Кому не сложно гляньте что за ошибка при запуске приложения

[iandryxa]

Сделал небольшое приложение калькулятор как практика для себя, но пи первом же запуске приложение падает с ошибкой
Log Cat :
02-20 17:39:25.804: E/AndroidRuntime(333): FATAL EXCEPTION: main
02-20 17:39:25.804: E/AndroidRuntime(333): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example1.calc/com.example1.calc.MainActivity}: java.lang.NullPointerException
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.os.Handler.dispatchMessage(Handler.java:99)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.os.Looper.loop(Looper.java:123)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.main(ActivityThread.java:3683)
02-20 17:39:25.804: E/AndroidRuntime(333): at java.lang.reflect.Method.invokeNative(Native Method)
02-20 17:39:25.804: E/AndroidRuntime(333): at java.lang.reflect.Method.invoke(Method.java:507)
02-20 17:39:25.804: E/AndroidRuntime(333): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-20 17:39:25.804: E/AndroidRuntime(333): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-20 17:39:25.804: E/AndroidRuntime(333): at dalvik.system.NativeStart.main(Native Method)
02-20 17:39:25.804: E/AndroidRuntime(333): Caused by: java.lang.NullPointerException
02-20 17:39:25.804: E/AndroidRuntime(333): at com.example1.calc.MainActivity.showHistory(MainActivity.java:120)
02-20 17:39:25.804: E/AndroidRuntime(333): at com.example1.calc.MainActivity.onCreate(MainActivity.java:51)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
02-20 17:39:25.804: E/AndroidRuntime(333): ... 11 more

[KamiSempai]

Выделил красным. Учитесь читать логи.

Сделал небольшое приложение калькулятор как практика для себя, но пи первом же запуске приложение падает с ошибкой
Log Cat :
02-20 17:39:25.804: E/AndroidRuntime(333): FATAL EXCEPTION: main
02-20 17:39:25.804: E/AndroidRuntime(333): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example1.calc/com.example1.calc.MainActivity}: java.lang.NullPointerException
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.os.Handler.dispatchMessage(Handler.java:99)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.os.Looper.loop(Looper.java:123)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.main(ActivityThread.java:3683)
02-20 17:39:25.804: E/AndroidRuntime(333): at java.lang.reflect.Method.invokeNative(Native Method)
02-20 17:39:25.804: E/AndroidRuntime(333): at java.lang.reflect.Method.invoke(Method.java:507)
02-20 17:39:25.804: E/AndroidRuntime(333): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-20 17:39:25.804: E/AndroidRuntime(333): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-20 17:39:25.804: E/AndroidRuntime(333): at dalvik.system.NativeStart.main(Native Method)
02-20 17:39:25.804: E/AndroidRuntime(333): Caused by: java.lang.NullPointerException
02-20 17:39:25.804: E/AndroidRuntime(333): at com.example1.calc.MainActivity.showHistory(MainActivity.java:120)
02-20 17:39:25.804: E/AndroidRuntime(333): at com.example1.calc.MainActivity.onCreate(MainActivity.java:51)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-20 17:39:25.804: E/AndroidRuntime(333): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
02-20 17:39:25.804: E/AndroidRuntime(333): ... 11 more

[Foenix]

по второй красной строчке два щелчка и сиди думай.

[iandryxa]

ок спасибо)