Develop Reference

How to remove blurriness around pie chart when using custom colors?

I'm using MPAndroidchart pie chart and used my own colors for charts. Now the problem is the pie chart is blurred. Its edges are in blur. I want to remove the blur and make it sharp edges.How to do it?
I don't have 10 reputations to post image.
https://drive.google.com/open?id=1umms-1LZj0XuuKuDpOWZqcpRCOn6rh-X
Here is the code for chart displaying.
private void showChart(BudgetResponse.Budgets[] items) {
chart.setVisibility(View.VISIBLE);
chart.setUsePercentValues(true);
chart.getDescription().setEnabled(false);
chart.setExtraOffsets(5, 10, 5, 5);
chart.setDragDecelerationFrictionCoef(0.95f);
//chart.setCenterTextTypeface(tfLight);
//chart.setCenterText(generateCenterSpannableText());
chart.setDrawHoleEnabled(true);
chart.setHoleColor(Color.TRANSPARENT);
chart.setTransparentCircleColor(Color.WHITE);
chart.setTransparentCircleAlpha(110);
chart.setHoleRadius(58f);
chart.setTransparentCircleRadius(61f);
chart.setDrawCenterText(true);
SimpleSpanBuilder sb=new SimpleSpanBuilder();
sb.append("Total budget",new RelativeSizeSpan(1.0f));
float budget=0;
try{
for (int i=0;i<items.length;i++){
budget+=Float.parseFloat(items[i].getCurrentAmount());
}
}catch (Exception e){
e.printStackTrace();
}
sb.append("\n"+budget,new RelativeSizeSpan(2.0f),
new ForegroundColorSpan(activity.getResources().getColor(R.color.colorPrimary)));
chart.setCenterText(sb.build());
chart.setCenterTextColor(activity.getResources().getColor(R.color.titleColor));
chart.setCenterTextSizePixels(12f);
chart.setRotationAngle(0);
// enable rotation of the chart by touch
chart.setRotationEnabled(false);
chart.setHighlightPerTapEnabled(true);
chart.animateY(1400, Easing.EaseInOutQuad);
chart.getLegend().setEnabled(false);
ArrayList<PieEntry> entries = new ArrayList<>();
ArrayList<Integer> pieColors=new ArrayList<>();
for (BudgetResponse.Budgets budgets:items){
entries.add(new PieEntry(Float.parseFloat(budgets.getCurrentAmount()), budgets.getCategoryGroupName()));
if(budgets.getCategoryGroupName().contains("Bills")){
pieColors.add(getAppColor(R.color.lightViolet));
}else if(budgets.getCategoryGroupName().contains("Entertainment")){
pieColors.add(getAppColor(R.color.lightPink));
}else if(budgets.getCategoryGroupName().contains("Food")){
pieColors.add(getAppColor(R.color.lightBlue));
}else if(budgets.getCategoryGroupName().contains("Auto")){
pieColors.add(getAppColor(R.color.darkViolet));
}else if(budgets.getCategoryGroupName().contains("Shopping")){
pieColors.add(getAppColor(R.color.lightOrangeVariant));
}else if(budgets.getCategoryGroupName().contains("Transfers")){
pieColors.add(getAppColor(R.color.lightGreenVariant));
}
}
// add a lot of colors
ArrayList<Integer> colors = new ArrayList<>(pieColors);
PieDataSet dataSet = new PieDataSet(entries, "Budget Spends");
dataSet.setDrawIcons(false);
dataSet.setSliceSpace(3f);
dataSet.setIconsOffset(new MPPointF(0, 40));
dataSet.setSelectionShift(1f);
colors.add(ColorTemplate.getHoloBlue());
dataSet.setColors(colors);
//dataSet.setSelectionShift(0f);
PieData data = new PieData(dataSet);
data.setValueFormatter(new PercentFormatter(chart));
data.setValueTextSize(11f);
data.setValueTextColor(Color.TRANSPARENT);
//data.setValueTypeface(tfLight);
chart.setData(data);
//to remove labels over pie chart
chart.setDrawEntryLabels(false);
//to remove percentage over pie chart
chart.setUsePercentValues(false);
//chart.setDrawCenterText(false);
// undo all highlights
chart.highlightValues(null);
MyMarkerView mv = new MyMarkerView(activity, R.layout.custom_marker_view);
mv.setChartView(chart); // For bounds control
chart.setMarker(mv); //
chart.invalidate();
}
I want to remove blurriness around chart.
In activity the donut chat looks great. But in viewpager it looks blur.

