Android简单自定义折线图（自定义view实现）

相信在Android开发中或多或少都会遇到“ 图表 “”类的展示，当然首推大神的MPAndroidChart ，github：https://github.com/PhilJay/MPAndroidChart

但有时候仅仅是为了融合UI设计，所需功能也并不复杂，复用性也一般，MPAndroidChart 就有点大材小用了，并且也会增加了项目的体量，最近群里的朋友有需求，就花点时间通过自定义View写了一个，在此分享给大家：

我的视频 8_clip.gif

Demo地址:http://pan.baidu.com/s/1skKQxv3
<pre>
package com.example.cloud.zqchart;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.TreeMap;
import java.util.TreeSet;

/**

Created by CLOUD on 2017/5/27.
*/

public class ZqChart extends View {
private Paint mPaintbg;
private Paint mPaintMonthbg;
private Paint mPaintLine;
private Paint mPaintText;
private Paint mPaintChoose;
private Paint mPaintTouch;
private int defaultWidth;
private int defaultUnitHeight;
List<Chart> datas;
TreeSet<Chart> months;
private int mChooseMonth;

private List<Chart> mDatasSingle;
private Chart mTouch;
private float lastX;
private float mDMoneyRateW;
private int mMeasuredWidth;



public ZqChart(Context context) {
    super(context);
    init();
}


public ZqChart(Context context, @Nullable AttributeSet attrs) {
    super(context, attrs);
    init();
}

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

private void init() {
    mPaintbg = new Paint();
    mPaintbg.setAntiAlias(true);
    mPaintbg.setStyle(Paint.Style.FILL);
    mPaintbg.setColor(Color.DKGRAY);
    mPaintMonthbg = new Paint();
    mPaintMonthbg.setAntiAlias(true);
    mPaintMonthbg.setStyle(Paint.Style.FILL);
    mPaintMonthbg.setColor(Color.BLACK);

    mPaintLine = new Paint();
    mPaintLine.setAntiAlias(true);
    mPaintLine.setStyle(Paint.Style.STROKE);
    mPaintLine.setColor(Color.WHITE);
    mPaintTouch = new Paint();
    mPaintTouch.setAntiAlias(true);
    mPaintTouch.setStyle(Paint.Style.STROKE);
    mPaintTouch.setStrokeWidth(3);
    mPaintTouch.setColor(Color.WHITE);

    mPaintText = new Paint();
    mPaintText.setAntiAlias(true);
    mPaintText.setStyle(Paint.Style.FILL);
    mPaintText.setColor(Color.WHITE);
    mPaintText.setTextSize(25);

    mPaintChoose = new Paint();
    mPaintChoose.setAntiAlias(true);
    mPaintChoose.setStyle(Paint.Style.FILL);
    mPaintChoose.setColor(Color.WHITE);

    months=new TreeSet<>(new Comparator<Chart>() {
        @Override
        public int compare(Chart o1, Chart o2) {
            return o1.getDateMonth()-o2.getDateMonth();
        }
    });

    defaultWidth=dip2px(getContext(),200);
    defaultUnitHeight=dip2px(getContext(),25);

    mChooseMonth=2;
    mDatasSingle = new ArrayList<>();
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    int widthmode = MeasureSpec.getMode(widthMeasureSpec);
    int heightmode = MeasureSpec.getMode(heightMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);

    if (datas!=null&&datas.size()>0){

        for (Chart data : datas) {
            months.add(data);
        }
        if (widthmode==MeasureSpec.AT_MOST){

            width=defaultWidth;
        }
        if (heightmode==MeasureSpec.AT_MOST){
            height= (int) (defaultUnitHeight*months.size()*1.5);
        }
    }

    setMeasuredDimension(width,height);
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    int measuredHeight = getMeasuredHeight();
    mMeasuredWidth = getMeasuredWidth();
    Rect rect = new Rect(0,0, mMeasuredWidth,measuredHeight);
    canvas.save();
    canvas.clipRect(rect);
    canvas.drawRect(rect,mPaintbg);
    Rect bounds = new Rect();
    mPaintText.getTextBounds("01月",0,"01月".length(), bounds);
    int xUnit=(mMeasuredWidth -bounds.width()*3)/6;
    for (int i = 1; i <=6; i++) {
        String day=""+new DecimalFormat("#00").format(i*5);
        canvas.drawText(day,i*xUnit,measuredHeight-bounds.height(),mPaintText);
    }
    int count=1;
    for (Chart month : months) {
        String day=""+new DecimalFormat("#00").format(month.getDateMonth());
        if (month.getDateMonth()==mChooseMonth){
            mPaintMonthbg.setColor(Color.RED);
        }else {
            mPaintMonthbg.setColor(Color.BLACK);
        }

