我正在尝试获取当前位置，但它没有使用真实设备但是在模拟器上工作
这是我的错误---＆gt;
处理：in.co.getonlinerecharge.cab.bw_driver，PID：28061 java.lang.NullPointerException：尝试调用虚方法＆＃39; boolean java.lang.String.isEmpty（）＆＃39;在null对象引用上 在in.co.getonlinerecharge.cab.bw_driver.activity.HomeActivity.Send_Data_Fragment（HomeActivity.java:143） 在in.co.getonlinerecharge.cab.bw_driver.activity.HomeActivity.onNavigationItemSelected（HomeActivity.java:215）;
package in.co.getonlinerecharge.cab.bw_driver.activity;
import android.Manifest;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.IntentSender;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.BottomNavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.location.LocationSettingsRequest;
import com.google.android.gms.location.LocationSettingsResult;
import com.google.android.gms.location.LocationSettingsStates;
import com.google.android.gms.location.LocationSettingsStatusCodes;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import in.co.getonlinerecharge.cab.bw_driver.AppController;
import in.co.getonlinerecharge.cab.bw_driver.R;
import in.co.getonlinerecharge.cab.bw_driver.fragment.EarningFragment;
import in.co.getonlinerecharge.cab.bw_driver.fragment.HomeFragment;
import in.co.getonlinerecharge.cab.bw_driver.fragment.ProfileFragment;
import in.co.getonlinerecharge.cab.bw_driver.fragment.RatingFragment;
import in.co.getonlinerecharge.cab.bw_driver.helper.ToastHelper;
import in.co.getonlinerecharge.cab.bw_driver.utils.Constans;
import in.co.getonlinerecharge.cab.bw_driver.utils.Utils;
import okhttp3.ResponseBody;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
public class HomeActivity extends AppCompatActivity implements BottomNavigationView.OnNavigationItemSelectedListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
private BottomNavigationView bottomNavigation;
private Switch switch1;
private TextView txt_on_off;
private Toolbar toolbar;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
LocationRequest mLocationRequest;
double slat, slong;
String add;
Geocoder geocoder;
List<Address> addresses = null;
String address = "", city = "", state = "", country = "", postalCode = "", knownName = "";
//double clat,clang;
String pincode, location, calt, clong;
protected LocationManager locationManager;
protected LocationListener locationListener;
protected Context context;
View.OnClickListener mOnClickListener;
private FragmentManager fragmentManager = getSupportFragmentManager();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
bottomNavigation = (BottomNavigationView) findViewById(R.id.bottom_navigation);
bottomNavigation.inflateMenu(R.menu.bottom_menu);
bottomNavigation.setOnNavigationItemSelectedListener(this);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
switch1 = (Switch) toolbar.findViewById(R.id.switch1);
txt_on_off = (TextView) toolbar.findViewById(R.id.txt_on_off);
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
if (mGoogleApiClient != null) {
mGoogleApiClient.connect();
} else {
Toast.makeText(this, "Not Connected!", Toast.LENGTH_SHORT).show();
}
switch1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean ischacked) {
if (!ischacked) {
txt_on_off.setText("OFF");
Snackbar.make(findViewById(android.R.id.content), "You need to turn on first", Snackbar.LENGTH_LONG)
.setAction("Undo", mOnClickListener)
.setActionTextColor(Color.RED)
.show();
} else {
txt_on_off.setText("ON");
Send_Data_Fragment();
Send_Location();
Timer timer = new Timer();
TimerTask hourlyTask = new TimerTask() {
@Override
public void run() {
Send_Location();
}
};
timer.schedule (hourlyTask, 0l, 1000*5*60);
}
}
});
}
private void Send_Data_Fragment() {
if (!calt.isEmpty() && !clong.isEmpty())
{
// HomeFragment fragment = new HomeFragment();
// Bundle bundle = new Bundle();
// bundle.putDouble("clat", Double.parseDouble(calt));
// bundle.putDouble("clong", Double.parseDouble(clong));
// fragment.setArguments(bundle);
// ToastHelper.make(getApplicationContext(), true, "data has been transferd");
Fragment fragment = new HomeFragment();//Get Fragment Instance
Bundle data = new Bundle();//Use bundle to pass data
data.putDouble("clat",Double.parseDouble(calt));
data.putDouble("clong",Double.parseDouble(clong));
//put string, int, etc in bundle with a key value
fragment.setArguments(data);
fragmentManager.beginTransaction().replace(R.id.main_container, fragment).commit();
}
else
{
ToastHelper.make(getApplicationContext(), true, "Please reconnect");
}
}
private void Send_Location() {
if (!pincode.isEmpty() && !location.isEmpty() && !calt.isEmpty() &&
!clong.isEmpty()) {
// final ProgressDialog progressDialog = new ProgressDialog(getApplicationContext());
// progressDialog.show();
// progressDialog.setMessage(getString(R.string.please_wait));
Call<ResponseBody> call = AppController.getInstance().getApiInterface().postLocation(Utils.getSharedPreference(getApplicationContext()).getString(Constans.PREFERENCE_DRIVER_UID, ""),
location, pincode, calt, clong);
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
// progressDialog.dismiss();
// ToastHelper.make(getApplicationContext(), true, pincode + " " + location + " " + calt + " " + clong);
String responseString = null;
try {
responseString = response.body().string();
JSONObject jsonObject = new JSONObject(responseString);
//ToastHelper.make(getApplicationContext(), true, jsonObject.getString("data"));
// if (jsonObject.getBoolean("status")) {
// ToastHelper.make(getApplicationContext(), true, jsonObject.getString("data"));
// }
Utils.getSharedPreference(getApplicationContext()).edit().putString(Constans.PREFERENCE_DRIVER_CLAT,calt);
Utils.getSharedPreference(getApplicationContext()).edit().putString(Constans.PREFERENCE_DRIVER_CLONG,clong);
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
