Java android DialogFragment mDialog为空导致异常
我正在开发android纸牌游戏,我正在使用DialogFragment渲染一些图像,并告诉玩家对对手采取行动 下面的代码执行了很多次,完全没有错误,但是在发生5到10次以下异常之后Java android DialogFragment mDialog为空导致异常,java,android,nullpointerexception,android-dialogfragment,Java,Android,Nullpointerexception,Android Dialogfragment,我正在开发android纸牌游戏,我正在使用DialogFragment渲染一些图像,并告诉玩家对对手采取行动 下面的代码执行了很多次,完全没有错误,但是在发生5到10次以下异常之后 E/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.arabdealgame.arabdealgame, PID: 8359
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)
上面的例外说明了这一点
android.app.DialogFragmentmDialog在第行为空
mDialog.setContentView(视图)
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());
我正在从这里实例化对话框
错误发生在
布尔executePendingTransactions=fm.executePendingTransactions()强>
为了解决这个问题,我在一篇相关的帖子中建议添加了这个。
在添加此语句之前,发生错误时没有在我的包中声明任何类
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");
}
});
为了在我的对话框中进行调试,此方法已被重写
@Override
public void onActivityCreated(Bundle savedInstanceState) {
MyLog.i(TAG, "onActivityCreated: ----------------------------------");
super.onActivityCreated(savedInstanceState);
}
执行以下操作将不再显示此异常:
public class RentCardDialog extends DialogFragment {
private static final String TAG = "RentCardDialog";
private TextView title1;
private TextView title2;
private TextView title1TxtView;
private TextView title2TxtView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.dialog_rent_card, container, false);
title1 = (TextView) rootView.findViewById(R.id.rent_card_dialog_title1);
title2 = (TextView) rootView.findViewById(R.id.rent_card_dialog_title2);
title1TxtView = (TextView) rootView.findViewById(R.id.rent_card_dialog_title1);
title2TxtView = (TextView) rootView.findViewById(R.id.rent_card_dialog_title2);
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState); // Will now complete and not crash
try {
buildUserOptions();
MyLog.i(TAG, "onCreateView: ---------------------------3");
player2Fragment.setExecuteCallback(new CallbackInterface() {
@Override
public void execute() {
player2Fragment.refreshPlayerData(player2);
}
});
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.dialog_rent_card, container, false);
title1 = (TextView) rootView.findViewById(R.id.rent_card_dialog_title1);
title2 = (TextView) rootView.findViewById(R.id.rent_card_dialog_title2);
title1TxtView = (TextView) rootView.findViewById(R.id.rent_card_dialog_title1);
title2TxtView = (TextView) rootView.findViewById(R.id.rent_card_dialog_title2);
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState); // Will now complete and not crash
try {
buildUserOptions();
MyLog.i(TAG, "onCreateView: ---------------------------3");
player2Fragment.setExecuteCallback(new CallbackInterface() {
@Override
public void execute() {
player2Fragment.refreshPlayerData(player2);
}
});
现在,通过执行以下操作,它可以完美地工作。可能的重复对于我的情况来说不是一个解决方案,因为异常发生在android库中,而不是我的代码。当初始化
mDialog
变量时,您可以发布一个片段吗?