android - 我的 ActionMode 不会在 onCreateActionMode 方法中膨胀菜单

Question

我正在尝试通过 ActionMode 在 ActionBar 中显示一个菜单项，但是 ActionMode 和菜单项都没有显示。

在 ProvasActivity 上制作我的 ListView 的 LongClickListener。

    this.listView.setLongClickable(true);
    this.listView.setOnItemLongClickListener(new OnItemLongClickListener() {
        public boolean onItemLongClick(AdapterView<?> parent, View view,
                int position, long id) {
            Log.d(null, "ListView Pressionado");

            // O action mode está ativado no momento?
            if (mActionMode != null) {
                // Cancela o evento
                return false;
            }
            selectedItem = position;

            mActionMode = ProvasActivity.this
                    .startActionMode(mActionModeCallback);
            view.setSelected(true);
            return true;
        }
    });

private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {

            // Infla o recurso do menu a ser exibido
            MenuInflater inflater = mode.getMenuInflater();
            inflater.inflate( R.menu.linha_selecionada, menu );

            Log.d(null, "Menu Inflado");

            return false;
        }

        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {

            switch (item.getItemId()) {
            case R.id.action_remover:
                show();
                // Fecha a Action quando executada
                mode.finish();
                break;

            default:
                break;
            }

            return false;
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {
            // Anula o ActionMode
            mActionMode = null;
            selectedItem = -1;

        }

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            return false;
        }

        private void show() {
            Toast.makeText(ProvasActivity.this,
                "show", Constants.TEMPO_TOAST).show();
            Log.d(null, "show()");
          }

    };

我的显示 ActionMode 项目的菜单 (layout/menu/linha_selecionada):

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:id="@+id/action_remover"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="@string/amazenadas"/>
</menu>

我的 ProvasActivity 的 View (布局/provas_armazenadas.xml):

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/white"
    android:orientation="vertical"
    android:paddingTop="50dp" >

    <ListView
        android:id="@+id/listview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@color/white"
        android:dividerHeight="4px"/>

</RelativeLayout>

我正在尝试完成 Vogella 教程。

http://www.vogella.com/tutorials/AndroidListView/article.html

Answer 1

您在 ActionMode.Callback.onCreateActionMode 中返回 false。

From the docs:

Returns

true if the action mode should be created, false if entering this modeshould be aborted