Aidl instance for Android service learning

Because each application runs in its own process space and can run another service process from the application UI, objects are often transferred between different processes. On the Android platform, a process generally cannot access the memory space of another process. Therefore, to perform a conversation, you need to break down the object into basic units that the operating system can understand and orderly pass through the process boundary. The following describes how to implement aidl calling. This article includes aidl interface calling, callback, and transmission of complex data types. Run demo Aidl File Person. aidl Package com. archermind. aidl; Parcelable person; Itaskbinder. aidl Package com. archermind. aidl; Import com. archermind. aidl. itaskcallback; Import com. archermind. aidl. person; Interface itaskbinder { Void fuc01 (); Void fuc02 (); String fuc03 (in person ); Void registercallback (itaskcallback CB ); Void unregistercallback (); } Itaskcallback. aidl Package com. archermind. aidl; Interface itaskcallback { Void onactionback (string Str ); } First look at the myservice code The server implements the aidl interface for the client to call. @ Override Public ibinder onbind (intent arg0 ){ // Todo auto-generated method stub Return mbinder; } Private Final itaskbinder. Stub mbinder = new itaskbinder. Stub (){ @ Override Public void unregistercallback () throws RemoteException { // Todo auto-generated method stub Log. V (TAG, "unregistercallback ..."); Mtaskcallback = NULL; } @ Override Public void registercallback (itaskcallback CB) throws RemoteException { // Todo auto-generated method stub Log. V (TAG, "registercallback ..."); Mtaskcallback = CB; } @ Override Public void fuc01 () throws RemoteException { // Todo auto-generated method stub Log. V (TAG, "fuc01 ..."); } @ Override Public void fuc02 () throws RemoteException { // Todo auto-generated method stub Log. V (TAG, "fuc02 ..."); Mtaskcallback. onactionback ("Hello World "); } @ Override Public String fuc03 (person) throws RemoteException { // Todo auto-generated method stub String name = person. getname (); String descrip = person. getdescrip (); Int sex = person. getsex (); String ret = ""; If (sex = 0 ){ Ret = "hello" + name + ", you are handsome" + "(" + descrip + ")"; } Else { Ret = "hello" + name + ", you are beautiful" + "(" + descrip + ")"; } Return ret; } }; Callback interface implemented by the client Private Final itaskcallback. Stub mcallback = new itaskcallback. Stub (){ @ Override Public void onactionback (string Str) throws RemoteException { // Todo auto-generated method stub Log. V (TAG, "onactionback STR =" + Str ); } }; How to bind a client to a server and establish a connection Intent intent = new intent ("com. archermind. aidl. myservice "); Bindservice (intent, mconnection, bind_auto_create ); Private serviceconnection mconnection = new serviceconnection (){ @ Override Public void onserviceconnected (componentname name, ibinder Service ){ // Todo auto-generated method stub Mservice = itaskbinder. stub. asinterface (service ); Try { Mservice. registercallback (mcallback ); } Catch (RemoteException e ){ // Todo auto-generated Catch Block E. printstacktrace (); } Log. V (TAG, "onserviceconnected "); } For more information, see the source code project in the attachment.

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Aidldemo.zip