Pass longitude and Latitude with Intent to another class

Question

I am trying to pass the latitude and Longitude from the onLocationChanged in the MainActivity to another packagecom.route.provider classDataPrivider b

Answer 1

You can add the values directly into intent.

intent.putExtra(KEY, VALUE)

otherwise try using

args.putDouble(LON_KEY, pLong)
args.putDouble(LAT_KEY, pLat)

Answer 2

It looks like the problem is not with your code, but possibly with imports or your project setup.

I got this working in Android Studio by passing the the LatLng Object as Parcelable in an Intent between two Activities.

In my build.gradle:

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:26.0.1'
    compile 'com.google.android.gms:play-services-maps:12.0.0'
    compile 'com.google.android.gms:play-services-location:12.0.0'
}

In both Activities, use the following import:

import com.google.android.gms.maps.model.LatLng;

Here is the test code that worked for me:

MainActivity.java:

double pLong = -121.345678;
double pLat = 37.123456;

LatLng fromPostion = new LatLng(pLat, pLong);

Bundle args = new Bundle();
args.putParcelable("longLat_dataPrivider", fromPostion);

Intent i = new Intent(this, MapActivity.class);
i.putExtras(args);
startActivity(i);

MapActivity.java:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_activity2);

    Intent i = getIntent();

    LatLng ll = i.getParcelableExtra("longLat_dataPrivider");

    Log.d("Location", "location: " + ll.latitude + " " + ll.longitude);

}

Answer 3

LatLng cannot be passed like that (sadly).

EDIT: Daniel Nugent exposed and proved that indeed LatLng IS Parcelable. Therefor, it's solution is better than mine I must admit And I just learn something too.

I would suggest to save lat/lng values separately:

intent.putExtra("latitude", latLng.latitude);
intent.putExtra("longitude", latLng.longitude);

Then retrieve them like so:

final double latitude = getIntent().getDoubleExtra("latitude");
final double longitude = getIntent().getDoubleExtra("longitude");
final LatLng = new LatLng(latitude, longitude);