Android callback function two: application example

If the concept of Android callback is not clear, see: Android callback Function one: basic concepts

1. Define the interface

 Package Com.app.util;  Public Interface Zyjcallback {   publicvoid  dataresult (String resultstring);        Public void Progress (Integer progress);        Public void start ();}

2. Entity

Package Com.app.util;import Android.os.AsyncTask; Public classZyjasynctask extends asynctask< string, Integer, String >{zyjcallback zyjcallback; //Start@Overrideprotected voidOnPreExecute () {super.onpreexecute ();    Zyjcallback.start (); }    /** * Special attention: publishprogress (10); * This sentence must be written, otherwise onprogressupdate (), this method will not be callback*/@OverrideprotectedString Doinbackground (String ...params) {publishprogress (Ten  ); Publishprogress ( -  ); Publishprogress ( -  ); Publishprogress ( -  ); return "ha ha, the operation is complete." ; }    //Onprogressupdate method for updating progress information@Overrideprotected voidonprogressupdate (Integer ... progresses) {zyjcallback.progress (progresses[0] ); } @Overrideprotected voidOnPostExecute (String result) {Super.onpostexecute (result);    Zyjcallback.dataresult (result); }     Public voidSetcallbacklistener (Zyjcallback zyjcallback) { This. Zyjcallback =Zyjcallback; }}

3. Callback

 PackageCom.android10;ImportCom.app.util.ZYJAsyncTask;ImportCom.app.util.ZYJCallBack;Importandroid.app.Activity;ImportAndroid.os.Bundle; Public classMainactivityextendsActivity {@Override Public voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Zyjasynctask Zyjasynctask=NewZyjasynctask (); Zyjasynctask.setcallbacklistener (NewZyjcallback () {@Override Public voidstart () {System.out.println ("SSSs is starting." ) ; } @Override Public voidProgress (Integer progress) {System.out.println ("SSSs Progress is:" +progress); } @Override Public voidDataresult (String resultstring) {System.out.println ("The ssss result is:" +resultstring);                }        }); Zyjasynctask.execute ("" ) ; }}

4. Operation result

SSSs started.
SSSs Progress is: 10
SSSs Progress is: 20
SSSs Progress is: 50
SSSs Progress is: 100

SSSs The result: hahaha, the operation is complete.

Android callback function two: application example