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 <[email protected]> wrote:
> Hi, you are more likely to get help on android-ndk.
>
>
>
> On Wed, Sep 9, 2009 at 9:36 PM, pink 444 <[email protected]> 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
> [email protected]
>
> 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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