Q- What is wrong with this method definition?
doSomething(){// Do something here}
A- No return type is declared. You do not have to return a value from a method, but its return type must be void in this case. This is what the method should look like:
void doSomething(){
// Do something here
}Q- What is wrong with the following method definition?
float getBalance(){
String customerName = "Linus Torvalds";
float balance = 429.66f;
return userName;
}A- The method returns a string (userName), but the signature states that it must return a float. With a method name like getBalance, this code is what was likely intended:
float getBalance(){
String customerName = "Linus Torvalds";
float balance = 429.66f;
return balance;
}Q- When do we call the onCreate method? Trick question alert!
A- We don't. Android decides when to call onCreate, as well as all the other methods that make up the life cycle of an Activity. We just override the ones that are useful...