Android maps v2, polygon error

Question

I am having trouble adding my polygon with holes to my google map.

It was working with polylines (and I think once with polygon) but now it doesn't, whether the holes logic is there or not.

Here is all the code and it happens after the map is setup.

 01-25 16:22:53.921: E/AndroidRuntime(22986): Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 01-25 16:22:53.921: E/AndroidRuntime(22986): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257) 01-25 16:22:53.921: E/AndroidRuntime(22986): at java.util.ArrayList.get(ArrayList.java:311) 01-25 16:22:53.921: E/AndroidRuntime(22986): at maps.y.bb.a(Unknown Source) 01-25 16:22:53.921: E/AndroidRuntime(22986): at maps.y.bb.c(Unknown Source) 01-25 16:22:53.921: E/AndroidRuntime(22986): at maps.y.bg.a(Unknown Source) 01-25 16:22:53.921: E/AndroidRuntime(22986): at maps.y.bg.b(Unknown Source) 01-25 16:22:53.921: E/AndroidRuntime(22986): at maps.y.ae.addPolygon(Unknown Source) 01-25 16:22:53.921: E/AndroidRuntime(22986): at com.google.android.gms.maps.internal.IGoogleMapDelegate$Stub.onTransact(IGoogleMapDelegate.java:152) 

try {

        JSONObject boundaries = new JSONObject("{\"type\":\"MultiPolygon\",\"coordinates\":[[[[-80.735555859,35.0606584407],[-80.7297754512,35.0651878022],[-80.729139294,35.0656818503],[-80.7289250745,35.065900852],[-80.7286221912,35.0660671391],[-80.7282894137,35.066312794],[-80.7275260823,35.0669496861],[-80.7230724393,35.0660242895],[-80.7227950616,35.0661147593],[-80.7218902721,35.0659176785],[-80.722176045,35.0657643995],[-80.720961508,35.0641575183],[-80.7209758716,35.0629317403],[-80.7272283465,35.0628131662],[-80.726641114,35.061423483],[-80.7265854346,35.061015353],[-80.7266510423,35.0606220672],[-80.7235677631,35.0606937582],[-80.7234837301,35.0595787025],[-80.7255096391,35.0597210677],[-80.7270440474,35.0598206983],[-80.7271985668,35.0591829945],[-80.7274183452,35.0587709241],[-80.7277152978,35.0585124776],[-80.7284566533,35.0579768923],[-80.727780986,35.0597106844],[-80.7299847264,35.0599581722],[-80.735555859,35.0606584407]]],[[[-80.7200742118,35.0674134672],[-80.7186999337,35.0705562642],[-80.7164176998,35.069933693],[-80.7150980153,35.0696170679],[-80.7157433595,35.0657510316],[-80.7152719628,35.0657629702],[-80.7150541804,35.0646523049],[-80.7155138273,35.0644640927],[-80.7169133321,35.0639508082],[-80.7172970965,35.0637601058],[-80.7175728371,35.0635834077],[-80.7183107407,35.0631329539],[-80.7184931359,35.0630502037],[-80.7186006099,35.0648619253],[-80.7185879713,35.0648540961],[-80.7186006849,35.0648654865],[-80.7200742118,35.0674134672]]],[[[-80.6892017218,35.0865938467],[-80.6836074596,35.0872774004],[-80.6836037958,35.0872706912],[-80.683607554,35.087262573],[-80.6838084759,35.0843125317],[-80.6838093023,35.0838010413],[-80.6907731212,35.082005808],[-80.6906868717,35.0819147663],[-80.6914540109,35.0819508048],[-80.6923350028,35.0819883607],[-80.6922022291,35.0818062139],[-80.6906081064,35.081775524],[-80.6892627084,35.0801975391],[-80.6880259464,35.0787334166],[-80.6876700467,35.0784015634],[-80.6863873389,35.0787500748],[-80.6833236198,35.0795693995],[-80.682052189,35.0799145893],[-80.6813631325,35.078511382],[-80.6824880399,35.0773168152],[-80.6831273312,35.0766747942],[-80.6839730169,35.0757398452],[-80.6847449558,35.0749088381],[-80.6851125671,35.0745232176],[-80.6868562873,35.0762921663],[-80.6869385663,35.0762348787],[-80.6880385407,35.075857727],[-80.6893815702,35.0756767665],[-80.6893041844,35.0757870067],[-80.6895418941,35.0757244239],[-80.6910892479,35.0753347457],[-80.6953548167,35.074308825],[-80.6947217548,35.0726824065],[-80.6938249008,35.0708171642],[-80.6928755869,35.0707476456],[-80.6926063661,35.0700471051],[-80.6965836865,35.0702385147],[-80.6981317926,35.0702759198],[-80.6993134907,35.0702479401],[-80.699303851,35.0720088657],[-80.7044604692,35.0700231034],[-80.7059676219,35.0694258442],[-80.7064318242,35.070114517],[-80.7062358632,35.0718825479],[-80.7070931359,35.0713564697],[-80.7099609034,35.0704230355],[-80.7099936802,35.0705152827],[-80.7100080651,35.0705503962],[-80.7099495884,35.0705908523],[-80.7100187353,35.0707057082],[-80.7100167527,35.0707880413],[-80.7100972756,35.0709149296],[-80.7101379822,35.0710881063],[-80.7102138409,35.0711693359],[-80.7101846935,35.071247158],[-80.7102411258,35.0714097659],[-80.7103023493,35.0715003479],[-80.710389265,35.0715783724],[-80.707476454,35.073601],[-80.7077178913,35.0739755754],[-80.7087496883,35.0733147365],[-80.7090951077,35.0738737844],[-80.7115336827,35.0724004396],[-80.7115289543,35.0723517336],[-80.7119904436,35.0722567899],[-80.7119402102,35.0721599562],[-80.7120096157,35.0721101991],[-80.712379284,35.0734705994],[-80.71269176,35.0745787999],[-80.7130325591,35.0757993846],[-80.710920954,35.0773077532],[-80.7093642515,35.0784028049],[-80.7099841194,35.080555276],[-80.7091997899,35.0811729934],[-80.7086062698,35.0816605739],[-80.706153571,35.0835724102],[-80.7052694052,35.0842067533],[-80.7034908473,35.0856980884],[-80.7023961873,35.0865548562],[-80.7013399763,35.087478134],[-80.7000482398,35.0884900711],[-80.6986890109,35.0896462123],[-80.6963494752,35.0914593015],[-80.6948488535,35.0925786583],[-80.694848095,35.0926560399],[-80.6944683903,35.0943039003],[-80.6928489794,35.0942189034],[-80.6912333698,35.0954877374],[-80.6814301091,35.1033733546],[-80.6759910014,35.1036684268],[-80.676284034,35.104210002],[-80.6762103702,35.1042354101],[-80.67719044,35.1057185102],[-80.6775701585,35.1063259403],[-80.6754613322,35.1076781632],[-80.6748644376,35.1080552826],[-80.673594298,35.1090666249],[-80.6719077296,35.1103946423],[-80.6703790777,35.1116472926],[-80.6699256895,35.1112450928],[-80.6696705955,35.112193583],[-80.6690859143,35.1120827809],[-80.668908562,35.1126613551],[-80.6680473027,35.1124955642],[-80.6678832061,35.1131327573],[-80.6677639689,35.1131069686],[-80.667556535,35.1131220256],[-80.667453441,35.1131600278],[-80.666459359,35.1137102408],[-80.6663306762,35.1137668849],[-80.6660559502,35.1139383296],[-80.6655854342,35.1143319477],[-80.6654890957,35.1145192204],[-80.6650770434,35.1148693555],[-80.6647153446,35.1145700964],[-80.6636426861,35.11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.1246066092],[-80.6528906852,35.1249466072],[-80.6532924569,35.1244503397],[-80.65281726,35.1240697132],[-80.6520579506,35.1235832327],[-80.6514432342,35.1230763396],[-80.6536903079,35.1210434418]],[[-80.617690965,35.1427690358],[-80.6227869511,35.1416408722],[-80.6214124412,35.1407188194],[-80.6209892347,35.1385146979],[-80.6203344141,35.1350671264],[-80.6216818774,35.1351907031],[-80.6227009082,35.1361402694],[-80.6238353171,35.1359550455],[-80.6237929422,35.1355589835],[-80.6207782633,35.1331063498],[-80.622164895,35.1299996851],[-80.6221723268,35.1286397069],[-80.6212307912,35.1281140592],[-80.6178975387,35.1321817104],[-80.6162974308,35.136707716],[-80.6175013245,35.1417628101],[-80.617690965,35.1427690358]],[[-80.6172865761,35.1420216347],[-80.6172860889,35.1420203672],[-80.6172853756,35.1420203768],[-80.6172865761,35.1420216347]]]]}");
        JSONArray coordinates = boundaries.getJSONArray("coordinates");


