我正在开发安卓纸牌游戏,使用DialogFragment渲染一些图片并告诉玩家对抗对手。
下面的代码片段被反复执行多次且没有任何错误,但在执行5到10次后会出现以下异常。
下面的代码片段被反复执行多次且没有任何错误,但在执行5到10次后会出现以下异常。
E/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.arabdealgame.arabdealgame, PID: 8359
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Dialog.setOwnerActivity(android.app.Activity)' on a null object reference
at android.app.DialogFragment.onActivityCreated(DialogFragment.java:482)
at com.arabdealgame.activities.dialog.RentCardDialog.onActivityCreated(RentCardDialog.java:342)
at android.app.Fragment.performActivityCreated(Fragment.java:2362)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1014)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1171)
at android.app.BackStackRecord.run(BackStackRecord.java:815)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1578)
at android.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:563)
at com.arabdealgame.bo.Actions.RentActionCard$5.run(RentActionCard.java:315)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
上述异常提示说,在android.app.DialogFragment内部,mDialog在代码行mDialog.setContentView(view);处为null。
android.app.DialogFragment
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (!mShowsDialog) {
return;
}
View view = getView();
if (view != null) {
if (view.getParent() != null) {
throw new IllegalStateException("DialogFragment can not be attached to a container view");
}
mDialog.setContentView(view);
}
mDialog.setOwnerActivity(getActivity());
我正在这里实例化对话框,错误发生在
boolean executePendingTransactions = fm.executePendingTransactions(); 这是我根据相关帖子建议添加的语句,以解决问题。 在添加此语句之前,错误没有指出我的包下的任何类。
RentActionCard.java
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
MyLog.i(TAG, "run: --------------------------1");
FragmentManager fm = getActivity().getFragmentManager();
MyLog.i(TAG, "run: --------------------------2");
RentCardDialog rentCardDialog = new RentCardDialog();
MyLog.i(TAG, "run: --------------------------3");
if (!GameInfo.getCurrentPlayer().isUser()) {
MyLog.i(TAG, "run: --------------------------4");
rentCardDialog.setAgainstUser(true);
}
rentCardDialog.show(fm, "ccc");
boolean executePendingTransactions = fm.executePendingTransactions();
MyLog.d(TAG, "RentActionCard - executePendingTransactions : " + executePendingTransactions);
MyLog.i(TAG, "run: --------------------------5");
}
});
这个方法被重写了,是为了在我的对话框内进行调试。
@Override
public void onActivityCreated(Bundle savedInstanceState) {
MyLog.i(TAG, "onActivityCreated: ----------------------------------");
super.onActivityCreated(savedInstanceState);
}
mDialog
变量的代码片段? - payloc91