Step1: Add dependency MPAndroidChart and jitpack maven repository in your build.gradle

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

	dependencies{
	
		compile 'com.github.PhilJay:MPAndroidChart:v2.1.6'
	}

Step2: Adding com.github.mikephil.charting.charts.BarChart as a xml tag in a layout file, you can add different tags according to the kind of graph you need to implement Grouped Bar Chart, Horizontal Bar Chart, Simple Line Chart, Line Chart with Cubic Lines, Combined Line and Bar Chart, Pie Chart, Scatter Chart, Candlestick Chart and Radar Chart.

<com.github.mikephil.charting.charts.BarChart
       		android:id="@+id/chart2"
       		android:layout_width="match_parent"
       		android:layout_height="130dp"
       		android:layout_marginBottom="@dimen/ten_dp"
       		android:layout_marginLeft="@dimen/twenty_dp"
       		android:layout_marginRight="@dimen/twenty_dp"
       		android:layout_marginTop="@dimen/ten_dp" />

Step3: Initializing the BarChart into the activity onCreate() method

	barChart = (BarChart) view.findViewById(R.id.chart2);

Step4: Arraylist of verticle bars having BarEntries according to the different labels list \

// verticle bars height 
        ArrayList<BarEntry> entries = new ArrayList<>();
        entries.add(new BarEntry(4f, 0));
        entries.add(new BarEntry(8f, 1));
        entries.add(new BarEntry(6f, 2));
        entries.add(new BarEntry(12f, 3));
        entries.add(new BarEntry(18f, 4));
        entries.add(new BarEntry(9f, 5));
        entries.add(new BarEntry(11f, 6));
        
	// verticle bars according to different days 
        ArrayList<String> labels = new ArrayList<String>();
        labels.add("Mon");
        labels.add("Tues");
        labels.add("Wed");
        labels.add("Thurs");
        labels.add("Fri");
        labels.add("Sat");
        labels.add("Sun");

Step5:  Allowing enteries into the dataset and make it as a app theme color

BarDataSet dataset = new BarDataSet(entries, "Activities in a days");
        dataset.setColor(ContextCompat.getColor(getActivity(), R.color.colorPrimary));

Step6: Legend is a kind of indicator that is used to describe the different lables in a graph, we can set textcolor by getting barChart object

Legend legend = barChart.getLegend();
        legend.setTextColor(ContextCompat.getColor(getActivity(), R.color.white));

Step7: Adding graph x and y axis textcolor, axislinecolor according to the type of color we have to implement

// XAxis 
        XAxis xAxis = barChart.getXAxis();
        xAxis.setAvoidFirstLastClipping(true);
        xAxis.setTextColor(ContextCompat.getColor(getActivity(), R.color.white));
        
	// YAxis 
	YAxis yAxisLeft = barChart.getAxisLeft();
        yAxisLeft.setTextColor(ContextCompat.getColor(getActivity(), R.color.white));
        
	YAxis yAxisRight = barChart.getAxisRight();
        yAxisRight.setEnabled(true);
        yAxisRight.setAxisLineColor(ContextCompat.getColor(getActivity(), R.color.white));
        yAxisRight.setTextColor(ContextCompat.getColor(getActivity(), R.color.white));

Step8: Data object that represents all data for the BarChart, we can set set its description color, datavalue textcolor and its animation

BarData data = new BarData(labels, dataset);
        barChart.setDescriptionColor(ContextCompat.getColor(getActivity(), R.color.colorPrimary));
        barChart.setData(data);
        data.setValueTextColor(ContextCompat.getColor(getActivity(), R.color.white));
	// for y-axis animation
        barChart.animateY(5000);