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package com.mapbox.mapboxsdk.testapp.utils;
import android.content.Context;
import android.text.TextUtils;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.services.commons.geojson.Feature;
import com.mapbox.services.commons.geojson.FeatureCollection;
import com.mapbox.services.commons.geojson.Point;
import com.mapbox.services.commons.models.Position;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
public class GeoParseUtil {
public static String loadStringFromAssets(final Context context, final String fileName) throws IOException {
if (TextUtils.isEmpty(fileName)) {
throw new NullPointerException("No GeoJSON File Name passed in.");
}
InputStream is = context.getAssets().open(fileName);
BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
return readAll(rd);
}
public static List<LatLng> parseGeoJsonCoordinates(String geojsonStr) {
List<LatLng> latLngs = new ArrayList<>();
FeatureCollection featureCollection = FeatureCollection.fromJson(geojsonStr);
for (Feature feature : featureCollection.getFeatures()) {
if (feature.getGeometry() instanceof Point) {
Position point = ((Point) feature.getGeometry()).getCoordinates();
latLngs.add(new LatLng(point.getLatitude(), point.getLongitude()));
}
}
return latLngs;
}
private static String readAll(Reader rd) throws IOException {
StringBuilder sb = new StringBuilder();
int cp;
while ((cp = rd.read()) != -1) {
sb.append((char) cp);
}
return sb.toString();
}
}
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