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Peli
www.openintents.org
On Sep 10, 8:17 am, pink 444 <pnk...@gmail.com> wrote:
> Hai,
> I am newbie to Android ,Hence can you explain it in detail .
>
> Thanks in Advance,
> -Siva.
>
> On Sep 10, 11:02 am, Dianne Hackborn <hack...@android.com> wrote:
>
> > Hi, you are more likely to get help on android-ndk.
>
> > On Wed, Sep 9, 2009 at 9:36 PM, pink 444 <pnk...@gmail.com> wrote:
>
> > > hai folks,
>
> > > In Android , Native code is written as follows.
>
> > > JNIEXPORT void JNICALL Java_com_android_Test_show(JNIEnv *env, jobject
> > > obj)
> > > {
> > > printf("THIS IS TEST");
> > > }
>
> > > JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void *reserved)
> > > {
> > > JNIEnv *env;
> > > JNINativeMethod meth;
> > > jclass k;
> > > jint r;
>
> > > r = (*vm)->GetEnv (vm, (void **) &env, JNI_VERSION_1_4);
> > > k = (*env)->FindClass (env, "com.android.Test.show");
>
> > > meth.name = "show";
> > > meth.signature = "()V";
> > > meth.fnPtr = Java_com.android.Test.show;
> > > r = (*env)->RegisterNatives (env, k, &meth, 1);
> > > return JNI_VERSION_1_4;
>
> > > }
>
> > > JNIEXPORT void JNI_OnUnload(JavaVM *vm, void *reserved)
> > > {
> > > JNIEnv *env;
> > > jclass k;
> > > jint r;
> > > r = (*vm)->GetEnv (vm, (void **) &env, JNI_VERSION_1_4);
> > > k = (*env)->FindClass (env, "com.android.Test.show");
> > > (*env)->UnregisterNatives(env, k);
>
> > > }
>
> > > While executing on Android the following messages are obeserved in adb
> > > logcat.
>
> > > JNI ( 524): Trying to load jni .so
> > > I/System.out( 524): /system/lib
> > > D/dalvikvm( 524): Trying to load lib /data/libjnilibs.so 0x433f22d0
> > > D/dalvikvm( 524): Added shared lib /data/libjnilibs.so 0x433f22d0
> > > I/ActivityManager( 50): Displayed activity
> > > com.android.helloactivity
>
> > > But "THIS IS TEST" is not being displayed, which is displayed in
> > > native code.
>
> > > There are no errors regarding loading shared library and calling
> > > native code.Then why is the message is not displayed in logging.
>
> > > Am i doing any mistake.If JNI_OnLoad and JNI_OnUnLoad are not
> > > implemented i am getting errors in Logging.If i do as above i not
> > > getting that native code message.
>
> > > Any help would be appreciated highly.
>
> > > Regards,
> > > -Siva.
>
> > --
> > Dianne Hackborn
> > Android framework engineer
> > hack...@android.com
>
> > 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.
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