Difference between revisions of "Android App"

Revision as of 23:30, 5 August 2019

lalfldfl fdldfldfd

lsdfldfl

public void method(int ald){

}

@@ Line 1: / Line 1: @@
-==Methods==
+==Adroid Programming==
-Methods are nothing but members of a class that provide a service for an object or perform some business logic.
+lalfldfl fdldfldfd
-===Method Overloading===
-Overloading: Multiple methods with the same name but different parameter lists.
-'''In constructors:'''
+===How to add Maps==
-<syntaxhighlight lang="java">
+lsdfldfl
-Item item1 = new Item();
-Item milk = new Item(“milk”, 0.99, 3);
-String x = new String();
-String y = new String(“Hello”);
-</syntaxhighlight>
-'''In methods:'''
 <syntaxhighlight lang="java">
-String x = new String("Hola, cómo estás");
+public void method(int ald){
-x.substring(2);
-x.substring(2, 5);
-x.indexOf("h");
-x.indexOf("h", 1);
-</syntaxhighlight>
-===Standard Methods===
-Two methods that should be included in classes (Good practice to include it):
-*toString
-*equals
-====The toString Methodg====
-*'''Returns data stored in an object as a String:'''
-**Allows the contents of an object to be displayed
-**Can format the contents whatever way you wish
-**MUST return a String*
-**MUST NOT take a parameter*
-<syntaxhighlight lang="java">
-public String toString() {
-    return name + ", " + day + " " + monthNames[month-1] + " " + year + ", " + address;
 }
-</syntaxhighlight>
-Example result:
-<syntaxhighlight lang="bash">
-"P. Sherman, 30 May 2003, 42 Wallaby Way, Sydney"
 </syntaxhighlight>