Android Open Source - GreenerGasPedal Graph And Share Activity

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From Project

Back to project page GreenerGasPedal.

License

The source code is released under:

GNU General Public License

Java Source Code

package name.nanek.greenerpedal.activity;
//from  w w  w  . j  a  v a  2s  .co m
import java.util.List;

import name.nanek.greenerpedal.R;
import name.nanek.greenerpedal.activity.support.BitmapUtil;
import name.nanek.greenerpedal.activity.support.ShareUtil;
import name.nanek.greenerpedal.db.model.Reading;
import name.nanek.greenerpedal.db.model.dao.DataHelper;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.Toast;

import com.jjoe64.graphview.GraphView;
import com.jjoe64.graphview.GraphView.GraphViewData;
import com.jjoe64.graphview.GraphView.GraphViewSeries;
import com.jjoe64.graphview.GraphView.GraphViewStyle;
import com.jjoe64.graphview.GraphView.LegendAlign;
import com.jjoe64.graphview.LineGraphView;

public class GraphAndShareActivity extends Activity {
  
  private static class Stats {
    private Float min;
    private Float max;
    private Float start;
    private Float end;
    
    private void update(Float value) {
      if ( null == min || min < value ) {
        min = value;
      }

      if ( null == max || max > value ) {
        max = value;
      }

      if ( null == start ) {
        start = value;
      }

      if ( null != value ) {
        end = value;
      }
    }
    
    private String getDescription(String name, String units) {
      return name + " started at " + start + " " + units + " and ended at " + end + " " + units + ". The maximum was " + max + ".";
    }
  }
  
  private DataHelper data;
  
  private ViewGroup content;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.graph);
    content = (ViewGroup) findViewById(R.id.content);
    ViewGroup graphContent = (ViewGroup) findViewById(R.id.graph_content);
    
    data = new DataHelper(this);        

    long now = SystemClock.uptimeMillis();
    long oneHourAgo = now - ( 1000 * 60 * 60 );
    
    List<Reading> readings = data.readings.list(oneHourAgo);
    // TODO don't enable graph button until we have readings?
    if ( readings.isEmpty() ) {
      Toast.makeText(this, "Not enough readings to graph. Sorry.", Toast.LENGTH_LONG).show();
      finish();
      return;
    }
    
    GraphViewData[] gasUse = new GraphViewData[readings.size()];
    Stats gasStats = new Stats();
    GraphViewData[] breakUse = new GraphViewData[readings.size()];
    Stats breakStats = new Stats();
    GraphViewData[] moneySaved = new GraphViewData[readings.size()];
    Stats moneyStats = new Stats();

    int i = 0;
    //Float previousSecondsAgo;
    for(Reading reading : readings) {
      float secondsAgo = (now - reading.getTime()) / 1000;
      //if (null == previousSecondsAgo || previousSecondsAgo.equals(secondsAgo)) {
        //previousSecondsAgo = secondsAgo;
        gasUse[i] = new GraphViewData(secondsAgo, reading.getGasUse() / 10);
        breakUse[i] = new GraphViewData(secondsAgo, reading.getBreakUse() / 10);
        moneySaved[i] = new GraphViewData(secondsAgo, reading.getMoneySaved());
        i++;
      //}
    }
    
    GraphViewSeries gasUseSeries = new GraphViewSeries("Gas (10m/s\u00B2)", new GraphViewStyle(Color.RED, 5), gasUse);
    GraphViewSeries breakUseSeries = new GraphViewSeries("Stopping (10m/s\u00B2)", new GraphViewStyle(Color.parseColor("#ec7d00"), 5), breakUse);
    GraphViewSeries moneySavedSeries = new GraphViewSeries("Savings (\u00A2)", new GraphViewStyle(Color.parseColor("#00be31"), 5), moneySaved);
    
    GraphView graphView = new LineGraphView(this, "") {  
         @Override  
         protected String formatLabel(double value, boolean isValueX) {  
            if (isValueX) {  
              if ( value < 1000f) {
                return ((int)(value)) + "ms";
              }
              
              value /= 1000;
              
              if ( value < 60f ) {
                return ((int)(value)) + "s";
              }
              
              int minutes = (int)(value / 60);
              int secondsRemainder = ((int)(value)) - (minutes * 60);
              return minutes + "m" + secondsRemainder + "s";
              
            } else return super.formatLabel(value, isValueX); // let the y-value be normal-formatted  
         }  
      };  
    
    graphContent.addView(graphView);
    graphContent.setContentDescription("Recent Driving Stats: " 
        + gasStats.getDescription("Gas use ", " tens of meters per second squared ")
        + breakStats.getDescription("Breaking use ", " tens of meters per second squared ")
        + moneyStats.getDescription("Money saved ", " cents."));
    
    //((LineGraphView) graphView).setDrawBackground(true);

    // custom static labels
    //graphView.setHorizontalLabels(new String[] {"2 days ago", "yesterday", "today", "tomorrow"});
    //graphView.setVerticalLabels(new String[] {"high", "middle", "low"});
    graphView.addSeries(gasUseSeries);
    graphView.addSeries(breakUseSeries);
    graphView.addSeries(moneySavedSeries);
    graphView.setShowLegend(false);
    graphView.setScalable(true);

  }
  
  @Override
    public boolean onCreateOptionsMenu(Menu menu) {
      super.onCreateOptionsMenu(menu);
      
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.graph_menu, menu);
        return true;
    } 
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {

      switch (item.getItemId()) {
          case R.id.menuItemShare:
            ShareUtil.share(this, BitmapUtil.drawToBitmap(content), 0);
            return true;

          default:
              return super.onOptionsItemSelected(item);
      }
  }  
  
}

Java Source Code List

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