Android : call getISurface( )

SurfaceControl和 Surface 的 getISurface( ) 是 private。 但是允許幾個 class 可以 direct call，所以宣告了幾個 friend class.: /* * Android frameworks friends * (eventually this should go away and be replaced by proper APIs) */ // camera and camcorder need access to the ISurface binder interface for preview friend class Camera; friend class MediaRecorder; // MediaPlayer needs access to ISurface for display friend class MediaPlayer; friend class IOMX; // this is just to be able to write some unit tests friend class Test; 其中的 class Test 是給方便用的。 所以..要用的話，就： namespace android { class Test { public: static const sp<ISurface> getISurface(const sp<SurfaceControl>& s) { return s->getISurface(); } } }; 這樣，就可以.. sp<ISurface> isurface = Test::getISurface(surface);