In Binder.java,
public void attachInterface(IInterface owner, String descriptor) {
mOwner = owner;
mDescriptor = descriptor;
}
/**
* Attempt to retrieve a local implementation of an interface
* for this Binder object. If null is returned, you will need
* to instantiate a proxy class to marshall calls through
* the transact() method.
*/
public IInterface queryLocalInterface(String descriptor) {
if (mDescriptor.equals(descriptor)) {
return mOwner;
}
return null;
}
In ISms.java generated by ISms.aidl and AIDL tool,
public Stub()
{
this.attachInterface(this, DESCRIPTOR);
}
The function attachInterface(IInterface owner, String descriptor) will
be invoked whenever the object of ISms.Stub or the classes that extend
it.
So it seems that the function queryLocalInterface(String descriptor)
will not return null forever.
However, the comments said that it will return null if the Binder is
not a local one.
Does anybody know anything I missed?
Thanks in advance!
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