自定义View -- 柱状图 我也来自定义个柱状图来玩玩
遇到要用到图的时候总是再找第三方开源，但有时这个图非常简单，用第三方开源来用的话有点得不偿失，所以我就自己撸了个柱状图出来
当然你如果觉得需求很复杂，那么你可以去使用这些开源
还有的自己查https://github.com/search?l=Java&o=desc&q=charts&s=stars&type=Repositories&utf8=%E2%9C%93
先看效果图：
一张不过瘾来，再来一张大的复用的试试来 （下边的图片不是卡哈，因为上面的是按33fps录的下面的图片用的是10fps录的所以看起来有点卡一样）
是不是很爽
来看看代码
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PathEffect;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View; import java.util.ArrayList;
import java.util.List; /**
* @date 创建时间 2018/3/11
* @author mdm
* @Description 自定义柱状图
* @Version 1.0
*/
public class BarGraphView extends View { private float itemWidth = 310;
private float itemHeight = 310; private float barWidth; //默认柱子的宽度
private float barHeight; //柱子的高度
private float cellHeigh = 1; //按照list的最大值算出的1点的height
private float widthSpace; //默认柱子的间距
private float viewMargin = 20; //整个view的外边距 private float textHeight; //显示文字高度 private Paint colorBarPaint; //柱状图画笔
private Paint textPaint; //文字画笔 private RectF barRectf; private List<BarGraphInfo> mList; //共有多少个柱状图
private int barCount; private float startX;
private float startY; //不同分辨率的比例 这个好像没用上
private float scaleWidth = 1;
private float scaleHeight = 1; private float maxBarHeight;//最大的柱状图高度 //最小的柱子的高度
private float minBarHeight = 99999; private int defualtColor = Color.parseColor("#ffffff"); //默认白色 public BarGraphView(Context context) {
this(context,null);
}
public BarGraphView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs); //获取不同屏幕的比例大小 这后来想想取比例没什么意义
DisplayMetrics dm = getResources().getDisplayMetrics();
int width = dm.widthPixels;
int height = dm.heightPixels;
scaleWidth = width / 1920;
scaleHeight = height / 1080;
init();
}
public BarGraphView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
this(context, attrs);
} private void init() {
//初始化画笔
colorBarPaint = new Paint();
colorBarPaint.setAntiAlias(true);
//设置矩形
barRectf = new RectF(); textPaint = new Paint(); //根据各个手机分辨率不同算出margin的间距大小
viewMargin = scaleWidth>scaleHeight? scaleWidth * viewMargin: scaleHeight*viewMargin;
} @Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec); int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int widthMode = MeasureSpec.getMode(widthMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec); if(widthMode == MeasureSpec.EXACTLY){
itemWidth = widthSize - (2 * viewMargin); //减去外边距
startX = viewMargin; //起始位置定位到默认的
} if(heightMode == MeasureSpec.EXACTLY){
itemHeight = heightSize - (2 * viewMargin);
startY = viewMargin;
}
} @Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom); Log.i("tag","itemWidth" + itemWidth); Log.i("tag","getMeasuredWidth()" + getMeasuredWidth()); //默认初始化数据
mList = new ArrayList<>();
{
mList.add(new BarGraphInfo(Color.DKGRAY,"小鸡",200));
mList.add(new BarGraphInfo(Color.YELLOW,"66",100));
mList.add(new BarGraphInfo(Color.GRAY,"what",50));
mList.add(new BarGraphInfo(Color.BLUE,"99",80));
mList.add(new BarGraphInfo(Color.RED,"什么鬼？",90));
// mList.add(new BarGraphInfo(Color.LTGRAY,"哈哈",150));
// mList.add(new BarGraphInfo(Color.CYAN,"西西",110));
// mList.add(new BarGraphInfo(Color.MAGENTA,"东欧",250));
// mList.add(new BarGraphInfo(Color.DKGRAY,"how",90));
// mList.add(new BarGraphInfo(Color.BLACK,"why",300));
} Log.i("tag","viewMargin" + viewMargin);