BarChart with MPAndroidChart : bars are invisible

I am using MPAndroidChart to generate a simple bar chart, inside a collapsing toolbar. When I add entries, the value of the entry is visible at the correct height on the chart, but I can't see the bar.
This is how I create my variables:
final List<BarEntry> barEntries = new ArrayList<>();
final BarDataSet barDataSet = new BarDataSet(barEntries, getResources().getString(R.string.cycles_profiled));
final BarData barData = new BarData(barDataSet);
This is how I populate the data and refresh the chart:
final Calendar cal = getFirstDayOfWeek();
for (int i = 0; i < NUMBER_OF_DAYS; i++) {
long date = cal.getTimeInMillis();
barEntries.add(new BarEntry(date, map.get(date)));
cal.add(Calendar.DAY_OF_WEEK, 1);
}
barDataSet.setValues(barEntries);
barChart.setData(barData);
barData.notifyDataChanged();
barChart.notifyDataSetChanged();
barChart.invalidate();
I have no problem creating bar charts in other parts of my app. When I draw linecharts inside the collapsing toolbar, it also works fine.

Had the same issue, solved it thanks to OumaSyuu.
For some reason the BarChart has a difficulty with milliseconds.. convert your milliseconds to minutes: TimeUnit.MILLISECONDS.toMinutes(millisecondValue) and your life will be honey!
If converting to minutes doesn't help try to a different (higher) time unit. The time unit that will be good for you is the average gap between the bars, for me it was hours.
Another interesting point that may help you style the chart - In the method setBarWidth(float mBarWidth), the input mBarWidth represent values not pixels.

i was facing the same issue when i used timestamp for X axis values which was reported as a bug in the library, so i came out with the following solution
first create an arraylist:
ArrayList<String> xAxis_stringArray = new ArrayList<>();
and then while you add the entries to the entry list, set the x value to be the index of the data source (string value) and add the string value to the string array like that:
jsonObject = results.getJSONObject(index);
String s = jsonObject.getString(x);
xAxis_stringArray.add(s);
entries.add(new Entry(Float.valueOf(index), Float.valueOf(jsonObject.getString(y))));
and finally refer the xAxis to the value formatter class:
XAxis xAxis = sum_chart.getXAxis();
xAxis.setValueFormatter(new TimeAxisValueFormatter(xAxis_stringArray));
TimeAxisValueFormatter class:
public class TimeAxisValueFormatter implements IAxisValueFormatter {
ArrayList<String> arrayList = new ArrayList<>();
public TimeAxisValueFormatter(ArrayList<String> list) {
this.arrayList = list;
}
#Override
public String getFormattedValue(float value, AxisBase axis) {
return arrayList.get(Math.round(value));
}}

You are missing to set .setColor
Try with
barDataSet.setColor(Color.rgb(0, 155, 0)); //Put your RGB Color

I had the same problem just now, for me increasing the barwidth solved the problem. I think the problem lays with how spread out your data is which impacts the width of the lines. If you have a dataset that is only spread out over an hour and has entry for every minute of that hour, I think this problem won't exist. But if you are like me and have sparse data over 5 hours or so, then the barwidth just become smaller and smaller to accommodate all those entries and the bar just disappears.
Example:
data.setBarWidth(2f);
When I increased the barwidth to 80f:
data.setBarWidth(80f);

How to set colors in MPAndroidChart?

