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PONullPointerException when using Google maps, android
 

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  1. PONullPointerException when using Google maps, android
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    <p>I am using Google maps in my android code, I want to get the address of my location using "Geocoder" class.</p> <p>this is the code I am using </p> <pre><code>Geocoder geocoder; List&lt;Address&gt; addresses = null; geocoder = new Geocoder(this, Locale.getDefault()); try { addresses = geocoder.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } </code></pre> <p>but I am getting a NullPointerException at this line:</p> <pre><code>addresses = geocoder.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1); </code></pre> <p>here is the full code</p> <pre><code>public class MainActivity extends Activity implements LocationListener { private TextView cityText; private TextView condDescr; private TextView temp; private TextView press; private TextView windSpeed; private TextView windDeg; private TextView hum; private ImageView imgView; Geocoder geocoder; String bestProvider; List&lt;Address&gt; user = null; double lat; double lng; public static String resultStr; private String latituteField; private String longitudeField; private LocationManager locationManager; private String provider; public String cityName; public Location loc; @Override public void onLocationChanged(android.location.Location loc) { // TODO Auto-generated method stub String longitude = "Longitude: " +loc.getLongitude(); // Log.v(TAG, longitude); String latitude = "Latitude: " +loc.getLatitude(); //Log.v(TAG, latitude); //String cityName=null; Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault()); List&lt;Address&gt; addresses; try { addresses = gcd.getFromLocation(loc.getLatitude(), loc .getLongitude(), 1); if (addresses.size() &gt; 0) System.out.println(addresses.get(0).getLocality()); cityName=addresses.get(0).getLocality(); } catch (IOException e) { e.printStackTrace(); } String s = longitude+"\n"+latitude + "\n\nMy Currrent City is: "+cityName; // editLocation.setText(s); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.d("hi","hi"); Geocoder geocoder; List&lt;Address&gt; addresses = null; geocoder = new Geocoder(this, Locale.getDefault()); try { addresses = geocoder.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } Log.d("addresses",addresses.toString()); locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); // Define the criteria how to select the locatioin provider -&gt; use // default Criteria criteria = new Criteria(); provider = locationManager.getBestProvider(criteria, false); android.location.Location location = locationManager.getLastKnownLocation(provider); // Initialize the location fields if (location != null) { System.out.println("Provider " + provider + " has been selected."); onLocationChanged(location); } else { System.out.println("location not available"); } // String city ="lat=%f&amp;lon=%f," ///////////////////////// cityText = (TextView) findViewById(R.id.cityText); condDescr = (TextView) findViewById(R.id.condDescr); temp = (TextView) findViewById(R.id.temp); hum = (TextView) findViewById(R.id.hum); press = (TextView) findViewById(R.id.press); windSpeed = (TextView) findViewById(R.id.windSpeed); windDeg = (TextView) findViewById(R.id.windDeg); imgView = (ImageView) findViewById(R.id.condIcon); JSONWeatherTask task = new JSONWeatherTask(); //task.execute(new String[]{city}); task.execute(new String[]{cityName}); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } private class JSONWeatherTask extends AsyncTask&lt;String, Void, Weather&gt; { @Override protected Weather doInBackground(String... params) { Weather weather = new Weather(); String data = ( (new WeatherHttpClient()).getWeatherData(params[0])); try { weather = JSONWeatherParser.getWeather(data); // Let's retrieve the icon weather.iconData = ( (new WeatherHttpClient()).getImage(weather.currentCondition.getIcon())); } catch (JSONException e) { e.printStackTrace(); } return weather; } @Override protected void onPostExecute(Weather weather) { super.onPostExecute(weather); if (weather.iconData != null &amp;&amp; weather.iconData.length &gt; 0) { Bitmap img = BitmapFactory.decodeByteArray(weather.iconData, 0, weather.iconData.length); imgView.setImageBitmap(img); } cityText.setText(weather.location.getCity() + "," + weather.location.getCountry()); condDescr.setText(weather.currentCondition.getCondition() + "(" + weather.currentCondition.getDescr() + ")"); temp.setText("" + Math.round((weather.temperature.getTemp() - 275.15)) + "°C"); hum.setText("" + weather.currentCondition.getHumidity() + "%"); press.setText("" + weather.currentCondition.getPressure() + " hPa"); windSpeed.setText("" + weather.wind.getSpeed() + " mps"); windDeg.setText("" + weather.wind.getDeg() + "°"); } } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub } } </code></pre> <p>and this is the logCat:</p> <pre><code>11-09 04:30:55.723: E/AndroidRuntime(1868): FATAL EXCEPTION: main 11-09 04:30:55.723: E/AndroidRuntime(1868): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.survivingwithandroid.weatherapp/com.survivingwithandroid.weatherapp.MainActivity}: java.lang.NullPointerException 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.app.ActivityThread.access$600(ActivityThread.java:141) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.os.Handler.dispatchMessage(Handler.java:99) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.os.Looper.loop(Looper.java:137) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.app.ActivityThread.main(ActivityThread.java:5103) 11-09 04:30:55.723: E/AndroidRuntime(1868): at java.lang.reflect.Method.invokeNative(Native Method) 11-09 04:30:55.723: E/AndroidRuntime(1868): at java.lang.reflect.Method.invoke(Method.java:525) 11-09 04:30:55.723: E/AndroidRuntime(1868): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 11-09 04:30:55.723: E/AndroidRuntime(1868): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 11-09 04:30:55.723: E/AndroidRuntime(1868): at dalvik.system.NativeStart.main(Native Method) 11-09 04:30:55.723: E/AndroidRuntime(1868): Caused by: java.lang.NullPointerException 11-09 04:30:55.723: E/AndroidRuntime(1868): at com.survivingwithandroid.weatherapp.MainActivity.onCreate(MainActivity.java:127) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.app.Activity.performCreate(Activity.java:5133) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 11-09 04:30:55.723: E/AndroidRuntime(1868): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) </code></pre>
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    1. PTQuestion
    1. USruaa.brkat
    1. USruaa.brkat
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    1. COwhere is loc?..
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      1. PONullPointerException when using Google maps, android
      1. USamalBit
    2. COPost your logcat error.Nd full code.
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      1. PONullPointerException when using Google maps, android
      1. USshiju B
    3. COlocation is null i think so please post your relevant code...
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      1. PONullPointerException when using Google maps, android
      1. USKailash Dabhi
 

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