MPchart 饼状图的简单封装与使用。
作者：互联网
Android中实现常规的图标，就绕不过MPAndroidChart这个强大的开源库。
秉着不重复造轮子（偷懒+水平有限）的原则，在项目中引入了这个强大的图表库，并对其中饼状图的实现做了简单的封装。
package com.bjttsf.sale.widget;
import android.content.Context;
import android.graphics.Color;
import android.text.SpannableString;
import com.bjttsf.sale.R;
import com.bjttsf.sale.bean.LegendBean;
import com.blankj.utilcode.util.ConvertUtils;
import com.github.mikephil.charting.charts.PieChart;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.components.YAxis;
import com.github.mikephil.charting.data.PieData;
import com.github.mikephil.charting.data.PieDataSet;
import com.github.mikephil.charting.data.PieEntry;
import com.github.mikephil.charting.formatter.PercentFormatter;
import com.github.mikephil.charting.utils.MPPointF;
import java.util.ArrayList;
import java.util.List;
/**
*
*/
public class MpChartFacts {
//必填属性
private Context mContext;
private PieChart mPieChart;
private List<Float> mFloatList;
private CharSequence text;
//可选属性
//是否空心
private boolean holeEnabled = true;
//内圆百分比
private float inRadius = 90f;
//外圆百分比
private float outRadius = 100f;
//饼状图间隙
private float sliceSpace = 0f;
//是否显示方块标签
private boolean isLegend = false;
//是否在圆环上显示信息
private boolean isText = true;
//方块标签的位置设置信息
private LegendBean mLegendBean = null;
//顺时针圆环颜色
List<Integer> colorList;
//内部空心颜色
private int holeColor;
//内部空心字体颜色
private int holeTextColor;
//自定义饼状图每一项的数据
private ArrayList<PieEntry> mPieEntries;
public static class Builder {
//必填属性
private Context mContext;
private PieChart mPieChart;
private List<Float> mFloatList;
private CharSequence text;
//可选属性
public Builder(Context context, PieChart pieChart, List<Float> floatList, CharSequence text) {
mContext = context;
mPieChart = pieChart;
mFloatList = floatList;
this.text = text;
colorList.clear();
colorList.add(mContext.getResources().getColor(R.color.ye_FFD449));
colorList.add(mContext.getResources().getColor(R.color.green_50D78A));
colorList.add(mContext.getResources().getColor(R.color.blue_24A3FF));
holeColor = mContext.getResources().getColor(R.color.white);
holeTextColor = mContext.getResources().getColor(R.color.black_2B2B2B);
}
//是否空心
private boolean holeEnabled = true;
//内圆百分比
private float inRadius = 90f;
//外圆百分比
private float outRadius = 100f;
//饼状图间隙
private float sliceSpace = 0f;
//是否显示方块标签
private boolean isLegend = false;
//是否在圆环上显示信息
private boolean isText = true;
//方块标签的位置设置信息
private LegendBean mLegendBean = null;
//顺时针圆环颜色
private List<Integer> colorList = new ArrayList<>();
//内部空心颜色
private int holeColor;
//内部空心字体颜色
private int holeTextColor;
//自定义饼状图每一项的数据
private ArrayList<PieEntry> mPieEntries;
public Builder pieEntries(ArrayList<PieEntry> pieEntries) {
this.mPieEntries = pieEntries;
return this;
}
public Builder holeTextColor(int holeTextColor) {
this.holeTextColor = holeTextColor;
return this;
}
public Builder holeColor(int holeColor) {
this.holeColor = holeColor;
return this;
}
public Builder colorList(List<Integer> colorList) {
this.colorList = colorList;
return this;
}
public Builder holeEnabled(boolean holeEnabled) {
this.holeEnabled = holeEnabled;
return this;
}
public Builder inRadius(float inRadius) {
this.inRadius = inRadius;
return this;
}
public Builder outRadius(float outRadius) {
this.outRadius = outRadius;
return this;
}
public Builder sliceSpace(float sliceSpace) {
this.sliceSpace = sliceSpace;
return this;
}
public Builder isLegend(boolean isLegend) {
this.isLegend = isLegend;
return this;
}
public Builder mLegendBean(LegendBean mLegendBean) {
this.mLegendBean = mLegendBean;
return this;
}
public Builder isText(Boolean isText) {
this.isText = isText;
return this;
}
public MpChartFacts build() {
return new MpChartFacts(this);
}
}
private MpChartFacts(Builder builder) {
mContext = builder.mContext;
mPieChart = builder.mPieChart;
mFloatList = builder.mFloatList;
text = builder.text;
holeEnabled = builder.holeEnabled;
inRadius = builder.inRadius;
outRadius = builder.outRadius;
sliceSpace = builder.sliceSpace;
isLegend = builder.isLegend;
mLegendBean = builder.mLegendBean;
isText = builder.isText;
colorList = builder.colorList;
holeColor = builder.holeColor;
holeTextColor = builder.holeTextColor;
mPieEntries = builder.mPieEntries;
}
public void setPieChart() {