I'm using MPChartlib for a basic "Barchart" (3 bars and values between 0 and 100).
the background of the app is dark so I'd like to put the text in white but when I set the text with color code "FFFFFF" in chart_color stored in string.xml but the text appear in dark blue.
//Axe X
XAxis x = barchart.getXAxis();
x.setPosition(XAxisPosition.BOTTOM);
x.setTextColor(R.color.chart_color);
x.setAxisLineColor(R.color.chart_color);
// Design
barchart.setDragEnabled(false);
barchart.setDrawGridBackground(false);
barchart.setTouchEnabled(false);
barchart.setHighlightEnabled(false);
barchart.setMaxVisibleValueCount(101);
barchart.setDescription(null);
barchart.setGridBackgroundColor(R.color.chart_color);
barchart.invalidate(); // refresh
//Axe Y
barchart.getAxisLeft().setAxisMaxValue(100);
barchart.getAxisLeft().setDrawTopYLabelEntry(true);
barchart.getAxisLeft().setDrawAxisLine(false);
barchart.getAxisLeft().setDrawGridLines(false);
barchart.getAxisLeft().setAxisLineColor(R.color.chart_color);
barchart.getAxisLeft().setTextColor(R.color.chart_color);
barchart.getAxisRight().setAxisMaxValue(100);
barchart.getAxisRight().setDrawTopYLabelEntry(true);
barchart.getAxisRight().setAxisLineColor(R.color.chart_color);
barchart.getAxisRight().setTextColor(R.color.chart_color);
I tried lots of things and research but couldn't find the issue, does the lib doesn't use the same kind of color code or something ?
Thanks for your help,
Alex

You are passing the resource id to the library, not the actual color.
Use this to get the color:
int color = ContextCompat.getColor(context, R.color.chart_color);
LineDataSet dataSet = ...;
dataSet.setColor(color);
You can also find this in the documentation.

if you want change bars color prefer pass context as well like example below
ArrayList<BarEntry> entries = new ArrayList<>();
entries.add(new BarEntry(87f, 0));
entries.add(new BarEntry(90f, 1));
ArrayList<String> labels = new ArrayList<>();
labels.add("title 1");
labels.add("title 2);
BarDataSet dataSet = new BarDataSet(entries, "# of Calls ");
BarData barData = new BarData(labels, dataSet);
dataSet.setColors(new int[]{R.color.color1 , R.color.color2} , context);
barChart.setData(barData);
barChart.animateY(3000 , Easing.EasingOption.EaseOutBack );

How to hide legends and axis in MPAndroidChart?

Is their any possibility to hide all rounded items from this picture.
I have used the following code,
public void setDataList(List<HorizontalBarChartData> dataList, Resources resources) {
ArrayList<String> categories = new ArrayList<String>();
ArrayList<BarEntry> values = new ArrayList<BarEntry>();
ArrayList<BarDataSet> dataSets = new ArrayList<BarDataSet>();
BarDataSet set1;
for (int i = 0; i < dataList.size(); i++) {
categories.add(dataList.get(i).getName());
values.add(new BarEntry(dataList.get(i).getValue(), i));
}
/*set1 = new BarDataSet(values, "Income, Expense, Disposable Income");*/
set1 = new BarDataSet(values, "Category 1, Category 2, Category 3");
set1.setBarSpacePercent(35f);
set1.setColors(new int[]{resources.getColor(R.color.cyan_blue), resources.getColor(R.color.vermilion_tint), resources.getColor(R.color.sea_green)});
dataSets.add(set1);
BarData data = new BarData(categories, dataSets);
data.setValueTextSize(10f);
horizontalBarChart.setData(data);
}
Update
How to hide rounded part from this image?