        RectF oval = new RectF(
                mMeasuredWidth - bounds.width() * 2 - bounds.width() / 2,
                measuredHeight - bounds.height() - count * defaultUnitHeight - bounds.height(),
                mMeasuredWidth - bounds.width() * 2 + bounds.width(),
                measuredHeight - bounds.height() - count * defaultUnitHeight + bounds.height() / 2
        );
        canvas.drawOval(oval,mPaintMonthbg);
        canvas.drawText(day, mMeasuredWidth -bounds.width()*2,measuredHeight-bounds.height()-count*defaultUnitHeight,mPaintText);
        month.setMonthAres(oval);
        count++;
    }
    if (mChooseMonth==0){
        canvas.restore();
        return;
    }


    if (mDatasSingle.size()==0){
        canvas.restore();
        return;
    }

    float minMoney= mDatasSingle.get(0).getMoney();
    float maxMoney= mDatasSingle.get(0).getMoney();
    for (Chart data : mDatasSingle) {
        minMoney=data.getMoney()<minMoney?data.getMoney():minMoney;
        maxMoney=data.getMoney()>maxMoney?data.getMoney():maxMoney;
    }
   float dMoneyRateH=months.size()*defaultUnitHeight/(maxMoney-minMoney);
    mDMoneyRateW = 6*xUnit/(30);
    if (mDatasSingle.size()==1){
        canvas.drawPoint(mDatasSingle.get(0).getDateDay()* mDMoneyRateW,measuredHeight-bounds.height()-(mDatasSingle.get(0).getMoney()-minMoney)*dMoneyRateH,mPaintLine);
        canvas.restore();
        return;
    }
    Path path=new Path();
    Collections.sort(mDatasSingle, new Comparator<Chart>() {
        @Override
        public int compare(Chart o1, Chart o2) {
            return o1.getDateDay()-o2.getDateDay();
        }
    });
    float starX = mDatasSingle.get(0).getDateDay() * mDMoneyRateW;
    float starY = measuredHeight - bounds.height()*2 - (mDatasSingle.get(0).getMoney()-minMoney) * dMoneyRateH;
    path.moveTo(starX, starY);
    mDatasSingle.get(0).pointX=starX;
    mDatasSingle.get(0).pointY=starY;
    mDatasSingle.get(0).ares=new RectF(starX- mDMoneyRateW /2,measuredHeight-bounds.height()-months.size()*defaultUnitHeight,starX+ mDMoneyRateW /2,measuredHeight-bounds.height());
    for (int i = 1; i < mDatasSingle.size(); i++) {
        float x = mDatasSingle.get(i).getDateDay() * mDMoneyRateW;
        float y = measuredHeight - bounds.height()*2 - (mDatasSingle.get(i).getMoney()-minMoney) * dMoneyRateH;
        path.lineTo(x, y);
        mDatasSingle.get(i).pointX=x;
        mDatasSingle.get(i).pointY=y;
        mDatasSingle.get(i).ares=new RectF(x- mDMoneyRateW /2,measuredHeight-bounds.height()-months.size()*defaultUnitHeight,x+ mDMoneyRateW /2,measuredHeight-bounds.height());
        Log.e("mDatasSingle","ares:"+ mDatasSingle.get(i).ares);
    }
    canvas.drawPath(path,mPaintLine);

