if (a % 2 != 0)
            {
                if (a + 1 != rowCount)
                {
                    drawLeftOrRightArc(true, canvas, 0 + strokeWidth, y, 0 + rowHeigh + strokeWidth, y + rowHeigh);
                }
            } else
            {
                if (a + 1 != rowCount)
                {
                    drawLeftOrRightArc(false, canvas, endX - rowHeigh / 2 - strokeWidth, y, endX + rowHeigh / 2 - strokeWidth, y + rowHeigh);
                }
            }
        }
    }

然后再在線上畫出禮物數(shù)量

            // 這里是來判斷，本次這根線上畫出的禮物的點，以及順序是順畫，還是倒畫出。
            bitmapList.clear();
            for (int b = 0; b < (a + 1 == rowCount ? (monthDays % 7) : 7); b++)
            {
                days++;
                if (days <= signInCount)
                {
                    if (days == 3 || days == 8 || days == 14 || days == 21 || days == monthDays)
                    {
                        bitmapList.add(a % 2 != 0 ? 0 : bitmapList.size(), openGiftBitmap);
                    } else
                    {
                        bitmapList.add(a % 2 != 0 ? 0 : bitmapList.size(), checkBitmap);
                    }
                } else
                {
                    if (days == 3 || days == 8 || days == 14 || days == 21 || days == monthDays)
                    {
                        bitmapList.add(a % 2 != 0 ? 0 : bitmapList.size(), closeGiftBitmap);
                    } else
                    {
                        bitmapList.add(a % 2 != 0 ? 0 : bitmapList.size(), uncheckBitmap);
                    }
                }
            }

這里有一個需要注意的地方，就是，在線為雙數(shù)的時候，這時候禮物的排列是需要反過來排列的，我這里使用了一個LinkedList來保存禮物的排列順序，然后我們通過計算平均數(shù)，計算出每個禮物的位置。

    /**
     * 畫出的按路線上的圖片，勾選，禮物
     * @param bitmapList
     * @param startX
     * @param endX
     * @param y
     * @param canvas
     */
    private void drawImgs(List<Bitmap> bitmapList, float startX, float endX, float y, Canvas canvas)
{
        startX = startX - bitmapList.get(0).getWidth() / 2;
        int count = bitmapList.size();
        float bitmap_width = (endX - startX) / (count - 1);
        for (int a = 0; a < count; a++)
        {
            Bitmap bitmap = bitmapList.get(a);
            canvas.drawBitmap(bitmap, startX + (bitmap_width * a), y - bitmap.getHeight() / 2, paint);
        }
    }

這里也有一個需要注意的地方，就是，當最后一條線是短的時候，這個時候，你的禮物的排列需要按照那條線的開始位置和結(jié)束位置來平均計算每個禮物的位置。

最后，我們在最后一條線最后的位置，畫出文字

/**
     * 畫出文字
     * @param canvas
     * @param y
     * @param x
     */
    private void drawText(Canvas canvas, float y, float x)
{
        int oldColor = paint.getColor();
        Paint.Style old_style = paint.getStyle();

        paint.setStyle(Paint.Style.FILL);
        paint.setColor(textColor);
        String drawText = "已累計簽到"+signInCount+"天";
        paint.setTextSize(DensityUtil.sp2px(getContext(), 15));
        int textHeigh = getStringHeight(drawText);
        int textWidth = getStringWidth(drawText);
        canvas.drawText(drawText, x + textWidth/2, y + textHeigh / 2, paint);

        paint.setColor(oldColor);
        paint.setStyle(old_style);
    }

好了，這就是所有的思路。下面貼一下最新完整代碼：

package com.sjl.keeplive.track;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;

import com.sjl.keeplive.R;

import java.util.LinkedList;
import java.util.List;

public class SignInView extends View {
    private int width, height;
    private int monthDays = 31;//本月有31天
    private Paint paint;
    private RectF oval = new RectF();
    private float strokeWidth = 10;
    private Bitmap checkBitmap, uncheckBitmap, closeGiftBitmap, openGiftBitmap;
    private int backColor = Color.parseColor("#C3DEEA"),
            rashColor = Color.parseColor("#B2CADB"),
            textColor = Color.parseColor("#60ADE5");
    private List<Bitmap> bitmapList = new LinkedList<>();
    private int signInCount = 9;

    public SignInView(Context context) {
        this(context, null);
    }

    public SignInView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public SignInView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs);
    }

    private void init(Context context, AttributeSet attrs) {
        paint = new Paint();
        paint.setAntiAlias(true);
        strokeWidth = DensityUtil.dip2px(6);
        checkBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon_sign_in_check_img);
        uncheckBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon_sign_in_uncheck_img);
        closeGiftBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon_close_gift_img);
        openGiftBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon_open_gift_img);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        height = MeasureSpec.getSize(heightMeasureSpec);
        width = MeasureSpec.getSize(widthMeasureSpec);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    /**
     * 設置本月天數(shù)
     *
     * @param monthDays
     */
    public void setMonthDays(int monthDays) {
        this.monthDays = monthDays;
        if (monthDays == 0) {
            this.monthDays = 31;
        }
        postInvalidate();
    }

