Android的 - 我怎样才能创造一个布局选择器（类似的ImageButton选择器） [英] Android - How can I create a selector for Layouts (like an ImageButton selector)

问题描述

我有一个ImageButton的和包装的LinearLayout该按钮，就像这样：

I have an ImageButton and a LinearLayout wrapping that button, like this:

<LinearLayout
        android:id="@+id/homeButtonLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/p_buttons_background"
        android:orientation="vertical" >

        <ImageButton
            android:id="@+id/homeButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10px"
            android:background="@drawable/home_icon"
            android:onClick="goBackToCameraScreen" />
    </LinearLayout>

我把周围的ImageButton的背景中的LinearLayout ，因为你可以在上面看到。

I put a background around the ImageButton in the LinearLayout, as you can see above.

我希望能够改变这种背景下（即的的LinearLayout 的背景下，ImageButton的不是背景），当用户点击的ImageButton。我能做到这一点编程，但我想这样做，通过XML。我可以很容易通过编写一个选择，这样的改变的ImageButton 的背景

I want to be able to change that background (that is, the background of the LinearLayout, not the background of the ImageButton) when the user clicks on the ImageButton. I could do that programmatically, but I want to do that via XML. I could easily change the background of the ImageButton by writing a selector, like this:

    <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_pressed="true"
       android:drawable="@drawable/button_pressed" /> <!-- pressed -->
     <item android:state_focused="true"
       android:drawable="@drawable/button_focused" /> <!-- focused -->
     <item android:drawable="@drawable/button_normal" /> <!-- default -->
</selector>

这就是 完全的我想要什么，但我想的修改的LinearLayout的背景，而不是ImageButton的背景。如何创建一个XML选择，就像上面的那个，但实际上改变的LinearLayout的背景，而在后台的ImageButton ??

That's EXACTLY what I want, except that I want to change the LinearLayout background, and not the ImageButton background. How can I create a XML selector just like the one above, but that actually changes the background of the LinearLayout instead of the ImageButton background??

感谢你在前进！ =）

推荐答案

选择设置为您的的LinearLayout 并添加的android：descendantFocusability =blocksDescendants 来了。

Set the selector to your LinearLayout and add android:descendantFocusability="blocksDescendants" to it.

在选择与布局背景替换所有按钮的背景。

In selector, replace all button backgrounds with layout backgrounds.

<LinearLayout
    android:id="@+id/homeButtonLayout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/layout_bg_selector"
    android:orientation="vertical" 
    android:descendantFocusability="blocksDescendants">

    <ImageButton
        android:id="@+id/homeButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10px"
        android:background="@drawable/home_icon"
        android:onClick="goBackToCameraScreen" />
</LinearLayout>

选择 layout_bg_selector.xml ：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_pressed="true"
       android:drawable="#F0F0F0" /> <!-- pressed -->
     <item android:state_focused="true"
       android:drawable="#00F000" /> <!-- focused -->
     <item android:drawable="#0000F0" /> <!-- default -->
</selector>

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