Gah I meant to say "sp<> and Surface are *internal implementation* details."
On Wed, Jun 8, 2011 at 12:37 PM, Dianne Hackborn <[email protected]>wrote: > sp<> and Surface are native APIs. This code will break on various devices. > > The only supported way to do this is with the new extended native APIs in > 2.3. > > > On Tue, Jun 7, 2011 at 7:06 AM, Sandeep Patil <[email protected] > > wrote: > >> Dear frndz, >> >> I am facing a problem of being not able to use the surface object >> obtained from an activity class in the native side. Here is what i am >> doing, >> >> * Getting a SurfaceView object with the help of findviewbyId() >> function. >> * Then obtaining its SurfaceHolder by calling getHolder() function of >> the surfaceView class. >> * Then adding a callback to the holder, so as to know when the surface >> is being created and destroyed. >> * Once i get the callback of onSurfaceCreated(), i am getting the >> surface object by getSurface() of the SurfaceHolder class and setting >> it to a (Surface mSUrface = null ) field in the Activity class. >> * From onSurfaceCreated() itself, I am calling a native function that >> tries to access the mSurface object and casts it to sp<Surface>. >> >> Here is my native function, >> >> JNIEXPORT void JNICALL setSurface(JNIEnv* env,jobject thiz) >> { >> jfieldID surfacefieldID; >> jfieldID surface_native; >> Surface* p; >> jclass clazz; >> >> clazz = env->FindClass("com/example/SMFMediaPlayer/ >> SecondActivity"); >> if (clazz == NULL) { >> LOGE("Can't find com/example/SMFMediaPlayer/SecondActivity >> \n"); >> } >> >> surfacefieldID = env->GetFieldID(clazz, "mSurface", "Landroid/view/ >> Surface;"); >> if (surfacefieldID == NULL) { >> LOGE("Can't find MediaPlayer.mSurface\n"); >> } >> >> jclass surface = env->FindClass("android/view/Surface"); >> if (surface == NULL) { >> LOGE("Can't find android/view/Surface\n"); >> } >> >> surface_native = env->GetFieldID(surface, "mSurface", "I"); >> >> if (surface_native == NULL) { >> LOGE("Can't find Surface fields\n"); >> } >> >> jobject surfaceobj = env->GetObjectField(thiz,surfacefieldID); >> if (surfaceobj != NULL) >> { >> p = (Surface*) env->GetIntField(surfaceobj, surface_native); >> >> if(p->isValid()) >> { >> const sp<Surface>& native_Surface = sp<Surface>(p); >> } >> } >> . >> //There some more code down here >> >> >> >> } >> >> >> >> >> The problem here is that the execution is stopping at the >> statement,"const sp<Surface>& native_Surface = sp<Surface>(p);". >> >> I am not getting what is the mistake. >> >> Actually i am using this code create my own media player. So i request >> to let me know my mistake or an alternative way to access the surface >> object. And also i need the SurfaceComposerClient object corresponding >> the surface object. >> >> SOmebody help me out. >> >> Thanks You >> Sandeep Patil >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to >> [email protected] >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en >> > > > > -- > Dianne Hackborn > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time to > provide private support, and so won't reply to such e-mails. All such > questions should be posted on public forums, where I and others can see and > answer them. > > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
