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Ich habe eine Anwendung, die eine GPS-Taste hat, um Ihren Standort und auch eine Google Maps-Ortsauswahl zu bekommen. Dies funktioniert die meiste Zeit, solange Sie den Speicherort für die Anwendung manuell aktiviert haben. Das Warnsymbol nicht zu bekommen scheint Sie auf der Stelle zu drehen, wie es sollte, es gibt auch zufällig den folgenden Fehler:Android GPS-Anwendung manchmal Absturz
D/AndroidRuntime: Shutting down VM
--------- beginning of crash E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.curtisboylan.myapplication, PID: 2443 java.lang.NullPointerException: Attempt to invoke virtual method 'double android.location.Location.getLatitude()' on anull object reference at com.example.curtisboylan.myapplication.SearchScreen.onLocationChanged(SearchScreen.java:391) at com.google.android.gms.location.internal.zzk$zzb.handleMessage(Unknown Source) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6119) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) Application terminated.
ich den Code unten angehängt werden können:
public class SearchScreen extends Fragment implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener {
public final static String EXTRA_MESSAGE = "com.example.curtisboylan.myapplication";
private GoogleApiClient client;
private GridViewAdapter mAdapter;
private ArrayList<String> listType;
private ArrayList<Integer> listIcon;
private String repairtype;
private GridView gridView;
private TextView tv;
private Button contBtn;
private Button googleLocBtn;
private Button gpsBtn;
private boolean setGPSloc = false;
private Location mLocation;
private LocationManager locationManager;
private long UPDATE_INTERVAL = 2 * 1000; /* 10 secs */
private long FASTEST_INTERVAL = 2000;
private LocationRequest mLocationRequest;
private com.google.android.gms.location.LocationListener listener;
private TextView mLatitudeTextView;
private TextView mLongitudeTextView;
private TextView tv2;
Double longitude;
Double latitude;
public static SearchScreen newInstance(){
SearchScreen fragment = new SearchScreen();
return fragment;
}
public SearchScreen(){}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
client = new GoogleApiClient.Builder(this.getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
checkLocation();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.activity_main, container, false);
tv = (TextView) view.findViewById(R.id.textView);
prepareList();
repairtype ="";
text = (TextView) view.findViewById(R.id.txt_TextDateTime);
btn_date = (Button) view.findViewById(R.id.btn_datePicker);
btn_date.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
updateDate();
}
});
contBtn = (Button) view.findViewById(R.id.button);
contBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), TechnicianListView.class);
intent.putExtra("message", repairtype);
startActivity(intent);
}
});
gpsBtn = (Button) view.findViewById(R.id.button3);
gpsBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tv2.setText("" + getMyPosAddress(mLocation.getLatitude(), mLocation.getLongitude()));
}
});
tv2 = (TextView) view.findViewById((R.id.textView));
updateTextLabel();
// prepared arraylist and passed it to the Adapter class
mAdapter = new GridViewAdapter(getActivity(), listType, listIcon);
// Set custom adapter to gridview
gridView = (GridView) view.findViewById(R.id.gridView1);
gridView.setAdapter(mAdapter);
// Implement On Item click listener
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
Toast.makeText(getActivity(), "DEBUG " + mAdapter.getItem(position), Toast.LENGTH_SHORT).show();
repairtype = mAdapter.getItem(position);
}
});
googleLocBtn = (Button) view.findViewById(R.id.googleLocBtn);
googleLocBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
findPlace(v.findViewById(android.R.id.content));
}
});
return view;
}
//Calling method DateFormat and Calendar
DateFormat formatDateTime = DateFormat.getDateInstance();
Calendar dateTime = Calendar.getInstance();
//Creating Vars
private TextView text;
private Button btn_date;
private void updateDate() {
new DatePickerDialog(getActivity(), d, dateTime.get(Calendar.YEAR), dateTime.get(Calendar.MONTH), dateTime.get(Calendar.DAY_OF_MONTH)).show();
}
DatePickerDialog.OnDateSetListener d = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
dateTime.set(Calendar.YEAR, year);
dateTime.set(Calendar.MONTH, monthOfYear);
dateTime.set(Calendar.DAY_OF_MONTH, dayOfMonth);
updateTextLabel();
}
};
private void updateTextLabel() {
text.setText(formatDateTime.format(dateTime.getTime()));
}
public void prepareList() {
listType = new ArrayList<String>();
listType.add("di1");
listType.add("screen1");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listType.add("placeholder");
listIcon = new ArrayList<Integer>();
listIcon.add(R.drawable.camerabrokenicon);
listIcon.add(R.drawable.screenrepairicon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
listIcon.add(R.drawable.placeholdericon);
}
public void testBtn(View v) {
// tv.setText("Welcome");
}
public void findPlace(View v) {
try {
Intent intent =
new PlaceAutocomplete
.IntentBuilder(PlaceAutocomplete.MODE_FULLSCREEN)
.build(getActivity());
startActivityForResult(intent, 1);
} catch (GooglePlayServicesRepairableException e) {
// TODO: Handle the error.
