android service onstartcommand

My Android advanced tutorial ------) the intent in the onStartCommand () method of service in android is null Today, when I was maintaining a company APP, a null pointer suddenly went wrong, Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.content.Intent.getBooleanExtra(java.

@Override Public int int int Startid) { System.out.println ("---------->>onstartcommand2"); return Super . Onstartcommand (Intent, flags, Startid); }During Android development, the Onstartcommand (Intent,int,int) method of the service object is called every time StartService (Intent) is calle

During Android development, every time startservice (intent) is called, The onstartcommand (intent, Int, INT) method of the service object will be called, and some processing will be done in the onstartcommand method. Then we noticed that this function has an int return value. Article It is to briefly explain the func

Meaning of onStartCommand () function return value in Android Service, androiddialog Return Value OnStartCommand () is called by the Android system and essentially the onStart () method. OnStartCommand () returns the following typ

Calling Stopself () in the service's Onstartcommand () does not immediately destroy the service, but waits until the Onstartcommand () is done destroy.public class Testservice extends Service {private String TAG = "Testservice"; @Overridepublic void OnCreate () {//TODO Auto -generated method Stublog.i (TAG, "onCreate")

Calling Stopself () in the service's Onstartcommand () does not immediately destroy the service, but waits until Onstartcommand () runs out of destroy.public class Testservice extends Service {private String TAG = "Testservice"; @Overridepublic void OnCreate () {//TODO Auto -generated method Stublog.i (TAG, "onCreate")

Stopping a serviceA started service must manage its own lifecycle. That was, the system does not stop or destroy the service unless it must recover system memory and the service continues to Run after onStartCommand() returns. So, the service must stop itself by calling stop

In the service Onstartcommand (Intent Intent, int flags, int startid) The meanings of these three parameters are, Intent is StartService (Intent Intent) The intent;flags on behalf of flags indicates how the service is started:Additional data about this start request. Currently either 0, Start_flag_redelivery, or start_flag_retry.Start_flag_redelivery: If you impl

not be called.OnDestroy ()The system calls this method when the service is no longer being used or is being destroyed. Your service will implement this method to do some cleanup of resources, such as: threads, listening, broadcasting receivers and so on. This is the last callback received by the service.If a component starts a service through StartService () (wh

Activity calls the unBindService () method to cancel binding to the Service, it only disconnects the Activity from the Service and cannot stop the Service component. 3. API-ServicePublic abstract class Service (1) Inheritance relation java. lang. object upload android. con

Activity (client Activiy) calls BindService () to bind a started Service (the Activity is initially started using the startService () method, the system only transmits the IBinder object inside the Service (returned by the onBind () method) to the acitinder, and does not completely "bind" the Service lifecycle to the Activity, therefore, when the Activity calls

the following identifier activityIntent. setFlags (Intent. FLAG_ACTIVITY_NEW_TASK); startActivity (activityIntent ); Complete code: Package com. service; import com. task. selectFriendsActivity; import android. app. service; import android. content. context; import android