Google Maps stoppt die App Leider

Question

Wir arbeiten mit einer Android-Anwendung die erste Seite ist Splash-Bildschirm und die spätere Seite ist Google-Karte. Diese Google Map-Aktivität macht die App leider in einigen Android-Handys wie Android-Version 4.4.2 zu stoppen. Aber in einigen Android-Handys funktioniert es gut. Ist die Google Map mit der Android API eingeschränkt?

Wenn es in Android-Version wie 4.4.2 ausgeführt wird. Es zeigt diesen Fehler an.

java.lang.RuntimeException: Unable to start activity ComponentInfo{salon.com.barber/salon.com.barber.GoogleMapsActivity}: java.lang.NullPointerException 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2342) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392) 
at android.app.ActivityThread.access$800(ActivityThread.java:151) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1266) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:136) 
at android.app.ActivityThread.main(ActivityThread.java:5421) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:970) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:786) 
at dalvik.system.NativeStart.main(Native Method) 
Caused by: java.lang.NullPointerException 
at salon.com.barber.GoogleMapsActivity.populateMap(GoogleMapsActivity.java:287) 
at salon.com.barber.GoogleMapsActivity.onCreate(GoogleMapsActivity.java:205) 
at android.app.Activity.performCreate(Activity.java:5263) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1099) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2282) 
... 11 more 

Meine Google Map-Aktivität ist

public class GoogleMapsActivity extends FragmentActivity { 

ImageButton imageButton; 
NavDrawerListAdapterSalonDetails adapternav; 
DrawerLayout dLayout; 
List<NavDrawerSalonDetailsItem> menu; 
private ProgressDialog pDialog; 
ListView dList1; 
private GoogleMap mMap; 
GPSTracker gps; 
boolean isGpsON; 
ArrayList<String> arry_salondetails; 
String SaloonDetails = ""; 
String Street = null; 
String Zipcode = null; 
String HouseNumber = null; 
String City = null; 
//final ArrayList<String> SalonNames = new ArrayList<String>(); 
final HashMap SalonData = new HashMap(); 

double lati,longi; 
final ArrayList<String> serviceDataList = new ArrayList<String>(); 
Boolean isInternetPresent; 
JSONObject objectNextClass; 
private GoogleMap googleMap; 
JSONArray saloonDetails = null; 
RelativeLayout selectedLayout; 
double latitude, longitude, range; 
String tableName = "barber"; 
Marker selectedMarker; 
ImageButton button_bookmark ; 
String objectId = ""; 
public static final String BARBER_MAP_PREFS = "MAP_PREFS"; 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 




    setContentView(R.layout.activity_google_maps); 
    selectedLayout = (RelativeLayout) findViewById(R.id.selectedView); 


    networkCheck cd = new networkCheck(getApplicationContext()); 
    isInternetPresent = cd.isConnectingToInternet(); // true or 
    // false 

    Log.i("sfeeee", "wwwwwww111w"); 




    SharedPreferences prefs = getSharedPreferences(BARBER_MAP_PREFS, MODE_PRIVATE); 
    String r = prefs.getString("range", null); 
    if (r == null) { 
     SharedPreferences.Editor editor = prefs.edit(); 

     editor.putString("range", "10"); 
     editor.commit(); 
    } 


    AndroidLog.appendLog("En:2"); 
    imageButton =(ImageButton) findViewById(R.id.Search_btn); 

    imageButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     // On click function 
     public void onClick(View view) { 
      // Create the intent to start another activity 
      Log.i("sfeeee1111111", "wwwwwwww"); 
      Intent i = new Intent(GoogleMapsActivity.this, Search.class); 
      startActivity(i); 
     } 
    }); 


    AndroidLog.appendLog("Ex:2"); 


    dLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
    dList1 = (ListView) findViewById(R.id.list_slidermenu); 

    menu = getNavDraweItemList(); 
    adapternav = new NavDrawerListAdapterSalonDetails(this, menu); 
    LayoutInflater inflater=this.getLayoutInflater(); 
    View header=inflater.inflate(R.layout.footer, null); 
    dList1.addHeaderView(header); 
    dList1.setAdapter(adapternav); 

    ImageButton buttonMenu =((ImageButton) findViewById(R.id.buttonMenu)); 

    dList1.setOnItemClickListener(new AdapterView.OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> parent, View view, 
           int position, long id) { 

      getListPosition(position); 


      // TODO Auto-generated method stub 

     } 
    }); 

    buttonMenu.setOnClickListener(new View.OnClickListener() { 
     @Override 
     // On click function 
     public void onClick(View view) { 

      dLayout.openDrawer(dList1); 

