CODEWITHSUNDEEP
javaandroid
JMeehan1
JMeehan1

Reputation: 49

Using a variable value from one method in different one in Android Studio

Firstly sorry for asking so many questions here the past couple of weeks, I'm new to android studio and finding it tough to figure out a lot of the core concepts by myself. In regards to the question, I have a project set up so whatever you type into the "1.2, -1.2" ect parameters you will find you the distance between two places and your answer will be displayed as a toast. However, I want the latitudes and longitueds to be variables.

Button button1=(Button) findViewById(R.id.button1);
        button1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Double distance = 1.0;
                int val = 1;

                Toast.makeText(getApplicationContext(), "You are "     + String.valueOf(distance
                        (1.2, -1.2, 1.3, -2.4, "K")) + "kilometers away     from the flag", Toast.LENGTH_LONG).show(); }
        });

I have the following two methods and I want the values LatLng and currentLatitude and currentLongitude doubles for the parameters above.

    private void setUpMap() { 
mMap.addMarker(new MarkerOptions().position(new LatLng(53.3835,6.5996)).title("Marker"));         
}

and

private void handleNewLocation(Location location) {
        Log.d(TAG, location.toString());

        double currentLatitude = location.getLatitude();
        double currentLongitude = location.getLongitude();

        LatLng latLng = new LatLng(currentLatitude,     currentLongitude);

        //mMap.addMarker(new MarkerOptions().position(new     LatLng(currentLatitude, currentLongitude)).title("Current     Location"));
        MarkerOptions options = new MarkerOptions()
                .position(latLng)
                .title("I am here!");
        mMap.addMarker(options);
          mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
    }

Any insight on how to do it would be much appreciated. From what I've read I know I'll need to split the LatLng variable into strings but thats all I can think of so far

Upvotes: 1

Views: 4089

Answers (1)

vlatkozelka
vlatkozelka

Reputation: 999

If those 2 methods are in the same class then just make those 2 variables attributes of that class, else you will need to pass them to the corresponding classes. I will demonstrate in a simpler example than your code :

public class MyClass(){

    private int lat;
    private int longt;

//constructors ,setters and getters

    public void method1(){

//affecting those attributes with values
        lat = 1;
        longt = 2;

    }

    public void method2(){

        //simply access the attributes
        System.out.println("lat "+lat+"  longt  "+longt);

    }


}

Reading the comments , I think I need to further explain to you that when a variable is declared inside a method, it is local to that method, and therefor it will be "destroyed" (garbage collected or w.e) when that method is done doing it's job. But when a variable is declared outside a method, like the class's attributes, you can still refer to it whenever you need to, until the instance of that class is "destroyed".

Upvotes: 2

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