在Android的创造罐子里面一个jar和访问第一罐类 [英] In android create a jar inside jar and accessing the classes of first jar
问题描述
我的问题很简单,就是有可能创造在Android中一个罐子内的罐子。
像我有一个first.jar文件,我正在使用另一个项目类例如first.jar类方法
在first.jar我有类TestApp1Class,
公共类TestApp1Class {公共静态无效testMethod1(){
Log.i(TEST,嗨......);
}公共静态无效testMethod2(){
Log.i(TEST,你好......);
}
}
在另一个项目B I上课 TestApp2Class
我曾经first.jar类的方法,如 testMethod1();
正如你可以看到下面。
公共类TestApp2Class {公共静态无效TestApp2Method(){
Log.i(TESTAPP,喜TESTAPP2 ......);
TestAppMethods.testMethod1();
}公共静态无效TestApp2Method2(){
Log.i(TESTAPP,你好TESTAPP2 ......);
TestAppMethods.testMethod2();}
}
本项目B I导出为jar文件的名称second.jar,并在另一个项目C中使用这个jar。
一样,
公共类MainActivity延伸活动{@覆盖
保护无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
TestApp2Class.TestApp2Method();
}
}
和我在
越来越例外 java.lang.NoClassDefFoundError的:com.example.testapp.TestAppMethods
它不能够访问first.jar的类。因为这两天我一直在窃听与此有关。我想我已经尝试过几乎所有的东西。
步骤,我曾尝试:
- 通常我们得到这个错误,当它不检查标记,以便构建路径和出口。我已经做到了,并检查上标明的依赖。
- 我想只是把second.jar在libs文件夹中,而不是在构建路径,并试图与它力帮助。
- 我试图手动编辑
MANIFEST.IN
文件并添加一行类路径:库/ first.jar
在libs文件夹中保存first.jar而出口项目B到second.jar,甚至没有帮助。我觉得一个人不应该手动编辑MANIFEST.IN文件。
块引用>这些都是我已经试过的东西。请注明难道我做错了什么,或缺少什么。
每一次我尝试了所有上述步骤,我得到
的NoClassDefFoundError
例外。logcat的:
12-03 18:32:52.119:E / AndroidRuntime(29262):致命异常:主要
12-03 18:32:52.119:E / AndroidRuntime(29262):java.lang.NoClassDefFoundError的:com.example.testapp.TestAppMethods
12-03 18:32:52.119:E / AndroidRuntime(29262):在com.example.testapp2.TestaApp2Class.TestApp2Method(TestaApp2Class.java:11)
12-03 18:32:52.119:E / AndroidRuntime(29262):在com.example.jartestapp.MainActivity.onCreate(MainActivity.java:14)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.app.Activity.performCreate(Activity.java:5133)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2225)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2311)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.app.ActivityThread.access $ 600(ActivityThread.java:149)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1293)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.os.Handler.dispatchMessage(Handler.java:99)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.os.Looper.loop(Looper.java:137)
12-03 18:32:52.119:E / AndroidRuntime(29262):在android.app.ActivityThread.main(ActivityThread.java:5214)
12-03 18:32:52.119:E / AndroidRuntime(29262):在java.lang.reflect.Method.invokeNative(本机方法)
12-03 18:32:52.119:E / AndroidRuntime(29262):在java.lang.reflect.Method.invoke(Method.java:525)
12-03 18:32:52.119:E / AndroidRuntime(29262):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:739)
12-03 18:32:52.119:E / AndroidRuntime(29262):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
12-03 18:32:52.119:E / AndroidRuntime(29262):在dalvik.system.NativeStart.main(本机方法)
解决方案试着一步一步来:
1.删除所有库项目,然后清洁。
2.进入第一个项目点击右键属性 - > Android系统。检查库。
3.转到第二个项目右键点击属性 - > Android在图书馆部分选择添加 - >添加的第一个项目为图书馆。
4.转到第二个项目右键点击属性 - > Android系统。此外,检查是图书馆。
5.进入第三个项目c右键单击属性 - > Android系统。在库部分选择添加 - >添加第一和第二的库。 (不要让凸出C作为库)
6.现在一切都干净和运行PROJ℃。My question is simple, is it possible to create a jar inside a jar in android.
