为了在手机端显示项目管理系统中的质量报表，以及成本分布的报表，我们引入了 MPAndroidChart

开源地址：https://github.com/PhilJay/MPAndroidChart

implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0'

布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/page_bg"
    android:orientation="vertical">
    <com.github.mikephil.charting.charts.PieChart
        android:id="@+id/chart"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerHorizontal="true" />
</LinearLayout>

2.java代码

package com.butterflypm.app.report;

import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import com.butterflypm.app.R;
import com.butterflypm.app.base.ISSFragment;
import com.butterflypm.helper.ViewHelper;
import com.github.mikephil.charting.animation.Easing;
import com.github.mikephil.charting.charts.PieChart;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.data.Entry;
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.highlight.Highlight;
import com.github.mikephil.charting.listener.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.ColorTemplate;

import java.util.ArrayList;
import java.util.List;

public class BugPieFragment extends ISSFragment {
    private PieChart pieChart;
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);
        View view = LayoutInflater.from(getFromActivity()).inflate(R.layout.bugpie, container, false);
        pieChart=view.findViewById(R.id.chart);
        setupPieChart();
        loadPieChartData();

        pieChart.setOnChartValueSelectedListener(new OnChartValueSelectedListener() {
            @Override
            public void onValueSelected(Entry e, Highlight h) {
                Log.e("@@@@----->",e.toString());
            }

            @Override
            public void onNothingSelected() {

            }
        });


        return view;
    }

    private void setupPieChart() {
        pieChart.setDrawHoleEnabled(true);
        pieChart.setUsePercentValues(true);
        pieChart.setEntryLabelTextSize(12);
        pieChart.setEntryLabelColor(Color.BLACK);
        pieChart.setCenterText("Spending by Category");
        pieChart.setCenterTextSize(24);
        pieChart.getDescription().setEnabled(false);

        Legend l = pieChart.getLegend();
        l.setVerticalAlignment(Legend.LegendVerticalAlignment.TOP);
        l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.RIGHT);
        l.setOrientation(Legend.LegendOrientation.VERTICAL);
        l.setDrawInside(false);
        l.setEnabled(true);
    }

    private void loadPieChartData() {
        ArrayList<PieEntry> entries = new ArrayList<>();
        entries.add(new PieEntry(0.2f, "Food & Dining"));
        entries.add(new PieEntry(0.15f, "Medical"));
        entries.add(new PieEntry(0.10f, "Entertainment"));
        entries.add(new PieEntry(0.25f, "Electricity and Gas"));
        entries.add(new PieEntry(0.3f, "Housing"));

        ArrayList<Integer> colors = new ArrayList<>();
        for (int color: ColorTemplate.MATERIAL_COLORS) {
            colors.add(color);
        }

        for (int color: ColorTemplate.VORDIPLOM_COLORS) {
            colors.add(color);
        }

        PieDataSet dataSet = new PieDataSet(entries, "Expense Category");
        dataSet.setColors(colors);

        PieData data = new PieData(dataSet);
        data.setDrawValues(true);
        data.setValueFormatter(new PercentFormatter(pieChart));
        data.setValueTextSize(12f);
        data.setValueTextColor(Color.BLACK);

        pieChart.setData(data);
        pieChart.invalidate();

        pieChart.animateY(1400, Easing.EaseInOutQuad);
    }

}