TimePicker null pointer exception when pressing buttons plus or minus

Question

The problem happens only when I try to force the layout to show the picker with increment and decrement buttons. So when I use this code in my fragment and press "+" or "-" the app crashes:

final Context contextThemeWrapper = new ContextThemeWrapper(getActivity(), R.style.cust_dialog); 
LayoutInflater localInflater = inflater.cloneInContext(contextThemeWrapper);

If I comment the code line above, all work fine.
this is the cust_dialog:

<style name="cust_dialog" parent="@android:style/Theme.NoTitleBar.Fullscreen"></style>

This is the stacktrace:

09-06 01:15:35.947: E/AndroidRuntime(19858): FATAL EXCEPTION: main
09-06 01:15:35.947: E/AndroidRuntime(19858): java.lang.NullPointerException
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.widget.TimePicker.updateInputState(TimePicker.java:580)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.widget.TimePicker.access$000(TimePicker.java:56)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.widget.TimePicker$2.onValueChange(TimePicker.java:150)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.widget.NumberPicker.notifyChange(NumberPicker.java:1776)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.widget.NumberPicker.setValueInternal(NumberPicker.java:1562)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.widget.NumberPicker.changeValueByOne(NumberPicker.java:1592)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.widget.NumberPicker.access$200(NumberPicker.java:90)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.widget.NumberPicker$1.onClick(NumberPicker.java:633)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.view.View.performClick(View.java:4202)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.view.View$PerformClick.run(View.java:17340)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.os.Handler.handleCallback(Handler.java:725)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.os.Handler.dispatchMessage(Handler.java:92)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.os.Looper.loop(Looper.java:137)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at android.app.ActivityThread.main(ActivityThread.java:5039)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at java.lang.reflect.Method.invokeNative(Native Method)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at java.lang.reflect.Method.invoke(Method.java:511)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
09-06 01:15:35.947: E/AndroidRuntime(19858):    at dalvik.system.NativeStart.main(Native Method)

How Do I solve this?

Answer 1

Add tag within the timepicker. it works for me:

<TimePicker android:id="@+id/timePicker"     
     android:layout_width="wrap_content"    
     android:layout_height="wrap_content"    
     android:layout_gravity="center_horizontal">  
 <requestFocus />  
</TimePicker>  

Reference: http://blog.csdn.net/ljb_blog/article/details/9153435