setList(mList);
} private int totalTime = 100;
private int currentTime = 0; //当前已绘制的次数
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas); currentTime++;
float left = startX + widthSpace;
//画矩形
for (int i = 0;i < barCount;i++){
//计算出高度
barHeight = cellHeigh * mList.get(i).num; barHeight = barHeight/totalTime*currentTime; //设置颜色
colorBarPaint.setColor(mList.get(i).color);
barRectf = new RectF(); float barLeft = left + i * barWidth;
float top = (startY + textHeight + maxBarHeight) - barHeight;
float right = left + (i + 1) * barWidth;
float bottom = startY + textHeight + maxBarHeight; barRectf.set(barLeft,top,right,bottom);
canvas.drawRect(barRectf,colorBarPaint); //画subTitle
RectF textRectF = new RectF();
float subTitleLeft = left + i * barWidth;
float subTitleTop = startY + textHeight + maxBarHeight;
float subTitleRight = left + (i + 1) * barWidth;
float subTitleBottom = startY + textHeight + maxBarHeight + textHeight;
textRectF.set(subTitleLeft,subTitleTop,subTitleRight,subTitleBottom);
drawText(canvas,textRectF,mList.get(i).subTitle,mList.get(i).color); //画num
RectF numRectF = new RectF();
float numLeft = left + i * barWidth;
float numTop = (startY + textHeight + maxBarHeight) - barHeight - textHeight;
float numRight = left + (i + 1) * barWidth;
float numBottom = (startY + textHeight + maxBarHeight) - barHeight;
numRectF.set(numLeft,numTop,numRight,numBottom);
drawText(canvas,numRectF,String.valueOf(mList.get(i).num),mList.get(i).color); left += barWidth;
} float lineY = (startY + textHeight + maxBarHeight - (minBarHeight/totalTime * currentTime));
Paint paint = new Paint();
paint.setStyle(Paint.Style.STROKE);
paint.setColor(Color.DKGRAY);
Path path = new Path();
path.moveTo(startX + 5 , lineY);
path.lineTo(itemWidth + widthSpace,lineY);
PathEffect effects = new DashPathEffect(new float[]{15,15},2);
paint.setPathEffect(effects);
canvas.drawPath(path,paint); if(currentTime < totalTime){
postInvalidate();
}
} //画文字居中
private void drawText(Canvas canvas,RectF rectF,String text,int color){
if(color == 0) {
textPaint.setColor(Color.BLACK);
}else{
textPaint.setColor(color);
}
textPaint.setTextSize(15);
textPaint.setAntiAlias(true);
textPaint.setStyle(Paint.Style.FILL);
//该方法即为设置基线上那个点究竟是left,center,还是right 这里我设置为center
textPaint.setTextAlign(Paint.Align.CENTER); Paint.FontMetrics fontMetrics = textPaint.getFontMetrics();
float top = fontMetrics.top;//为基线到字体上边框的距离,即上图中的top
float bottom = fontMetrics.bottom;//为基线到字体下边框的距离,即上图中的bottom
int baseLineY = (int) (rectF.centerY() - top/2 - bottom/2);//基线中间点的y轴计算公式
canvas.drawText(text,rectF.centerX(),baseLineY,textPaint);
} class BarGraphInfo{
private int color;
private String subTitle;
private float num; public BarGraphInfo(int color,String subTitle,float num){
this.color = color;
this.subTitle = subTitle;
this.num = num;
}
} /**
* 设置数据源
* @param list
*/
public void setList(List<BarGraphInfo> list){ if(list == null && list.size() <= 0){
return;
}
mList = list;
barCount = list.size();//多少个柱状图 float avgWidth = itemWidth / barCount;
barWidth = avgWidth / 2; //获取状图的宽度
widthSpace = avgWidth / 4; //获取间隙 float maxNum = 0;
float minNum = list.get(0).num;
for (BarGraphInfo info : mList){
//获取最大值
if(info.num > maxNum){
maxNum = info.num;
}
if(info.num < minNum){
