标记不会在地图上显示，我不明白错误
My json file:[
{
"name": "aaaa",
"lat": 35.747394,
"lang": 51.267577
}
]
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
List<Position> positionsList = new ArrayList<>();
ProgressDialog progressDialog;
@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);
//delete if static
PositionsTask positionsTask = new PositionsTask();
positionsTask.execute();
// end delete
// positionsList.add(new Position("beb souika",1,1));
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
LatLng TUNIS = new LatLng(36.818248, 10.182416);
for(Position pos: positionsList){
LatLng latLng = new LatLng(pos.getLatitude(),pos.getLongitude());
if(mMap!=null){
mMap.addMarker(new MarkerOptions().position(latLng).title(pos.getName()));
}
}
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(TUNIS,11));
}
private class PositionsTask extends AsyncTask<Void, Void, Void> {
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_LATITUDE = "latitude";
private static final String TAG_lONGITUDE = "longitude";
@Override
protected void onPreExecute(){
progressDialog = new ProgressDialog(MapsActivity.this);
progressDialog.setMessage("Chargement en cours ...");
progressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
String link;
BufferedReader bufferedReader;
String result="[]";
try {
link = "http://192.168.8.105/map1.php";
URL url = new URL(link);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String line = null;
StringBuilder sb = new StringBuilder() ;
while ((line = bufferedReader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
} catch (Exception e) {
Log.e("Exception: ",e.getMessage());
}
positionsList = getPositionList(result);
return null;
}
@Override
protected void onPostExecute(Void params) {
progressDialog.dismiss();
}
@Override
protected void onCancelled() {
progressDialog.dismiss();
}
protected List getPositionList(String myJSON){
List<Position> positions = new ArrayList<>();
try {
JSONArray data = new JSONArray(myJSON);
for(int i=0;i<data.length();i++){
Position position = new Position();
JSONObject json = data.getJSONObject(i);
position.setId(json.getInt(TAG_ID));
position.setName(json.getString(TAG_NAME));
position.setLatitude(json.getDouble(TAG_LATITUDE));
position.setLongitude(json.getDouble(TAG_lONGITUDE));
positions.add(position);
}
} catch (JSONException e) {
e.printStackTrace();
}
return positions;
}
}
}
04-23 21:33:16.491 2567-3598/? E/Parcel: Class not found when unmarshalling: com.facebook.search.api.GraphSearchQuery
java.lang.ClassNotFoundException: com.facebook.search.api.GraphSearchQuery
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:324)
at android.os.Parcel.readParcelableCreator(Parcel.java:2404)
at android.os.Parcel.readParcelable(Parcel.java:2358)
at android.os.Parcel.readValue(Parcel.java:2264)
at android.os.Parcel.readArrayMapInternal(Parcel.java:2614)
at android.os.BaseBundle.unparcel(BaseBundle.java:221)
at android.os.BaseBundle.getString(BaseBundle.java:920)
at android.content.Intent.getStringExtra(Intent.java:6221)
at com.android.server.am.ActivityStackSupervisor.startActivityLocked(ActivityStackSupervisor.java:2751)
at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:2209)
at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:6591)
at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:6346)
at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:170)
at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:4166)
at android.os.Binder.execTransact(Binder.java:453)
Caused by: java.lang.ClassNotFoundException: com.facebook.search.api.GraphSearchQuery
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:324)
at android.os.Parcel.readParcelableCreator(Parcel.java:2404)
at android.os.Parcel.readParcelable(Parcel.java:2358)
at android.os.Parcel.readValue(Parcel.java:2264)
at android.os.Parcel.readArrayMapInternal(Parcel.java:2614)
at android.os.BaseBundle.unparcel(BaseBundle.java:221)
at android.os.BaseBundle.getString(BaseBundle.java:920)
at android.content.Intent.getStringExtra(Intent.java:6221)
at com.android.server.am.ActivityStackSupervisor.startActivityLocked(ActivityStackSupervisor.java:2751)
at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:2209)
at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:6591)
at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:6346)
at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:170)
at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:4166)
at android.os.Binder.execTransact(Binder.java:453)
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available