//如果启用此选项，则图表中的值将以百分比形式绘制，而不是以原始值绘制
mPieChart.setUsePercentValues(true);
//如果这个组件应该启用（应该被绘制）FALSE如果没有。如果禁用，此组件的任何内容将被绘制默认
mPieChart.getDescription().setEnabled(false);
//图表外围偏移量设定
// mPieChart.setExtraOffsets(5, 5, 5, 5);
//较高的值表明速度会缓慢下降 例如如果它设置为0，它会立即停止。1是一个无效的值，并将自动转换为0.999f。
mPieChart.setDragDecelerationFrictionCoef(1f);
//mPieChart.setCenterTextTypeface(tfLight);
//是否空心
mPieChart.setDrawHoleEnabled(holeEnabled);
if (holeEnabled) {
//空心内部颜色
mPieChart.setHoleColor(holeColor);
//完全透明
mPieChart.setTransparentCircleAlpha(0);
//设置内圆占总体的百分比，默认为50%
mPieChart.setHoleRadius(inRadius);
//设置外圆占总体的百分比，默认为55%
mPieChart.setTransparentCircleRadius(outRadius);
}
//是否绘制中心文字
mPieChart.setDrawCenterText(true);
//中间字体
mPieChart.setCenterText(generateCenterSpannableText(text));
//中部字体偏移量
mPieChart.setCenterTextOffset(0, 0);
mPieChart.setCenterTextSizePixels(ConvertUtils.sp2px(14));
//中间字体颜色
mPieChart.setCenterTextColor(holeTextColor);
//设置绘制的起始角度 默认顶部顺时针绘制（270f）
// mPieChart.setRotationAngle(0);
//是否有触摸反馈
mPieChart.setRotationEnabled(false);
//点击是否展示被点击部分
mPieChart.setHighlightPerTapEnabled(true);
// mPieChart.setUnit(" €");
// mPieChart.setDrawUnitsInmPieChart(true);
// add a selection listener
// mPieChart.setOnChartValueSelectedListener(this);
//设置动画效果
// mPieChart.animateY(1400, Easing.EaseInQuad);
// mPieChart.spin(2000, 0, 360);
//设置
Legend l = mPieChart.getLegend();
if (isLegend) {
l.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.CENTER);
l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
if (mLegendBean != null) {
l.setDrawInside(mLegendBean.isInside());
l.setXEntrySpace(mLegendBean.getXEntrySpace());
l.setYEntrySpace(mLegendBean.getYEntrySpace());
l.setYOffset(mLegendBean.getYOffset());
}
//是否显示方块标签
l.setEnabled(true);
} else {
l.setEnabled(false);
}
// entry label styling
//显示自定义标签内容
mPieChart.setDrawEntryLabels(isText);
mPieChart.setEntryLabelColor(Color.WHITE);
//设置自定义标签字体大小
mPieChart.setEntryLabelTextSize(14);
ArrayList<PieEntry> entries = new ArrayList<>();
if (mPieEntries == null) {
PieEntry pieEntry1 = new PieEntry(mFloatList.get(0), "已完成");
PieEntry pieEntry2 = new PieEntry(mFloatList.get(1), "未完成");
PieEntry pieEntry3 = null;
if (mFloatList.size() > 2) {
pieEntry3 = new PieEntry(mFloatList.get(2), "未完成");
}
entries.add(pieEntry1);
entries.add(pieEntry2);
if (pieEntry3 != null) {
entries.add(pieEntry3);
}
} else {
Float num = 0f;
for (int i = 0; i < mFloatList.size(); i++) {
num = num + mFloatList.get(i);
}
if (num == 0f) {
//无数据的默认展示
PieEntry pieEntry = new PieEntry(1f, "无数据");
colorList.set(0,mContext.getResources().getColor(R.color.grey_999999));
entries.add(pieEntry);
} else {
entries = mPieEntries;
}
}
//"" 为方块标签的描述
PieDataSet dataSet = new PieDataSet(entries, "");
////设置Y轴，这个数据集应该被绘制（左或右）。默认值：左
dataSet.setAxisDependency(YAxis.AxisDependency.LEFT);
//是否有空白间隙
dataSet.setAutomaticallyDisableSliceSpacing(false);
//是否在圆环上显示百分比数值
dataSet.setDrawValues(isText);
dataSet.setColors(colorList);
dataSet.setDrawIcons(false);
//设置百分比之间 间隙大小
dataSet.setSliceSpace(sliceSpace);
dataSet.setIconsOffset(new MPPointF(0, 40));
//设置被点击后 伸出去的距离 （需要开启点击事件）
dataSet.setSelectionShift(3f);
PieData data = new PieData(dataSet);
data.setValueFormatter(new PercentFormatter(mPieChart));
//设置百分比的大小
data.setValueTextSize(13);
data.setValueTextColor(Color.WHITE);
/* Typeface tfLight = Typeface.create("6666",Typeface.NORMAL);
data.setValueTypeface(tfLight);*/
mPieChart.setData(data);
// undo all highlights
mPieChart.highlightValues(null);
mPieChart.invalidate();
}
//设置空心圆内部字体内容
private SpannableString generateCenterSpannableText(CharSequence text) {
SpannableString s = new SpannableString(text);
// s.setSpan(new RelativeSizeSpan(2f), 3, s.length() - 5, 0);
/*s.setSpan(new StyleSpan(Typeface.NORMAL), 2, 4, 0);
s.setSpan(new ForegroundColorSpan(Color.GRAY), 4, s.length() - 4, 0);
s.setSpan(new RelativeSizeSpan(.8f), 2, 4, 0);
s.setSpan(new StyleSpan(Typeface.ITALIC), s.length() - 4, s.length(), 0);
s.setSpan(new ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length() - 4, s.length(), 0);
*/
return s;
}
}
使用了工厂模式来处理各种可配置的属性。实现颜色和对应数值的灵活展示。
标签：封装,builder,private,MPchart,mPieChart,import,new,public,状图 来源： https://blog.csdn.net/Mryoung2015/article/details/101066549