我收到以下错误：java.lang.NullPointerException：尝试调用虚方法＆＃39; double android.location.Location.getLatitude（）＆＃39;在空对象引用上
这是Logcat
java.lang.NullPointerException：尝试调用虚方法＆＃39; double android.location.Location.getLatitude（）＆＃39;在空对象引用上
at com.example.shibli.luxuryrider.Home.requestPickupHere(Home.java:338)
at com.example.shibli.luxuryrider.Home.access$000(Home.java:96)
at com.example.shibli.luxuryrider.Home$2.onClick(Home.java:217)
at android.view.View.performClick(View.java:4848)
at android.view.View$PerformClick.run(View.java:20300)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5682)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:963)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758)
这个代码..请帮忙
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mService = Common.getFCMService();
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);
//init storage
storage = FirebaseStorage.getInstance();
storageReference = storage.getReference();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
View navigationHeaderView = navigationView.getHeaderView(0);
txtRiderName = navigationHeaderView.findViewById(R.id.txtRiderName);
txtRiderName.setText(String.format("%s", Common.currentUser.getName()));
txtStars = navigationHeaderView.findViewById(R.id.txtStars);
txtStars.setText(String.format("%s", Common.currentUser.getRates()));
imageAvatar = navigationHeaderView.findViewById(R.id.imageAvatar);
//Load avatar
if (Common.currentUser.getAvatarUrl() != null && !TextUtils.isEmpty(Common.currentUser.getAvatarUrl())) {
Picasso.with(this)
.load(Common.currentUser.getAvatarUrl())
.into(imageAvatar);
}
//Maps
mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
//Geo Fire
ref = FirebaseDatabase.getInstance().getReference("Drivers");
geoFire = new GeoFire(ref);
//init View
imgExpandable = (ImageView)findViewById(R.id.imgExpandable);
mBottomSheet = BottomSheetRiderFragment.newInstance("Rider bottom sheet");
imgExpandable.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mBottomSheet.show(getSupportFragmentManager(),mBottomSheet.getTag());
}
});
btnPickupRequest = (Button) findViewById(R.id.btnPickupRequest);
btnPickupRequest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!Common.isDriverFound)
requestPickupHere(FirebaseAuth.getInstance().getCurrentUser().getUid());
else
sendRequestToDriver(Common.driverId);
}
});
place_destination = (PlaceAutocompleteFragment) getFragmentManager().findFragmentById(R.id.place_destination);
place_location = (PlaceAutocompleteFragment) getFragmentManager().findFragmentById(R.id.place_location);
typeFilter = new AutocompleteFilter.Builder()
.setTypeFilter(AutocompleteFilter.TYPE_FILTER_ADDRESS)
.setTypeFilter(3)
.build();
//Event
place_location.setOnPlaceSelectedListener(new PlaceSelectionListener() {
@Override
public void onPlaceSelected(Place place) {
mPlaceLocation = place.getAddress().toString();
//Remove Old Marker
mMap.clear();
//Add Marker at New Location
mUserMarker = mMap.addMarker(new MarkerOptions().position(place.getLatLng())
.icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
.title("Pickup Here"));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(place.getLatLng(), 15.0f));
}
@Override
public void onError(Status status) {
}
});
place_destination.setOnPlaceSelectedListener(new PlaceSelectionListener() {
@Override
public void onPlaceSelected(Place place) {
mPlaceDestination = place.getAddress().toString();
//Add New destination Marker
mMap.addMarker(new MarkerOptions()
.position(place.getLatLng())
.icon(BitmapDescriptorFactory.fromResource(R.drawable.destination_marker))
.title("Destination"));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(place.getLatLng(), 15.0f));
// Show information in bottom
BottomSheetRiderFragment mBottomsheet = BottomSheetRiderFragment.newInstance(mPlaceLocation);
mBottomsheet.show(getSupportFragmentManager(), mBottomsheet.getTag());
}
@Override
public void onError(Status status) {
}
});
setUpLocation();
updateFirebaseToken();
}
private void updateFirebaseToken() {
FirebaseDatabase db = FirebaseDatabase.getInstance();
