Preciso de ajuda em javah e android-nd

Eu tentei gerar o arquivo H para o meu método nativo, mas javah disserquivo @class não encontrado.

Minha classe de destino tem nome absoluto $ PROJECT_DIRECTORY / src / bt / nativeclient / BtnativeActivity.java e contém o seguinte código:

package bt.nativeclient;

import android.app.Activity; import android.os.Bundle; import android.widget.TextView;

public class BtnativeActivity extends Activity  {
    @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("hello-jni");
    } 
 }

Eu tentei começar javah dos seguintes caminhos:

$(PROJECT_DIRECTORY)/bin$ javah -jni bt.nativeclient.BtnativeActivity
$(PROJECT_DIRECTORY)/jni$ javah -jni bt.nativeclient.BtnativeActivity
$(PROJECT_DIRECTORY)$ javah -jni bt.nativeclient.BtnativeActivity

Eu tentei especificar -classpath pathes:

$PROJECT_DIRECTORY/src$ javah -classpath :. bt.nativeclient.BtnativeActivity

Eu tentei especificar android.jar como mencionadoh:

$PROJECT_DIRECTORY/bin$ javah -classpath :/home/l/android-sdks/platforms/android-10/android.jar:. bt.nativeclient.BtnativeActivity

Mas sempre recebo apenas um resultado:

error: cannot access bt.nativeclient.BtnativeActivity
class file for bt.nativeclient.BtnativeActivity not found
javadoc: error - Class bt.nativeclient.BtnativeActivity not found.
Error: No classes were specified on the command line.  Try -help.

Moreover, com -verbose comando de opção javah diz que este comando estava pesquisando minha classe no local válido:

$PROJECT_DIRECTORY/src$ javah **-verbose** -classpath :/home/l/android-sdks/platforms/android-10/android.jar:. bt.nativeclient.BtnativeActivity
error: cannot access bt.nativeclient.BtnativeActivity
class file for bt.nativeclient.BtnativeActivity not found
javadoc: error - Class bt.nativeclient.BtnativeActivity not found.
[ Search Path: /usr/lib/jvm/java-6-openjdk/jre/lib/resources.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/rt.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/jsse.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/jce.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/charsets.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/netx.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/plugin.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/rhino.jar:/usr/lib/jvm/java-6-openjdk/jre/lib/modules/jdk.boot.jar:/usr/lib/jvm/java-6-openjdk/jre/classes/:/home/l/android-sdks/platforms/android-10/android.jar:. ]
Error: No classes were specified on the command line.  Try -help.

Acho que perdi algo importante, mas ainda não consigo encontrar resolução.

Alguém poderia me ajudar por favor