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

package com.xxmassdeveloper.mpchartexample;

import android.graphics.Typeface;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.WindowManager;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

import com.github.mikephil.charting.charts.PieChart;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.PieData;
import com.github.mikephil.charting.data.PieDataSet;
import com.github.mikephil.charting.interfaces.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.ColorTemplate;
import com.github.mikephil.charting.utils.Highlight;
import com.github.mikephil.charting.utils.Legend;
import com.github.mikephil.charting.utils.Legend.LegendPosition;
import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;

import java.util.ArrayList;

public class PieChartActivity extends DemoBase implements OnSeekBarChangeListener,
        OnChartValueSelectedListener {

    private PieChart mChart;
    private SeekBar mSeekBarX, mSeekBarY;
    private TextView tvX, tvY;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_piechart);

        tvX = (TextView) findViewById(R.id.tvXMax);
        tvY = (TextView) findViewById(R.id.tvYMax);

        mSeekBarX = (SeekBar) findViewById(R.id.seekBar1);
        mSeekBarY = (SeekBar) findViewById(R.id.seekBar2);

        mSeekBarX.setOnSeekBarChangeListener(this);
        mSeekBarY.setOnSeekBarChangeListener(this);

        mChart = (PieChart) findViewById(R.id.chart1);

        Typeface tf = Typeface.createFromAsset(getAssets(), "OpenSans-Regular.ttf");

        mChart.setValueTypeface(tf);
        mChart.setCenterTextTypeface(Typeface.createFromAsset(getAssets(), "OpenSans-Light.ttf"));

        mChart.setHoleRadius(60f);

        mChart.setDescription("");

        mChart.setDrawYValues(true);
        mChart.setDrawCenterText(true);

        mChart.setDrawHoleEnabled(true);
        
        mChart.setRotationAngle(0);

        // draws the corresponding description value into the slice
        mChart.setDrawXValues(true);

        // enable rotation of the chart by touch
        mChart.setRotationEnabled(true);
        
        // display percentage values
        mChart.setUsePercentValues(true);
        // mChart.setUnit(" €");
        // mChart.setDrawUnitsInChart(true);

        // add a selection listener
        mChart.setOnChartValueSelectedListener(this);
//        mChart.setTouchEnabled(false);
        
        mSeekBarX.setProgress(3);
        mSeekBarY.setProgress(100);
        
        mChart.animateXY(1500, 1500);

        Legend l = mChart.getLegend();
        l.setPosition(LegendPosition.RIGHT_OF_CHART);
        l.setXEntrySpace(7f);
        l.setYEntrySpace(5f);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.pie, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {
            case R.id.actionToggleValues: {
                if (mChart.isDrawYValuesEnabled())
                    mChart.setDrawYValues(false);
                else
                    mChart.setDrawYValues(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionTogglePercent: {
                if (mChart.isUsePercentValuesEnabled())
                    mChart.setUsePercentValues(false);
                else
                    mChart.setUsePercentValues(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleHole: {
                if (mChart.isDrawHoleEnabled())
                    mChart.setDrawHoleEnabled(false);
                else
                    mChart.setDrawHoleEnabled(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionDrawCenter: {
                if (mChart.isDrawCenterTextEnabled())
                    mChart.setDrawCenterText(false);
                else
                    mChart.setDrawCenterText(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionToggleXVals: {
                if (mChart.isDrawXValuesEnabled())
                    mChart.setDrawXValues(false);
                else
                    mChart.setDrawXValues(true);
                mChart.invalidate();
                break;
            }
            case R.id.actionSave: {
                // mChart.saveToGallery("title"+System.currentTimeMillis());
                mChart.saveToPath("title" + System.currentTimeMillis(), "");
                break;
            }
            case R.id.animateX: {
                mChart.animateX(1800);
                break;
            }
            case R.id.animateY: {
                mChart.animateY(1800);
                break;
            }
            case R.id.animateXY: {
                mChart.animateXY(1800, 1800);
                break;
            }
        }
        return true;
    }

    private String[] mParties = new String[] {
            "Party A", "Party B", "Party C", "Party D", "Party E"
    };

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

        tvX.setText("" + (mSeekBarX.getProgress() + 1));
        tvY.setText("" + (mSeekBarY.getProgress()));

        float mult = (float) mSeekBarY.getProgress();

        ArrayList<Entry> yVals1 = new ArrayList<Entry>();
        // ArrayList<Entry> yVals2 = new ArrayList<Entry>();

        // IMPORTANT: In a PieChart, no values (Entry) should have the same
        // xIndex (even if from different DataSets), since no values can be
        // drawn above each other.
        for (int i = 0; i < mSeekBarX.getProgress() + 1; i++) {
            yVals1.add(new Entry((float) (Math.random() * mult) + mult / 5, i));
        }

        // for (int i = mSeekBarX.getProgress() / 2; i <
        // mSeekBarX.getProgress(); i++) {
        // yVals2.add(new Entry((float) (Math.random() * mult) + mult / 5, i));
        // }

        ArrayList<String> xVals = new ArrayList<String>();

        for (int i = 0; i < mSeekBarX.getProgress() + 1; i++)
            xVals.add(mParties[i % mParties.length]);

        PieDataSet set1 = new PieDataSet(yVals1, "Election Results");
        set1.setSliceSpace(3f);
        set1.setColors(ColorTemplate.createColors(getApplicationContext(),
                ColorTemplate.VORDIPLOM_COLORS));

        PieData data = new PieData(xVals, set1);
        mChart.setData(data);

        // undo all highlights
        mChart.highlightValues(null);

        // set a text for the chart center
        mChart.setCenterText("Total Value\n" + (int) mChart.getYValueSum() + "\n(all slices)");
        mChart.invalidate();
    }

    @Override
    public void onValueSelected(Entry e, int dataSetIndex) {
        Log.i("VAL SELECTED",
                "Value: " + e.getVal() + ", xIndex: " + e.getXIndex()
                        + ", DataSet index: " + dataSetIndex);
    }

    @Override
    public void onNothingSelected() {
        Log.i("PieChart", "nothing selected");
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        // TODO Auto-generated method stub

    }
}