我的库如何在Android中导入另一个库？

Question

我从Android中的库开始，并设法在我的应用程序中以这种方式导入了一个库：

1. 在.aar文件夹中添加/libs文件
2. 添加build.gradle： 存储库{ flatDir {dirs‘’libs‘}依赖{.编译(名称：‘mylibrary1 1’，ext:'aar') }

这很好，但是我在mylibrary1中做了mylibrary1和重复步骤1和2，所以现在mylibrary1可以使用mylibrary2了。

总之，我希望我的应用程序导入mylibrary1，mylibrary1导入mylibrary2。

问题在我的应用程序中，当我从mylibrary2调用一个方法时，我得到了一个例外：java.lang.NoClassDefFoundError，我希望有人能帮我

这里是stackstrace，以防有帮助：

E/AndroidRuntime: FATAL EXCEPTION: main
 Process: ar.com.tally.myapplication, PID: 30197
 java.lang.NoClassDefFoundError: Failed resolution of: Lar/com/tally/mylibrary2/Class2;
     at ar.com.tally.mylibrary1.Class1.get1(Class1.java:10)
     at ar.com.tally.myapplication.MainActivity$1.onClick(MainActivity.java:28)
     at android.view.View.performClick(View.java:5076)
     at android.view.View$PerformClick.run(View.java:20279)
     at android.os.Handler.handleCallback(Handler.java:739)
     at android.os.Handler.dispatchMessage(Handler.java:95)
     at android.os.Looper.loop(Looper.java:135)
     at android.app.ActivityThread.main(ActivityThread.java:5910)
     at java.lang.reflect.Method.invoke(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:372)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)
  Caused by: java.lang.ClassNotFoundException: Didn't find class "ar.com.tally.mylibrary2.Class2" on path: DexPathList[[dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-support-annotations-23.2.1_d668123607e57c7aa4406ba98a4276e21606428b-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_9-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_8-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_7-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_6-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_5-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_4-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_3-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_2-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_1-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-slice_0-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-internal_impl-23.2.1_eca880fd3aaa2f093d820f9d7b8841aa1fa00b4f-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-intermediates-exploded-aar-mylibrary1_7763b008eb2396101d055fb29b3e03d5ee273add-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-com.android.support-support-vector-drawable-23.2.1_5e6bcbbe4699b2a562a7ba7b6349f8bbfbef9fb4-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-com.android.support-support-v4-23.2.1_c564c185a6a1edef108674e96bf4712114e0c95a-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-com.android.support-recyclerview-v7-23.2.1_a1ec4cea5854a30b896e5f639d2fd95cd214b2b1-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-com.android.support-design-23.2.1_2c4b9902e86719e2bd0652ddfba695894bed0a47-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-com.android.support-appcompat-v7-23.2.1_01059d3db947a24736ebcedd233fd40b734ccf3e-classes.dex", dex file "/data/data/ar.com.tally.myapplication/files/instant-run/dex/slice-com.android.support-animated-vector-drawable-23.2.1_69d3f470bac3bccd2f54179c6363fce8b9091976-classes.dex"],nativeLibraryDirectories=[/vendor/lib, /system/lib, /vendor/lib, /system/lib]]
     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
     at com.android.tools.fd.runtime.IncrementalClassLoader$DelegateClassLoader.findClass(IncrementalClassLoader.java:90)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
     at ar.com.tally.mylibrary1.Class1.get1(Class1.java:10) 
     at ar.com.tally.myapplication.MainActivity$1.onClick(MainActivity.java:28) 
     at android.view.View.performClick(View.java:5076) 
     at android.view.View$PerformClick.run(View.java:20279) 
     at android.os.Handler.handleCallback(Handler.java:739) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5910) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200) 
     Suppressed: java.lang.ClassNotFoundException: Didn't find class "ar.com.tally.mylibrary2.Class2" on path: DexPathList[[zip file "/data/app/ar.com.tally.myapplication-1

Answer 1

因此，当您制作mylibrary2时，您也更改了mylibrary1，因此您需要用新的aars来替换aars，清理并重新构建。

但是，如果您将这些库与模块放在同一个项目中，我建议您将它们作为项目导入，而不是手动处理。

compile project(':mylibrary1') compile project(':mylibrary2')

或者，如果在不同的项目中，如本例所示，您可以在存储库中添加mavenLocal()：

    repositories {
     mavenLocal()
...
}

在lib项目中，您可以添加maven插件：

apply plugin: 'maven'

然后你需要打电话：

分级安装

它将在本地maven repo中安装lib。所以你不需要手动复制它们