我最近从 Eclipse 迁移到 Android Studio，在这样做时我发现了以下错误

java.lang.UnsupportedOperationException: This is not supported, use MenuItemCompat.setOnActionExpandListener()
        at android.support.v7.internal.view.menu.MenuItemImpl.setOnActionExpandListener(MenuItemImpl.java:740)
        at biz.nickbullcomputing.bevnav.MainActivity.onCreateOptionsMenu(MainActivity.java:699)
        at android.app.Activity.onCreatePanelMenu(Activity.java:2851)
        at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:277)
        at android.support.v7.internal.view.WindowCallbackWrapper.onCreatePanelMenu(WindowCallbackWrapper.java:84)
        at android.support.v7.app.AppCompatDelegateImplBase$AppCompatWindowCallbackBase.onCreatePanelMenu(AppCompatDelegateImplBase.java:273)
        at android.support.v7.app.AppCompatDelegateImplV7.preparePanel(AppCompatDelegateImplV7.java:1111)
        at android.support.v7.app.AppCompatDelegateImplV7.doInvalidatePanelMenu(AppCompatDelegateImplV7.java:1396)
        at android.support.v7.app.AppCompatDelegateImplV7.access$100(AppCompatDelegateImplV7.java:89)
        at android.support.v7.app.AppCompatDelegateImplV7$1.run(AppCompatDelegateImplV7.java:126)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:155)
        at android.app.ActivityThread.main(ActivityThread.java:5725)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1030)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:825)

此错误似乎来 self 的主要 Activity 的以下代码 fragment

 searchItem = menu.findItem(R.id.action_search);

     searchItem.setOnActionExpandListener(new OnActionExpandListener()
     {
         @Override
         public boolean onMenuItemActionCollapse(MenuItem item) {
             townList.setVisibility(View.INVISIBLE);
             return true;       // Return true to collapse action view
         }
         @Override
         public boolean onMenuItemActionExpand(MenuItem item) {
             townList.setVisibility(View.VISIBLE);
             return true;      // Return true to expand action view
         }
     });

搜索的xml代码:

<item android:id="@+id/action_search"
    android:icon="@drawable/ic_action_search"
    android:title="@string/action_search"
    app:showAsAction="ifRoom|collapseActionView"
    app:actionViewClass="android.support.v7.widget.SearchView"/>

我的 build.gradle 文件的依赖项

dependencies {
compile 'com.android.support:support-v4:22.2.1'
compile 'com.android.support:appcompat-v7:22.0.0'
compile 'com.google.android.gms:play-services:+'

}

现在请记住，在迁移之前它运行良好，而现在却不是。我不完全确定这是怎么发生的。有什么想法吗？

最佳答案

感谢 ρяσѕρєя K 的评论，修复。非常感谢队友，谢谢!!

MenuItemCompat.setOnActionExpandListener(searchItem,
            new MenuItemCompat.OnActionExpandListener() {
                @Override
                public boolean onMenuItemActionExpand(MenuItem menuItem) {
                    // Return true to allow the action view to expand
                    townList.setVisibility(View.VISIBLE);
                    return true;
                }
                @Override
                public boolean onMenuItemActionCollapse(MenuItem menuItem) {
                    // When the action view is collapsed, reset the query
                    townList.setVisibility(View.INVISIBLE);
                    // Return true to allow the action view to collapse
                    return true;
                }
            });

关于android - java.lang.UnsupportedOperationException : This is not supported, 使用 MenuItemCompat.setOnActionExpandListener()，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32168548/