minNum = info.num;
}
}
//获取柱状图最大显示区域 平分高度10份，6份用来显示最大柱状图，2份高度用来显示下面的文字,2份用来显示柱状图上面的文字
maxBarHeight = (itemHeight/10)*8;
textHeight = (itemHeight/10) * 1; //文字高度 cellHeigh = maxBarHeight/maxNum; //平均每num = 1 时的高度 minBarHeight = cellHeigh * minNum; //最小柱状图的高度
postInvalidate();
}
直接复制就可以用，就处理下BarGraphInfo ,就可以了，是不是很简单。
注意注意：由于需求变动，我又改成了多层柱状图的形式废话不多说看效果图
还可以吧，来继续放代码
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.Handler;
import android.support.annotation.Nullable;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View; import java.util.ArrayList;
import java.util.List; /**
* @date 创建时间 2018/3/11
* @author mdm
* @Description 多层叠加柱状图
* @Version 1.0
*/
public class MtulLayerBarGraphView extends View { private boolean isLoadNewData = false;
private float itemWidth = 310;
private float itemHeight = 310; private float barWidth = 20; //默认柱子的宽度
private float barHeight = 50; //柱子的高度
private float cellHeigh = 1; //按照list的最大值算出的1点的height
private float widthSpace = 10; //默认柱子的间距
private float viewMargin = 20; //整个view的外边距 private float textHeight; //显示文字高度 private Paint colorBarPaint; //柱状图画笔
private TextPaint textPaint; //文字画笔 //柱状图的柱形矩形
private RectF barRectf; private List<List<BarGraphInfo>> mList;
private List<List<BarGraphInfo>> mDefaultList; //共有多少个柱状图
private int barCount; private float startX;
private float startY; private float maxBarHeight;//最大的柱状图高度 //数据中最小的柱子的高度 ，用来判断虚线显示位置的
private float minBarHeight = 99999; //不同分辨率的比例外边框相对默认比例
private float scaleMargin = 1;
// private float scaleBarWidth = 1;
//默认在这个标准下的宽度和高度图形的字符和其他正常
private int defualtWidth = 480;
private int defualtHeight = 440;
// private int defualtBarWidth = 44; //柱状图个默认44宽 public MtulLayerBarGraphView(Context context) {
this(context,null);
}
public MtulLayerBarGraphView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs); //获取不同屏幕的比例大小
// DisplayMetrics dm = getResources().getDisplayMetrics();
// int width = dm.widthPixels;
// int height = dm.heightPixels;
// scaleWidth = width / 1920;
// scaleHeight = height / 1080;
init();
}
public MtulLayerBarGraphView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
this(context, attrs);
} private void init() {
//初始化画笔
colorBarPaint = new Paint();
colorBarPaint.setAntiAlias(true);
//设置矩形
barRectf = new RectF(); textPaint = new TextPaint(); //默认初始化数据
mDefaultList = new ArrayList<>(); List<BarGraphInfo> listOne = new ArrayList<>();
listOne.add(new BarGraphInfo(Color.DKGRAY,"主布A",100));
listOne.add(new BarGraphInfo(Color.YELLOW,"主布A",200));
List<BarGraphInfo> listTwo = new ArrayList<>();
listTwo.add(new BarGraphInfo(Color.DKGRAY,"主布C",200));
listTwo.add(new BarGraphInfo(Color.YELLOW,"主布D",400));
List<BarGraphInfo> listThree = new ArrayList<>();
listThree.add(new BarGraphInfo(Color.DKGRAY,"主布E",300));
listThree.add(new BarGraphInfo(Color.YELLOW,"主布F",100));
List<BarGraphInfo> listFour = new ArrayList<>();
listFour.add(new BarGraphInfo(Color.DKGRAY,"主布G",200));
listFour.add(new BarGraphInfo(Color.YELLOW,"主布H",100)); mDefaultList.add(listOne);
mDefaultList.add(listTwo);
mDefaultList.add(listThree);
mDefaultList.add(listFour);
} @Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec); int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int widthMode = MeasureSpec.getMode(widthMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec); // if(widthMode == MeasureSpec.EXACTLY){
//
// scaleMargin = ((widthSize/defualtWidth)+(heightSize/defualtHeight))/2;
//
// //根据各个手机分辨率不同算出margin的间距大小
// viewMargin = scaleMargin * viewMargin;
// if(viewMargin == 0){
// viewMargin = 20;
// startY = 20;
// }
// itemWidth = widthSize - (2 * viewMargin); //减去外边距
// startX = viewMargin; //起始位置定位到默认的
// }
//
// if(heightMode == MeasureSpec.EXACTLY){
// //根据各个手机分辨率不同算出margin的间距大小
// viewMargin = scaleMargin * viewMargin;
// if(viewMargin == 0){
// viewMargin = 20;
// startX = 20;
// }
// itemHeight = heightSize - (2 * viewMargin);
// }
} @Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom); //
scaleMargin = ((getMeasuredWidth()/defualtWidth)+(getMeasuredHeight()/defualtHeight))/2; //根据各个手机分辨率不同算出margin的间距大小
viewMargin = scaleMargin * viewMargin; itemWidth = getMeasuredWidth() - (2 * viewMargin); //减去外边距
startX = viewMargin; //起始位置定位到默认的 itemHeight = getMeasuredHeight() - (2 * viewMargin);
startY = viewMargin; Log.i("tag","itemWidth = " + itemWidth);
Log.i("tag","itemHeight = " + itemHeight);
Log.i("tag","viewMargin = " + viewMargin);
Log.i("tag","onLayout()");
if(!isLoadNewData) {
isLoadNewData = true;
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
setList(mDefaultList);
}
},3000); } } private int totalTime = 50; //总绘制次数，用来控制绘制速度
private int currentTime = 0; //当前已绘制的次数
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas); currentTime++;
float left = startX + widthSpace;
//画矩形
for (int i = 0;i < barCount;i++){ List<BarGraphInfo> list = mList.get(i);
float itemHeightSum = 0;
for(int j = 0; j < list.size();j++){
//计算出高度
barHeight = cellHeigh * list.get(j).num;
barHeight = barHeight/totalTime*currentTime; itemHeightSum += barHeight; //设置颜色
colorBarPaint.setColor(list.get(j).color);
barRectf = new RectF(); float barLeft = left + i * barWidth;
float top = (startY + textHeight + maxBarHeight) - itemHeightSum;
float right = left + (i + 1) * barWidth;
float bottom = startY + textHeight + maxBarHeight - (itemHeightSum - barHeight) ;
barRectf.set(barLeft,top,right,bottom);
canvas.drawRect(barRectf,colorBarPaint); //画num
// RectF numRectF = new RectF();
// float numLeft = left + i * barWidth;
// float numTop = (startY + textHeight + maxBarHeight) - barHeight - textHeight;
// float numRight = left + (i + 1) * barWidth;
// float numBottom = (startY + textHeight + maxBarHeight) - barHeight;
// numRectF.set(numLeft,numTop,numRight,numBottom);
drawText(canvas,barRectf,String.valueOf(list.get(j).num == 0? 0 : list.get(j).num),Color.RED,false);
} //画subTitle
RectF textRectF = new RectF();
float subTitleLeft = left + i * barWidth;
float subTitleTop = startY + textHeight + maxBarHeight;
float subTitleRight = left + (i + 1) * barWidth;
float subTitleBottom = startY + textHeight + maxBarHeight + textHeight;
textRectF.set(subTitleLeft,subTitleTop,subTitleRight,subTitleBottom);
drawText(canvas,textRectF,"配套总览",list!= null && list.size()>0?list.get(0).color:Color.DKGRAY,true); // //画num
// RectF numRectF = new RectF();
// float numLeft = left + i * barWidth;
// float numTop = (startY + textHeight + maxBarHeight) - barHeight - textHeight;
// float numRight = left + (i + 1) * barWidth;
// float numBottom = (startY + textHeight + maxBarHeight) - barHeight;
// numRectF.set(numLeft,numTop,numRight,numBottom);
// drawText(canvas,numRectF,String.valueOf(mList.get(i).num == 0? 0 : mList.get(i).num),mList.get(i).color,false); left += barWidth;
} //用来刷新数据的
if (currentTime < totalTime) {
postInvalidate();
}
} //画文字居中
private void drawText(Canvas canvas,RectF rectF,String text,int color,boolean isTitle){
if(color == 0) {
textPaint.setColor(Color.BLACK);
}else{
textPaint.setColor(color);
}
float textSize = barWidth/44 * 18 > 23 ? 23 : 18 * (barWidth / 44);
textSize = textSize < 15 ? 15 : textSize;
textPaint.setTextSize(textSize);
textPaint.setAntiAlias(true);
textPaint.setStyle(Paint.Style.FILL);
//该方法即为设置基线上那个点究竟是left,center,还是right 这里我设置为center
textPaint.setTextAlign(Paint.Align.CENTER); Paint.FontMetrics fontMetrics = textPaint.getFontMetrics();
float top = fontMetrics.top;//为基线到字体上边框的距离,即上图中的top
float bottom = fontMetrics.bottom;//为基线到字体下边框的距离,即上图中的bottom
int baseLineY = (int) (rectF.centerY() - top/2 - bottom/2);//基线中间点的y轴计算公式 if(isTitle) {
//换行 拆开换行
int group = (int) (4 * (barWidth / 44));
if (text.length() > group) {
int count = text.length() % group >= 1 ? text.length() / group + 1 : text.length() / group;
for (int i = 0; i < count; i++) {
if ((i + 1) * group < text.length()) {
canvas.drawText(text.substring(i * group, (i + 1) * group), rectF.centerX(), baseLineY + (i * rectF.height() / 2), textPaint);
} else {
canvas.drawText(text.substring(i * group, text.length()), rectF.centerX(), baseLineY + (i * rectF.height() / 2), textPaint);
}
}
} else {
canvas.drawText(text, rectF.centerX(), baseLineY, textPaint);
}
}else{
canvas.drawText(text, rectF.centerX(), baseLineY, textPaint);
}
} public static class BarGraphInfo{
private int color;
private String subTitle;
private float num;
private String keyInfo; //记录关键信息 public BarGraphInfo(){} public BarGraphInfo(int color,String subTitle,float num){
this.color = color;
this.subTitle = subTitle;
this.num = num;
} public BarGraphInfo(int color,String subTitle,float num,String keyInfo){
this.color = color;
this.subTitle = subTitle;
this.num = num;
this.keyInfo = keyInfo;
} public String getKeyInfo(){
return keyInfo;
}
} /**
* 设置数据源
* @param list
*/
public void setList(List<List<BarGraphInfo>> list){
setList(list,0);
} /**
* 设置数据源
* @param list 数据源
* @param maxNum 设置默认最大数据值
*/
public void setList(List<List<BarGraphInfo>> list,float maxNum){ currentTime = 0;
if(list == null || list.size() <= 0){
mList = mDefaultList;
}else{
mList = list;
}
barCount = mList.size();//多少个柱状图 float avgWidth = itemWidth / barCount;
barWidth = avgWidth / 2; //获取状图的宽度
widthSpace = avgWidth / 4; //获取间隙 for(List<BarGraphInfo> subList : list){
int subSum = 0;
for(BarGraphInfo info : subList){
subSum += info.num;
}
if(subSum > maxNum){
maxNum = subSum;
}
}
if(maxNum == 0){
maxNum = 100;
}
//获取柱状图最大显示区域 平分高度10份，6份用来显示最大柱状图，2份高度用来显示下面的文字,2份用来显示柱状图上面的文字
maxBarHeight = (itemHeight/10) * maxBarHeightWt;
textHeight = (itemHeight/10) * textHeightWt; //文字RectF高度
cellHeigh = maxBarHeight/maxNum; //平均每num = 1 时的高度
postInvalidate();
}
//最大柱状图的比重 高度相对于控件总高度的比重
private int maxBarHeightWt = 8;
//文字高度相对于控件总高度的比重
private int textHeightWt = 1;
}
复制就可以了，简单吧
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