JAVAH找不到类（安卓NDK） [英] JAVAH can't find class( android ndk)

问题描述

我需要javah的和Android的NDK。

I need a help in javah and android-ndk.

我trye​​d生成H-文件，我的本地方法，但 javah的说没有发现的类文件

I tryed to generate H-file for my native method, but javah said class file not found.

我的目标类有绝对的名字$ PROJECT_DIRECTORY / 的src / BT / nativeclient / BtnativeActivity.java 并包含按照code：

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trye​​d启动 javah的从如下pathes：

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trye​​d指定的 -classpath pathes：

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

我trye​​d指定的android.jar 作为提及有：

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

不过，我总是得到结果只有一个：

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.

另外，是 -verbose 选项命令 javah的说，该命令seaching我的课是有效的地方：

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.

我想我已经失去了一些重要的事情，但我仍然无法找到解决方案。

I think I have lost some important thing, but I still can't find resolution.

可能有人帮助我，好吗？

Could anybody help me, please?

推荐答案

在Android构建系统的一部分蚂蚁居然会将类文件中斌/班。所以，你需要有 $ PROJECT_DIRECTORY /斌/班在 javah的类路径。例如，从src目录，你可以运行：

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

这假定您已经编译你的Java code到相应的类文件第一。您可以通过检查看到的是在bin / classes目录 - 它应该包含 BT 目录，这是你的包名上方

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.

这篇关于JAVAH找不到类（安卓NDK）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！