     } 
    }); 


    ImageButton button_map=(ImageButton) findViewById(R.id.button_map); 
    Log.i("111111111111111", "qqqqqqqqqqqqq"); 
    button_map.setOnClickListener(new View.OnClickListener() { 
     @Override 
     // On click function 
     public void onClick(View view) { 
      // Create the intent to start another activity 

      if (isInternetPresent) { 
       LatLng myCurrentLoc = getCurrentLoaction(); 
       Log.i("mycurrentLoc", myCurrentLoc.toString()); 
       Log.i("2222222222211", "qqqqqqqqqqqqq"); 
       mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(
         (myCurrentLoc), 11)); 
       Log.i("3333333333333331", "qqqqqqqqqqqqq"); 
      } 
     } 
    }); 



    AndroidLog.appendLog("En:3"); 
    if (isInternetPresent) { 
     // Calling async task to get json 
     //new getLocationData().execute(); 
     populateMap(); 
     AndroidLog.appendLog("Ex:3"); 
     Log.i("4444444411111", "qqqqqqqqqqqqq"); 
    } else { 

     // Internet connection not present 
     // Ask user to connect to Internet 
     showAlertDialog(GoogleMapsActivity.this, "No Internet Connection", 
       "You don't have internet connection.", false); 
    } 



    selectedLayout.setVisibility(View.GONE); 
    Button button = ((Button) selectedLayout 
      .findViewById(R.id.selec_button_id)); 

    button.setOnClickListener(new View.OnClickListener() { 
     @Override 
     // On click function 
     public void onClick(View view) { 
      // Create the intent to start another activity 
      Intent intent = new Intent(view.getContext(), 
        Salon_Detail.class); 

      //intent.putExtra("SalonName", (CharSequence) nameView); 

      // intent.putExtra("json", objectNextClass.toString()); 

      startActivity(intent); 
     } 
    }); 


} 




public void onDestroy() { 
    super.onDestroy(); 
    SharedPreferences prefs = getSharedPreferences(BARBER_MAP_PREFS, MODE_PRIVATE); 
    SharedPreferences.Editor editor = prefs.edit(); 
    editor.clear(); 

} 





public void populateMap(){ 

    Log.d("searched", "map"); 

    pDialog = new ProgressDialog(GoogleMapsActivity.this); 
    pDialog.setMessage("Please wait..."); 
    pDialog.setCancelable(false); 
    pDialog.show(); 

    if (mMap == null) { 
     mMap = ((MapFragment) getFragmentManager() 
       .findFragmentById(R.id.map)).getMap(); 
    } 

    LatLng myCurrentLoc = getCurrentLoaction(); 
    if(!isGpsON) 
    { 
     Toast.makeText(getApplicationContext(),"Switch on the location service for more accuracy", 
       30000).show(); 

    } 
    Log.i("Latti and Longii", myCurrentLoc.toString()); 
    latitude = myCurrentLoc.latitude; 
    Log.i("latitude of current Loc", String.valueOf(latitude)); 

    longitude = myCurrentLoc.longitude; 
    Log.i("longitudeofcurrent Loc",String.valueOf(longitude)); 

    mMap.addCircle(new CircleOptions() 

      .center(new LatLng(myCurrentLoc.latitude, 
        myCurrentLoc.longitude)).radius(10000) 
      .strokeColor(Color.parseColor("#34DDDD")).strokeWidth(6.0f) 
       .fillColor(Color.parseColor("#93D5E4"))); 

    Log.i("777777777777777", "qqqqqqqqqqqqq"); 

    mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(
      (myCurrentLoc), 11)); 
    Log.i("666666666666666666", "qqqqqqqqqqqqq"); 
    Marker TP = mMap.addMarker(new MarkerOptions().position(
      myCurrentLoc).title("").icon(BitmapDescriptorFactory.fromResource(R.mipmap.pin_blue))); 
    //icon(BitmapDescriptorFactory.fromResource(R.drawable.navigate)) 

    TP.showInfoWindow(); 
    Log.i("5555555555555555555555", "qqqqqqqqqqqqq"); 
    TP.setSnippet("currentLocation"); 


    SharedPreferences prefs = getSharedPreferences(BARBER_MAP_PREFS, MODE_PRIVATE); 
    range = Double.parseDouble(prefs.getString("range",null)); 


