导入库后无法解析目标'android-8'

Question

所以我一直在努力将现有的项目导入eclipse几天,我终于弄明白了.我导入了所有需要的库项目,它工作正常,但还有一个错误.

图书馆项目'PortraitQR'旁边有一个红色的'x'标记,上面写着'无法解析目标'android-8''.

我试图编译应用程序,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.access$600(ActivityThread.java:141)
07-16 18:24:14.296: E/AndroidRuntime(9673):     at android.app.ActivityThread$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

我做了一些关于如何修复android-8解决目标错误的研究,但是如果导入库时错误显示我无法找到任何地方该怎么办.使用SDK管理器更新时,人们通常会遇到此错误.

Answer 1

我不得不打开SDK管理器,只需安装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:)

Answer 2

在某些情况下,您应该在安装后选择项目的目标平台.这样做:

1. 右键单击project-> properties.
2. 在左侧面板上选择Android.
3. 如果您在(项目构建目标)中看到Android 4.0.3,则勾选它并单击应用按钮.
4. 如果您在Build Targets中没有4.0.3版本,那么您还没有.安装只需转到sdk管理器并单击Android 4.0.3(API 15)-SDK平台.