eclipse 导入库后无法解析目标“android-8”
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原文地址: http://stackoverflow.com/questions/17682196/
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Unable to resolve target 'android-8' after importing libraries
提问by Guy
So I've been struggling with importing an existing project to eclipse for a few days now and I've finally figured it out. I imported all the needed library projects and it works fine, but there's one more error.
所以几天来，我一直在努力将现有项目导入到 eclipse 中，我终于弄明白了。我导入了所有需要的库项目，它运行良好，但还有一个错误。
Library project 'PortraitQR' has a red 'x' mark next to it says 'Unable to resolve target 'android-8''.
库项目“PortraitQR”旁边有一个红色的“x”标记，上面写着“无法解析目标“android-8”。
I tried to compile the application anyway but it crashes, here's the logcat file:
我无论如何都试图编译该应用程序，但它崩溃了，这是 logcat 文件：
07-16 18:24:14.296: E/AndroidRuntime(9673): FATAL EXCEPTION: main
07-16 18:24:14.296: E/AndroidRuntime(9673): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{si.dvanadva.evanturist/si.dvanadva.evanturist.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "si.dvanadva.evanturist.MainActivity" on path: /data/app/si.dvanadva.evanturist-2.apk
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106)
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.app.ActivityThread.access0(ActivityThread.java:141)
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.os.Handler.dispatchMessage(Handler.java:99)
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.os.Looper.loop(Looper.java:137)
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-16 18:24:14.296: E/AndroidRuntime(9673): at java.lang.reflect.Method.invokeNative(Native Method)
07-16 18:24:14.296: E/AndroidRuntime(9673): at java.lang.reflect.Method.invoke(Method.java:511)
07-16 18:24:14.296: E/AndroidRuntime(9673): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-16 18:24:14.296: E/AndroidRuntime(9673): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-16 18:24:14.296: E/AndroidRuntime(9673): at dalvik.system.NativeStart.main(Native Method)
07-16 18:24:14.296: E/AndroidRuntime(9673): Caused by: java.lang.ClassNotFoundException: Didn't find class "si.dvanadva.evanturist.MainActivity" on path: /data/app/si.dvanadva.evanturist-2.apk
07-16 18:24:14.296: E/AndroidRuntime(9673): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
07-16 18:24:14.296: E/AndroidRuntime(9673): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
07-16 18:24:14.296: E/AndroidRuntime(9673): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.app.Instrumentation.newActivity(Instrumentation.java:1054)
07-16 18:24:14.296: E/AndroidRuntime(9673): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
07-16 18:24:14.296: E/AndroidRuntime(9673): ... 11 more
I did some research on how to fix android-8 resolve target error, but I can't find anywhere what to do if the error shows as soon as you import libraries. People usually have this error when updating with SDK manager.
我做了一些关于如何修复 android-8 解决目标错误的研究，但是如果在您导入库后立即显示错误，我无法找到该怎么做。人们在使用 SDK 管理器更新时通常会出现此错误。
回答by Guy
I had to open up SDK manager and simply installed API level 8. That solved my problem. Vote up the user in the comments that gave me the solution :)
我不得不打开 SDK 管理器并简单地安装 API 级别 8。这解决了我的问题。在给我解决方案的评论中投票给用户:)
回答by MojAmiri
in some cases after installation you should select the target platform for your project. to do so:
在某些情况下，安装后您应该为您的项目选择目标平台。这样做：
- Right click on project->properties.
- Select Android on left panel.
- If you see Android 4.0.3 in (Project Build Target), then tick it and click Apply button.
- If you don't have 4.0.3 version in Build Targets, then you don't have it yet. to install simply go to sdk manager and click on Android 4.0.3(API 15)-SDK Platform.
- 右键单击项目-> 属性。
- 在左侧面板上选择 Android。
- 如果您在 (Project Build Target) 中看到 Android 4.0.3，请勾选它并单击 Apply 按钮。
- 如果您在 Build Targets 中没有 4.0.3 版本，那么您还没有它。安装只需转到 sdk 管理器并单击 Android 4.0.3(API 15)-SDK Platform。
