blob: d6a8280c6ad2e05a0d062e9f58ae2d2c90b263cf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
package com.mapbox.mapboxsdk.testapp.utils;
import android.content.Context;
import android.text.TextUtils;
import com.mapbox.mapboxsdk.geometry.LatLng;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
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) throws JSONException {
List<LatLng> latLngs = new ArrayList<>();
JSONObject jsonObject = new JSONObject(geojsonStr);
JSONArray features = jsonObject.getJSONArray("features");
int featureLength = features.length();
for (int j = 0; j < featureLength; ++j) {
JSONObject feature = features.getJSONObject(j);
JSONObject geometry = feature.getJSONObject("geometry");
String type = geometry.getString("type");
JSONArray coordinates;
if (type.equals("Polygon")) {
coordinates = geometry.getJSONArray("coordinates").getJSONArray(0);
} else {
coordinates = geometry.getJSONArray("coordinates");
}
int len = coordinates.length();
for (int i = 0; i < len; ++i) {
if (coordinates.get(i) instanceof JSONArray) {
JSONArray coord = coordinates.getJSONArray(i);
double lng = coord.getDouble(0);
double lat = coord.getDouble(1);
latLngs.add(new LatLng(lat, lng));
} else {
double lng = coordinates.getDouble(0);
double lat = coordinates.getDouble(1);
latLngs.add(new LatLng(lat, lng));
break;
}
}
}
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();
}
}
|
