Android的 - 巴顿与缩放背景图片 [英] Android - Scaling of Button with background image

问题描述

我有一个屏幕布局，其中包括一个线性布局（水平）在3 Button控件。每个按钮有一个背景图像。请参阅下面的XML：

I have a screen layout that includes 3 Button controls contained within a linear layout (horizontal). The Buttons each have a background image. See XML below :

<LinearLayout
    android:id="@+id/notificationform_llt_ApprovalBtns"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:orientation="horizontal"
    android:paddingLeft="8dp"
    android:paddingRight="8dp" >

    <Button
        android:id="@+id/notificationform_btn_Approve"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:background="@drawable/btn_approve"
        android:onClick="btnApprove_Click" />
    <Button
        android:id="@+id/notificationform_btn_Reject"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:background="@drawable/btn_reject"
        android:onClick="btnReject_Click" />
    <Button
        android:id="@+id/notificationform_btn_Delegate"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:background="@drawable/btn_delegate"
        android:onClick="btnDelegate_Click" />
</LinearLayout>

画面我的银河W¯¯手机（3.7）上看起来不错，但对我的Nexus上运行时7按键被拉伸水平而不是垂直方向，因此看起来被挤压。如果我的理解对不对这两种器件具有类似的决议无一不寻找图像，这是我的图像存储在哪里。我试图使图像9补丁但这并没有任何区别的绘制，华电国际的文件夹。我怎样才能使图像按比例缩放的高度和宽度是多少？

The screen looks great on my Galaxy W phone (3.7"), but when running on my Nexus 7 the buttons are stretched horizontally but not vertically and therefore look squashed. If I understand it right both these devices have similar resolution and both look for images in the drawable-hdpi folder which is where my images are stored. I've tried making the images 9-patch but this didn't make any difference. How can I make the images scale proportionally on both height and width?

推荐答案

按钮得到横向拉长，因为的LinearLayout 设置为填写父，每个按钮具有权重，使他们舒展。高度设置为 WRAP_CONTENT ，并没有任何内容。图像设置为背景，不会有多大按钮是任何影响。

The buttons get stretched horizontally because the LinearLayout is set to fill parent, and each button have weights that make them stretch. The heights are set to wrap_content, and there isn't any content. The image is set as a background, which won't have any effect on how big the button is.

这也可能是最好的更改按钮在ImageButtons并使用的android：SRC 而不是的android：背景。例如：

It's probably best you change the Buttons to ImageButtons and use android:src instead of android:background. For example :

<ImageButton
    android:id="@+id/notificationform_btn_Approve"
    android:layout_width="0dp"
    android:layout_weight="1"
    android:layout_height="wrap_content"
    android:src="@drawable/btn_approve"
    android:onClick="btnApprove_Click" />

这篇关于Android的 - 巴顿与缩放背景图片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！