Like i have a first.jar file and i am using first.jar class methods in another project class for example
In first.jar i have class TestApp1Class,
public class TestApp1Class { public static void testMethod1(){ Log.i("TEST", "Hi...."); } public static void testMethod2(){ Log.i("TEST", "Hello...."); } }
In another project B i have class
TestApp2Class
where i used first.jar Class methods liketestMethod1();
as you can see below.public class TestApp2Class { public static void TestApp2Method() { Log.i("TESTAPP", "Hi TESTAPP2...."); TestAppMethods.testMethod1(); } public static void TestApp2Method2() { Log.i("TESTAPP", "Hello TESTAPP2...."); TestAppMethods.testMethod2(); }
}
This project B i exported as jar file name second.jar and used this jar in another project C.
Like,
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TestApp2Class.TestApp2Method(); }
}
And i am getting exception at
java.lang.NoClassDefFoundError: com.example.testapp.TestAppMethods
That it is not able to access class of first.jar. I have been bugged with this since two days. I think i have tried almost everything.Steps which i have tried:
- Usually we get this error when it is not checked marked in order and export of buildpath. I have done that and also check marked on dependencies.
- I tried just by putting second.jar in libs folder and not in buildpath and tried and it dint help.
- I tried to edit manually
MANIFEST.IN
file and added one lineClass-Path: libs/first.jar
and kept first.jar in libs folder while exporting project B to second.jar and even that did not help. I think one shouldn't manually edit that MANIFEST.IN file.These are things which i have tried. Please mention am i doing anything wrong or missing anything.
Each time i tried all above steps i got
NoClassDefFoundError
exception.Logcat:
12-03 18:32:52.119: E/AndroidRuntime(29262): FATAL EXCEPTION: main 12-03 18:32:52.119: E/AndroidRuntime(29262): java.lang.NoClassDefFoundError: com.example.testapp.TestAppMethods 12-03 18:32:52.119: E/AndroidRuntime(29262): at com.example.testapp2.TestaApp2Class.TestApp2Method(TestaApp2Class.java:11) 12-03 18:32:52.119: E/AndroidRuntime(29262): at com.example.jartestapp.MainActivity.onCreate(MainActivity.java:14) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.app.Activity.performCreate(Activity.java:5133) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2225) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2311) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.app.ActivityThread.access$600(ActivityThread.java:149) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1293) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.os.Handler.dispatchMessage(Handler.java:99) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.os.Looper.loop(Looper.java:137) 12-03 18:32:52.119: E/AndroidRuntime(29262): at android.app.ActivityThread.main(ActivityThread.java:5214) 12-03 18:32:52.119: E/AndroidRuntime(29262): at java.lang.reflect.Method.invokeNative(Native Method) 12-03 18:32:52.119: E/AndroidRuntime(29262): at java.lang.reflect.Method.invoke(Method.java:525) 12-03 18:32:52.119: E/AndroidRuntime(29262): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) 12-03 18:32:52.119: E/AndroidRuntime(29262): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555) 12-03 18:32:52.119: E/AndroidRuntime(29262): at dalvik.system.NativeStart.main(Native Method)
解决方案Try this Step by step:
1. Remove all library projects then Clean.
2. Go to first Project Right click Properties -> Android. Check Is Library.
3. Go to second Project Right click Properties -> Android in the Library section select Add -> Add first project as library.
4. Go to second Project Right click Properties -> Android. Also, Check Is Library.
5. Go to third project C Right click Properties -> Android. In the Library section select Add -> Add First and Second as library. (Do not make Proj C as library)
6. Now Clean everything and run Proj C.这篇关于在Android的创造罐子里面一个jar和访问第一罐类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!