.MainActivity}: java.lang.NullPointerException 00-00 00:00:00.000: E/AndroidRuntime(00000):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:0000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:0000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at android.app.ActivityThread.access$000(ActivityThread.java:000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:0000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at android.os.Handler.dispatchMessage(Handler.java:00) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at android.os.Looper.loop(Looper.java:000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at android.app.ActivityThread.main(ActivityThread.java:0000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at java.lang.reflect.Method.invokeNative(Native Method) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at java.lang.reflect.Method.invoke(Method.java:000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:000) 00-00 00:00:00.000: E/AndroidRuntime(00000):    at dalvik.system.NativeStart.main(Native Method) 00-00 00:00:00.000: E/AndroidRuntime(00000): Caused by: java.lang.NullPointerException 00-00 00:00:00.000: E/AndroidRuntime(00000):    at android.widget.