BearingTo, inconvertible types

[Shay]

Dim MyLocation, CarLocation as Location

MyLocation.BearingTo (CarLocation)

I wish to store the CarLocation in DB so when user click save, it will be saved on the DB, and when he open the app again, I can point to the car based on the saved location
but when I write this:
CarLocation = (Cursor1.GetString("CarLocation"))

getting these error:
Compiling code. 0.22
Generating R file. 0.00
Compiling generated Java code. Error
B4A line: 145
CarLocation = (Cursor1.GetString(\
javac 1.6.0_24
src\Barrier_Plus\Binyat\compasstask.java:591: inconvertible types
found : java.lang.String
required: android.location.Location
mostCurrent._carlocation.setObject((android.location.Location)((mostCurrent._cursor1.GetString("CarLocation"))));
^
1 error


how to overcome this?

 

[stevel05]

The SQL getstring() will treat the data stored in the DB as a string, which you are trying to assign to an object.

This could be a tricky one, as location is an object I don't know what is written to the database when you add it, it may be a representation of the object or just a pointer to it.

If you're lucky and the object is written then getblob may work.

If it's just the pointer then you will have to find a way to convert the object first.

I'm sure Erel will be able to give you a definitive answer.

Edit:

Having looked at the location object, it shouldn't be too much work to create a delimited string representation and store that, then recreate the object after reading.

 

[Erel]

As written above, when you store the Location object to the database as string it stores the string representation of this object which is not useful. You can try: Log(MyLocation) to see it.

Later you cannot convert this string to a location object. Instead you should write a small method that converts the location to a string and another method to convert the string to a location object.

 

[Shay]

what information is the bearingTo needs
meaning, do I need to save this entire data?

 

[stevel05]

Looking a the location object here, there are 7 fields that are read/writable, which are

Accuracy,Altitude.Bearing,Lattitude,Longitude,Speed and Time.

Of the rest, three are flags that state data exists. And the other Members are methods.

If you store these 7 fields you can recreate the Location object.

Edit: Sorry just reread your post. The bearing to is a method so there is nothing to store for that.

 

[Erel]

Only the Latitude and Longitude are required.

 

[Shay]

so why BearingTo require location and not just

MyLocation.BearingTo(CarLocation.latitude,CarLocation.longtitude)

 

[kickaha]

All you need to do is declare a Location object with the lat and long:

Dim L1 As Location
L1.Initialize2(CarLocation.latitude,CarLocation.longitude) 
MyLocation.BearingTo(L1)

 

[Shay]

Thanks it worked