DatabaseReference tokens = db.getReference(Common.token_tb1);
Token token = new Token(FirebaseInstanceId.getInstance().getToken());
tokens.child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.setValue(token);
}
private void sendRequestToDriver(String driverId) {
DatabaseReference tokens = FirebaseDatabase.getInstance().getReference(Common.token_tb1);
tokens.orderByKey().equalTo(driverId)
.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot postSnapShot : dataSnapshot.getChildren()) {
Token token = postSnapShot.getValue(Token.class);
//Make raw payload
String json_lat_lng = new Gson().toJson(new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude()));
String riderToken = FirebaseInstanceId.getInstance().getToken();
Notification data = new Notification(riderToken, json_lat_lng);
Sender content = new Sender(token.getToken(), data);
mService.sendMessage(content)
.enqueue(new Callback<FCMResponse>() {
@Override
public void onResponse(Call<FCMResponse> call, Response<FCMResponse> response) {
if (response.body().success == 1)
Toast.makeText(Home.this, "Request sent", Toast.LENGTH_SHORT).show();
else
Toast.makeText(Home.this, "Failed", Toast.LENGTH_SHORT).show();
}
@Override
public void onFailure(Call<FCMResponse> call, Throwable t) {
Log.e("ERROR", t.getMessage());
}
});
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void requestPickupHere(String uid) {
DatabaseReference dbRequest = FirebaseDatabase.getInstance().getReference(Common.pickup_request_tb1);
GeoFire mGeoFire = new GeoFire(dbRequest);
mGeoFire.setLocation(uid, new GeoLocation(mLastLocation.getLatitude(), mLastLocation.getLongitude()));
if (mUserMarker.isVisible())
mUserMarker.remove();
//Add new Marker
mUserMarker = mMap.addMarker(new MarkerOptions()
.title("Pickup Here")
.snippet("")
.position(new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude()))
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
mUserMarker.showInfoWindow();
btnPickupRequest.setText("Getting your Driver...");
findDriver();
}
private void findDriver() {
final DatabaseReference drivers = FirebaseDatabase.getInstance().getReference(Common.driver_tb1);
GeoFire gfDrivers = new GeoFire(drivers);
final GeoQuery geoQuery = gfDrivers.queryAtLocation(new GeoLocation(mLastLocation.getLatitude(), mLastLocation.getLongitude()), radius);
geoQuery.removeAllListeners();
geoQuery.addGeoQueryEventListener(new GeoQueryEventListener() {
@Override
public void onKeyEntered(String key, GeoLocation location) {
// if found
if (!Common.isDriverFound) {
Common.isDriverFound = true;
Common.driverId = key;
btnPickupRequest.setText("CALL DRIVER");
Toast.makeText(Home.this, ""+key, Toast.LENGTH_SHORT).show();
}
}
@Override
public void onKeyExited(String key) {
}
@Override
public void onKeyMoved(String key, GeoLocation location) {
}
@Override
public void onGeoQueryReady() {
//if still not found driver , increase distance
if (!Common.isDriverFound && radius < LIMIT) {
radius++;
findDriver();
} else {
if (!Common.isDriverFound) {
Toast.makeText(Home.this, "No available any driver near you", Toast.LENGTH_SHORT).show();
btnPickupRequest.setText("REQUEST PICKUP");
geoQuery.removeAllListeners();
}
}
}
@Override
public void onGeoQueryError(DatabaseError error) {
}
});
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case MY_PERMISSION_REQUEST_CODE:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
setUpLocation();
}
break;
}
}
private void setUpLocation() {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
//Request runtime permission
ActivityCompat.requestPermissions(this, new String[]{
android.Manifest.permission.ACCESS_COARSE_LOCATION,
android.Manifest.permission.ACCESS_FINE_LOCATION
}, MY_PERMISSION_REQUEST_CODE);
} else {
buildLocationCallBack();
createLocationRequest();
displayLocation();
}
}
private void buildLocationCallBack() {
locationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
Common.mLastLocation = locationResult.getLocations().get(locationResult.getLocations().size() - 1);
displayLocation();
}
};
}
private void displayLocation() {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
