问题
I am trying to use a local Json file to display markers on the google maps api. The problem is that i get this error.
W/System.err: org.json.JSONException: Value {"predictions":[{"description":"GAME Paisley, High Street, Paisley, UK","id":"d4fafbac99296d0a545170bb9af984e6251ac917","matched_substrings":[{"length":4,"offset":0}],"place_id":"ChIJN0z6gTdJiEgREKQBicnWcAs","reference":"ChIJN0z6gTdJiEgREKQBicnWcAs","structured_formatting":{"main_text":"GAME Paisley","main_text_matched_substrings":[{"length":4,"offset":0}],"secondary_text":"High Street, Paisley, UK"},"terms":[{"offset":0,"value":"GAME Paisley"},{"offset":14,"value":"High Street"},{"offset":27,"value":"Paisley"},{"offset":36,"value":"UK"}],"types":["establishment"]},{"description":"GAME Glasgow Union Street, Union Street, Glasgow, UK","id":"9579c1d2df7575a2eb479ccd987cf29ab0ab9c6e","matched_substrings":[{"length":4,"offset":0}],"place_id":"ChIJ2YlAjJ5GiEgRu7aBLOFlkkc","reference":"ChIJ2YlAjJ5GiEgRu7aBLOFlkkc","structured_formatting":{"main_text":"GAME Glasgow Union Street","main_text_matched_substrings":[{"length":4,"offset":0}],"secondary_text":"Union Street, Glasgow, UK"},"terms":[{"offset":0,"value":"GAME Glasgow Union Street"},{"offset":27,"value":"Union Street"},{"offset":41,"value":"Glasgow"},{"offset":50,"value":"UK"}],"types":["establishment"]},{"description":"Game, Saint Enoch Square, Glasgow, UK","id":"582edc64f3d6654d8ff9a8da364c37a8e0544102","matched_substrings":[{"length":4,"offset":0}],"place_id":"ChIJq2yljp5GiEgRpsnAfUFKGEA","reference":"ChIJq2yljp5GiEgRpsnAfUFKGEA","structured_formatting":{"main_text":"Game","main_text_matched_substrings":[{"length":4,"offset":0}],"secondary_text":"Saint Enoch Square, Glasgow, UK"},"terms":[{"offset":0,"value":"Game"},{"offset":6,"value":"Saint Enoch Square"},{"offset":26,"value":"Glasgow"},{"offset":35,"value":"UK"}],"types":["establishment"]},{"description":"GAME Glasgow King's Inch Road, King's Inch Road, Glasgow, UK","id":"b60dbbc529f25226dfee4c05c80de8e92137588d","matched_substrings":[{"length":4,"offset":0}],"place_id":"ChIJv2Te_ENPiEgRknxQydZhR8Q","reference":"ChIJv2Te_ENPiEgRknxQydZhR8Q","structured_formatting":{"main_text":"GAME Glasgow King's Inch Road","main_text_matched_substrings":[{"length":4,"offset":0}],"secondary_text":"King's Inch Road, Glasgow, UK"},"terms":[{"offset":0,"value":"GAME Glasgow King's Inch Road"},{"offset":31,"value":"King's Inch Road"},{"offset":49,"value":"Glasgow"},{"offset":58,"value":"UK"}],"types":["establishment"]},{"description":"GAME, Cowglen Road, Glasgow, UK","id":"86a4ed10b3b9b609f68533f1c47dc8f9ae5d2aee","matched_substrings":[{"length":4,"offset":0}],"place_id":"ChIJT3vEiYRIiEgR4EIqP8jmL6o","reference":"ChIJT3vEiYRIiEgR4EIqP8jmL6o","structured_formatting":{"main_text":"GAME","main_text_matched_substrings":[{"length":4,"offset":0}],"secondary_text":"Cowglen Road, Glasgow, UK"},"terms":[{"offset":0,"value":"GAME"},{"offset":6,"value":"Cowglen Road"},{"offset":20,"value":"Glasgow"},{"offset":29,"value":"UK"}],"types":["establishment"]}],"status":"OK"} of type org.json.JSONObject cannot be converted to JSONArray W/System.err: at org.json.JSON.typeMismatch(JSON.java:111) at org.json.JSONArray.(JSONArray.java:96) at org.json.JSONArray.(JSONArray.java:108) at nearbyplaces.pnai.uws.com.maplocation.MapsActivity$AsyncTaskGetMareker.doInBackground(MapsActivity.java:112) at nearbyplaces.pnai.uws.com.maplocation.MapsActivity$AsyncTaskGetMareker.doInBackground(MapsActivity.java:102)