if (mTouch!=null){
canvas.drawLine(mTouch.pointX, measuredHeight - bounds.height()2,mTouch.pointX, measuredHeight - bounds.height()4-months.size()defaultUnitHeight,mPaintTouch);
canvas.drawCircle(mTouch.pointX,mTouch.pointY,Math.max(bounds.height(),bounds.width())/2,mPaintbg);
canvas.drawCircle(mTouch.pointX,mTouch.pointY,Math.max(bounds.height(),bounds.width())/2,mPaintTouch);
String day=""+new DecimalFormat("#00").format(mTouch.getDateDay());
canvas.drawText( day,mTouch.pointX-bounds.width()/3,mTouch.pointY+bounds.height()/2,mPaintText);
Path pathValue=new Path();
pathValue.moveTo(mTouch.pointX,measuredHeight - bounds.height()4-months.size()defaultUnitHeight);
float money = mTouch.getMoney();
Rect rectMonet = new Rect();
mPaintText.getTextBounds(money+"",0,(money+"").length(), rectMonet);
pathValue.lineTo(mTouch.pointX-rectMonet.width()/2,measuredHeight - bounds.height()4-months.size()defaultUnitHeight);
pathValue.quadTo(mTouch.pointX-rectMonet.width()1.0f,measuredHeight - bounds.height()4-months.size()defaultUnitHeight-rectMonet.height()
,mTouch.pointX-rectMonet.width()/2,measuredHeight - bounds.height()4-months.size()defaultUnitHeight-rectMonet.height()2);
pathValue.lineTo(mTouch.pointX+rectMonet.width()/2,measuredHeight - bounds.height()4-months.size()defaultUnitHeight-rectMonet.height()2);
pathValue.quadTo(mTouch.pointX+rectMonet.width()1.0f,measuredHeight - bounds.height()4-months.size()defaultUnitHeight-rectMonet.height()
,mTouch.pointX+rectMonet.width()/2,measuredHeight - bounds.height()4-months.size()defaultUnitHeight);
pathValue.lineTo(mTouch.pointX,measuredHeight - bounds.height()4-months.size()defaultUnitHeight);
canvas.drawPath(pathValue,mPaintTouch);
canvas.drawText(money+"",mTouch.pointX-rectMonet.width()/2,measuredHeight - bounds.height()4-months.size()*defaultUnitHeight-rectMonet.height()/2,mPaintText);
}

    canvas.restore();

}

@Override
public boolean onTouchEvent(MotionEvent event) {
    switch (event.getAction()){
        case MotionEvent.ACTION_DOWN:
        case MotionEvent.ACTION_MOVE:
            float x = event.getX();
            float y = event.getY();

            if (lastX==0||Math.abs(lastX-x)>mDMoneyRateW){
                Log.e("onTouchEvent","x:"+x);
                Log.e("onTouchEvent","y:"+y);
                for (Chart chart : mDatasSingle) {
                    boolean contains = chart.ares.contains(x, y);
                    if (contains){
                        mTouch=chart;
                        invalidate();
                        break;
                    }
                }
                lastX =x;
            }


            break;
        case MotionEvent.ACTION_UP:
            float xUp = event.getX();
            float yUp = event.getY();
            if (xUp>6*mDMoneyRateW&&xUp<mMeasuredWidth){
                for (Chart month : months) {
                    RectF monthAres = month.getMonthAres();
                    if (monthAres.contains(xUp,yUp)){
                        setChooseMonth(month.getDateMonth());
                    }
                }
            }
            break;
    }

    return true;
}

/**
 * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
 */
public  int dip2px(Context context, float dpValue) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (dpValue * scale + 0.5f);
}

public void setDatas(List<Chart> datas) {
    this.datas = datas;
    mDatasSingle.clear();
    for (Chart data : datas) {
        if (data.getDateMonth()==mChooseMonth)
            mDatasSingle.add(data);
    }
    invalidate();
}

public void setChooseMonth(int chooseMonth) {
    mChooseMonth = chooseMonth;
    mTouch=null;
    mDatasSingle.clear();
    for (Chart data : datas) {
        if (data.getDateMonth()==mChooseMonth)
            mDatasSingle.add(data);
    }
    invalidate();
}

