动作条COMPAT不显示下拉菜单 [英] ActionBar Compat do not show dropdown menu

问题描述

我使用的是动作条COMPAT在我的应用程序，我需要显示的下拉菜单中的动作条，当用户点击按钮。在4.x的版本中，它是确定的，但在2.3中我碰到这样的对话。

I'm using ActionBar Compat in my app and i need to show dropdown menu when user click button in actionbar. In 4.x versions it's ok, but in 2.3 i have something like dialog.

2.3截图

就像我说的，在4.x中它的确定：

Like i said, in 4.x it's ok:

下面是一些code：

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.categories, menu);
    return super.onCreateOptionsMenu(menu);
}

categories.xml

categories.xml

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

    <item
        android:id="@+id/refresh"
        android:icon="@drawable/ic_action_refresh"
        onekr:showAsAction="always"
        android:title="@string/refresh"
        android:visible="true">
    </item>
    <item
        android:id="@+id/dissmiss_page_loading"
        android:icon="@drawable/ic_action_cancel"
        onekr:showAsAction="always"
        android:title="@string/cancel"
        android:visible="false">
    </item>

    <item
        android:id="@+id/categories"
        android:icon="@drawable/ic_action_overflow"
        onekr:showAsAction="always"
        android:title="@string/categories"
        android:visible="true">
        <menu   xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:onekr="http://schemas.android.com/apk/res-auto" >
            <item
                android:id="@+id/city"
                onekr:showAsAction="always"
                android:title="@string/city"
                android:visible="true">
            </item>
            <item
                android:id="@+id/culture"
                onekr:showAsAction="always"
                android:title="@string/culture"
                android:visible="true">
            </item>
        </menu>
    </item>

</menu>

为什么这个可以吗？这可怎么解决吗？非常感谢所有谁回应！

Why does this can be? How this can be fixed? Big thanks to all who respond!

推荐答案

要避免这种情况，我们需要使用PopupMenu的！

To avoid this, we need use PopupMenu!

例如：

action_bar_buttons.xml

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

        <item
            android:id="@+id/some_other_btn"
            android:icon="@drawable/some_other_btn"
            mynamespace:showAsAction="always"
            android:title="@string/some_other_btn"
            android:visible="true">
        </item>

        <item
            android:id="@+id/open_drop_down"
            android:icon="@drawable/open_drop_down"
            mynamespace:showAsAction="always"
            android:title="@string/open_drop_down"
            android:visible="true"/>

    </menu>

drop_down_menu.xml

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

    <item
        android:id="@+id/item_1"
        android:title="@string/item_1"
        android:visible="true"
        mynamespace:showAsAction="always">
    </item>
    <item
        android:id="@+id/item_2"
        android:title="@string/item_1"
        android:visible="true"
        mynamespace:showAsAction="always">
    </item>

</menu>

在 MainActivity.java

public void showPopup(int itemId){
        View view = findViewById(itemId);
        PopupMenu popupMenu = new PopupMenu(getSupportActionBar().getThemedContext(), view);
        popupMenu.setOnMenuItemClickListener(/* drop_down item click listener */);
        popupMenu.getMenuInflater().inflate(R.menu.drop_down_menu, popupMenu.getMenu());
        popupMenu.show();
    }


@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {

    /* . . . */ 

    case R.id.open_drop_down:
        showPopup(R.id.open_drop_down);
        break;

    /* . . . */ 

    default:
        break;
    }

    return super.onOptionsItemSelected(item);
}

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