at android.os.AsyncTask$2.call(AsyncTask.java:304) W/System.err: atjava.util.concurrent.FutureTask.run(FutureTask.java:237) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:243) W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) at java.lang.Thread.run(Thread.java:762)
This is my Map activity Code
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
gps = new TrackGPS(MapsActivity.this);
new AsyncTaskGetMareker().execute();
/*
if(gps.canGetLocation()){
currentLoc= new LatLng(gps.getLatitude(),gps.getLongitude());
Log.d(TAG, "onMapReady: Got Location: " +gps.getLatitude() + " " + gps.getLongitude());
// Add a marker in Sydney and move the camera
mMap.addMarker(new MarkerOptions()
.position(currentLoc)
.title("CurrentLocation"));
Log.d(TAG, "onMapReady: Displaying Map");
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(currentLoc,15));
}else{
gps.showAlert();
}
*/
}
public String getJSONFromAssets() {
String json = null;
try {
InputStream inputData = getAssets().open("gameStores.json");
int size = inputData.available();
byte[] buffer = new byte[size];
inputData.read(buffer);
inputData.close();
json = new String(buffer, "UTF-8");
} catch (IOException ex) {
ex.printStackTrace();
return null;
}
return json;
}
private class AsyncTaskGetMareker extends AsyncTask<String , String, JSONArray> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected JSONArray doInBackground(String... strings) {
String stationsJsonString = getJSONFromAssets();
try {
JSONArray stationsJsonArray = new JSONArray(stationsJsonString);
return stationsJsonArray;
} catch (JSONException e) {
e.printStackTrace();
}
//This will only happen if an exception is thrown above:
return null;
}
protected void onPostExecute (JSONArray result){
if (result !=null){
for (int i =0; i <result.length(); i++){
JSONObject jsonObject= null;
try {
jsonObject= result.getJSONObject(i);
String name=jsonObject.getString("name");
String lat=jsonObject.getString("lat");
String lang=jsonObject.getString("lang");
drawMarker(new LatLng(Double.parseDouble(lat),
Double.parseDouble(lang)), name);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
private void drawMarker(LatLng point, String name) {
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(point);
markerOptions.snippet(name);
mMap.addMarker(markerOptions);
}
}
This is My json file
>
{ "predictions" : [
> {
> "description" : "GAME Paisley, High Street, Paisley, UK",
> "id" : "d4fafbac99296d0a545170bb9af984e6251ac917",
> "matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "place_id" : "ChIJN0z6gTdJiEgREKQBicnWcAs",
> "reference" : "ChIJN0z6gTdJiEgREKQBicnWcAs",
> "structured_formatting" : {
> "main_text" : "GAME Paisley",
> "main_text_matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "secondary_text" : "High Street, Paisley, UK"
> },
> "terms" : [
> {
> "offset" : 0,
> "value" : "GAME Paisley"
> },
> {
> "offset" : 14,
> "value" : "High Street"
> },
> {
> "offset" : 27,
> "value" : "Paisley"
> },
> {
> "offset" : 36,
> "value" : "UK"
> }
> ],
> "types" : [ "establishment" ]
> },
> {