    //range = 100; 




    new GmapUtil().onGetCustomMarkers(getApplicationContext(), longitude, latitude, range, tableName, 
      new GmapUtil.CustomMarker() { 
       @Override 
       public void onSuccess(String data) { 
        Log.i("resulttttttt od dataaa", data); 
        pDialog.hide(); 

        try { 
         JSONObject jsonObject = new JSONObject(data); 
         Log.i("jsonObjectttttttttttt", jsonObject.toString()); 
         JSONObject jsonObject1 = jsonObject.getJSONObject("data"); 
         Log.i("jsonObjecttttttt1", jsonObject1.toString()); 
         JSONArray jsonArray = jsonObject1.getJSONArray("results"); 

         for (int i = 0; i < jsonArray.length(); i++) { 
          final JSONObject child = jsonArray.getJSONObject(i); 
          //final String sName = child.getString("SalonName"); 
          //SalonNames.add(child.getString("SalonName")); 
          //Log.i("salonn namesss", SalonNames.toString()); 
          latitude = child.getDouble("Latitude"); 
          longitude = child.getDouble("Longitude"); 
          LatLng saloonLoc = new LatLng(latitude, longitude); 
          mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); 
          Marker marker = mMap.addMarker(new MarkerOptions() 
            .position(saloonLoc).title("TutorialsPoint").icon(BitmapDescriptorFactory.fromResource(R.mipmap.map_red))); 

          marker.setSnippet(child.getString("objectId")); 
          SalonData.put(child.getString("objectId"), child); 
          Log.i("8888888888888888", "qqqqqqqqqqqqq"); 
          // googleMap.setOnMarkerClickListener(this); 

          mMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() { 

             @Override 
             public boolean onMarkerClick(Marker marker) { 

              SaloonDetails = ""; 
              // Take some action here 
              String snippet = marker.getSnippet(); 
              objectId = snippet; 

              if (selectedMarker != null && !("currentLocation".equals(snippet))) { 
               selectedMarker.setIcon(BitmapDescriptorFactory.fromResource(R.mipmap.map_red)); 

              } 

              selectedMarker = marker; 
              if (!("currentLocation".equals(snippet))) 
               marker.setIcon(BitmapDescriptorFactory.fromResource(R.mipmap.map_blue)); 


              Log.i("TAG", "snippet::::" + snippet); 

              if ("currentLocation".equals(snippet)) { 
               selectedLayout.setVisibility(View.GONE); 
               //button_bookmark.setVisibility(View.GONE); 
               return false; 
              } else { 

               selectedLayout 
                 .setVisibility(View.VISIBLE); 



               TextView nameView = ((TextView) selectedLayout 
                 .findViewById(R.id.name_txt_id)); 
               TextView addressView = ((TextView) selectedLayout 
                 .findViewById(R.id.address_txt_id)); 



               try { 
                JSONObject jSalonData = (JSONObject)SalonData.get(snippet); 

                nameView.setText(jSalonData.getString("SalonName")); 
               } catch (Exception e) { 
                e.printStackTrace(); 
               } 


               try { 
                JSONObject jSalonData = (JSONObject)SalonData.get(snippet); 
                Log.i("jSalonData",jSalonData.toString()); 

                //addressView.append(System.getProperty("line.separator")); 
                City = jSalonData.optString("City"); 
                SaloonDetails = SaloonDetails + City; 
                Zipcode = jSalonData.optString("Zipcode"); 
                SaloonDetails = SaloonDetails +" "+ Zipcode; 
                HouseNumber = jSalonData.optString("HouseNumber"); 
                SaloonDetails = SaloonDetails +" "+ HouseNumber; 
                Street = jSalonData.optString("Street"); 
                SaloonDetails = SaloonDetails +" "+ Street; 
                Log.i("SaloonDetails", SaloonDetails); 
                //addressView.setText(jSalonData.getString("Zipcode")); 
                //addressView.setText(jSalonData.getString("City")); 
                addressView.setText(SaloonDetails); 

               } catch (Exception e) { 
                e.printStackTrace(); 
               } 
               return true; 
              } 
             } 

            }); 

         } 

        } catch (Exception e) { 
         Log.i("Exception", e.toString()); 
        } 


       } 

       @Override 
       public void onError(String data) { 

       } 
      }); 

} 



private LatLng getCurrentLoaction() { 
    // TODO Auto-generated method stub 
    Log.i("sfeeee","wwwwwwww"); 
    gps = new GPSTracker(GoogleMapsActivity.this); 

    // check if GPS enabled 
    if (gps.canGetLocation()) { 
     isGpsON=true; 
     double latitude = gps.getLatitude(); 
     double longitude = gps.getLongitude(); 

