我正在尝试制作一个简单的应用程序,但我遇到了这个令人讨厌的错误,我无法找出原因......
01-06 18:05:04.734: E/AndroidRuntime(1102): FATAL EXCEPTION: main
01-06 18:05:04.734: E/AndroidRuntime(1102): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.coindroid/com.example.coindroid.EUActivity}: java.lang.NullPointerException
01-06 18:05:04.734: E/AndroidRuntime(1102): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
01-06 18:05:04.734: E/AndroidRuntime(1102): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
01-06 18:05:04.734: E/AndroidRuntime(1102): at android.app.ActivityThread.access$600(ActivityThread.java:141)
01-06 18:05:04.734: E/AndroidRuntime(1102): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
01-06 18:05:04.734: E/AndroidRuntime(1102): at android.os.Handler.dispatchMessage(Handler.java:99)
01-06 18:05:04.734: E/AndroidRuntime(1102): at android.os.Looper.loop(Looper.java:137)
01-06 18:05:04.734: E/AndroidRuntime(1102): at android.app.ActivityThread.main(ActivityThread.java:5041)
01-06 18:05:04.734: E/AndroidRuntime(1102): at java.lang.reflect.Method.invokeNative(Native Method)
01-06 18:05:04.734: E/AndroidRuntime(1102): at java.lang.reflect.Method.invoke(Method.java:511)
01-06 18:05:04.734: E/AndroidRuntime(1102): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-06 18:05:04.734: E/AndroidRuntime(1102): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-06 18:05:04.734: E/AndroidRuntime(1102): at dalvik.system.NativeStart.main(Native Method)
01-06 …