Hello!
I am developing a project which has to use native code. Especifically, I
need to create on the native side an instance of the class MyDecoder, which
then will do some work. As soon as the MyDecoder constructor is called for
the first time, the application crashes silently - no exception shown in
Logcat, no "Force close" dialog on screen, nothing; just the desktop
showing again.
On the java class which calls it (CamPreview.java), I have already declared
the native function (private native boolean invokeDecoder(Mat captured); ),
and on the native side (Decoder.cpp), I have the function:
extern "C" jboolean
Java_com_example_test011_CamPreview_invokeDecoder(JNIEnv* env, jobject
javaThis, const Mat &captured)
{
LOGD("A"); //this message is shown
MyDecoder* dec= new MyDecoder( Size(1280,720) );
LOGD("B"); //this message never appears
return false
}
(LOGD is just a macro for writing on LogCat)
Then, MyDecoder's constructor, defined in MyDecoder.cpp, is:
MyDecoder::MyDecoder(Size s) {
LOGD("Constructor started"); //never shows
// stuff
}
The "A" message before the constructor call is showing (which means all the
JNI stuff is, hopefully, correctly configured); but then the app closes.
The constructor doesn't appear to launch (the "Constructor started" text is
never displayed), but I have no idea where the error might be. I have been
googling, and the closest thing that I have found is this StackOverflow
thread<http://stackoverflow.com/questions/11190469/android-app-crashes-suddenly-while-running>
which
seems to be related to memory running out. In my case, since it happens on
the very beginning of the app, and (just to test) I have largeHeap="true"
on a Galaxy S3 (meaning, 256MB), that doesn't seem very likely.
Do you have any idea about what might be happening?
Thank you in advance!
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