??????????????????android?е????????????Android???????????????????????????????????????????????飬??????????linux?????????????????????о???????????????λ????????????android????????????????

?????????????????????????Android?????????????????

??????????“Android ????????????????????”??

??????????????????Android?е????????????Android??????????????????????????????????????????????飬??????????Linux????????????????????о???????????????λ????????????Android????????????????

????rlei??????Android??????????

????????Intent?????????Android???("??????????????")????????????????????iOS????????????SNS??facebook/twitter/sina weibo?????????????????(iOS5???????twitter???);Android???????????share?????intent???????Intent??ι???????????????????Activity Manager?? Package Manager?? Services??ЩAndroid????????????ι??????

????????Binder??Android??????????????顣Android????Intent?????????????/??y???????????????Binder IPC????????????Android????????????????BeOS??Palm OS 6(?????OS6...)δ??????????????

????MVC(Content Provider?? Activity?? Layout?? Adapters)????????????????Android???е??

????Content Provider???????????????????????????顣????????￡?content provider????????????URI?????廯????????????(URI?????????????ν?????????)??????????????????????????????????????????????????content provider?????????????where??????SQL????????……

????????Android???????????????????????????????Linux????????????????????API????????????JVM?????

????Billy Cui???????????????????

????Android????????????Linux????????????????????????顣

???????????????????????????????????

????1. userid : ?????linux????????app?????shareuid???????????????userid??????е??Щ??????????????????????????????????uid??÷????

????2. ???level??system level or app level????????????????λ?t????????system/app?°?????????system level???????????л???????????????羲?????????????

????3. permission : ????????????????????????????????????????????????????У???????????AndroidManifest.xml????????use-permission??????????api???????ж???????з??????????糣???android.permission.INTERNET???

????4. signature: ???????Android??????е???????????????????????????????Щ???????????shareuid??????????????????????????????permission??????/???????????????????????????????????????????ò????????????????????API??

???????????????Android??uid?????????????Щ??????????????uid??????system/media???????????system level??services???????????

??????????????Android??????????????????

????Android??????????????????ζ?????????????????????????????????????????????????????????????????κ????????????????????????????????????????Android????????????????????Щ?????iOS??????????????????????????????????á?

???????Android???????????????????????????????????????????????????е?module??????????????????????ú???????????????????е????????????Android?????????????????????????????????????Android????????????(NDK?????dalvik?????????)??

?????????????Framework??????????????????????????????????????????????飬??????????????????????????аɡ?????????????????????????????????????

???????????????????????

????Android??????Linux?????????????Linux??????????????????????????????

????Android???????Framework??????????????????????????????????????????????(Intent)????????????棬Intent?????????????壬??????棬Intent???????Android????????Э?顣

????Android?????????????е???????й????Android?У??????????????????????????й??Android????????????????????????????

??????????????????????Android?б?????????飬????????????????????????????????????UI????????????????豸??????

?????????Android?????к??????????????????????