如何实现不拉伸的 android:background? [英] How to implement an android:background that doesn't stretch?

问题描述

我发现这个很棒的线程描述了如何吃蛋糕，也吃蛋糕"，即使用图像作为 Button 而不是 ImageButton(不允许 SetText()、调整大小等).

I found this great thread describing how to "eat the cake and have it too", i.e. use image for a Button instead of ImageButton (which doesn't allow SetText(), resizing, etc.).

这是通过使用 View 属性实现的:

This is achieved by using the View attribute:

android:background="@drawable/bgimage"

唯一的问题是它会拉伸图像以适应按钮大小.

The only problem with this is that it stretches the image to fit the button size.

没有硬编码固定按钮大小(以像素为单位！)，有没有办法告诉 Android 不完全拉伸背景图像并裁剪或填充它?

Short of hard-coding a fixed button size (in pixels!), is there a way to tell Android not to stretch the background image at all and either crop or pad it?

推荐答案

你应该使用 ImageView 如果你不想它拉伸.背景图像将始终拉伸以适应视图.您需要将其设置为 Drawable 以强制对象的图像方面.

You should use ImageView if you don't want it to stretch. Background images will always stretch to fit the view. You need to set it as a Drawable to force the image aspect to the object.

否则，如果您坚持按钮的想法，那么您将需要强制缩放按钮以防止图像拉伸.

Otherwise, if you are sticking with the Button idea, then you will need to force the scaling in the button to prevent the image from stretching.

代码:

onCreate(Bundle bundle) {
  // Set content layout, etc up here

  // Now adjust button sizes
  Button b = (Button) findViewById(R.id.somebutton);
  int someDimension = 50; //50pixels
  b.setWidth(someDimension);
  b.setHeight(someDimension);
}

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