Android Open Source - line-chart-view Date Line Chart Activity

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License

The source code is released under:

MIT License

Java Source Code

package org.hogel.android.linechartviewdemo;
//from  w ww .j ava 2  s. com
import org.hogel.android.linechartview.DateLineChartView;
import org.hogel.android.linechartview.LineChartStyle;
import org.hogel.android.linechartview.LineChartView;

import android.app.Activity;
import android.os.Bundle;
import android.text.format.DateFormat;
import android.view.ViewGroup;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

public class DateLineChartActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_date_chart);

        ViewGroup chartContainer = (ViewGroup) findViewById(R.id.chart_container);

        LineChartStyle lineChartStyle = new LineChartStyle();
        lineChartStyle.setDrawPointCenter(false);
        LineChartStyle.Border leftBottomBorder = new LineChartStyle.Border(
            LineChartStyle.Border.LEFT, LineChartStyle.Border.BOTTOM
        );
        leftBottomBorder.setWidth(8.0f);
        lineChartStyle.addBorder(leftBottomBorder);
        lineChartStyle.setXLabelFormatter(new LineChartStyle.LabelFormatter() {
            @Override
            public String format(long value) {
                return DateFormat.format("M/d", value).toString();
            }
        });
        lineChartStyle.setYLabelWidth(80.0f);
        DateLineChartView chartView = new DateLineChartView(this, lineChartStyle);
        chartView.setStyle(lineChartStyle);
        chartView.setManualXGridUnit(2 * 24 * 60 * 60 * 1000);
        chartContainer.addView(chartView);

        chartView.setPoints(generatePoints());
        List<Long> yLabels = chartView.getYLabels();
        yLabels.remove(0);
        yLabels.remove(yLabels.size() - 1);
        chartView.setManualYLabels(yLabels);
    }

    private List<LineChartView.Point> generatePoints() {
        List<LineChartView.Point> points = new ArrayList<>();
        try {
            points.add(new LineChartView.Point(date("2014/07/01"), 100));
            points.add(new LineChartView.Point(date("2014/07/02"), 200));
            points.add(new LineChartView.Point(date("2014/07/03"), 400));
            points.add(new LineChartView.Point(date("2014/07/05"), 1100));
            points.add(new LineChartView.Point(date("2014/07/06"), 700));
            points.add(new LineChartView.Point(date("2014/07/08"), 1700));
            points.add(new LineChartView.Point(date("2014/07/09"), 2700));
            points.add(new LineChartView.Point(date("2014/07/10"), 100));
            points.add(new LineChartView.Point(date("2014/07/11"), 1200));
            points.add(new LineChartView.Point(date("2014/07/12"), 1100));
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
        return points;
    }

    private final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");

    private long date(String date) throws ParseException {
        return dateFormat.parse(date).getTime();
    }
}

Java Source Code List

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