Question

在android应用上长按以弹出上下文菜单会导致空点异常崩溃。感谢所有帮助，如果需要更多代码，请告诉我，我不确定还有什么用。谢谢。

    mTitleEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            if (hasFocus) {
                if (mTitleEditText != null) {
                    Log.d("mTitleEditText", " " + mTitleEditText.getText().toString());
                    SpellingsClient.myFunction(mTitleEditText);
                }
            }
        }
    });

///这是将editText传递到我的班级的方式。除了调出该菜单外，该课程运行得非常好，所以我认为问题不在这里。

public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    Log.d("Tester", " menu " + menu + " v " + v + " menuInfo " + menuInfo + "  getMenuInflater() " +  getMenuInflater());
    MenuInflater menuInflater = getMenuInflater();

        menuInflater.inflate(R.menu.my_contextual_menu, menu);

        /*This adjusts menu items depending on if the word is inside of the personal dictionary*/
        if (itsInDict) {
            addOrRemove = "Remove from Dictionary";
        } else {
            addOrRemove = "Add to Dictionary";
        }

        /*These add in the menu items*/
        if (!itsInArray) {
            menu.add(0, 1, 1, addOrRemove);
        }
        menu.add(0, 2, 0, firstSuggestedWord);
        if (!originalWordTyped.equals("")) {
            menu.add(0, 3, 2, "Revert to: " + originalWordTyped);
        }
    }

//这是错误所在（getMenuInflator（）导致崩溃）

E / Android运行时：致命异常：主要流程：ws.xsoh.etar，PID：14389 java.lang.NullPointerException：尝试在空对象引用上调用虚拟方法“ android.view.View android.view.Window.getDecorView（）” 在android.app.Activity.initWindowDecorActionBar（Activity.java:3303）在android.app.Activity.getMenuInflater（Activity.java:4917）在com.android.calendar.SpellingsClient.onCreateContextMenu（SpellingsClient.java:426）在android.view.View.createContextMenu（View.java:14263）在com.android.internal.view.menu.ContextMenuBuilder.showPopup（ContextMenuBuilder.java:102）在com.android.internal.policy.DecorView.showContextMenuForChildInternal（DecorView.java:837）在com.android.internal.policy.DecorView.showContextMenuForChild（DecorView.java:814）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.ViewGroup.showContextMenuForChild（ViewGroup.java:971）在android.view.View.showContextMenu（View.java:7295）在android.widget.TextView.showContextMenu（TextView.java:10930）在android.view.View.performLongClickInternal（View.java:7209）在android.view.View.performLongClick（View.java:7163）在android.widget.TextView.performLongClick（TextView.java:12177）在android.view.View.performLongClick（View.java:7181）在android.view.View $ CheckForLongPress.run（View.java:27259）在android.os.Handler.handleCallback（Handler.java:883）在android.os.Handler.dispatchMessage（Handler.java:100）在android.os.Looper.loop（Looper.java:214）在android.app.ActivityThread.main（ActivityThread.java:7319）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:492）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:934）

Answer 1

您是直接从Activity或其他类中从Fragment调用吗？

如果不是来自活动，而是来自片段，请尝试以下操作：

MenuInflater inflater = getActivity().getMenuInflater();

getMenuInflater导致空指针异常

1 个答案: