Creating a Simple Donut Chart in Android

1) 

Please add below following repositories and dependencies code to your build.gradle( Module:app ) file and You don’t need to download manually the whole library because after adding below code it will automatically download and install the Mp Android Library into your project.

dependencies {

 compile 'com.github.PhilJay:MPAndroidChart:v2.2.4'

}

repositories {

 maven { url "https://jitpack.io" }

}

2) XML Code

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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="payprocess.charts.Main2Activity">

    <HorizontalScrollView

        android:layout_width="match_parent"

        android:layout_height="match_parent">

            <com.github.mikephil.charting.charts.PieChart

                android:id="@+id/piechart"

                android:layout_width="match_parent"

                android:layout_height="230dp" />

    </HorizontalScrollView>

</RelativeLayout> 

3) Java Code

public class MainActivity extends AppCompatActivity {

    PieChart mChart;

    private int[] yValues  = {21, 2, 2};

    private String[] xValues = {"Present Days", "Absents", "Leaves"};

    public static  final int[] MY_COLORS = {

            Color.rgb(84,124,101), Color.rgb(64,64,64), Color.rgb(153,19,0),

            Color.rgb(38,40,53), Color.rgb(215,60,55)

    };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

      

        mChart = (PieChart)findViewById(R.id.piechart);

        mChart.setDescription("");

        mChart.setRotationEnabled(true);

        mChart.setOnChartValueSelectedListener(new OnChartValueSelectedListener() {

            @Override

            public void onValueSelected(Entry e, int dataSetIndex, Highlight h) {

                // display msg when value selected

                if (e == null)

                    return;

                Toast.makeText(MainActivity.this,

                        xValues[e.getXIndex()] + " is " + e.getVal() + "", Toast.LENGTH_SHORT).show();

            }

            @Override

            public void onNothingSelected() {

            }

        });

        // setting sample Data for Pie Chart

        setDataForPieChart();

    }

    public void setDataForPieChart() {

        ArrayList<Entry> yVals1 = new ArrayList<Entry>();

        for (int i = 0; i < yValues.length; i++)

            yVals1.add(new Entry(yValues[i], i));

        ArrayList<String> xVals = new ArrayList<String>();

        for (int i = 0; i < xValues.length; i++)

            xVals.add(xValues[i]);

        // create pieDataSet

        PieDataSet dataSet = new PieDataSet(yVals1, "");

        dataSet.setSliceSpace(5f);

        dataSet.setSelectionShift(5);

        // adding colors

        ArrayList<Integer> colors = new ArrayList<Integer>();

        // Added My Own colors

        for (int c : MY_COLORS)

            colors.add(c);

        dataSet.setColors(colors);

        //  create pie data object and set xValues and yValues and set it to the pieChart

        PieData data = new PieData(xVals, dataSet);

        //   data.setValueFormatter(new DefaultValueFormatter());

        //   data.setValueFormatter(new PercentFormatter());

        data.setValueFormatter(new MainActivity.MyValueFormatter());

        data.setValueTextSize(11f);

        data.setValueTextColor(Color.WHITE);

        mChart.setData(data);

        // undo all highlights

        mChart.highlightValues(null);

        // refresh/update pie chart

        mChart.invalidate();

        // animate piechart

        mChart.animateXY(1400, 1400);

        // Legends to show on bottom of the graph

        Legend l = mChart.getLegend();

        l.setPosition(Legend.LegendPosition.BELOW_CHART_CENTER);

        l.setXEntrySpace(7);

        l.setYEntrySpace(5);

    }

    public class MyValueFormatter implements ValueFormatter {

        private DecimalFormat mFormat;

        public MyValueFormatter() {

            mFormat = new DecimalFormat("###,###,##0"); // use one decimal if needed

        }

        @Override

        public String getFormattedValue(float value, Entry entry, int dataSetIndex, ViewPortHandler viewPortHandler) {

            // write your logic here

            return mFormat.format(value) + ""; // e.g. append a dollar-sign

        }

    }

   

  

}