Java – JNI and the cancellation of AsyncTask

JNI and the cancellation of AsyncTask… here is a solution to the problem.

JNI and the cancellation of AsyncTask


have an AsyncTask and in doInBackground() I call the C function and it executes for a while. When I cancel my AsyncTask by calling cancel(true), it returns true – like the task was terminated, but I still see log statements from C code after “terminating”.

To me, the C function doesn’t seem to really terminate.

My question is – how do I properly terminate the execution of a C function?


Find the answer here .

This is version C:

jclass thread = (*env)->FindClass(env, "java/lang/Thread");
jmethodID mCurThread = (*env)->GetStaticMethodID(env, thread, "currentThread", "()Ljava/lang/Thread;" );
jmethodID mIsInterrupted = (*env)->GetMethodID(env, thread, "isInterrupted", "()Z");
jobject curThread = (jobject)(*env)->CallStaticObjectMethod(env, thread, mCurThread);

for (; ;) {
     do some stuff
    jboolean res = (jboolean)(*env)->CallBooleanMethod(env, curThread, mIsInterrupted);
    if (res == JNI_TRUE) {
    } else {

Related Problems and Solutions