初学者初学Service

菜鸟初学Service
1. onStart() ,onStartCommand() instead.

As Follows :
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Java code

onStart() 
public void onStart(Intent intent, int startId) {
    
}

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onStartCommand:

Java code

    public int onStartCommand(Intent intent, int flags, int startId) {
        onStart(intent, startId); 
        return mStartCompatibility ? START_STICKY_COMPATIBILITY : START_STICKY;
    }

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Google API

Java code

void     onStart(Intent intent, int startId)
This method is deprecated. Implement onStartCommand(Intent, int, int) instead.
onStart方式已经过时,被onStartCommand取代 

int     onStartCommand(Intent intent, int flags, int startId)
Called by the system every time a client explicitly starts the service by calling startService(Intent),
 providing the arguments it supplied and a unique integer token representing the start request.

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那么为何还会在onStartCommand中 调用onStart()方法?

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他的启动顺序是 onCreate() ---> onStartCommand() ---> onStart() ,说明他却是调用了onStart()
注释掉 onStartCommand()后, 依然可以启动Service啊 !! onCreate() ---> onStart() 


观2.2源码中中 onStartCommand依然调用了onStart方法啊
既然都能正确的调用 那么onStart() 为何不推荐使用呢 ?

------解决方案--------------------
onStartCommand是新增加的方法。以前就是onStart。
------解决方案--------------------
为了兼容