Understanding of Android Callbacks (combined interface)

Here is a classic example of how the callback is implemented, in which the mechanism contains

Two classes and an interface, the interface is defined as follows:

// equivalent to the interface ina  Public Interface boomwtc{  // Get Bin Laden's decision public    benladengdecide ()  ; // execution of the bombing of WTO   Public void boom ();}

Class A is defined as follows, as a main class that implements the interface

//equivalent to class A Public classat$911Implementsboomwtc{Private Booleandecide; PrivateTerroristattack Ta;//Class B   PublicAt$911 () {//constructor FunctionDate now=NewDate (); SimpleDateFormat MYFMT1=NewSimpleDateFormat ("Yy/mm/dd hh:mm");  This. dicede= myfmt.format (dt). Equals ("01/09/11 09:44");  This. ta=NewTerroristattack (); }  //the decision to get Bin Laden   Public Booleanbenladengdecide () {returndecide; }  //execution of the bombing of WTO   Public voidBoom () {Ta.attack (Newat$911);//Class A calls the Class B method to pass in its own object, which is equivalent to "You Call Me"  }}

Class B is defined as follows:

 Public class terroristattack{  public  terroristattack () {  }  public attack ( BOOMWTC BMW) {   // Call the method in Class A    if(Bmw.benladengdecide ()) {/    *  Class B's method of callback Class A in the method, equivalent to "I call you back"*/        }}  }　　　

As can be seen from the example, Class B is a way to callback Class A through an interface

Understanding of Android Callbacks (combined interface)