java/jdk版本不对导致android编译错误
16lz
2021-12-04
1.问题描述:
以前编译android4.4的时候没啥问题,自从安装了eclipse后就编译不过,错误信息如下:
GenerateJNIHeader jni_from_javap = JNIFromJavaP.CreateFromClass(input_file, options) File "../../base/android/jni_generator/jni_generator.py", line 522, in CreateFromClass jni_from_javap = JNIFromJavaP(stdout.split('\n'), options) File "../../base/android/jni_generator/jni_generator.py", line 488, in __init__ signature=JniParams.ParseJavaPSignature(contents[lineno + 1]))] File "../../base/android/jni_generator/jni_generator.py", line 147, in ParseJavaPSignature return '"%s"' % signature_line[signature_line.index(prefix) + len(prefix):]ValueError: substring not foundmake: *** [out/target/product/smdk4x12/obj/GYP/shared_intermediates/ui/gl/jni/Surface_jni.h] Error 1make: *** Waiting for unfinished jobs....make: *** [out/target/product/smdk4x12/obj/GYP/shared_intermediates/android_webview/jni/InputStream_jni.h] Error 1Traceback (most recent call last): File "../../base/android/jni_generator/jni_generator.py", line 1103, in sys.exit(main(sys.argv)) File "../../base/android/jni_generator/jni_generator.py", line 1099, in main GenerateJNIHeader(input_file, output_file, options) File "../../base/android/jni_generator/jni_generator.py", line 1012, in GenerateJNIHeader jni_from_javap = JNIFromJavaP.CreateFromClass(input_file, options) File "../../base/android/jni_generator/jni_generator.py", line 522, in CreateFromClass jni_from_javap = JNIFromJavaP(stdout.split('\n'), options) File "../../base/android/jni_generator/jni_generator.py", line 488, in __init__ signature=JniParams.ParseJavaPSignature(contents[lineno + 1]))] File "../../base/android/jni_generator/jni_generator.py", line 147, in ParseJavaPSignature return '"%s"' % signature_line[signature_line.index(prefix) + len(prefix):]ValueError: substring not foundmake: *** [out/target/product/smdk4x12/obj/GYP/shared_intermediates/android_webview/jni/CancellationSignal_jni.h] Error 1 2.原因分析:
导致上述的错误应该是我在用eclipse的时候需要用jdk 7,而android4.4源码编译需要用jdk 6,所以才会出现莫名其妙的错误.
3.解决方法:
用一个命令就可以切换jdk版本,这个命令是：
sudo update-alternatives --config javapsudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/jdk1.6.0_45/bin/javap 300否则就需要选择jdk版本
root@ubuntu:/home/topeet/Android/iTop4412_KK4.4_git# sudo update-alternatives --config javapThere are 2 choices for the alternative javap (providing /usr/bin/javap). Selection Path Priority Status------------------------------------------------------------* 0 /usr/lib/jvm/jdk1.8.0_74/bin/javap 300 auto mode 1 /usr/lib/jvm/jdk1.6.0_43/bin/javap 1 manual mode 2 /usr/lib/jvm/jdk1.8.0_74/bin/javap 300 manual modePress enter to keep the current choice[*], or type selection number: 1update-alternatives: using /usr/lib/jvm/jdk1.6.0_43/bin/javap to provide /usr/bin/javap (javap) in manual mode.root@ubuntu:/home/topeet/Android/iTop4412_KK4.4_git# root@ubuntu:/home/topeet/Android/iTop4412_KK4.4_git# root@ubuntu:/home/topeet/Android/iTop4412_KK4.4_git# root@ubuntu:/home/topeet/Android/iTop4412_KK4.4_git# sudo update-alternatives --config javapThere are 2 choices for the alternative javap (providing /usr/bin/javap). Selection Path Priority Status------------------------------------------------------------ 0 /usr/lib/jvm/jdk1.8.0_74/bin/javap 300 auto mode* 1 /usr/lib/jvm/jdk1.6.0_43/bin/javap 1 manual mode 2 /usr/lib/jvm/jdk1.8.0_74/bin/javap 300 manual modePress enter to keep the current choice[*], or type selection number:最后java -version的版本是改过来了，但是javac -version的版本没有改过来
root@maya-g450:/opt/FriendlyARM/android-4.2.2_r1# make -j4============================================PLATFORM_VERSION_CODENAME=RELPLATFORM_VERSION=4.2.2TARGET_PRODUCT=full_tiny4412TARGET_BUILD_VARIANT=engTARGET_BUILD_TYPE=releaseTARGET_BUILD_APPS=TARGET_ARCH=armTARGET_ARCH_VARIANT=armv7-a-neonHOST_ARCH=x86HOST_OS=linuxHOST_OS_EXTRA=Linux-3.16.0-77-generic-x86_64-with-Ubuntu-14.04-trustyHOST_BUILD_TYPE=releaseBUILD_ID=JDQ39OUT_DIR=out============================================Checking build tools versions...************************************************************You are attempting to build with the incorrect versionof javac. Your version is: javac 1.8.0_74.The correct version is: 1.6. Please follow the machine setup instructions at https://source.android.com/source/download.html************************************************************再次修改另一个文件：bashrc文件，把JAVA_HOME的目录改成java 1.6的就可以解决问题。
export JAVA_HOME=/usr/lib/jvm/jdk1.6.0_43/
参考资料：http://www.linuxdiyf.com/linux/15546.html
http://blog.csdn.net/evahuangchen/article/details/48392539
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