我正在开发一个 android 应用程序，它有一个广播接收器来广播来自某个数量的传入短信。如果消息来自该号码并且采用特定格式，则应用程序会回复用户当前的经度和纬度。
但是当生成回复消息时，位置总是变为空。我使用的是 GoogleApiClient 对象和 FusedLocationApi。
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(googleAPIClient);
总是返回 null 并且我的消息在经度和纬度的位置包含空值。这是当消息进来询问位置时由广播接收器调用的服务。
公共类ReplyWithLocationService 扩展服务实现GoogleApiClient.ConnectionCallbacks、GoogleApiClient.OnConnectionFailedList、LocationListener{
private BroadcastReceiver senderBroadcastReceiver, deliverBroadcastReceiver;
private String SENT = "SMS_SENT";
private String DELIVERED = "SMS_DELIVERED";
private String latitude, longitude;
private LocationRequest locationRequest;
private LocationManager locationManager;
private ConnectivityManager connectivityManager;
private GoogleApiClient googleAPIClient;
private boolean isConnected;
private Location mLastLocation;
private NetworkInfo activeNetwork;
private boolean isConnectedInternet;
private boolean connectivity = true;
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
setUpGoogleAPIClient();
setUpLocationRequest();
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
connectivityManager = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
senderBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
switch (getResultCode()) {
case Activity.RESULT_OK:
Toast.makeText(getBaseContext(), "SMS Sent", Toast.LENGTH_SHORT).show();
break;
case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
Toast.makeText(getBaseContext(), "Generic failure", Toast.LENGTH_SHORT).show();
break;
case SmsManager.RESULT_ERROR_NO_SERVICE:
Toast.makeText(getBaseContext(), "No service", Toast.LENGTH_SHORT).show();
break;
case SmsManager.RESULT_ERROR_NULL_PDU:
Toast.makeText(getBaseContext(), "Null PDU", Toast.LENGTH_SHORT).show();
break;
case SmsManager.RESULT_ERROR_RADIO_OFF:
Toast.makeText(getBaseContext(), "Radio off", Toast.LENGTH_SHORT).show();
break;
}
}
};
deliverBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
switch (getResultCode()) {
case Activity.RESULT_OK:
Toast.makeText(getBaseContext(), "SMS Delivered", Toast.LENGTH_SHORT).show();
break;
case Activity.RESULT_CANCELED:
Toast.makeText(getBaseContext(), "SMS not delivered", Toast.LENGTH_SHORT).show();
break;
}
}
};
registerReceiver(senderBroadcastReceiver, new IntentFilter(SENT));
registerReceiver(deliverBroadcastReceiver, new IntentFilter(DELIVERED));
//setUpGoogleAPIClient();
//setUpLocationRequest();
}
private void setUpGoogleAPIClient() {
Log.e("APIClient", String.valueOf(googleAPIClient));
if (googleAPIClient == null) {
this.googleAPIClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
}
Log.d("APIClient", String.valueOf(googleAPIClient));
}
private void setUpLocationRequest() {
locationRequest = LocationRequest.create().setInterval(1000).setFastestInterval(1000).setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
//setUpGoogleAPIClient();
activeNetwork = connectivityManager.getActiveNetworkInfo();
if (activeNetwork != null && activeNetwork.isConnectedOrConnecting()) {
isConnectedInternet = true;
}
connectivity = checkConnectivity();
if (connectivity) {
if (!googleAPIClient.isConnected() || !googleAPIClient.isConnecting()) {
googleAPIClient.connect();
Log.e("APICLient", "Connect");
}
if (googleAPIClient.isConnected()) {
isConnected = true;
Log.e("APICLient", "Connected");
}
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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 TODO;
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(googleAPIClient);
Log.d("LastLocation", String.valueOf(mLastLocation));
if (mLastLocation != null) {
latitude = String.valueOf(mLastLocation.getLatitude());
longitude = String.valueOf(mLastLocation.getLongitude());
Log.e("Latitude", latitude);
Log.e("Longitude", longitude);
mLastLocation = null;
}
} else {
TelephonyManager tm = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);
CellLocation cellLocation = tm.getCellLocation();
GsmCellLocation gsmLocation = (GsmCellLocation) cellLocation;
}
if (intent.getStringExtra("Pin1") != null && intent.getStringExtra("Pin2") != null) {
String pin1 = intent.getStringExtra("Pin1");
String pin2 = intent.getStringExtra("Pin2");
Log.e("PIN1", pin1);
Log.e("PIN2", pin2);
sendLocationSMS(pin1, pin2);
}
return START_STICKY;
}
private boolean checkConnectivity() {
if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) && !isConnectedInternet) {
connectivity = false;
} else if (!isConnectedInternet) {
connectivity = false;
} else if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
connectivity = false;
}
return connectivity;
}
private void sendLocationSMS(String pin1, String pin2) {
String message = "FIND Location:" + pin1 + ":" + latitude + ":" + longitude + ":" + pin2;
Log.e("LocationMessage", message);
String number = "77131";
PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, new Intent(SENT), 0);
PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0, new Intent(DELIVERED), 0);
SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(number, null, message, sentPI, deliveredPI);
}
@Override
public void onDestroy() {
super.onDestroy();
unregisterReceiver(senderBroadcastReceiver);
unregisterReceiver(deliverBroadcastReceiver);
googleAPIClient.disconnect();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
locationRequest = LocationRequest.create().setInterval(1000).setFastestInterval(1000).setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
Log.e("LocationRequest", String.valueOf(locationRequest));
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
}