如何创建将在水平维度上填充的对话框 [英] How to create dialog which will be full in horizontal dimension

问题描述

当我在布局中使用它指定这个对话框 android：layout_width =match_parent我得到这个对话框：

我需要对话框会更广泛任何想法？

解决方案

您可以通过抓取 Window 对话框使用，并重置宽度。以下是一个简单的例子：

  //首先显示对话框
 AlertDialog dialog = new AlertDialog.Builder（this）
 .setTitle（Test Dialog）
 .setMessage（This should expand to the full width）
 .show（）; 
 //抓住对话框的窗口，并更改宽度
 WindowManager.LayoutParams lp = new WindowManager.LayoutParams（）; 
窗口窗口= dialog.getWindow（）; 
 lp.copyFrom（window.getAttributes（））; 
 //这使得对话框占据了整个宽度
 lp.width = WindowManager.LayoutParams.MATCH_PARENT; 
 lp.height = WindowManager.LayoutParams.WRAP_CONTENT; 
 window.setAttributes（lp）; 
  

这是最终结果。请注意，如果您需要微调事物（如更改背景等），则可以在对话框中执行更多样式。当我以前不得不这样做时，我通常会使用这个方法，并在构建器类中使用 setView（）自定义对话框中使用的布局。 p>

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

I need dialog which will be wider. Any ideas?

解决方案

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);

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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