Android Adv的運行時錯誤嘗試SLF4j - Logback

Question

我想在我的Android應用程序（IDE Eclipse）中使用slf4j與logback。 我已經添加了jar文件（slf4j-api-1.7.1 logback-android-1.0.7-1.jar）在Eclipse中構建路徑。 我嘗試推出我的應用程序在進階與下面的簡單主要活動

import org.slf4j.Logger 
import org.slf4j.LoggerFactory 
public class MainActivity extends Activity{ 
    private static final Logger logger = 
       LoggerFactory.getLogger(MainActivity.class); 
    private void onnCreate(Bundle svedInstanceState){ 
     super.onCreate(savedInstanceState) 
     logger.debug("MainActivity created"); 
    } 
} 

和我得到的logcat

捕獲以下錯誤

10-02 16:03:46.911: I/dalvikvm(619): Could not find method org.slf4j.LoggerFactory.getLogger, referenced from method com.mbm.activity.MainActivity.<clinit> 
10-02 16:03:46.911: W/dalvikvm(619): VFY: unable to resolve static method 3250: Lorg/slf4j/LoggerFactory;.getLogger (Ljava/lang/Class;)Lorg/slf4j/Logger; 
10-02 16:03:46.941: I/dalvikvm(619): Could not find method org.slf4j.Logger.debug, referenced from method com.mbm.activity.MainActivity.onToggleClicked 
10-02 16:03:46.941: W/dalvikvm(619): VFY: unable to resolve interface method 3248: Lorg/slf4j/Logger;.debug (Ljava/lang/String;)V 
10-02 16:03:46.941: I/dalvikvm(619): Could not find method org.slf4j.Logger.info, referenced from method com.mbm.activity.MainActivity.onToggleClicked 
10-02 16:03:46.941: W/dalvikvm(619): VFY: unable to resolve interface method 3249: Lorg/slf4j/Logger;.info (Ljava/lang/String;)V 
10-02 16:03:46.951: W/dalvikvm(619): Exception Ljava/lang/NoClassDefFoundError; thrown while initializing Lcom/mbm/activity/MainActivity; 
10-02 16:03:46.951: W/dalvikvm(619): Class init failed in newInstance call (Lcom/mbm/activity/MainActivity;) 
10-02 16:03:46.951: W/dalvikvm(619): threadid=1: thread exiting with uncaught exception (group=0x40a13300) 
10-02 16:03:46.961: E/AndroidRuntime(619): FATAL EXCEPTION: main 
10-02 16:03:46.961: E/AndroidRuntime(619): java.lang.ExceptionInInitializerError 
10-02 16:03:46.961: E/AndroidRuntime(619): at java.lang.Class.newInstanceImpl(Native Method) 
10-02 16:03:46.961: E/AndroidRuntime(619): at java.lang.Class.newInstance(Class.java:1319) 
10-02 16:03:46.961: E/AndroidRuntime(619): at android.app.Instrumentation.newActivity(Instrumentation.java:1053) 
10-02 16:03:46.961: E/AndroidRuntime(619): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974) 
10-02 16:03:46.961: E/AndroidRuntime(619): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
10-02 16:03:46.961: E/AndroidRuntime(619): at android.app.ActivityThread.access$600(ActivityThread.java:130) 
10-02 16:03:46.961: E/AndroidRuntime(619): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
10-02 16:03:46.961: E/AndroidRuntime(619): at android.os.Handler.dispatchMessage(Handler.java:99) 
10-02 16:03:46.961: E/AndroidRuntime(619): at android.os.Looper.loop(Looper.java:137) 
10-02 16:03:46.961: E/AndroidRuntime(619): at android.app.ActivityThread.main(ActivityThread.java:4745) 
10-02 16:03:46.961: E/AndroidRuntime(619): at java.lang.reflect.Method.invokeNative(Native Method) 
10-02 16:03:46.961: E/AndroidRuntime(619): at java.lang.reflect.Method.invoke(Method.java:511) 
10-02 16:03:46.961: E/AndroidRuntime(619): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
10-02 16:03:46.961: E/AndroidRuntime(619): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
10-02 16:03:46.961: E/AndroidRuntime(619): at dalvik.system.NativeStart.main(Native Method) 
10-02 16:03:46.961: E/AndroidRuntime(619): Caused by: java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory 
10-02 16:03:46.961: E/AndroidRuntime(619): at com.mbm.activity.MainActivity.<clinit>(MainActivity.java:41) 
10-02 16:03:46.961: E/AndroidRuntime(619): ... 15 more 

請幫助我。

Answer 1

我獨自解決了以下步驟的問題： 1）將2個jar文件放入項目中的新文件夾中。 2）添加罐子來建立路徑 3）在Java Build Path中輸入「Order and Export」選項卡並選擇兩個罐子，然後按確定。 4）項目 - >清潔！ 完成這些步驟後，應用程序運行正常無誤！