Develop Reference

how to resizing X-label text size in MPandroidCharts

I'm using MPandroidCharts in android application to make a bar chart it data from NodeJs server my code works fine but I found that when I change nbs of data (number of articles "on XAxe" < 5) the label nb and size still the some ( max 5 elements) that make my graph Not understood, I need a solution plz
to understand my situation plz look at pictures:
My code:
ArrayList<BarEntry> entries = new ArrayList<>();
final ArrayList<String> months = new ArrayList<>();
Log.d("liste size ",product_List.size()+"");
for(int i=0; i<product_List.size();i++){
Log.d("get List nb ",product_List.get(i).getId());
Log.d("get List produit ",product_List.get(i).getProduit());
months.add(i,product_List.get(i).getProduit());
int nb = Integer.parseInt(product_List.get(i).getId());
entries.add(new BarEntry(i, nb));
}
BarDataSet barDataSet = new BarDataSet(entries, "Produits");
barDataSet.setBarBorderWidth(0.9f);
barDataSet.setColors(ColorTemplate.COLORFUL_COLORS);
BarData barData = new BarData(barDataSet);
XAxis xAxis = barChart.getXAxis();
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
IndexAxisValueFormatter formatter = new IndexAxisValueFormatter(months);
xAxis.setGranularity(1f);
xAxis.setValueFormatter(formatter);
barChart.setData(barData);
barChart.setFitBars(true);
barChart.animateY(5000);
barChart.invalidate();
One more thing, if I when to clear chart data and make others by a button which code I need to use.

How to remove the central white circle in a pie chart

I made a pie-chart in my Android app and I have a white cerce in the middlle I tried to remove it but I couldn't even the piechart.setCentralCirculaire doesn't work in my code. Is there any way that I can do that? Thanks.
pieChart=(PieChart)findViewById(R.id.Piechart);
pieChart.setRotationEnabled(true);
addDataSet();
private void addDataSet(){
Log.d(TAG, "addDataSet: ");
ArrayList<PieEntry> yEntrys=new ArrayList<>();
yEntrys.add(new PieEntry(15.0f, "LOW"));
yEntrys.add(new PieEntry(50.0f,"Normal"));
yEntrys.add(new PieEntry(25.0f,"hyper"));
PieDataSet pieDataSet= new PieDataSet(yEntrys,"Employee Global Activity");
pieDataSet.setSliceSpace(2);
pieDataSet.setValueTextSize(12);
ArrayList<Integer> colors =new ArrayList<>();
colors.add(Color.RED);
colors.add(Color.BLUE);
colors.add(Color.GREEN);
pieDataSet.setColors(colors);
PieData pieData =new PieData(pieDataSet);
pieChart.setData(pieData);
pieChart.invalidate();
}

piechart.setDrawHoleEnabled(false);

If i understand right this is a MPAndroidChart, so you uses.
piechart.setHoleRadius(0.0f);

How to add real time data in Barchart using MPAndroidChart library

I am using MPAndroid Chart library to draw BarChart.
But not getting how to draw bars with real time data in on button click.
Can anyone please help me in this.
Thanks.

After getting data store that in List(graphData). Then,
BarChart barChart;
/*List to store real time data*/
private List<Integer> graphData = new ArrayList<>();
/*List of String which contains X-axis values */
ArrayList<String> xAxisValuesList = new ArrayList<>();
// create BarEntry for group
ArrayList<BarEntry> group = new ArrayList<>();
for (int i = 0; i < graphData.size(); i++) {
Log.d(TAG, "generating for:" + graphData.get(i));
group.add(new BarEntry(graphData.get(i), i));
}
// creating dataset for group
BarDataSet barDataSet = new BarDataSet(group, "Label");
// combined all dataset into an arraylist
ArrayList<BarDataSet> dataSets = new ArrayList<>();
dataSets.add(barDataSet);
// initialize the Bardata with argument labels and dataSet
BarData barData = new BarData(xAxisValuesList, dataSets);
barChart.setData(barData);