ToastHelper.make(getApplicationContext(), true, "Please reconnect");
}
});
} else {
ToastHelper.make(getApplicationContext(), true, "Please reconnect");
}
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
int id = item.getItemId();
switch (id) {
case R.id.btm_action_home:
//Utils.replaceFragment(new HomeFragment(), HomeFragment.class.getName(), false, true, getSupportFragmentManager(), R.id.main_container);
Send_Data_Fragment();
break;
case R.id.btm_action_earning:
Utils.replaceFragment(new EarningFragment(), EarningFragment.class.getName(), false, true, getSupportFragmentManager(), R.id.main_container);
break;
case R.id.btm_action_ratings:
Utils.replaceFragment(new RatingFragment(), RatingFragment.class.getName(), false, true, getSupportFragmentManager(), R.id.main_container);
break;
case R.id.btm_action_account:
Utils.replaceFragment(new ProfileFragment(), ProfileFragment.class.getName(), false, true, getSupportFragmentManager(), R.id.main_container);
break;
}
return true;
}
@Override
protected void onStart() {
mGoogleApiClient.connect();
super.onStart();
}
@Override
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
settingRequest();
}
@Override
public void onConnectionSuspended(int i) {
Toast.makeText(this, "Connection Suspended!", Toast.LENGTH_SHORT).show();
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Toast.makeText(this, "Connection Failed!", Toast.LENGTH_SHORT).show();
if (connectionResult.hasResolution()) {
try {
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(this, 90000);
} catch (IntentSender.SendIntentException e) {
e.printStackTrace();
}
} else {
Log.i("Current Location", "Location services connection failed with code " + connectionResult.getErrorCode());
}
}
private void settingRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(10000); // 10 seconds, in milliseconds
mLocationRequest.setFastestInterval(1000); // 1 second, in milliseconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(mLocationRequest);
PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient,
builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(@NonNull LocationSettingsResult result) {
final Status status = result.getStatus();
final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
// All location settings are satisfied. The client can
// initialize location requests here.
getLocation();
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied, but this can be fixed
// by showing the user a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(HomeActivity.this, 1000);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way
// to fix the settings so we won't show the dialog.
break;
}
}
});
}
private void getLocation() {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
} else {
/*Getting the location after aquiring location service*/
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
//
_progressBar.setVisibility(View.INVISIBLE);
// _latitude.setText("Latitude: " + String.valueOf(mLastLocation.getLatitude()));
// _longitude.setText("Longitude: " + String.valueOf(mLastLocation.getLongitude()));
//ToastHelper.make(this,true,mLastLocation.getLatitude()+" "+mLastLocation.getLongitude());
Geocoder geocoder = new Geocoder(getApplicationContext());
String Addr=null;
try
{
List<Address> addresses = geocoder.getFromLocation(mLastLocation.getLatitude(), mLastLocation.getLongitude(), 1);
Address obj = addresses.get(0);
add = obj.getAddressLine(0);
String currentAddress = obj.getSubAdminArea() + ","
+ obj.getAdminArea();
double latitude = obj.getLatitude();
double longitude = obj.getLongitude();
String currentCity= obj.getSubAdminArea();
String currentState= obj.getAdminArea();
add = add + "\n" + obj.getCountryName();
add = add + "\n" + obj.getCountryCode();
add = add + "\n" + obj.getAdminArea();
add = add + "\n" + obj.getPostalCode();
add = add + "\n" + obj.getSubAdminArea();
add = add + "\n" + obj.getLocality();
add = add + "\n" + obj.getSubThoroughfare();
pincode = obj.getPostalCode();
location = obj.getAdminArea()+" "+obj.getSubAdminArea()+" "+obj.getLocality();
calt = String.valueOf(mLastLocation.getLatitude());
clong = String.valueOf(mLastLocation.getLongitude());
// ToastHelper.make(getApplicationContext(),true,obj.getSubAdminArea() + ","
// + obj.getAdminArea());
} catch (IOException e) {
e.printStackTrace();
}
} else {
/*if there is no last known location. Which means the device has no data for the loction currently.
* So we will get the current location.
* For this we'll implement Location Listener and override onLocationChanged*/
Log.i("Current Location", "No data for location found");
if (!mGoogleApiClient.isConnected())
mGoogleApiClient.connect();
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, (LocationListener) HomeActivity.this);
}
}
}
@Override
public void onLocationChanged(Location location) {
if (location != null)
{
double slatg =location.getLatitude();
double slong = location.getLongitude();
// clat = slatg;
// clang = slong;
try {
addresses = geocoder.getFromLocation(slatg,slong, 1); // Here 1 represent max location result to returned, by documents it recommended 1 to 5
} catch (IOException e) {
e.printStackTrace();
}
address = addresses.get(0).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex()
city = addresses.get(0).getLocality();
state = addresses.get(0).getAdminArea();
country = addresses.get(0).getCountryName();
postalCode = addresses.get(0).getPostalCode();
knownName = addresses.get(0).getFeatureName();
//ToastHelper.make(getApplicationContext(),true,""+city);
}
try {
if (location != null)
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, (LocationListener) this);
} catch (Exception e) {
e.printStackTrace();
}
}
}
我在清单文件中使用了以下权限
<uses-permission android:name="in.co.getonlinerecharge.cab.bw_cab.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />