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android：有关于为应用程序创建菜单的教程吗？

发布于 2024-08-28 04:42:50 字数 123 浏览 10 评论 0原文

我需要一个非常简单的菜单，它可能只包含一个或两个项目：设置/选项，按下其中之一应该显示一些客户定义的参数（称为对话框），例如显示的结果数。有没有关于创建此类菜单的好的教程？我看过android中的“记事本”示例，它并没有真正的帮助。

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对风讲故事 2024-09-04 04:42:50

根据您的要求，这些是“选项菜单”或“上下文菜单”，创建它们非常容易。以下是开发人员网站上页面的链接，解释了如何做菜单。

以下是选项菜单代码的基本示例，改编自我的游戏：

public boolean onCreateOptionsMenu(Menu menu){
    // Define your menu, giving each button a unique identifier numbers
    // (MENU_PAUSE, etc)
    // This is called only once, the first time the menu button is clicked
    menu.add(0, MENU_PAUSE, 0, "Pause").setIcon(android.R.drawable.ic_media_pause);         
    menu.add(0, MENU_RESUME, 0, "Resume").setIcon(android.R.drawable.ic_media_play);
    return true;
}


public boolean onPrepareOptionsMenu(Menu menu){
    // This is called every time the menu button is pressed. In my game, I
    // use this to show or hide the pause/resume buttons depending on the
    // current state
}


public boolean onOptionsItemSelected(MenuItem item){
    // and this is self explanatory
    boolean handled = false;

    switch (item.getItemId()){
    case MENU_PAUSE:
        pauseGame();
        handled = true;
        break;

    case MENU_RESUME:
        resumeGame();
        handled = true;
        break;
    }
    return handled;
}

编辑：有关 AlertDialogs 的一些详细信息，请参阅注释

Depending on what you're asking for, these are either "Options Menus" or "Context Menus", and creating them is very easy. Here's a link to the page on the Developers' Website explaining how to do menus.

Here's a basic example of code for options menus, adapted from my game:

public boolean onCreateOptionsMenu(Menu menu){
    // Define your menu, giving each button a unique identifier numbers
    // (MENU_PAUSE, etc)
    // This is called only once, the first time the menu button is clicked
    menu.add(0, MENU_PAUSE, 0, "Pause").setIcon(android.R.drawable.ic_media_pause);         
    menu.add(0, MENU_RESUME, 0, "Resume").setIcon(android.R.drawable.ic_media_play);
    return true;
}


public boolean onPrepareOptionsMenu(Menu menu){
    // This is called every time the menu button is pressed. In my game, I
    // use this to show or hide the pause/resume buttons depending on the
    // current state
}


public boolean onOptionsItemSelected(MenuItem item){
    // and this is self explanatory
    boolean handled = false;

    switch (item.getItemId()){
    case MENU_PAUSE:
        pauseGame();
        handled = true;
        break;

    case MENU_RESUME:
        resumeGame();
        handled = true;
        break;
    }
    return handled;
}

Edit: See the comments for some details on AlertDialogs

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