Line Chart in Android

Create Project

Create new project in Android Studio with steps as below:

Step 1: Input Project Name and Select Project Location

Step 2: Select SDK for Android App

Step 3: Select Default Activity for App

Step 4: Finish create project

Add Strings

Open res\values\strings.xml file and add new string as below:

<resources>
    <string name="app_name">Learn Android with Real Apps</string>
    <string name="oil_price">Oil Price</string>
    <string name="price_in_last_12_days">Price in last 12 days</string>
</resources>

Add Library as Dependencies

Open build.gradle file in Gradle Scripts and add new library as below:

repositories {
    maven { url 'http://repo1.maven.org/maven2' }
    maven { url 'https://jitpack.io' }
}

dependencies {
    implementation 'com.github.PhilJay:MPAndroidChart:v3.0.3'
}

Main Activity Layout

Open res\layout\activity_main.xml file and create layout as below:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#ffffff"
    android:orientation="vertical"
    tools:ignore="HardcodedText" >

    <com.github.mikephil.charting.charts.LineChart
        android:id="@+id/lineChart"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>

Main Activity Class

Add code to MainActivity.java in android.demo.learnandroidwithrealapps package as below:

package android.demo.learnandroidwithrealapps;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import com.github.mikephil.charting.charts.LineChart;
import com.github.mikephil.charting.components.XAxis;
import com.github.mikephil.charting.components.YAxis;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.LineData;
import com.github.mikephil.charting.data.LineDataSet;

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

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        drawLineChart();
    }

    private void drawLineChart() {
        LineChart lineChart = findViewById(R.id.lineChart);
        List<Entry> lineEntries = getDataSet();
        LineDataSet lineDataSet = new LineDataSet(lineEntries, getString(R.string.oil_price));
        lineDataSet.setAxisDependency(YAxis.AxisDependency.LEFT);
        lineDataSet.setHighlightEnabled(true);
        lineDataSet.setLineWidth(2);
        lineDataSet.setColor(Color.RED);
        lineDataSet.setCircleColor(Color.YELLOW);
        lineDataSet.setCircleRadius(6);
        lineDataSet.setCircleHoleRadius(3);
        lineDataSet.setDrawHighlightIndicators(true);
        lineDataSet.setHighLightColor(Color.RED);
        lineDataSet.setValueTextSize(12);
        lineDataSet.setValueTextColor(Color.DKGRAY);

        LineData lineData = new LineData(lineDataSet);
        lineChart.getDescription().setText(getString(R.string.price_in_last_12_days));
        lineChart.getDescription().setTextSize(12);
        lineChart.setDrawMarkers(true);
        lineChart.getXAxis().setPosition(XAxis.XAxisPosition.BOTH_SIDED);
        lineChart.animateY(1000);
        lineChart.getXAxis().setGranularityEnabled(true);
        lineChart.getXAxis().setGranularity(1.0f);
        lineChart.getXAxis().setLabelCount(lineDataSet.getEntryCount());
        lineChart.setData(lineData);
    }

    private List<Entry> getDataSet() {
        List<Entry> lineEntries = new ArrayList<Entry>();
        lineEntries.add(new Entry(0, 1));
        lineEntries.add(new Entry(1, 2));
        lineEntries.add(new Entry(2, 3));
        lineEntries.add(new Entry(3, 4));
        lineEntries.add(new Entry(4, 2));
        lineEntries.add(new Entry(5, 3));
        lineEntries.add(new Entry(6, 1));
        lineEntries.add(new Entry(7, 5));
        lineEntries.add(new Entry(8, 7));
        lineEntries.add(new Entry(9, 6));
        lineEntries.add(new Entry(10, 4));
        lineEntries.add(new Entry(11, 5));
        return lineEntries;
    }

}

Structure of Project

Run App

Load Main Activity