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PhilJayPhilJay
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Work on new example with multicolor barchart
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‎MPChartExample/AndroidManifest.xml‎

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@@ -61,6 +61,7 @@
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<activity android:name="ScrollViewActivity"></activity>
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<activity android:name="StackedBarActivityNegative"></activity>
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<activity android:name=".realm.RealmWikiExample"></activity>
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<activity android:name=".BarChartPositiveNegative"></activity>
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</application>
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</manifest>

‎MPChartExample/src/com/xxmassdeveloper/mpchartexample/BarChartPositiveNegative.java‎

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package com.xxmassdeveloper.mpchartexample;
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import android.graphics.Color;
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import android.graphics.Typeface;
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import android.os.Bundle;
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import android.view.WindowManager;
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import com.github.mikephil.charting.charts.BarChart;
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import com.github.mikephil.charting.components.Legend;
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import com.github.mikephil.charting.components.Legend.LegendForm;
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import com.github.mikephil.charting.components.Legend.LegendPosition;
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import com.github.mikephil.charting.components.XAxis;
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import com.github.mikephil.charting.components.XAxis.XAxisPosition;
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import com.github.mikephil.charting.components.YAxis;
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import com.github.mikephil.charting.data.BarData;
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import com.github.mikephil.charting.data.BarDataSet;
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import com.github.mikephil.charting.data.BarEntry;
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import com.github.mikephil.charting.data.Entry;
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import com.github.mikephil.charting.formatter.ValueFormatter;
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import com.github.mikephil.charting.interfaces.datasets.IBarDataSet;
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import com.github.mikephil.charting.utils.ViewPortHandler;
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import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;
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import java.text.DecimalFormat;
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import java.util.ArrayList;
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import java.util.List;
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public class BarChartPositiveNegative extends DemoBase {
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protected BarChart mChart;
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private Typeface mTf;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
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WindowManager.LayoutParams.FLAG_FULLSCREEN);
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setContentView(R.layout.activity_barchart_noseekbar);
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mTf = Typeface.createFromAsset(getAssets(), "OpenSans-Regular.ttf");
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mChart = (BarChart) findViewById(R.id.chart1);
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mChart.setExtraTopOffset(-30f);
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mChart.setExtraBottomOffset(10f);
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mChart.setDrawBarShadow(false);
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mChart.setDrawValueAboveBar(true);
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mChart.setDescription("");
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// scaling can now only be done on x- and y-axis separately
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mChart.setPinchZoom(false);
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mChart.setDrawGridBackground(false);
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XAxis xAxis = mChart.getXAxis();
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xAxis.setPosition(XAxisPosition.BOTTOM);
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xAxis.setTypeface(mTf);
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xAxis.setDrawGridLines(false);
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xAxis.setDrawAxisLine(false);
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xAxis.setSpaceBetweenLabels(2);
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xAxis.setTextColor(Color.LTGRAY);
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xAxis.setTextSize(12f);
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YAxis left = mChart.getAxisLeft();
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left.setDrawLabels(false);
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left.setStartAtZero(false);
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left.setSpaceTop(25f);
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left.setSpaceBottom(25f);
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left.setDrawAxisLine(false);
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left.setDrawGridLines(false);
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mChart.getAxisRight().setEnabled(false);
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mChart.getLegend().setEnabled(false);
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// THIS IS THE ORIGINAL DATA YOU WANT TO PLOT
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List<Data> data = new ArrayList<>();
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data.add(new Data(0, -224.1f, "12-29"));
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data.add(new Data(1, 238.5f, "12-30"));
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data.add(new Data(2, 1280.1f, "12-31"));
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data.add(new Data(3, -442.3f, "01-01"));
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data.add(new Data(4, -2280.1f, "01-02"));
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setData(data);
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}
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private void setData(List<Data> dataList) {
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ArrayList<BarEntry> positiveValues = new ArrayList<BarEntry>();
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ArrayList<BarEntry> negativeValues = new ArrayList<BarEntry>();
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String[] dates = new String[dataList.size()];
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for (int i = 0; i < dataList.size(); i++) {
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Data d = dataList.get(i);
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BarEntry entry = new BarEntry(d.yValue, d.xIndex);
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if (d.yValue >= 0)
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positiveValues.add(entry);
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else
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negativeValues.add(entry);
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dates[i] = dataList.get(i).xAxisValue;
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}
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int green = Color.rgb(110, 190, 102);
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int red = Color.rgb(211, 74, 88);
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BarDataSet positive = new BarDataSet(positiveValues, "Positive");
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positive.setBarSpacePercent(35f);
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positive.setColor(red);
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positive.setValueTextColor(red);
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BarDataSet negative = new BarDataSet(negativeValues, "Negative");
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negative.setBarSpacePercent(35f);
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negative.setColor(green);
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negative.setValueTextColor(green);
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ArrayList<IBarDataSet> dataSets = new ArrayList<IBarDataSet>();
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dataSets.add(positive);
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dataSets.add(negative);
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BarData data = new BarData(dates, dataSets);
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data.setValueTextSize(12f);
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data.setValueTypeface(mTf);
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data.setValueFormatter(new ValueFormatter());
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mChart.setData(data);
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mChart.invalidate();
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}
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/**
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* Demo class representing data.
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*/
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private class Data {
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public String xAxisValue;
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public float yValue;
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public int xIndex;
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public Data(int xIndex, float yValue, String xAxisValue) {
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this.xAxisValue = xAxisValue;
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this.yValue = yValue;
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this.xIndex = xIndex;
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}
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}
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private class ValueFormatter implements com.github.mikephil.charting.formatter.ValueFormatter {
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private DecimalFormat mFormat;
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public ValueFormatter() {
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mFormat = new DecimalFormat("######.0");
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}
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@Override
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public String getFormattedValue(float value, Entry entry, int dataSetIndex, ViewPortHandler viewPortHandler) {
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return mFormat.format(value);
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}
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}
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}

‎MPChartExample/src/com/xxmassdeveloper/mpchartexample/notimportant/MainActivity.java‎

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import com.xxmassdeveloper.mpchartexample.BarChartActivity;
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import com.xxmassdeveloper.mpchartexample.BarChartActivityMultiDataset;
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import com.xxmassdeveloper.mpchartexample.BarChartActivitySinus;
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import com.xxmassdeveloper.mpchartexample.BarChartPositiveNegative;
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import com.xxmassdeveloper.mpchartexample.BubbleChartActivity;
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import com.xxmassdeveloper.mpchartexample.CandleStickChartActivity;
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import com.xxmassdeveloper.mpchartexample.CombinedChartActivity;
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objects.add(new ContentItem(
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"Chart in ScrollView",
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"This demonstrates how to use a chart inside a ScrollView."));
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objects.add(new ContentItem(
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"BarChart positive / negative",
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"This demonstrates how to create a BarChart with positive and negative values in different colors."));
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ContentItem realm = new ContentItem(
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"Realm.io Database",
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startActivity(i);
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break;
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case 26:
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i = new Intent(this, BarChartPositiveNegative.class);
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startActivity(i);
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break;
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case 27:
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i = new Intent(this, RealmMainActivity.class);
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startActivity(i);
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break;

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