Add instruction to check service running

Author: cedricfung

README.md

@@ -11,6 +11,7 @@ You need ROOT permission from the adb
 
     $ ndk-build
     $ adb push libs/armeabi-v7a/ipc /data/local/
-    $ adb shell /data/local/ipc   # start the service
+    $ adb shell /data/local/ipc    # start the service
+    $ adb shell service list | grep binder_shm    # check the service running
 
 Then just use your Eclipse in the regular way.

jni/BinderSHM.cpp

@@ -53,7 +53,7 @@ class BnSHM : public BnInterface<ISHM> {
   virtual status_t onTransact(uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags = 0)
   {
     ALOGD("BnSHM::onTransact(%u)", code);
-    CHECK_INTERFACE(IScreenComposer, data, reply);
+    CHECK_INTERFACE(ISHM, data, reply);
     switch(code) {
       case SET_FD: {
              reply->writeInt32(setFD(data.readFileDescriptor()));