> "description" : "GAME Glasgow Union Street, Union Street, Glasgow, UK",
> "id" : "9579c1d2df7575a2eb479ccd987cf29ab0ab9c6e",
> "matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "place_id" : "ChIJ2YlAjJ5GiEgRu7aBLOFlkkc",
> "reference" : "ChIJ2YlAjJ5GiEgRu7aBLOFlkkc",
> "structured_formatting" : {
> "main_text" : "GAME Glasgow Union Street",
> "main_text_matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "secondary_text" : "Union Street, Glasgow, UK"
> },
> "terms" : [
> {
> "offset" : 0,
> "value" : "GAME Glasgow Union Street"
> },
> {
> "offset" : 27,
> "value" : "Union Street"
> },
> {
> "offset" : 41,
> "value" : "Glasgow"
> },
> {
> "offset" : 50,
> "value" : "UK"
> }
> ],
> "types" : [ "establishment" ]
> },
> {
> "description" : "Game, Saint Enoch Square, Glasgow, UK",
> "id" : "582edc64f3d6654d8ff9a8da364c37a8e0544102",
> "matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "place_id" : "ChIJq2yljp5GiEgRpsnAfUFKGEA",
> "reference" : "ChIJq2yljp5GiEgRpsnAfUFKGEA",
> "structured_formatting" : {
> "main_text" : "Game",
> "main_text_matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "secondary_text" : "Saint Enoch Square, Glasgow, UK"
> },
> "terms" : [
> {
> "offset" : 0,
> "value" : "Game"
> },
> {
> "offset" : 6,
> "value" : "Saint Enoch Square"
> },
> {
> "offset" : 26,
> "value" : "Glasgow"
> },
> {
> "offset" : 35,
> "value" : "UK"
> }
> ],
> "types" : [ "establishment" ]
> },
> {
> "description" : "GAME Glasgow King's Inch Road, King's Inch Road, Glasgow, UK",
> "id" : "b60dbbc529f25226dfee4c05c80de8e92137588d",
> "matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "place_id" : "ChIJv2Te_ENPiEgRknxQydZhR8Q",
> "reference" : "ChIJv2Te_ENPiEgRknxQydZhR8Q",
> "structured_formatting" : {
> "main_text" : "GAME Glasgow King's Inch Road",
> "main_text_matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "secondary_text" : "King's Inch Road, Glasgow, UK"
> },
> "terms" : [
> {
> "offset" : 0,
> "value" : "GAME Glasgow King's Inch Road"
> },
> {
> "offset" : 31,
> "value" : "King's Inch Road"
> },
> {
> "offset" : 49,
> "value" : "Glasgow"
> },
> {
> "offset" : 58,
> "value" : "UK"
> }
> ],
> "types" : [ "establishment" ]
> },
> {
> "description" : "GAME, Cowglen Road, Glasgow, UK",
> "id" : "86a4ed10b3b9b609f68533f1c47dc8f9ae5d2aee",
> "matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "place_id" : "ChIJT3vEiYRIiEgR4EIqP8jmL6o",
> "reference" : "ChIJT3vEiYRIiEgR4EIqP8jmL6o",
> "structured_formatting" : {
> "main_text" : "GAME",
> "main_text_matched_substrings" : [
> {
> "length" : 4,
> "offset" : 0
> }
> ],
> "secondary_text" : "Cowglen Road, Glasgow, UK"
> },
> "terms" : [
> {
> "offset" : 0,
> "value" : "GAME"
> },
> {
> "offset" : 6,
> "value" : "Cowglen Road"
> },
> {
> "offset" : 20,
> "value" : "Glasgow"
> },
> {
> "offset" : 29,
> "value" : "UK"
> }
> ],
> "types" : [ "establishment" ]
> } ], "status" : "OK" }
回答1:
org.json.JSONObject cannot be converted to JSONArray
You root node is a JSONObject but you're parsing it using JSONArray.
Replace
JSONArray stationsJsonArray = new JSONArray(stationsJsonString);
with
JSONObject stationsJsonObject = new JSONObject(stationsJsonString);
来源：https://stackoverflow.com/questions/53397588/jsonexeption-when-parsing-local-json-file