배치

allprojects {
    repositories {
        maven { url "https://jitpack.io" }
    }
}

dependencies {
    〜中略〜

    compile 'com.github.PhilJay:MPAndroidChart:v3.0.3'
}

스크린

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.ssuzaki.piesample.MainActivity">

    <com.github.mikephil.charting.charts.PieChart
        android:id="@+id/pie"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="20dp"
        />

</android.support.constraint.ConstraintLayout>

코드

package com.example.ssuzaki.piesample

import android.graphics.Color
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import com.github.mikephil.charting.charts.PieChart
import com.github.mikephil.charting.components.Description
import com.github.mikephil.charting.components.Legend
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.ColorTemplate
import java.util.*

class MainActivity : AppCompatActivity() {

    var mPie: PieChart? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        setupPieChartView()
    }

    fun setupPieChartView() {
        mPie = findViewById(R.id.pie)

        mPie?.setUsePercentValues(true)

        val desc: Description = Description()
        desc.text = "PieChartのサンプルだよ"
        mPie?.description = desc

        val legend: Legend? = mPie?.legend
        legend?.horizontalAlignment = Legend.LegendHorizontalAlignment.LEFT

        /**
         * サンプルデータ
         */
        val value = Arrays.asList(10f, 20f, 30f, 40f)
        val label = Arrays.asList("A", "B", "C", "D")
        val entry = ArrayList<PieEntry>()
        for(i in value.indices) {
            entry.add( PieEntry(value.get(i), label.get(i)) )
        }

        /**
         * ラベル
         */
        val dataSet = PieDataSet(entry, "チャートのラベル")
        dataSet.colors = ColorTemplate.COLORFUL_COLORS.toList()
        dataSet.setDrawValues(true)

        val pieData = PieData(dataSet)
        pieData.setValueFormatter(PercentFormatter())
        pieData.setValueTextSize(20f)
        pieData.setValueTextColor(Color.WHITE)

        mPie?.data = pieData
    }
}

결과