JAVAH 找不到类(android ndk)
我需要 javah 和 android-ndk 方面的帮助.
I need a help in javah and android-ndk.
我尝试为我的本地方法生成 H 文件，但 javah 说 找不到类文件.
I tryed to generate H-file for my native method, but javah said class file not found.
我的目标类具有绝对名称 $PROJECT_DIRECTORY/src/bt/nativeclient/BtnativeActivity.java 并包含以下代码:
My target class has absolute name $PROJECT_DIRECTORY/src/bt/nativeclient/BtnativeActivity.java and contains follow code:
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");
}
}
我尝试从以下路径启动 javah:
I tryed to start javah from follows pathes:
$(PROJECT_DIRECTORY)/bin$ javah -jni bt.nativeclient.BtnativeActivity
$(PROJECT_DIRECTORY)/jni$ javah -jni bt.nativeclient.BtnativeActivity
$(PROJECT_DIRECTORY)$ javah -jni bt.nativeclient.BtnativeActivity
我尝试指定 -classpath 路径:
$PROJECT_DIRECTORY/src$ javah -classpath :. bt.nativeclient.BtnativeActivity
我尝试在 那里指定 android.jar:
$PROJECT_DIRECTORY/bin$ javah -classpath :/home/l/android-sdks/platforms/android-10/android.jar:. bt.nativeclient.BtnativeActivity
但我总是只得到一个结果:
But always I get only one result:
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.
此外，使用 -verbose 选项命令 javah 表示该命令正在搜索我的类它的有效位置:
Moreover, with -verbose option command javah says that this command was seaching my class it the valid place:
$PROJECT_DIRECTORY/src$ 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.
我想我丢失了一些重要的东西，但我仍然找不到解决办法.
I think I have lost some important thing, but I still can't find resolution.
有人可以帮帮我吗?
推荐答案
Android构建系统的ant部分实际上是把class文件放在bin/classes中.所以你需要在 javah 类路径上有 $PROJECT_DIRECTORY/bin/classes.例如，您可以从 src 目录运行:
The ant part of the Android build system actually places the class files in bin/classes. So you need to have $PROJECT_DIRECTORY/bin/classes on the javah classpath. For example, from the src directory you could run:
$PROJECT_DIRECTORY/src$ javah -classpath ../bin/classes bt.nativeclient.BtnativeActivity
这假设您首先将 Java 代码编译为相应的类文件.您可以通过查看 bin/classes 目录中的内容来检查 - 它应该包含 bt 目录，这是您的包名称的顶部.
This assumes that you've compiled your Java code to the corresponding class files first. You can check by seeing what is in the bin/classes directory - it should contain the bt directory, which is the top of your package name.
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