}

</pre>

Demo地址;http://pan.baidu.com/s/1skKQxv3

最后编辑于：2017.12.07 23:46:12

人面猴
序言：七十年代末，一起剥皮案震惊了整个滨河市，随后出现的几起案子，更是在滨河造成了极大的恐慌，老刑警刘岩，带你破解...
沈念sama阅读 159,835评论 4赞 364
死咒
序言：滨河连续发生了三起死亡事件，死亡现场离奇诡异，居然都是意外死亡，警方通过查阅死者的电脑和手机，发现死者居然都...
沈念sama阅读 67,598评论 1赞 295
救了他两次的神仙让他今天三更去死
文/潘晓璐我一进店门，熙熙楼的掌柜王于贵愁眉苦脸地迎上来，“玉大人，你说我怎么就摊上这事。” “怎么了？”我有些...
开封第一讲书人阅读 109,569评论 0赞 244
道士缉凶录：失踪的卖姜人
文/不坏的土叔我叫张陵，是天一观的道长。经常有香客问我，道长，这世上最难降的妖魔是什么？我笑而不...
开封第一讲书人阅读 44,159评论 0赞 213
港岛之恋（遗憾婚礼）
正文为了忘掉前任，我火速办了婚礼，结果婚礼上，老公的妹妹穿的比我还像新娘。我一直安慰自己，他们只是感情好，可当我...
茶点故事阅读 52,533评论 3赞 287
恶毒庶女顶嫁案：这布局不是一般人想出来的
文/花漫我一把揭开白布。她就那样静静地躺着，像睡着了一般。火红的嫁衣衬着肌肤如雪。梳的纹丝不乱的头发上，一...
开封第一讲书人阅读 40,710评论 1赞 222
城市分裂传说
那天，我揣着相机与录音，去河边找鬼。笑死，一个胖子当着我的面吹牛，可吹牛的内容都是我干的。我是一名探鬼主播，决...
沈念sama阅读 31,923评论 2赞 313
双鸳鸯连环套：你想象不到人心有多黑
文/苍兰香墨我猛地睁开眼，长吁一口气：“原来是场噩梦啊……” “哼！你这毒妇竟也来了？” 一声冷哼从身侧响起，我...
开封第一讲书人阅读 30,674评论 0赞 203
万荣杀人案实录
序言：老挝万荣一对情侣失踪，失踪者是张志新（化名）和其女友刘颖，没想到半个月后，有当地人在树林里发现了一具尸体，经...
沈念sama阅读 34,421评论 1赞 246
护林员之死
正文独居荒郊野岭守林人离奇死亡，尸身上长有42处带血的脓包…… 初始之章·张勋以下内容为张勋视角年9月15日...
茶点故事阅读 30,622评论 2赞 245
白月光启示录
正文我和宋清朗相恋三年，在试婚纱的时候发现自己被绿了。大学时的朋友给我发了我未婚夫和他白月光在一起吃饭的照片。...
茶点故事阅读 32,115评论 1赞 260
活死人
序言：一个原本活蹦乱跳的男人离奇死亡，死状恐怖，灵堂内的尸体忽然破棺而出，到底是诈尸还是另有隐情，我是刑警宁泽，带...
沈念sama阅读 28,428评论 2赞 254
日本核电站爆炸内幕
正文年R本政府宣布，位于F岛的核电站，受9级特大地震影响，放射性物质发生泄漏。R本人自食恶果不足惜，却给世界环境...
茶点故事阅读 33,114评论 3赞 238
男人毒药：我在死后第九天来索命
文/蒙蒙一、第九天我趴在偏房一处隐蔽的房顶上张望。院中可真热闹，春花似锦、人声如沸。这庄子的主人今日做“春日...
开封第一讲书人阅读 26,097评论 0赞 8
一桩弑父案，背后竟有这般阴谋
文/苍兰香墨我抬头看了看天上的太阳。三九已至，却和暖如春，着一层夹袄步出监牢的瞬间，已是汗流浃背。一阵脚步声响...
开封第一讲书人阅读 26,875评论 0赞 197
情欲美人皮
我被黑心中介骗来泰国打工，没想到刚下飞机就差点儿被人妖公主榨干…… 1. 我叫王不留，地道东北人。一个月前我还...
沈念sama阅读 35,753评论 2赞 276
代替公主和亲
正文我出身青楼，却偏偏与公主长得像，于是被迫代替她去往敌国和亲。传闻我的和亲对象是个残疾皇子，可洞房花烛夜当晚...
茶点故事阅读 35,649评论 2赞 271

Android简单自定义折线图（自定义view实现）

推荐阅读更多精彩内容