Android Four Components service

Tag: Indicates close create RRI art nload parameter registration connected

Create a service and bind to the activityas one of the four main components of Android services, no exception to be registered in the Manifast

• The new service class inherits from the service and overrides the Onbind () method for binding with the active

 Public classMyseviceextendsService {//Create a Downloadbinder object Mbinder    PrivateDownloadbinder Mbinder =NewDownloadbinder (); //Create a Downloadbinder class that implements the method that the service needs to wait for activity instructions to execute    classDownloadbinderextendsBinder {
//Must be a method of Pubilc modification  Public intgetprocess () {return0; }} @Nullable @Override//returns the Downloadbinder object Mbinder     Publicibinder onbind (Intent Intent) {returnMbinder; } @Override//execute when the service is created     Public voidonCreate () {Toast.maketext ( This, "Service Creation succeeded", Toast.length_long). Show (); Super. OnCreate (); } @Override//Execute when service is started     Public intOnstartcommand (Intent Intent,intFlagsintStartid) {Toast.maketext ( This, "Service started successfully", Toast.length_long). Show (); return Super. Onstartcommand (Intent, flags, Startid); } @Override//Execute when service is closed     Public voidOnDestroy () {Toast.maketext ( This, "Service shutdown succeeded", Toast.length_long). Show (); Super. OnDestroy (); }}

• Find the Mbinder object passed in the activity.

    PrivateMysevice.downloadbinder Mdownloadbinder; //Create an anonymous inner class serviceconnection (), override Method Onserviceconnected (), and onservicedisconnected () are called at bind and unbind intervals, respectively    PrivateServiceconnection mconnection =Newserviceconnection () {@Override Public voidonserviceconnected (componentname name, IBinder service) {//change down to find the Mdownloadbinder object and invoke the public method in the objectMdownloadbinder =(mysevice.downloadbinder) service;        Mdownloadbinder.getprocess (); } @Override Public voidonservicedisconnected (componentname name) {}};

• Binding services and activities

    New Intent (threaddemoactivity.  this, Mysevice. class );    Bindservice (thread_bind_service,mconnection,bind_auto_create);      the bindservice () method receives three parameters, the first parameter is the Intent object that was just built, and the  second parameter is an instance of the Serviceconnection created earlier,    *  The third parameter is a flag bit, where the incoming bind_auto_create indicates that the service    is created automatically after the activity and the service are bound */

• Unbind

Unbindservice (mconnection);

Android Four Components service