Android - 按下列表项视图时的弹出菜单? [英] Android - Popup menu when list item view pressed?

问题描述

我想实现一个类似于谷歌游戏商店的弹出菜单，如下所示.

i would like to implement a popup menu similar to google's play store as shown below.

所以基本上根据我的理解，我需要一个活动和这个活动的布局，其中定义了一个列表视图.我需要创建我的自定义适配器.另外，我需要创建一个包含信息和视图(带有 3 个点)的列表布局，作为启动弹出菜单的按钮?我在这里看到的问题是，如何仅为该视图创建侦听器，以及如何在列表视图中引用该特定列表项的值.

so basically from what i understand, i'll need an activity and a layout for this activity with a listview defined in it. i need to create my custom adapter. also, i need to create a list layout would contain the information and a view (with the 3 dots) that will serve as the button to launch the popup menu? the issue that i'm seeing here is that how do i create a listener for this view only and how do i reference the value for that specific list item in the list view.

我还没有任何可用的代码，因为我还没有开始任何与此相关的事情.我目前正在获取理论上的信息，但如果需要，我将创建一个示例代码.

i don't have any code available yet as i haven't started anything related to this. i'm currently getting info in theory for now but if required i will create a sample code.

谢谢.

推荐答案

使用 popup菜单通过以下三个步骤创建菜单非常简单:

Using popup menu it's quite simple to create a menu with these three steps:

1 - 使用 OnClickListener 或我更喜欢从布局 xml 中将点击侦听器添加到菜单按钮:

1 - Add a click listener to the menu button using OnClickListener or as i prefer from the layout xml:

<ImageButton android:id="@+id/menu_button" android:onClick="showMenu" ... />

2 - 创建菜单布局 menu_layout.xml:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/item_settings"
        android:showAsAction="ifRoom|withText"
        android:title="Settings"
        android:visible="true"/>
    <item
        android:id="@+id/item_about"
        android:showAsAction="ifRoom|withText"
        android:title="About"
        android:visible="true"/>
</menu>

3 - 创建一个弹出菜单，扩展 xml 布局并显示它:

3 - Create a popup menu, inflate the xml layout and show it:

public void showMenu (View view)
{
    PopupMenu menu = new PopupMenu (this, view);
    menu.setOnMenuItemClickListener (new PopupMenu.OnMenuItemClickListener ()
    {
        @Override
        public boolean onMenuItemClick (MenuItem item)
        {
            int id = item.getItemId();
            switch (id)
            {
                case R.id.item_settings: Log.i (Tag, "settings"); break;
                case R.id.item_about: Log.i (Tag, "about"); break;
            }
            return true;
        }
    });
    menu.inflate (R.menu.menu_layout);
    menu.show();
}

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