Question

我试图从csv数据中获取第4和第5个元素，并将其用作第2个（mDatasetNormal）和第3个图形线的数据集。我能够弄清楚如何从第3个元素获取数据，但其余的是一个问题。

我的问题是：

如何阅读Heappy_log.csv并使用arrayList获取图表的数据？
从csv获取数据后如何将其用于同一图表？

CSV文件内容：

8月30-2014,08：06 AM，0,0,0

Sep-05-2014,08：09 AM，0,3,2

Sep-05-2014,08：09 AM，0,3,2

整个代码：

 public class Chart extends Activity {

ArrayList<Integer> stateList = new ArrayList<Integer>();
ArrayList<Integer> normalList = new ArrayList<Integer>();

//Chart creation
private GraphicalView mChart, mChartNormal;

/**
 * Create multiple data sets to be used on graph
 */
//Data sets used for graph manipulation
private XYMultipleSeriesDataset mDataset = new XYMultipleSeriesDataset();
private XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer();
private XYSeries mCurrentSeries;
private XYSeriesRenderer mCurrentRenderer;

private XYMultipleSeriesDataset mDatasetNormal = new XYMultipleSeriesDataset();
private XYMultipleSeriesRenderer mRendere2 = new XYMultipleSeriesRenderer();
private XYSeries mCurrentSeriesNormal;
private XYSeriesRenderer mCurrentRendererNormal;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // Code which makes activity full screen
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);

    setContentView(R.layout.activity_chart);
    readHappyLog();

}

//Create a method for the aChart engine
private void initChart() {

    //Series description for both charts
    mCurrentSeries = new XYSeries("Amount of happy kids");
    mDataset.addSeries(mCurrentSeries);

    mCurrentSeriesNormal = new XYSeries("Amount of normal kids");
    mDatasetNormal.addSeries(mCurrentSeriesNormal);

    //Renderer for happy kids
    mCurrentRenderer = new XYSeriesRenderer();
    mRenderer.addSeriesRenderer(mCurrentRenderer);

    mRenderer.setAxisTitleTextSize(24);
    mRenderer.setYLabelsPadding(20);
    mRenderer.setXLabelsPadding(10);
    mRenderer.setXTitle(" Date of practice ");
    mRenderer.setYTitle(" Number of kids ");

    //Renderer for normal kids
    mCurrentRendererNormal = new XYSeriesRenderer();
    mRendere2.addSeriesRenderer(mCurrentRendererNormal);
    mRendere2.setYTitle("Number of normal kids");

    //Applying background
    mRenderer.setApplyBackgroundColor(true);
    mRenderer.setBackgroundColor(Color.BLACK);
    mRenderer.setMarginsColor(Color.BLACK);
    mRenderer.setPointSize(20);
    mRenderer.setShowGrid(true);
    mRenderer.setAxesColor(Color.MAGENTA);
    mRenderer.setGridColor(Color.MAGENTA);
    mRenderer.setPanEnabled(true, true);
    mRenderer.setXAxisMin(0.0);
    mRenderer.setYAxisMin(0.0);
    mRenderer.setLabelsTextSize(24);

    //Sets the color of the graph line and width
    mCurrentRenderer.setColor(Color.GREEN);
    mCurrentRenderer.setLineWidth(10f);
    mCurrentRendererNormal.setColor(Color.BLUE);
    mCurrentRenderer.setLineWidth(10f);
}


//Add x and y data into the graph and mark the x graph

private void addHappyData(){
    Integer x = 0;
    for (Integer happy : stateList ){
        mCurrentSeries.add(x += 10, happy);
    }
}

//Add x and y for normal to the graph

private void addNormalData(){
    Integer y = 0;
    for (Integer happy : normalList ){
        mCurrentSeriesNormal.add(y += 10, happy);

        }

    }

// Draw the graph
@Override
protected void onResume() {
    super.onResume();
    LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
    if (mChart == null){
        initChart();
        addHappyData();
        addNormalData();

        //Set chart type
        mChart = ChartFactory.getLineChartView(this, mDataset , mRenderer);
        layout.addView(mChart);

        mChartNormal = ChartFactory.getLineChartView(this, mDatasetNormal,mRendere2);
        layout.addView(mChartNormal);



    }else{
        mChart.repaint();
        mChartNormal.repaint();

    }
}

/**
 * create a method to read the happy log
 */
private void readHappyLog(){
    String FILENAME = "happy_log.csv"; //Open the file name under this string
    FileInputStream inputStream = null; // Import the package
    String temp;
    String[] a;


    try {
        inputStream = openFileInput(FILENAME); //Open file desceriptor (Object)

        byte[] reader = new byte [inputStream.available() ]; //Everything from disk is byte

        while (inputStream.read( reader ) != -1 ){}

        //Reader array now holds the entire file
        //Needs to create scanner in order to read the file properly
        Scanner s = new Scanner (new String(reader));
        s.useDelimiter(("\\n"));

        while (s.hasNext()){

            //Split the string lines if he sees comma value
            temp = s.next();
            a = temp.split(",");


            stateList.add(Integer.parseInt(a[2]));
            normalList.add(Integer.parseInt(a[3]));

        }
        s.close();

    }catch (Exception e ){
        Log.e("Chart", e.getMessage());
    }finally {
        if (inputStream != null ){
            try{ inputStream.close();
            } catch (IOException e){
                Log.e( "Chart", e.getMessage());
            }
        }
    }
}

Answer 1

Problem solved:
//Add x and y data to series

private void addHappyData() {
    Integer x = 0;
    for (Integer happy : stateList) {
        mCurrentSeries.add(x += 10, happy);
    }
}
private void addNormalData() {
    Integer x = 0;
    for (Integer normal : normalList) {
        mNormalSeries.add(x += 10, normal);
    }
}

// Draw the graph
@Override
protected void onResume() {
    super.onResume();
    LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
    if (mChart == null) {
        initChart();
        addHappyData();
        addNormalData();

        //Set chart type
        mChart = ChartFactory.getLineChartView(this, mDataset, mRenderer);
        layout.addView(mChart);

    } else {
        mChart.repaint();

    }
}

/**
 * create a method to read the happy log
 */
private void readHappyLog() {
    String FILENAME = "happy_log.csv"; //Open the file name under this string
    FileInputStream inputStream = null; // Import the package
    String temp;
    String[] a;


    try {
        inputStream = openFileInput(FILENAME); //Open file desceriptor (Object)

        byte[] reader = new byte[inputStream.available()]; //Everything from disk is byte

        while (inputStream.read(reader) != -1) {
        }

        //Reader array now holds the entire file
        //Needs to create scanner in order to read the file properly
        Scanner s = new Scanner(new String(reader));
        s.useDelimiter(("\\n"));

        while (s.hasNext()) {

            //Split the string lines if he sees comma value
            temp = s.next();
            a = temp.split(",");

            stateList.add(Integer.parseInt(a[2]));
            normalList.add(Integer.parseInt(a[3]));


        }
        s.close();

    } catch (Exception e) {
        Log.e("Chart", e.getMessage());
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException e) {
                Log.e("Chart", e.getMessage());
            }
        }
    }
}

}

从CSV文件中为aGraphEngine（Android）调用值

1 个答案: