android - 设置为切换按钮背景的图像被拉伸(Image set as background of toggle button is stretched android)

Question

I have a Toggle Button as:

(我有一个切换按钮：)

<ToggleButton
            android:id="@+id/tv_pmpSwitch"
            android:layout_width="0dp"
            android:layout_weight="0.1"
            android:layout_height="wrap_content"
            android:background="@drawable/toggle_view"
            android:layout_gravity="center_vertical"
            android:gravity="center"
            android:textOn=""
            android:textOff=""
            android:focusable="false"
            android:focusableInTouchMode="false"
            android:layout_centerVertical="true"
            android:paddingTop="16dp"
            android:layout_marginLeft="16dp"
            /> 

And my toggle_view drawable is :

(我的toggle_view可绘制对象是：)

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- When selected, use grey -->
    <item android:drawable="@drawable/ic_list_action"
        android:state_checked="true" />
    <!-- When not selected, use white-->
    <item android:drawable="@drawable/ic_grid_action"
        android:state_checked="false"/>
</selector>

I don't understand why the image in background is stretched ??

(我不明白为什么背景图片会被拉伸？)

I've tried various size images.

(我尝试了各种尺寸的图像。)

  ask by AnswerDroid translate from so

Answer 1

<ToggleButton
            android:id="@+id/tv_pmpSwitch"
            android:layout_width="0dp"
            android:layout_height="28dp"
            android:layout_weight="0.1"
            android:background="@drawable/toggle_view"                
            android:textOff=""
            android:textOn="" />

Try this on your code and adjust only layout height parameter!

(在您的代码上尝试此操作，并仅调整布局高度参数！)

EDIT

(编辑)

The way to get a non stretched image is using a bitmap and not a drawable.

(获取非拉伸图像的方法是使用位图而不是可绘制的。)

use following as your xml as your background.

(使用以下作为您的xml作为背景。)

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item >
        <bitmap android:src="@drawable/ic_list_action"
          android:gravity="center_vertical|left" />
    </item>
    <item>
        <bitmap android:src="@drawable/ic_grid_action"
          android:gravity="center_vertical|left" />
    </item>
</layer-list>