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测试文件：hello-jni/src/com/example/hellojni/HelloJni.java
- /**
- * 该文件来自 Android NDK Sample - HelloJni， 为了便于说明问题，我作了一些修改。
- */
- package com.example.hellojni;
- public class HelloJni
- {
- public native String stringFromJNI();
- public native String unimplementedStringFromJNI();
- static {
- System.loadLibrary("hello-jni");
- }
- }
/** * 该文件来自 Android NDK Sample - HelloJni， 为了便于说明问题，我作了一些修改。 */package com.example.hellojni;public class HelloJni{ public native String stringFromJNI(); public native String unimplementedStringFromJNI(); static { System.loadLibrary("hello-jni"); }}
错误一
- david@xmomx:hellojni$ javac HelloJni.java
- david@xmomx:hellojni$ ls
- Hello.class Hello.h Hello.java HelloJni.class HelloJni.java
- david@xmomx:hellojni$ javah -jni HelloJni
- error: cannot access HelloJni
- bad class file: ./HelloJni.class
- class file contains wrong class: com.example.hellojni.HelloJni
- Please remove or make sure it appears in the correct subdirectory of the classpath.
- com.sun.tools.javac.util.Abort
- at com.sun.tools.javac.comp.Check.completionError(Check.java:164)
- at com.sun.tools.javadoc.DocEnv.loadClass(DocEnv.java:149)
- at com.sun.tools.javadoc.RootDocImpl.<init>(RootDocImpl.java:77)
- at com.sun.tools.javadoc.JavadocTool.getRootDocImpl(JavadocTool.java:159)
- at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:330)
- at com.sun.tools.javadoc.Start.begin(Start.java:128)
- at com.sun.tools.javadoc.Main.execute(Main.java:66)
- at com.sun.tools.javah.Main.main(Main.java:147)
- javadoc: error - fatal error
- 2 errors
david@xmomx:hellojni$ javac HelloJni.java david@xmomx:hellojni$ lsHello.class Hello.h Hello.java HelloJni.class HelloJni.javadavid@xmomx:hellojni$ javah -jni HelloJnierror: cannot access HelloJnibad class file: ./HelloJni.classclass file contains wrong class: com.example.hellojni.HelloJniPlease remove or make sure it appears in the correct subdirectory of the classpath.com.sun.tools.javac.util.Abort at com.sun.tools.javac.comp.Check.completionError(Check.java:164) at com.sun.tools.javadoc.DocEnv.loadClass(DocEnv.java:149) at com.sun.tools.javadoc.RootDocImpl.<init>(RootDocImpl.java:77) at com.sun.tools.javadoc.JavadocTool.getRootDocImpl(JavadocTool.java:159) at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:330) at com.sun.tools.javadoc.Start.begin(Start.java:128) at com.sun.tools.javadoc.Main.execute(Main.java:66) at com.sun.tools.javah.Main.main(Main.java:147)javadoc: error - fatal error2 errors
错误原因，没有在正确的路径下执行 javah 命令，应该在源码根目录下执行。
错误二:
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- david@xmomx:hellojni$ cd ../../../
- david@xmomx:src$ ls
- com
- david@xmomx:src$ javah -jni HelloJni
- error: cannot access HelloJni
- class file for HelloJni not found
- javadoc: error - Class HelloJni not found.
- Error: No classes were specified on the command line. Try -help.
david@xmomx:hellojni$ cd ../../../david@xmomx:src$ lscomdavid@xmomx:src$ javah -jni HelloJnierror: cannot access HelloJniclass file for HelloJni not foundjavadoc: error - Class HelloJni not found.Error: No classes were specified on the command line. Try -help.
错误原因：Classes 参数要使用完整类名，也就是说要加上包名
错误四：
- david@xmomx:src$ javah -jni com/example/hellojni/HelloJni
- javadoc: error - Illegal package name: "com/example/hellojni/HelloJni"
- 1 error
david@xmomx:src$ javah -jni com/example/hellojni/HelloJnijavadoc: error - Illegal package name: "com/example/hellojni/HelloJni"1 error
错误原因：完整类名格式错误
- david@xmomx:src$ javah -jni com.example.hellojni.HelloJni
david@xmomx:src$ javah -jni com.example.hellojni.HelloJni
OK，编译通过。
如果还有错误，说是类找不到还是什么的，请尝试添加 -classpath . 参数。如下：
- david@xmomx:src$ javah -jni -classpath . com.example.hellojni.HelloJni
david@xmomx:src$ javah -jni -classpath . com.example.hellojni.HelloJni
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