ImageButton 内的图像未缩放以填充按钮 [英] Image inside ImageButton not scaling to fill button

问题描述

我的布局包括这个 ImageButton，如图所示:

My layout includes this ImageButton as shown:

但是正如您所看到的，图像没有占据 ImageButton 的完整尺寸.

But as you can see, the image is not taking the full size of the ImageButton.

这是定义ImageButton的布局文件:

This is the layout file where the ImageButton is defined:

<ImageButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:srcCompat="@mipmap/dashboard_profile"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_marginLeft="71dp"
    android:layout_marginStart="71dp"
    android:layout_marginTop="100dp"
    android:id="@+id/imageButton3"
    android:scaleType="fitXY"/>

如您所见，我已经添加了 android:scaleType="fitXY"，但它不起作用.

As you can see, I already added android:scaleType="fitXY", but it's not working.

我也尝试在 Android Studio 的设计模式中更改按钮大小，但它不允许我更改.

I also tried to change the button size in Android Studio's design mode, but it's not letting me change.

我该如何解决这些问题?

How can I solve these problems?

推荐答案

与 Imageview 不同，Imagebutton 在图像区域周围有一个填充.这是故意的.这是因为默认按钮样式.您可以执行以下操作之一:

Unlike Imageview, Imagebutton has a padding around the image area. This is intentional. This is because of the default button style. You can do one of the following:

• 使用无边框按钮样式作为背景.
  style="?android:attr/borderlessButtonStyle"

将背景设置为空.
android:background="@null"

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