} catch (GooglePlayServicesNotAvailableException e) {
// TODO: Handle the error.
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if (resultCode == RESULT_OK) {
Place place = PlaceAutocomplete.getPlace(this.getContext(), data);
Log.e("Tag", "Place: " + place.getAddress() + place.getPhoneNumber());
((TextView) getView().findViewById(R.id.textView))
.setText("" + place.getName());
} else if (resultCode == PlaceAutocomplete.RESULT_ERROR) {
} else if (resultCode == RESULT_CANCELED) {
}
}
}
@Override
public void onStart() {
super.onStart();
super.onStart();
if (client != null) {
client.connect();
}
}
@Override
public void onStop() {
super.onStop();
client.disconnect();
}
private String getMyPosAddress(double dbLat, double dbLon) {
String addressString = "No address found";
Geocoder gc = new Geocoder(getContext(), Locale.getDefault());
try {
List<android.location.Address> gclist ;
gclist = gc.getFromLocation(dbLat, dbLon, 1);
if (gclist.size() > 0) {
android.location.Address address = gclist.get(0);
addressString = "" + address.getAddressLine(0) + ", " + address.getAdminArea();
}
} catch (IOException e) {
e.printStackTrace();
}
return addressString;
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
} startLocationUpdates();
mLocation = LocationServices.FusedLocationApi.getLastLocation(client);
if(mLocation == null){
startLocationUpdates();
}
if (mLocation != null) {
latitude = mLocation.getLatitude();
longitude = mLocation.getLongitude();
} else {
}
}
protected void startLocationUpdates() {
// Create the location request
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
// Request location updates
if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(client,
mLocationRequest, this);
Log.d("reque", "--->>>>");
}
@Override
public void onConnectionSuspended(int i) {
Log.i(TAG, "Connection Suspended");
client.connect();
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Log.i(TAG, "Connection failed. Error: " + connectionResult.getErrorCode());
}
@Override
public void onLocationChanged(Location location) {
String msg = "Updated Location: " +
Double.toString(location.getLatitude()) + "," +
Double.toString(location.getLongitude());
latitude = mLocation.getLatitude();
longitude = mLocation.getLongitude();
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
}
private boolean checkLocation() {
if(!isLocationEnabled())
showAlert();
return isLocationEnabled();
}
private void showAlert() {
final AlertDialog.Builder dialog = new AlertDialog.Builder(getContext());
dialog.setTitle("Enable Location")
.setMessage("Your Locations Settings is set to 'Off'.\nPlease Enable Location to " +
"use this app")
.setPositiveButton("Location Settings", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface paramDialogInterface, int paramInt) {
Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(myIntent);
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface paramDialogInterface, int paramInt) {
}
});
dialog.show();
}
private boolean isLocationEnabled() {
locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) ||
locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
}
}
Es ist immer noch nicht wirklich beantworten, warum es nicht, mich für meine Lage nicht fragen, ob es nicht schon eingeschaltet, was der Code tun soll –