fusedLocationProviderClient.getLastLocation().addOnSuccessListener(new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
Common.mLastLocation = location;
if (Common.mLastLocation != null) {
LatLng center = new LatLng(Common.mLastLocation.getLatitude(), Common.mLastLocation.getLongitude());
LatLng northSide = SphericalUtil.computeOffset(center, 100000, 0);
LatLng southSide = SphericalUtil.computeOffset(center, 100000, 180);
LatLngBounds bounds = LatLngBounds.builder()
.include(northSide)
.include(southSide)
.build();
place_location.setBoundsBias(bounds);
place_location.setFilter(typeFilter);
place_destination.setBoundsBias(bounds);
place_location.setFilter(typeFilter);
driversAvailable = FirebaseDatabase.getInstance().getReference(Common.driver_tb1);
driversAvailable.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
LoadAllAvailableDriver(new LatLng(Common.mLastLocation.getLatitude(), Common.mLastLocation.getLongitude()));
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
final double latitude = Common.mLastLocation.getLatitude();
final double longitude = Common.mLastLocation.getLongitude();
LoadAllAvailableDriver(new LatLng(Common.mLastLocation.getLatitude(), Common.mLastLocation.getLongitude()));
Log.d("EDMTDEV", String.format("Your location was changed: %f / %f", latitude, longitude));
} else {
Log.d("ERROR", "Cannot get your location");
}
}
});
}
private void LoadAllAvailableDriver(final LatLng location) {
//Add Marker
mMap.clear();
mUserMarker = mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
.position(location)
.title("You'r Location"));
//Move Camera to this position
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(location, 15.0f));
//Load all available Driver in distance 3km
DatabaseReference driverLocation = FirebaseDatabase.getInstance().getReference(Common.driver_tb1);
GeoFire gf = new GeoFire(driverLocation);
GeoQuery geoQuery = gf.queryAtLocation(new GeoLocation(location.latitude, location.longitude), distance);
geoQuery.removeAllListeners();
geoQuery.addGeoQueryEventListener(new GeoQueryEventListener() {
@Override
public void onKeyEntered(String key, final GeoLocation location) {
FirebaseDatabase.getInstance().getReference(Common.user_driver_tb1)
.child(key)
.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
Rider rider = dataSnapshot.getValue(Rider.class);
//Add Driver to map
mMap.addMarker(new MarkerOptions()
.position(new LatLng(location.latitude, location.longitude))
.flat(true)
.title(rider.getName())
.snippet("Phone : "+rider.getPhone())
.icon(BitmapDescriptorFactory.fromResource(R.drawable.car)));
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
@Override
public void onKeyExited(String key) {
}
@Override
public void onKeyMoved(String key, GeoLocation location) {
}
@Override
public void onGeoQueryReady() {
if (distance <= LIMIT) // distance just find for 3 km
{
distance++;
LoadAllAvailableDriver(location);
}
}
@Override
public void onGeoQueryError(DatabaseError error) {
}
});
}
private void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FATEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setSmallestDisplacement(DISPLACEMENT);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_signOut) {
signout();
} else if (id == R.id.nav_updateInformation) {
showUpdateInformationDialog();
}
return true;
}
private void showUpdateInformationDialog() {
AlertDialog.Builder alertdialog = new AlertDialog.Builder(Home.this);
alertdialog.setTitle("Update Information");
alertdialog.setMessage("Please Enter Your New data");
LayoutInflater inflater = this.getLayoutInflater();
View update_info_layout = inflater.inflate(R.layout.layout_update_information, null);
final MaterialEditText edtName = update_info_layout.findViewById(R.id.edtName);
final MaterialEditText edtPhone = update_info_layout.findViewById(R.id.edtPhone);
final ImageView imgAvatar = update_info_layout.findViewById(R.id.imgAvatar);
alertdialog.setView(update_info_layout);
imgAvatar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
chooseImageAndUpload();
}
