This my might be a stupid question, but how do you work with String Array?
I am trying to do something like this, but my app would crash upon launching.
String names [] = null ;
names[0]= "I am";
names[1]= "Ammar";
Toast.makeText(getApplicationContext(), names[1] , Toast.LENGTH_SHORT).show();
You have to create the array, just like any other array
String names[] = new String[size];
you should define array size.
String name[] = new String[2];
You can use :
String[] names = new String[2];
names[0] = "I am";
names[1]= "Ammar";
Toast.makeText(getApplicationContext(), names[1] , Toast.LENGTH_SHORT).show();
may be you are getting error because you have not allocated memory to string array. You have assigned null to the array that's why the application is crashing.
String[] names = { "I am", "Ammar" };
Array follows the concept of static allocation of memory so you must define how much memory or size you need before using it.
String[] names = new String[10];
Try replacing
String names [] = null ;
with
String names[] = new String[2];
This is a standard issue with Object Instantiation. If you're going to define a reference, you must either point it to an already existing object OR create a new reference to the object using the new keyword.
Ex:
[Class] x = new [Class]()
Where [Class] is the object you're wanting to instantiate/use.
Whenever an object reference is created and is not instantiated, that object will be initialized to null.
Ex:
[Class] x;
after this line, x will be null since it does not have a valid object reference (new or not).
