Android SearchView setOnActionExpandListener 不起作用

Question

我需要在我的 SearchView 是否折叠时进行拦截，以便更改我的 Activity 中的一些 fragment ，即 AppCompatActivity。我使用 MenuItemCompat.setOnActionExpandListener 方法创建了一个监听器，但它似乎从未被调用过。同样奇怪的是，在我的方法 onOptionsItemSelected 中，经过一些调试后，我检查仍然在这里我不能拦截任何东西。我尝试了关于这个问题的各种方法，但没有办法解决它。这是我的代码:

menu_search_cat.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".CategoriesActivity">

<item android:id="@+id/search"
    android:title="@string/search_title"
    android:orderInCategory="1"
    android:icon="@android:drawable/ic_menu_search"
    app:showAsAction="always"
    app:actionViewClass="android.widget.SearchView"  />

类别 Activity

import android.widget.SearchView;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_categories);

    ...

    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setDisplayShowHomeEnabled(true);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.menu_search_cat, menu);

    // Associate searchable configuration with the SearchView
    SearchManager searchManager =
            (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    final SearchView searchView =
            (SearchView) menu.findItem(R.id.search).getActionView();
    searchView.setSearchableInfo(
            searchManager.getSearchableInfo(getComponentName()));

    searchView.setOnQueryTextListener(this);

    MenuItem searchItem = menu.findItem(R.id.search);
    MenuItemCompat.setOnActionExpandListener(searchItem, new     MenuItemCompat.OnActionExpandListener() {
        @Override
        public boolean onMenuItemActionExpand(MenuItem item) {
            if (BuildConfig.DEBUG) {
                Log.d(TAG, "onSearchViewExpand");
            }
            toggleDown();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.setCustomAnimations(R.anim.slide_in_from_right, R.anim.slide_out_to_left);

            SuggestionsFragment newFragment = SuggestionsFragment.newInstance(mBusiness);

            ft.replace(R.id.category_container, newFragment, "suggestionsFragment");
            ft.addToBackStack(null);

            ft.commit();
            return true;
        }

        @Override
        public boolean onMenuItemActionCollapse(MenuItem item) {
            if (BuildConfig.DEBUG) {
                Log.d(TAG, "onSearchViewCollapse");
            }
            FragmentTransaction ft =          getSupportFragmentManager().beginTransaction();
            ft.setCustomAnimations(R.anim.slide_in_from_left, R.anim.slide_out_to_right);

            MacroCategoriesFragment newFragment = new MacroCategoriesFragment();

            ft.replace(R.id.category_container, newFragment, "macrocatFragment");

            ft.commit();
            return true;
        }
    });


    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if (BuildConfig.DEBUG) {
        Log.d(TAG, "onOptionsItemSelected: "+item.toString());
    }
    // handle arrow click here
    if (item.getItemId() == android.R.id.home) {
        onBackPressed();
    }

    if (item.getItemId() == R.id.search) {
        //never work here
    }

    return super.onOptionsItemSelected(item);
}

Answer 1

我解决了这个问题:只有当我的 MenuItem 的 ActionView 在我的菜单文件中也被标记为 collapseActionView 时，onActionExpandListener 才起作用。所以我修改成这样:

<item 
  android:id="@+id/search"
  android:title="@string/search_title"
  android:orderInCategory="1"
  android:icon="@android:drawable/ic_menu_search"
  app:showAsAction="ifRoom|collapseActionView"
  app:actionViewClass="android.widget.SearchView"  />