});
alertdialog.setView(update_info_layout);
//set Button
alertdialog.setPositiveButton("UPDATE", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
final android.app.AlertDialog waitingDialog = new SpotsDialog(Home.this);
waitingDialog.show();
String name = edtName.getText().toString();
String phone = edtPhone.getText().toString();
Map<String, Object> update = new HashMap<>();
if (!TextUtils.isEmpty(name))
update.put("name", name);
if (!TextUtils.isEmpty(phone))
update.put("phone", phone);
//update
DatabaseReference riderInformation = FirebaseDatabase.getInstance().getReference(Common.user_rider_tb1);
riderInformation.child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.updateChildren(update).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
waitingDialog.dismiss();
if (task.isSuccessful())
Toast.makeText(Home.this, "Information Updated", Toast.LENGTH_SHORT).show();
else
Toast.makeText(Home.this, "Information Not Update", Toast.LENGTH_SHORT).show();
}
});
}
});
alertdialog.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
//show Dialog
alertdialog.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == Common.PICK_IMAGE_RECUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri saveUri = data.getData();
if (saveUri != null) {
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Uploading...");
progressDialog.show();
String imageName = UUID.randomUUID().toString();
final StorageReference imageFolder = storageReference.child("images/" + imageName);
imageFolder.putFile(saveUri)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
progressDialog.dismiss();
imageFolder.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
Map<String, Object> update = new HashMap<>();
update.put("avatarUrl", uri.toString());
DatabaseReference riderInformation = FirebaseDatabase.getInstance().getReference(Common.user_rider_tb1);
riderInformation.child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.updateChildren(update).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful())
Toast.makeText(Home.this, "Avatar Was Upoload", Toast.LENGTH_SHORT).show();
else
Toast.makeText(Home.this, "Avatar Not Update", Toast.LENGTH_SHORT).show();
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(Home.this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
});
}
})
.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
progressDialog.setMessage("Uploaded" + progress + "%");
}
});
}
}
}
private void chooseImageAndUpload() {
//start intent to chose image
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), Common.PICK_IMAGE_RECUEST);
}
@Override
public void onMapReady(GoogleMap googleMap) {
try {
boolean isSuccess = googleMap.setMapStyle(
MapStyleOptions.loadRawResourceStyle(this, R.raw.uber_style_map)
);
if (!isSuccess)
Log.e("ERROR", "Map Style Load Failed !!!");
} catch (Resources.NotFoundException ex) {
ex.printStackTrace();
}
mMap = googleMap;
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.getUiSettings().setZoomGesturesEnabled(true);
mMap.setInfoWindowAdapter(new CustomInfoWindow(this));
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(LatLng latLng) {
if (markerDestination != null)
markerDestination.remove();
markerDestination = mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.destination_marker))
.position(latLng)
.title("Destination"));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15.0f));
BottomSheetRiderFragment mBottomsheet = BottomSheetRiderFragment.newInstance(String.format("%f,%f", mLastLocation.getLatitude(), mLastLocation.getLongitude())
);
mBottomsheet.show(getSupportFragmentManager(), mBottomsheet.getTag());
}
});
if (ActivityCompat.checkSelfPermission(Home.this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(Home.this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
fusedLocationProviderClient.requestLocationUpdates(mLocationRequest, locationCallback, Looper.myLooper());
}
}
答案 0 :(得分：0)
解决方案就是这样
在sendRequestToDriver(String driverId)
更改：
此：Token token = postSnapShot.getValue(Token.class);
为此：Token token = new Token(postSnapShot.getValue(String.class));