     LatLng latLng = new LatLng(latitude, longitude); 
     Log.i("Latiiiiiiiiii",latLng.toString()); 
     return latLng; 
     // \n is for new line 
    } else { 
     // can't get location 
     // GPS or Network is not enabled 
     // Ask user to enable GPS/network in settings 
     isGpsON=false; 
     LatLng latLng = new LatLng(52.156111,5.387827); 
     return latLng; 

    } 

} 

private List<NavDrawerSalonDetailsItem> getNavDraweItemList() { 


    String search = "Search"; 
    String Privacypolicy = "Privacy policy"; 
    String termsofconditions = "Terms and Conditions"; 
    String favorite = " Favourites"; 
    String Setting = "Settings"; 

    String[] list = new String[] {search, Privacypolicy,termsofconditions,favorite,Setting}; 
    int[] icons = { R.mipmap.small_search, R.mipmap.small_about_us }; 
    List<NavDrawerSalonDetailsItem> menu = new ArrayList<NavDrawerSalonDetailsItem>(); 
    for (int i = 0; i < list.length; i++) { 
     menu.add(new NavDrawerSalonDetailsItem(list[i], i)); 
    } 

    return menu; 
} 





/** 
* Function to display simple Alert Dialog 
* 
* @param context 
*   - application context 
* @param title 
*   - alert dialog title 
* @param message 
*   - alert message 
* @param status 
*   - success/failure (used to set icon) 
* */ 
@SuppressWarnings("deprecation") 
public void showAlertDialog(Context context, String title, String message, 
          Boolean status) { 
    AlertDialog alertDialog = new AlertDialog.Builder(context).create(); 
    // Setting Dialog Title 
    alertDialog.setTitle(title); 
    // Setting Dialog Message 
    alertDialog.setMessage(message); 
    // Setting OK Button 
    alertDialog.setButton("OK", new DialogInterface.OnClickListener() { 
     public void onClick(final DialogInterface dialog, final int which) { 

     } 
    }); 

    // Showing Alert Message 
    alertDialog.show(); 
} 


public void search(){ 

    // Create the intent to start another activity 
    Intent intent = new Intent(GoogleMapsActivity.this, Search.class); 

    startActivity(intent); 
} 

public void privacyPolicy(){ 


    // Create the intent to start another activity 
    Intent intent = new Intent(GoogleMapsActivity.this, privacypolicy.class); 

    startActivity(intent); 

} 

public void termsAndCondition(){ 


    // Create the intent to start another activity 
    Intent intent = new Intent(GoogleMapsActivity.this, Terms_and_condition.class); 

    startActivity(intent); 

} 

public void favorite(){ 
    Intent intent = new Intent(GoogleMapsActivity.this,comingsoon.class); 
    startActivity(intent); 
} 

public void Settings(){ 
    Intent intent = new Intent(GoogleMapsActivity.this,comingsoon.class); 
    startActivity(intent); 
} 




public void getListPosition(int position) { 

    switch (position) { 
     case 1: { 

      search(); 

      break; 
     } 
     case 2: { 
      privacyPolicy(); 
      break; 
     } 
     case 3: { 
      termsAndCondition(); 
      break; 
     } 
     case 4: { 
      favorite(); 

      break; 
     } 
     case 5: { 

      Settings(); 
      break; 
     } 
     default: { 

      break; 
     } 

    } 

} 

}

Answer 1

Um sicherzustellen, dass Sie eine Nicht-Null-Instanz von GoogleMap verwenden, sollten Sie implementieren OnMapReadyCallback. Aus der Dokumentation https://developers.google.com/android/reference/com/google/android/gms/maps/OnMapReadyCallback

Sobald eine Instanz dieser Schnittstelle auf einem MapFragment oder MapView-Objekt gesetzt ist, Verfahren der onMapReady (GoogleMap) ausgelöst wird, wenn die Karte ist bereit, verwendet werden und stellt eine Nicht-Null-Instanz von GoogleMap .: Also müssen, Ihre GoogleMapsActivity Bedürfnisse implementieren OnMapReadyCallback und Sie den Anruf Ihre populateMap(); Methode zum onMapReady Methode bewegen

:

public class GoogleMapsActivity extends FragmentActivity implements OnMapReadyCallback { 
    // ... 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // Remove populateMap(); and change it for 
     ((MapFragment) getFragmentManager() 
      .findFragmentById(R.id.map)).getMapAsync(this); 
    } 

    @Override 
    public void onMapReady(GoogleMap googleMap) { 
     mMap = googleMap; 
     populateMap(); 
    } 
}