        for(int i = 0; i < coordinates.length(); i++){
            try {
                JSONArray currentPerimeter = coordinates.getJSONArray(i).getJSONArray(0);

                ArrayList<LatLng> holesArray = new ArrayList<LatLng>();
                ArrayList<ArrayList<LatLng>> holesHolder = new ArrayList<ArrayList<LatLng>>();
                ArrayList<LatLng> mainArray = new ArrayList<LatLng>();


                for(int j = 0; j < currentPerimeter.length(); j++){ //this just adds outlines and outlying objects, but no holes.
                    mainArray.add(new LatLng(currentPerimeter.getJSONArray(j).getDouble(1), currentPerimeter.getJSONArray(j).getDouble(0)));

                }
                JSONArray holes = coordinates.getJSONArray(i);
                if(holes.length()>0)
                {

                    //new for loop to make holes
                    for(int j = 1; j < holes.length(); j++)
                    {
                        holesArray.add(new LatLng(holes.getJSONArray(j).getDouble(1), holes.getJSONArray(j).getDouble(0)));
                    }
                }

                mMap.addPolygon(new PolygonOptions().strokeWidth(3).strokeColor(0xFFEE8888).addAll(mainArray).addHole(holesArray));
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

Answer 1

The problems seems to be that addHole does not guard against a zero length array for holes. So, you should check to make sure you do not pass it a zero length array, because you are passing a zero-length array. Putting that guard in and logging your caught exceptions reveals your parsing is going awry in for your holes.

Specifically,

holesArray.add(new LatLng(holes.getJSONArray(j).getDouble(1), holes.getJSONArray(j).getDouble(0)));

is throwing --

org.json.JSONException: Value [-80.6696999375,35.0941296997] at 1 of type org.json.JSONArray cannot be converted to double

So, you are trying to parse an array as a double . I think your problem is that this line --

JSONArray holes = coordinates.getJSONArray(i);

should be something else. My previous suggestion got it to work, but I don't think it was semantically correct, because it was repeating the same array as above. It is not clear from your JSON where holes should be, but that it line is where you should start to look. Perhaps something like,

if (coordinates.getJSONArray(i).length() > 1) {
   JSONArray holes = coordinates.getJSONArray(i).getJSONArray(1);
   if (holes.length() > 0) {
       // new for loop to make holes
       for (int j = 1; j < holes.length(); j++) {
       holesArray.add(new LatLng(holes.getJSONArray(j).getDouble(1), holes.getJSONArray(j).getDouble(0)));
       }
    }
}