How do you make a variable that can be used across the application. For example, in Swift, you can name it by:
var formattedPrice: String = rowData["date"] as String
defaults.setObject(rowData, forKey: "rowData")
and you can fetch it with:
var variable = defaults.dictionaryForKey("rowData") as? NSDictionary
How can this behavior be mimicked in android studio?
The example you provided looks very similar to SharedPreferences in Android. SharedPreferences allow you to store data and access said data globally within your application. Here is a simple code snippet that shows you how to save and recall an int. You can save the variable as follows:
SharedPreferences sharedPreferences = getSharedPreferences("your_preferences", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putInt("your_integer_key", yourIntegerValue);
editor.commit();
And then retrieve it anywhere in your application like so:
SharedPreferences sharedPreferences = getSharedPreferences("your_preferences", Activity.MODE_PRIVATE);
int myIntegerValue = sharedPreferences.getInt("your_integer_key", -1);
String by using the appropriate methods, i.e. .getString for SharedPreferences and .putString for SharedPreferences.Editor. Then you would simply call something like System.out.println(yourString). 2. SharedPreferences are stored in an XML file in the app data folder. 3. -1 is just a random value. for all the SharedPreferences .get methods you have to specify a default value to be returned in the event that the requested preference does not exist.