how to show data by pieces in BarChart Android

I have a problem with BarChart.. I have a 7 item on list. For example
final int[] a = {5,2,10,4,7,8,13};
final String[] b= {"January","February","March","April","May","June","Jully"};
So I want to show by pieces on Barchart. For example first 5 items show and when I click the button than 2 items remaining show in Barchart. Images is,
Than I want when I click the "WAFAW" button barchart is,
But my code working is,
So it means dont show the bar..How can I do that? Thanks for now..
My Code is,
final BarChart barChart = (BarChart) findViewById(R.id.chart);
Button button = (Button) findViewById(R.id.button);
final int[] a = {5,2,10,4,7,8,13};
final String[] b= {"January","February","March","April","May","June","Jully"};
final ArrayList<BarEntry> entries = new ArrayList<>();
final ArrayList<String> labels = new ArrayList<String>();
for(int i=0 ; i<5;i++){
entries.add(new BarEntry(a[i],i));
labels.add(b[i]);
}
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
entries.clear();
labels.clear();
for(int i=5; i<a.length;i++){
entries.add(new BarEntry(a[i],i));
labels.add(b[i]);
}
BarDataSet dataset = new BarDataSet(entries, "# of Calls");
barChart.getXAxis().setPosition(XAxis.XAxisPosition.TOP);
BarData data = new BarData(labels, dataset);
dataset.setColors(ColorTemplate.COLORFUL_COLORS);
barChart.setData(data);
barChart.animateY(3000);
}
});
BarDataSet dataset = new BarDataSet(entries, "# of Calls");
barChart.getXAxis().setPosition(XAxis.XAxisPosition.TOP);
BarData data = new BarData(labels, dataset);
dataset.setColors(ColorTemplate.COLORFUL_COLORS);
barChart.setData(data);
barChart.animateY(3000);

As far as I know there is no simple solution on how to select which bars to display. It depends on how dynamically you want/need to solve it.
The best solution I can think of would be keeing an array of bars to show like:
final int[] show_arr = {0,1,2,3,4,5};
and when onClick() is called you change the array to
final int[] show_arr = {5,7};
and then you run through the whole plotting routine again.
But you add the entries with looping through show_arr
I know this is not a super nice solution, but at least you only have to code the vector hard and can reuse all the other parts.

You can use below code for the same :
https://github.com/blackfizz/EazeGraph
https://github.com/HackPlan/AndroidCharts

MP Piechart data entry counts

I created a Piechart with MPandroidchart for my app. The chart works great. The problem is that the original data contains 4 data entry but the chart only show 3. Can somebody help? What is the limitation for this?

My PieChart
Hi Thank you so much for getting me back. The xVals and yVals are from SQLite database. xVals{30-,30-45,46-60,60-} String and yVals(6,14,13,3) float.
My codes are posted here:
private void AddDataCYNewCustomersAge(){
DataBaseHelper databasehelper = new DataBaseHelper (NewCustomerReportCurrentYear.this);
PieChart ageChart = new PieChart(this);
ageChart = (PieChart)findViewById(R.id.agechart);
//get yVals and datasets of marriage chart
ArrayList<Entry> yValsageCounts = new ArrayList<Entry>();
for(int i = 0;i < databasehelper.yDataIncomeCounts().size(); i++)
yValsageCounts.add(new Entry(databasehelper.yDataAgeCounts().get(i), i));
//get xVals of marriage chart
ArrayList<String> xValsage = new ArrayList<String>();
for(int i = 0;i < databasehelper.xDataAge().size();i++)
xValsage.add(databasehelper.xDataAge().get(i));
PieDataSet ageCounts = new PieDataSet(yValsageCounts, "");
//set yvals attribute
ageCounts.setSliceSpace(3);
ageCounts.setSelectionShift(5);
//add many colors
ageCounts.setColors(new int[]{R.color.Fuchsia, R.color.Aqua,R.color.Yellow,R.color.LightSeaGreen,R.color.Blue}, this);
// configue pie chart
ageChart.setUsePercentValues(true);
ageChart.setRotationEnabled(true);
ageChart.setRotationAngle(0);
ageChart.setDescriptionPosition(350, 550);
ageChart.setDrawHoleEnabled(true);
ageChart.setHoleColor(Color.TRANSPARENT);
ageChart.setHoleRadius(13);
ageChart.setTransparentCircleRadius(18);
ageChart.getLegend().setPosition(Legend.LegendPosition.RIGHT_OF_CHART);
//ageChart.getLegend().setXEntrySpace(3);
// ageChart.getLegend().setYEntrySpace(3);
ageChart.getLegend().setTextColor(Color.BLUE);
ageChart.setDescription("Income");
ageChart.setDescriptionTextSize(13);
ageChart.setDescriptionColor(Color.BLUE);
//get income chart data
PieData ageData = new PieData(xValsage,ageCounts);
ageData.setValueFormatter(new PercentFormatter());
ageData.setValueTextSize(11);
ageData.setValueTextColor(Color.BLUE);
ageChart.setData(ageData);
//refresh data
ageChart.invalidate();
}