如何创建将在水平维度上充满的对话框

问题描述

当我在布局中使用时，它指定了这个对话框 android:layout_width="match_parent" 我得到了这个对话框:

When I use in layout, which specifies this dialog android:layout_width="match_parent" I get this dialog:

我需要更宽的对话框.有什么想法吗?

I need dialog which will be wider. Any ideas?

推荐答案

您可以通过抓取对话框使用的 Window 对象并重置宽度来实现.这是一个简单的例子:

You can do that by grabbing the Window object that the dialog uses, and resetting the width. Here's a simple example:

//show the dialog first
AlertDialog dialog = new AlertDialog.Builder(this)
        .setTitle("Test Dialog")
        .setMessage("This should expand to the full width")
        .show();
//Grab the window of the dialog, and change the width
WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
Window window = dialog.getWindow();
lp.copyFrom(window.getAttributes());
//This makes the dialog take up the full width
lp.width = WindowManager.LayoutParams.MATCH_PARENT;
lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
window.setAttributes(lp);

这是最终结果.请注意，如果您需要微调某些内容(例如更改背景等)，您可以对对话框进行更多样式设置.当我过去不得不这样做时，我通常使用这种方法，并在构建器类上使用 setView() 自定义对话框中使用的布局.

Here's the end result. Note that there's a lot more styling you can do to the dialog if you need to fine tune things (like change the background, etc). When I've had to do this in the past, I usually use this method, and customize the layout used in the dialog with setView() on the builder class.

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