Android achartengine 饼图更新图例错误

Question

我的应用程序在使用图表引擎饼图时遇到问题。一切正常，但是当我尝试使用一些过滤数据更新图表时，图表图例变为灰色并且单击不标记选定的图表切片。

片段开始时：

当我点击刷新时：

我的代码：

public class StatistikaIslaidosFragment 扩展片段 {

private DBhelper db;
private HashMap<String, Double> chartData;
private View mRootView;
private static int[] COLORS = new int[] { Color.RED, Color.BLUE, Color.MAGENTA, Color.CYAN, Color.YELLOW, Color.WHITE, Color.DKGRAY };
private CategorySeries mSeries = new CategorySeries("");
private DefaultRenderer mRenderer = new DefaultRenderer();
private GraphicalView mChartView;
private Button firstDate, secondDate;
private ImageButton refresh;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    mRootView = inflater.inflate(R.layout.fragment_statistika_islaidos, container, false);
    db = new DBhelper(mRootView.getContext());
    chartData = new HashMap<String, Double>();
    firstDate = (Button) mRootView.findViewById(R.id.buttonDate1);
    secondDate = (Button) mRootView.findViewById(R.id.buttonDate2);
    refresh = (ImageButton) mRootView.findViewById(R.id.buttonRefresh);

    dateButtonsClick();
    collectChartData();
    fillPieChart();
    sliceClick();

    return mRootView;
}

private void setDayToToday(){
    Calendar c = Calendar.getInstance();
    c.roll(Calendar.MONTH, false);
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    String formattedDate = sdf.format(c.getTime());
    firstDate.setText(formattedDate);
    c = Calendar.getInstance();
    formattedDate = sdf.format(c.getTime());
    secondDate.setText(formattedDate);
}

private void dateButtonsClick(){
    setDayToToday();
    firstDate.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            DialogFragment picker = new DatePickerFragmentStatistic1();
            picker.show(getActivity().getFragmentManager(), "datePicker");
        }
    });

    secondDate.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            DialogFragment picker = new DatePickerFragmentStatistic2();
            picker.show(getActivity().getFragmentManager(), "datePicker");
        }
    });

    refresh.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mSeries.clear();
            mRenderer = new DefaultRenderer();
            chartData.clear();

            collectChartData();
            fillPieChart();
        }
    });
}

private void sliceClick(){
    mChartView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
            if (seriesSelection == null) {
                showMessage("No chart element was clicked");
            } else {
                for (int i = 0; i < mSeries.getItemCount(); i++) {
                    mRenderer.getSeriesRendererAt(i).setHighlighted(i == seriesSelection.getPointIndex());
                }
                mChartView.repaint();
                showMessage("Chart element data point index " + seriesSelection.getPointIndex()
                        + " was clicked" + " point value=" + seriesSelection.getValue());
            }
        }
    });
}

private void showMessage(String text){
    Toast.makeText(mRootView.getContext(), text, Toast.LENGTH_LONG).show();
}

private void chartSetings(){
    mRenderer.setApplyBackgroundColor(true);
    mRenderer.setBackgroundColor(getResources().getColor(R.color.theme_color));
    mRenderer.setChartTitleTextSize(20);
    mRenderer.setLabelsTextSize(40);
    mRenderer.setShowLabels(false);
    mRenderer.setLegendTextSize(40);
    mRenderer.setMargins(new int[]{20, 30, 15, 0});
    mRenderer.setZoomButtonsVisible(false);
    mRenderer.setStartAngle(90);

    if (mChartView == null) {
        LinearLayout layout = (LinearLayout) mRootView.findViewById(R.id.chart);
        mChartView = ChartFactory.getPieChartView(mRootView.getContext(), mSeries, mRenderer);
        mRenderer.setClickEnabled(true);
        mRenderer.setSelectableBuffer(10);
        layout.addView(mChartView, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,
                LinearLayout.LayoutParams.FILL_PARENT));
    } else {
        mChartView.repaint();
    }
}

private void fillPieChart(){
    chartSetings();
    for(String key: chartData.keySet())
    {
        mSeries.add(key.toString(), chartData.get(key));
        SimpleSeriesRenderer renderer = new SimpleSeriesRenderer();
        renderer.setColor(COLORS[(mSeries.getItemCount() - 1) % COLORS.length]);
        mRenderer.addSeriesRenderer(renderer);
        if (mChartView != null)
            mChartView.repaint();

    }
}

private void collectChartData(){
    List<Operation> data = db.getAllOperations();

    for (Operation op:data){
        Date start = strToDate(firstDate.getText().toString());
        Date finish = new Date();
        Date opDate = strToDate(op.getDate());
        if(op.getName().equals(getResources().getString(R.string.islaidos))) {
            if(opDate.after(start) && opDate.before(finish)) {
                if (chartData.containsKey(op.getCategory())) {
                    chartData.put(op.getCategory(), chartData.get(op.getCategory()) + Double.parseDouble(op.getMoney()));
                } else {
                    chartData.put(op.getCategory(), Double.parseDouble(op.getMoney()));
                }
            }
        }
    }

}

private Date strToDate(String str){
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    try {
        Date date = format.parse(str);
        return date;
    } catch (ParseException e) {
        e.printStackTrace();
        return null;
    }
}

}

刷新按钮点击代码：

        @Override
        public void onClick(View v) {
            mSeries.clear();
            mRenderer = new DefaultRenderer();
            chartData.clear();

            collectChartData();
            fillPieChart();
        }

请帮帮我

Answer 1

问题是 mRenderer = new DefaultRenderer();

我刚刚将这行代码更改为：

mRenderer.removeAllRenderers();

现在效果很好:)

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