public class Pointcard_TabType extends TabActivity {
 
 private TextView titlebarText;
 
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
  requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
  getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);
        
  titlebarText = (TextView)findViewById(R.id.titlebar_text);
  titlebarText.setText("");      // 오류 나는 부분


LogCat 내용

10-07 06:49:14.421: WARN/dalvikvm(3784): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
10-07 06:49:14.430: ERROR/AndroidRuntime(3784): Uncaught handler: thread main exiting due to uncaught exception
10-07 06:49:14.440: ERROR/AndroidRuntime(3784): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.pointcardMain/com.example.pointcardMain.Pointcard_TabType}: java.lang.NullPointerException
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.app.ActivityThread.access$2200(ActivityThread.java:119)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.os.Looper.loop(Looper.java:123)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.app.ActivityThread.main(ActivityThread.java:4363)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at java.lang.reflect.Method.invokeNative(Native Method)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at java.lang.reflect.Method.invoke(Method.java:521)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at dalvik.system.NativeStart.main(Native Method)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784): Caused by: java.lang.NullPointerException
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at com.example.pointcardMain.Pointcard_TabType.onCreate(Pointcard_TabType.java:23)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
10-07 06:49:14.440: ERROR/AndroidRuntime(3784):     ... 11 more


오류나는 부분을 주석처리하면 타이틀바가 빈칸으로 보이지만...프로그램은 잘 돌아갑니다.

TabActivity를 상속 받지 않는 엑티비티에서는 위와 같은 방법으로 하면 잘 되던데...TabActivity 를 상속받은 곳에서는 안되네요..ㅠㅠ

고수님들...방법 좀 알려주세요.
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