Yes, is possible, just using following code:
mChart.setDescription(""); // Hide the description
mChart.getAxisLeft().setDrawLabels(false);
mChart.getAxisRight().setDrawLabels(false);
mChart.getXAxis().setDrawLabels(false);
mChart.getLegend().setEnabled(false); // Hide the legend

As per this answer
mChart.getXAxis().setDrawLabels(false); will hide the entire X-Axis(as required for this question).
For positioning the X-Axis, following code works.
XAxis xAxis = mChart.getXAxis();
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
Position can be set to
BOTTOM
BOTH_SIDED
BOTTOM_INSIDE
TOP
TOP_INSIDE
This helps if you are trying to hide only the particular side axis instead of hiding the entire axis.

It appears mChart.setDescription() no longer accepts a String.
The method now accepts an instance of the Description Class like this:
mChart.setDescription(Description description)
So to modify or delete the Chart Description you may do it like below
Description description = new Description();
description.setText("");
mChart.setDescription(description);

Following code work for all chart
Legend l = mchart.getLegend();
l.setEnabled(false);.

To hide description, use this
mChart.getDescription().setEnabled(false)

Below code works for PieChart. Try to get same method for your Chart.
Legend l = mChart.getLegend();
l.setPosition(LegendPosition.NONE);

chart=(LineChart) findViewById(R.id.Chart);
chart.getLegend().setEnabled(false); // for hiding square on below graph

Kotlin solution for MPAndroidChart:v3.1.0
chart.description.isEnabled = false // hide the description
chart.legend.isEnabled = false // hide the legend
chart.xAxis.setDrawLabels(false) // hide bottom label
chart.axisLeft.setDrawLabels(false) // hide left label
chart.axisRight.setDrawLabels(false) // hide right label

I had the problem, that the bottom xAxis Labels are cutted off when I used mChart.getLegend().setEnabled(false)
Now I use chart.getLegend().setForm(Legend.LegendForm.NONE); instead and the labels are not cutted of anymore

MPAndoirdChart Piechart how not to show bottom labels?

How not to show the highlighted bottom labels in pie chart?
And how to change entries text color?

You can do that by setting the setDrawLegend property to false.
Wherever you initialize your pieChart just add the following line:
pieChart.setDrawLegend(false);
[EDIT]
About changing the colors this is what you can do:
First of all this is happening when you add some data to your chart. When you add the data you add a PieData object to the chart. This PieData object takes 2 arguments, the names, and the values. The list of names is an ArrayList of Strings, but the values need to be an instance of a PieDataSet object. This is where you can add the colors and add other properties as well(such as the spacing between slices). Also, the PieDataSet object wraps up the Y values of a set and the label for this. And finally the PieDataSet's values are an ArrayList of Entry objects. One single Entry object takes the value to be shown, and it's index on the chart.
Here is a sample DEMO code that illustrates the above short description:
ArrayList<Entry> yChartValues = new ArrayList<Entry>();
int[] chartColorsArray = new int[] {
R.color.clr1,
R.color.clr2,
R.color.clr3,
R.color.clr4,
R.color.clr5
};
// These are the 2 important elements to be passed to the chart
ArrayList<String> chartNames = new ArrayList<String>();
PieDataSet chartValues = new PieDataSet(yChartValues, "");
for (int i = 0; i < 5; i++) {
yChartValues.add(new Entry((float) i*2, i));
chartNames.add(String.valueOf(i));
}
chartValues.setSliceSpace(1f); // Optionally you can set the space between the slices
chartValues.setColors(ColorTemplate.createColors(this, chartColorsArray)); // This is where you set the colors. The first parameter is the Context, use "this" if you're on an Activity or "getActivity()" if you're on a fragment
// And finally add all these to the chart
pieChart.setData(new PieData(chartNames, chartValues));
Does this help?
Edit 2:
This is how you change the color of the text inside the pie-slices:
PieChart pieChart = ...;
// way 1, simply change the color:
pieChart.setValueTextColor(int color);
// way 2, acquire the whole paint object and do whatever you want
Paint p = pieChart.getPaint(Chart.PAINT_VALUES);
p.setColor(yourcolor);
I know this is not an ideal solution, but it should work for now.