The application has stopped unexpectedly. Please try again
===

I am  getting the same error everytime I launch it after making changes. here is the LogCat report: I am unable to understand the errors,, Please help.

07-28 12:37:20.831: E/AndroidRuntime(302): FATAL EXCEPTION: main
07-28 12:37:20.831: E/AndroidRuntime(302): java.lang.RuntimeException: Unable to start               activity ComponentInfo{karan.app.caloriecalculator/karan.app.caloriecalculator.Main}: java.lang.NullPointerException
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.os.Handler.dispatchMessage(Handler.java:99)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.os.Looper.loop(Looper.java:123)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.app.ActivityThread.main(ActivityThread.java:4627)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at java.lang.reflect.Method.invokeNative(Native Method)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at java.lang.reflect.Method.invoke(Method.java:521)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at dalvik.system.NativeStart.main(Native Method)
07-28 12:37:20.831: E/AndroidRuntime(302): Caused by: java.lang.NullPointerException
07-28 12:37:20.831: E/AndroidRuntime(302): 	at karan.app.caloriecalculator.Main.get_all_ids(Main.java:94)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at karan.app.caloriecalculator.Main.onCreate(Main.java:27)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-28 12:37:20.831: E/AndroidRuntime(302): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
07-28 12:37:20.831: E/AndroidRuntime(302): 	... 11 more
