从 CSV 文件中读取经纬度并在对列应用过滤后显示在 google 地图中

Question

我设法从 CSV 中获取 long 和 lat 值并循环显示 google 地图中的所有值。现在我需要过滤列 Fuel_Type = "Unleaded 91" 如何添加它到 while 循环？ while( (line = reader.readLine()) != null)

这是我从 CSV 中获取数据的代码

 private void readDataFromCSV() {
        // Read the raw csv file
        InputStream is = getResources().openRawResource(R.raw.data);
        BufferedReader reader = new BufferedReader(
                new InputStreamReader(is, Charset.forName("UTF-8"))
        );
        boolean header = true;
        List<String> list = new ArrayList<>();
        List<LatLng> latLngList = new ArrayList<LatLng>();
        // Initialization
        try {
            reader.readLine();
            while( (line = reader.readLine()) != null) // Read until end of file
            {
                double lat = Double.parseDouble(line.split(",")[7]);
                double lon = Double.parseDouble(line.split(",")[8]);
                latLngList.add(new LatLng(lat, lon));
            }

// Add them to map
            for(LatLng pos : latLngList)
            {
                mMap.addMarker(new MarkerOptions().position(pos).title("title").icon(bitmapDescriptorFromVector(getApplicationContext(), R.drawable.seveneleven)));
                mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(pos, 18f));
                mMap.setInfoWindowAdapter(new CustomInfoWindowAdapter(MapsActivity.this));
            }
        } catch (IOException e) {
            Log.wtf("MapsActivity", "Error reading data file on line" + line, e);
            e.printStackTrace();
        }
    }

我的 CSV 文件：

SiteId,Site_Name,Site_Brand,Sites_Address_Line_1,Site_Suburb,Site_State,Site_Post_Code,Site_Latitude,Site_Longitude,Fuel_Type,Price,TransactionDateutc
61291313,7-Eleven Runaway Bay,BP,20 Bayview Street,Mungindi,QLD,4497,-27.923529,153.403729,Unleaded 91,1840,1/3/2022 0:00
61291313,Caltex Labrador,BP,150 Brisbane Road,Mungindi,QLD,4497,-27.924007,153.403869,Diesel,1860,2/3/2022 21:49
61291313,Coles shell,BP,69 Frank Street,Mungindi,QLD,4497,-27.923863,153.403528,Diesel,1900,3/3/2022 22:21
61291313,BP Shop Helensvale,BP,2 Discovery Drive,Mungindi,QLD,4497,-27.923655,153.403608,Diesel,2150,9/3/2022 23:12

Answer 1

您可以检查 line 是否包含您的燃料类型，如下所示：

while( (line = reader.readLine()) != null) // Read until end of file
   {
       if(line.contains("YOUR_FUEL_TYPE"){
           double lat = Double.parseDouble(line.split(",")[7]);
           double lon = Double.parseDouble(line.split(",")[8]);
           latLngList.add(new LatLng(lat, long));

       }
}

从 CSV 文件中读取经纬度并在对列应用过滤后显示在 google 地图中

Reading Latitude and longitude from CSV file and display in google map after applying filtering to a column

csv

android

google-maps

arraylist