    /**
     * 設置一共簽到了幾天
     *
     * @param days
     */
    public void setProgress(int days) {
        this.signInCount = days;
        postInvalidate();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        paint.setColor(backColor);
        paint.setStrokeWidth(strokeWidth);
        int rowCount = (monthDays % 7 == 0 ? monthDays / 7 : monthDays / 7 + 1);
        int rowHeigh = height / (rowCount);
        int startX = 0 + rowHeigh / 2;
        int endX = width - rowHeigh / 2;
        int days = 0;

        for (int a = 0; a < rowCount; a++) {
            if (a + 1 == rowCount) {
                endX = (endX - startX) / 7 * (monthDays % 7 == 0 ? 7 : (monthDays % 7)) + checkBitmap.getWidth() / 2;
            }
            paint.setStrokeWidth(strokeWidth);
            int y = rowHeigh * a + rowHeigh / 2;
            canvas.drawLine(startX, y, endX, y, paint);

            paint.setColor(rashColor);
            paint.setStrokeWidth(1);
            canvas.drawLine(startX, y, endX, y, paint);
            // 這里是來判斷，是否需要畫出左半邊還是右半邊的半圓弧度？
            if (a % 2 != 0) {
                if (a + 1 != rowCount) {
                    drawLeftOrRightArc(true, canvas, 0 + strokeWidth, y, 0 + rowHeigh + strokeWidth, y + rowHeigh);
                }
            } else {
                if (a + 1 != rowCount) {
                    drawLeftOrRightArc(false, canvas, endX - rowHeigh / 2 - strokeWidth, y, endX + rowHeigh / 2 - strokeWidth, y + rowHeigh);
                }
            }

            // 這里是來判斷，本次這根線上畫出的禮物的點，以及順序是順畫，還是倒畫出。
            bitmapList.clear();
            int lastDay = (monthDays % 7) == 0 ? 7 : (monthDays % 7);
            for (int b = 0; b < (a + 1 == rowCount ? (lastDay) : 7); b++) {
                days++;
                if (days <= signInCount) {
                    if (days == 3 || days == 8 || days == 14 || days == 21 || days == monthDays) {
                        bitmapList.add(a % 2 != 0 ? 0 : bitmapList.size(), openGiftBitmap);
                    } else {
                        bitmapList.add(a % 2 != 0 ? 0 : bitmapList.size(), checkBitmap);
                    }
                } else {
                    if (days == 3 || days == 8 || days == 14 || days == 21 || days == monthDays) {
                        bitmapList.add(a % 2 != 0 ? 0 : bitmapList.size(), closeGiftBitmap);
                    } else {
                        bitmapList.add(a % 2 != 0 ? 0 : bitmapList.size(), uncheckBitmap);
                    }
                }
            }

            drawImgs(bitmapList, startX, endX, y, canvas);
        }
        super.onDraw(canvas);
    }

    /**
     * 畫出的按路線上的圖片，勾選，禮物
     *
     * @param bitmapList
     * @param startX
     * @param endX
     * @param y
     * @param canvas
     */
    private void drawImgs(List<Bitmap> bitmapList, float startX, float endX, float y, Canvas canvas) {
        if (!bitmapList.isEmpty()) {
            startX = startX - bitmapList.get(0).getWidth() / 2;
            int count = bitmapList.size();
            float bitmap_width = (endX - startX) / (count - 1);
            for (int a = 0; a < count; a++) {
                Bitmap bitmap = bitmapList.get(a);
                canvas.drawBitmap(bitmap, startX + (bitmap_width * a), y - bitmap.getHeight() / 2, paint);
            }
        }
    }

    /**
     * 這里畫出左邊半圓弧，還是右邊半圓弧
     *
     * @param isLeft
     * @param canvas
     * @param left
     * @param top
     * @param right
     * @param bottom
     */
    private void drawLeftOrRightArc(boolean isLeft, Canvas canvas, float left, float top, float right, float bottom) {
        paint.setStrokeWidth(strokeWidth);
        paint.setColor(backColor);

        if (isLeft) {
            paint.setStyle(Paint.Style.STROKE);
            oval.setEmpty();
            oval.set(left, top, right, bottom);
            canvas.drawArc(oval, 90, 180, false, paint);
            paint.setStrokeWidth(1);
            paint.setColor(rashColor);
            canvas.drawArc(oval, 90, 180, false, paint);
        } else {
            paint.setStyle(Paint.Style.STROKE);
            oval.setEmpty();
            oval.set(left, top, right, bottom);
            canvas.drawArc(oval, 270, 180, false, paint);

            paint.setStrokeWidth(1);
            paint.setColor(rashColor);

            canvas.drawArc(oval, 270, 180, false, paint);
        }
        paint.setStrokeWidth(strokeWidth);
        paint.setColor(backColor);
    }
}

布局文件使用：

 <com.sjl.keeplive.track.SignInView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="visible"/>

項目地址：

鏈接：https://pan.baidu.com/s/1IUh9og2T3IlxeXhaLLOKGg
提取碼：thoc

由于demo集合比較多，單這篇看下面代碼即可：