我必须实现一个功能,使用所有可用传感器之一(例如wifi、gps、数据ecc)返回用户的当前地理位置。
我查找了有关它的信息,找到了几个解决方案,目前我感兴趣的是“融合位置”的使用,但我没有找到使用指南或完整的示例。
这是我当前使用的代码:
public class LocationService extends Service {
private FusedLocationProviderClient mFusedLocationClient;
private SettingsClient mSettingsClient;
private LocationRequest mLocationRequest;
private LocationSettingsRequest mLocationSettingsRequest;
private LocationCallback mLocationCallback;
private Location mCurrentLocation;
private Boolean mRequestingLocationUpdates;
private WriteInLogFile wil = new WriteInLogFile();
@Override
public void onCreate() {
try {
DbGest db = DbGest.getInstance(getApplicationContext());
String deviceType = db.getSetting("deviceType");
long updateInterval;
if (deviceType.compareToIgnoreCase("smartphone") == 0) {
updateInterval = Long.parseLong(db.getSetting("pollGPSPhone"));
} else {
updateInterval = Long.parseLong(db.getSetting("pollGPSTablet"));
}
long updateInMillisecond = updateInterval / 2;
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(updateInterval);
mLocationRequest.setFastestInterval(updateInMillisecond);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mRequestingLocationUpdates = false;
mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
mSettingsClient = LocationServices.getSettingsClient(this);
mLocationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
super.onLocationResult(locationResult);
mCurrentLocation = locationResult.getLastLocation();
updateLocation();
}
};
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
builder.setNeedBle(true);
mLocationSettingsRequest = builder.build();
startLocationUpdates();
} catch (Exception e) {
wil.WriteFile("1)LocationService - Exception: " + e.toString());
}
}
public void startLocationUpdates() {
if (!mRequestingLocationUpdates) {
mRequestingLocationUpdates = true;
mSettingsClient.checkLocationSettings(mLocationSettingsRequest).addOnSuccessListener(new OnSuccessListener<LocationSettingsResponse>() {
@Override
public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
mFusedLocationClient.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.myLooper());
}
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
wil.WriteFile("2)LocationService - Exception: " + e.toString());
}
});
}
}
private void stopLocationUpdates() {
if (!mRequestingLocationUpdates) {
return;
}
mFusedLocationClient.removeLocationUpdates(mLocationCallback).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
mRequestingLocationUpdates = false;
}
});
}
private void updateLocation() {
if (mCurrentLocation != null) {
DbGest.getInstance(getApplicationContext()).insertIntoLastPositionKnown(mCurrentLocation, getApplicationContext());
}
}
@Override
public void onDestroy() {
super.onDestroy();
stopLocationUpdates();
}
@Override
public IBinder onBind(Intent intent) {
return null;
} }
如果我通过Wi-Fi连接到网络,则代码可以正常工作。在这种情况下,所有代码都可以正常工作,但当我切换到3g时,会出现错误:
通用域名格式。谷歌。安卓gms。常见的应用程序编程接口。ResolvableApiException:6:
需要分辨率\u
在gradle:
compile 'com.google.android.gms:play-services-gcm:11.6.2'
compile 'com.google.android.gms:play-services-vision:11.6.2'
compile 'com.google.android.gms:play-services-location:11.6.2'
compile 'com.google.android.gms:play-services-maps:11.6.2'
我不知道如何解决这个问题。。。