从Android按钮上删除边距

Question

How can I remove the default margin Android buttons are using? I want the buttons to have full width (no space at all between the edge of the screen and the button) and no space between them. I am not setting any padding but they seem to have one.

I am using "Theme.AppCompat.Light.NoActionBar" as my app theme parent.

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

Answer 1

在xml按钮中按以下方式使用，然后更改此更改的其他功能，以使其显示方式。

style="?android:attr/buttonBarButtonStyle"

Answer 2

I had the same problem. The default button comes with margins. Set a button property like this:

android:layout_marginTop="-3dp"

Do the same for the left, right, and bottom margins. Or define a new drawable with these parameters:

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle"
    android:padding="10dp"
    >
    <solid android:color="@color/colorButtonGray"/>
    <corners
        android:bottomRightRadius="2dp"
        android:bottomLeftRadius="2dp"
        android:topLeftRadius="2dp"
        android:topRightRadius="2dp"/>
</shape> 

The custom shape will not have any built in margins.

Answer 3

您可以使用android：minHeight = 0 android：minWidth = 0从按钮中删除多余的空白。