RadarChart 与 Sqlite Android Studio 使用嵌套循环

Question

我正在努力处理这个雷达图。我想把每个客户都放在雷达图中。仅出现一个客户，其他客户的所有价值都会为该客户添加。有人可以帮我吗？

private void setupChartView() {
       RadarChart radarChart = findViewById(R.id.radarChart);

        ArrayList<RadarEntry> dataEntries = new ArrayList<>();

        Calendar calendar = Calendar.getInstance();
        int currentYear = calendar.get(Calendar.YEAR);
        SQLiteDatabase db = new DatabaseHelper(this).getWritableDatabase();
        Cursor getCustomer = db.rawQuery("select DISTINCT " + C_SALES_CUSTOMER + " FROM " + TABLESALES, null);

        for(int i=0; i<getCustomer.getCount(); i++) {

            getCustomer.moveToNext();
            @SuppressLint("Range")
            String customer =  getCustomer.getString(getCustomer.getColumnIndex(C_SALES_CUSTOMER));

            Cursor getSales = db.rawQuery("select * from " + TABLESALES + " where " + C_SALES_CUSTOMER + " like '%" + customer + "%'", null);
            for(int j=0; j<getSales.getCount(); j++) {
                getSales.moveToNext();
                @SuppressLint("Range")
                String sales =  getSales.getString(getSales.getColumnIndex(C_SALES_TOTAL));
                RadarEntry radarEntry = new RadarEntry(Integer.valueOf(sales));
                dataEntries.add(radarEntry);

                RadarDataSet radarDataSet = new RadarDataSet(dataEntries, customer);
                RadarData radarData = new RadarData();
                radarData.addDataSet(radarDataSet);
                radarChart.setData(radarData);
            }
        }
        radarChart.getDescription().setEnabled(false);

        Legend legend = radarChart.getLegend();
        legend.setXEntrySpace(7f);
        legend.setYEntrySpace(5f);
        legend.setYOffset(75f);
        legend.setTextSize(16f);
        legend.setHorizontalAlignment(Legend.LegendHorizontalAlignment.CENTER);
}

Answer 1

我自己找到了解决方案

private void setupChartView() {
    RadarChart radarChart = findViewById(R.id.radarChart);
    RadarData radarData = new RadarData();

    Calendar calendar = Calendar.getInstance();
    int currentYear = calendar.get(Calendar.YEAR);
    SQLiteDatabase db = new DatabaseHelper(this).getWritableDatabase();
    Cursor getCustomer = db.rawQuery("select DISTINCT " + C_SALES_CUSTOMER + " FROM " + TABLESALES, null);

    for(int i=0; i<getCustomer.getCount(); i++) {
        ArrayList<RadarEntry> dataEntries = new ArrayList<>();
        getCustomer.moveToNext();
        @SuppressLint("Range")
        String customer =  getCustomer.getString(getCustomer.getColumnIndex(C_SALES_CUSTOMER));
        Cursor getSales = db.rawQuery("select " + C_SALES_TOTAL + " from " + TABLESALES + " where " + C_SALES_CUSTOMER + " = '" + customer + "'", null);
        Toast.makeText(this, String.valueOf(getSales.getCount()), Toast.LENGTH_SHORT).show();
        for(int j=0; j<getSales.getCount(); j++) {

            getSales.moveToNext();
            @SuppressLint("Range")
            String sales =  getSales.getString(getSales.getColumnIndex(C_SALES_TOTAL));
            Toast.makeText(this, sales, Toast.LENGTH_SHORT).show();
            RadarEntry radarEntry = new RadarEntry(Integer.valueOf(sales));
            dataEntries.add(radarEntry);
        }
        RadarDataSet radarDataSet = new RadarDataSet(dataEntries, customer);
        int color= ((int)(Math.random()*16777215)) | (0xFF << 24);
        radarDataSet.setColor(color);
        radarData.addDataSet(radarDataSet);
    }

    radarChart.setData(radarData);
    radarChart.getDescription().setEnabled(false);

    Legend legend = radarChart.getLegend();
    legend.setXEntrySpace(7f);
    legend.setYEntrySpace(5f);
    legend.setYOffset(75f);
    legend.setTextSize(16f);
    legend.setHorizontalAlignment(Legend.LegendHorizontalAlignment.CENTER);
}