Why are you calling pthread_exit(0) on the main thread, this will terminate
your application immediately.
You can't block on the main UI thread (which calls your JNI callback).
You'll need to find a different synchonization primitive (see AsyncHandlers
in the SDK doc)
On Wed, Aug 24, 2011 at 5:41 PM, arif <arifo...@gmail.com> wrote:
> Hi All,
>
> I ported one muti-threaded native code (binary) to android platform,
> and is working fine,
>
> Now i am trying to run this code by creating apk, created my native
> code as shared library using NDK and
> i am calling this shared library by using JNI, below is the sample
> code,
>
> But it is not working, i am new to java and jni, i did some web
> search, and i found that i need to attache/detach threads in jni,
>
> It will be very helpful if someone help me to handle this native
> threads in jni.
>
>
> Thanks
>
>
>
>
> /************************** apk code
> ***************************************/
> public class HelloJni extends Activity
> {
> /** Called when the activity is first created. */
> @Override
> public void onCreate(Bundle savedInstanceState)
> {
> super.onCreate(savedInstanceState);
>
> TextView tv = new TextView(this);
> tv.setText( stringFromJNI() );
> setContentView(tv);
> }
> public native String stringFromJNI();
>
> static {
> System.loadLibrary("my_lib");
> }
> }
>
> /****************************** JNI function
> ************************************/
> jstring
> Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env, jobject
> thiz)
> {
> int rc = native_main();
> if (rc == 0)
> return (*env)->NewStringUTF(env,
> "Successful!");
> else
> return (*env)->NewStringUTF(env, "Failure!");
> }
>
> /********************************* Native code
> ***********************************/
> int
> native_main()
> {
> int cnt;
> pthread_t thread;
> for (cnt =0; cnt < 5; cnt++)
> {
> if ( 0 != pthread_create (&thread1, NULL, (void *)
> &my_function,
> (void *) cnt))
> {
> return -1;
> }
> }
> pthread_exit(0); /* exit */
> return 0;
> }
>
> void my_function(void* cnt)
> {
> int c = (int) cnt;
>
> switch (c)
> {
> case 0:
> /* calling native funtion1 */
> break;
> case 1:
> /* calling native funtion2 */
> break;
> case 2:
> /* calling native funtion3 */
> break;
> case 3:
> /* calling native funtion4 */
> break;
> case 4:
> /* calling native funtion5 */
> break;
> }
> }
>
> /******************************************************************/
>
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>
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