Home | History | Annotate | Download | only in demos 
      1 /*
      2  * Copyright 2012 AndroidPlot.com
      3  *
      4  *    Licensed under the Apache License, Version 2.0 (the "License");
      5  *    you may not use this file except in compliance with the License.
      6  *    You may obtain a copy of the License at
      7  *
      8  *        http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  *    Unless required by applicable law or agreed to in writing, software
     11  *    distributed under the License is distributed on an "AS IS" BASIS,
     12  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  *    See the License for the specific language governing permissions and
     14  *    limitations under the License.
     15  */
     16 
     17 package com.androidplot.demos;
     18 
     19 import android.app.Activity;
     20 import android.graphics.*;
     21 import android.os.Bundle;
     22 import com.androidplot.xy.SimpleXYSeries;
     23 import com.androidplot.xy.XYSeries;
     24 import com.androidplot.xy.*;
     25 
     26 import java.text.*;
     27 import java.util.Arrays;
     28 import java.util.Date;
     29 
     30 public class TimeSeriesActivity extends Activity
     31 {
     32 
     33     private XYPlot plot1;
     34 
     35     @Override
     36     public void onCreate(Bundle savedInstanceState)
     37     {
     38         super.onCreate(savedInstanceState);
     39         setContentView(R.layout.time_series_example);
     40 
     41         plot1 = (XYPlot) findViewById(R.id.plot1);
     42         Number[] numSightings = {5, 8, 9, 2, 5};
     43 
     44         // an array of years in milliseconds:
     45         Number[] years = {
     46                 978307200,  // 2001
     47                 1009843200, // 2002
     48                 1041379200, // 2003
     49                 1072915200, // 2004
     50                 1104537600  // 2005
     51         };
     52         // create our series from our array of nums:
     53         XYSeries series2 = new SimpleXYSeries(
     54                 Arrays.asList(years),
     55                 Arrays.asList(numSightings),
     56                 "Sightings in USA");
     57 
     58         plot1.getGraphWidget().getGridBackgroundPaint().setColor(Color.WHITE);
     59         plot1.getGraphWidget().getDomainGridLinePaint().setColor(Color.BLACK);
     60         plot1.getGraphWidget().getDomainGridLinePaint().
     61                 setPathEffect(new DashPathEffect(new float[]{1, 1}, 1));
     62         plot1.getGraphWidget().getRangeGridLinePaint().setColor(Color.BLACK);
     63         plot1.getGraphWidget().getRangeGridLinePaint().
     64                 setPathEffect(new DashPathEffect(new float[]{1, 1}, 1));
     65         plot1.getGraphWidget().getDomainOriginLinePaint().setColor(Color.BLACK);
     66         plot1.getGraphWidget().getRangeOriginLinePaint().setColor(Color.BLACK);
     67 
     68         // Create a formatter to use for drawing a series using LineAndPointRenderer:
     69         LineAndPointFormatter series1Format = new LineAndPointFormatter(
     70                 Color.rgb(0, 100, 0),                   // line color
     71                 Color.rgb(0, 100, 0),                   // point color
     72                 Color.rgb(100, 200, 0), null);                // fill color
     73 
     74 
     75         // setup our line fill paint to be a slightly transparent gradient:
     76         Paint lineFill = new Paint();
     77         lineFill.setAlpha(200);
     78 
     79         // ugly usage of LinearGradient. unfortunately there's no way to determine the actual size of
     80         // a View from within onCreate.  one alternative is to specify a dimension in resources
     81         // and use that accordingly.  at least then the values can be customized for the device type and orientation.
     82         lineFill.setShader(new LinearGradient(0, 0, 200, 200, Color.WHITE, Color.GREEN, Shader.TileMode.CLAMP));
     83 
     84         LineAndPointFormatter formatter  =
     85                 new LineAndPointFormatter(Color.rgb(0, 0,0), Color.BLUE, Color.RED, null);
     86         formatter.setFillPaint(lineFill);
     87         plot1.getGraphWidget().setPaddingRight(2);
     88         plot1.addSeries(series2, formatter);
     89 
     90         // draw a domain tick for each year:
     91         plot1.setDomainStep(XYStepMode.SUBDIVIDE, years.length);
     92 
     93         // customize our domain/range labels
     94         plot1.setDomainLabel("Year");
     95         plot1.setRangeLabel("# of Sightings");
     96 
     97         // get rid of decimal points in our range labels:
     98         plot1.setRangeValueFormat(new DecimalFormat("0"));
     99 
    100         plot1.setDomainValueFormat(new Format() {
    101 
    102             // create a simple date format that draws on the year portion of our timestamp.
    103             // see http://download.oracle.com/javase/1.4.2/docs/api/java/text/SimpleDateFormat.html
    104             // for a full description of SimpleDateFormat.
    105             private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");
    106 
    107             @Override
    108             public StringBuffer format(Object obj, StringBuffer toAppendTo, FieldPosition pos) {
    109 
    110                 // because our timestamps are in seconds and SimpleDateFormat expects milliseconds
    111                 // we multiply our timestamp by 1000:
    112                 long timestamp = ((Number) obj).longValue() * 1000;
    113                 Date date = new Date(timestamp);
    114                 return dateFormat.format(date, toAppendTo, pos);
    115             }
    116 
    117             @Override
    118             public Object parseObject(String source, ParsePosition pos) {
    119                 return null;
    120 
    121             }
    122         });
    123 
    124         // by default, AndroidPlot displays developer guides to aid in laying out your plot.
    125         // To get rid of them call disableAllMarkup():
    126         //plot1.disableAllMarkup();
    127     }
    128 }