Android應用程序慣於在模擬器上運行（P 1000）:(

我是新來的Android編程，我寫了一個應用程序添加兩個整數，但在執行時我收到一個錯誤「應用程序（com.android.xxxx）有意外停止日誌是貼在下面，請幫我調試和理解這個問題：。Android應用程序慣於在模擬器上運行（P 1000）:(

11-08 02:02:17.671: E/AndroidRuntime(328): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
11-08 02:02:17.671: E/AndroidRuntime(328): at dalvik.system.NativeStart.main(Native Method) 
11-08 02:02:17.671: E/AndroidRuntime(328): Caused by: java.lang.NullPointerException 
11-08 02:02:17.671: E/AndroidRuntime(328): at com.android.add.AdditionActivity.onCreate(AdditionActivity.java:17) 
11-08 02:02:17.671: E/AndroidRuntime(328): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
11-08 02:02:17.671: E/AndroidRuntime(328): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
11-08 02:02:17.671: E/AndroidRuntime(328): ... 11 more 
11-08 02:35:42.461: D/AndroidRuntime(1153): Shutting down VM 
11-08 02:35:42.461: W/dalvikvm(1153): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
11-08 02:35:42.501: E/AndroidRuntime(1153): FATAL EXCEPTION: main 
11-08 02:35:42.501: E/AndroidRuntime(1153): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.add/com.android.add.AdditionActivity}: java.lang.NullPointerException 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.os.Handler.dispatchMessage(Handler.java:99) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.os.Looper.loop(Looper.java:123) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at java.lang.reflect.Method.invokeNative(Native Method) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at java.lang.reflect.Method.invoke(Method.java:521) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at dalvik.system.NativeStart.main(Native Method) 
11-08 02:35:42.501: E/AndroidRuntime(1153): Caused by: java.lang.NullPointerException 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at com.android.add.AdditionActivity.onCreate(AdditionActivity.java:17) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
11-08 02:35:42.501: E/AndroidRuntime(1153):  ... 11 more

來源

2011-11-08 user1035287

其顯示NullPointerException java.lang.RuntimeException：無法啓動活動ComponentInfo {com.android.add/com.android.add.AdditionActivity}：java.lang.NullPointerException 11-08 02：35：42.501：E/AndroidRuntime（1153）：在 –

在你的代碼中看到你的第17條數字。你的代碼出錯了，或者在這裏發佈你的代碼。 –

您對AdditionActivity.java，行17一個NullPointerException防止從啓動你的活動

來源

2011-11-08 10:00:12 d4n3

第17行是右括號:(上一行是btn.setOnClickListener（this）。 – user1035287

btn是否設置爲任何內容？ – d4n3

Android應用程序慣於在模擬器上運行（P 1000）:(

回答

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