在使用 scaleDialogFragment.dismiss();时报异常:
if (adminDialogFragment != null ) {
adminDialogFragment.dismiss();
}
java.lang.NullPointerException: Attempt to invoke virtual method 'android.app.FragmentTransaction android.app.FragmentManager.beginTransaction()' on a null object reference
at android.app.DialogFragment.dismissInternal(DialogFragment.java:296)
at android.app.DialogFragment.dismiss(DialogFragment.java:267)
at com.arcsoft.renmaituan.activity.RegisterAndRecognizeActivity$7.onFinish(RegisterAndRecognizeActivity.java:1097)
at android.os.CountDownTimer$1.handleMessage(CountDownTimer.java:127)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:173)
at android.app.ActivityThread.main(ActivityThread.java:6698)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)
解决方式:
if (adminDialogFragment != null &&adminDialogFragment.isAdded()) {
adminDialogFragment.dismiss();
}