CardView的背景，将到Android回应：state_selected和android：STATE_ pressed

问题描述：

我指的答案在 http://stackoverflow.com/a/24475228/72437

建议的回答是从Android的使用可绘制：安卓？ATTR / selectableItemBackground

The proposed answer is using drawable from Android : ?android:attr/selectableItemBackground

这是发生什么事，当我点击卡上的项目。需要注意的是，通过绘制来自Android的，安卓state_selected =真正的（当的setSelected（真））会没有任何色彩变化效果。

This is what happen when I tap on the card item. Note that, by using drawable from Android, android:state_selected="true" (when setSelected(true)) will not have any color change effect.

所以，我想用我自己定义的绘制，这样

Hence, I would like to use my own defined drawable so that

在这看起来更好。
能够处理机器人：state_selected =真正的

下面是我的code

<?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/selected_background" />
    <item android:state_selected="true" android:drawable="@drawable/selected_background" />
    <item android:drawable="@android:color/transparent" />

</selector>

selected_background.xml

<shape android:shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#ffffe1b3" />
    <stroke
        android:width="1px"
        android:color="#fff76d3c" />
</shape>

card_row.xml

<!-- A CardView that contains a TextView -->
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card_view"
    android:layout_marginLeft="5dp"
    android:layout_marginRight="5dp"
    android:layout_marginTop="5dp"
    android:layout_marginBottom="5dp"
    android:clickable="true"
    android:foreground="@drawable/statelist_item_background"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:padding="5dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <TextView
            android:id="@+id/txt_label_item"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            tools:text="Item Number One" />

        <TextView
            android:id="@+id/txt_date_time"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            tools:text="Item Number One" />
    </LinearLayout>
</android.support.v7.widget.CardView>

在上网卡项目我长preSS和执行 childView.setSelected（真）; ，这是我的结局

When I long press on the card item and perform childView.setSelected(true);, here's my outcome.

我的所有卡上的内容（的TextView S）被阻止。我怎样才能避免这样？

All my card content (TextViews) are blocked. How can I avoid such?

请注意，当你使用安卓背景=@可绘制/ statelist_item_background与 CardView 本身，什么都不会发生了。

Note, when you use android:background="@drawable/statelist_item_background" with CardView itself, nothing will happen.

不过，如果你使用安卓背景=@可绘制/ statelist_item_background与 CardView 的的LinearLayout ，您将获得以下不完善结果

However, if you use android:background="@drawable/statelist_item_background" with CardView's LinearLayout, you will get the following imperfect outcome.

突出显示的颜色不覆盖整个卡

看起来这是 CardView 的限制 - 的 HTTPS：//$c$c.google.com/p/android/issues/detail ID = 78198 使用前台的解决方法是不是一种选择，因为它占地面积卡上的内容。

Seem like this is limitation of CardView - https://code.google.com/p/android/issues/detail?id=78198 Using "foreground" as workaround is not an option as it covers card content.

答

试验了一段时间后，我可以pretty的很多结论，这是当前限制 CardView - HTTPS：//$c$c.google。 COM / P /安卓/问题/详细信息？ID = 78198

After experimenting for quite some time, I can pretty much conclude that this is limitation of current CardView - https://code.google.com/p/android/issues/detail?id=78198

不要使用 CardView 的前景的解决方法。虽然它被广泛地被提出，它只是不工作！

Don't use CardView's foreground workaround. Although it is widely being proposed, it just don't work!

我的建议是，应避免使用 CardView 如果你需要一个定制的选择。其更换 LayerDrawable 。这就是我所做的一切。

My suggestion is, avoid using CardView if you need a customized selector. Replace it LayerDrawable. Here's what I had done.

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape>
            <padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
            <solid android:color="@android:color/transparent" />
            <stroke
                android:width="1dp"
                android:color="#ffededed" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <item>
        <shape>
            <padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
            <stroke
                android:width="1dp"
                android:color="#ffe8e8e8" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <item>
        <shape>
            <padding android:top="0dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
            <stroke
                android:width="1dp"
                android:color="#ffe1e1e1" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <item>
        <shape>
            <padding android:top="0dp" android:right="0dp" android:bottom="1dp" android:left="0dp" />
            <stroke
                android:width="1dp"
                android:color="#ffdbdbdb" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <item>
        <shape>
            <padding android:top="0dp" android:right="0dp" android:bottom="1dp" android:left="0dp" />
            <stroke
                android:width="1dp"
                android:color="#ffd5d5d5" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <!--
    <item>
        <shape>
            <padding android:top="0dp" android:right="0dp" android:bottom="1dp" android:left="0dp" />
            <stroke
                android:width="1dp"
                android:color="#ffcfcfcf" />
            <corners android:radius="2dp" />
        </shape>
    </item>
    -->

    <item>
        <shape >
            <solid android:color="#ffffffff" />
            <corners android:radius="2dp" />
        </shape>
    </item>
</layer-list>

card_selected.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape>
            <padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
            <stroke
                android:width="1dp"
                android:color="#ffededed" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <item>
        <shape>
            <padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
            <stroke
                android:width="1dp"
                android:color="#ffe8e8e8" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <item>
        <shape>
            <padding android:top="0dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
            <stroke
                android:width="1dp"
                android:color="#ffe1e1e1" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <item>
        <shape>
            <padding android:top="0dp" android:right="0dp" android:bottom="1dp" android:left="0dp" />
            <stroke
                android:width="1dp"
                android:color="#ffdbdbdb" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <item>
        <shape>
            <padding android:top="0dp" android:right="0dp" android:bottom="1dp" android:left="0dp" />
            <stroke
                android:width="1dp"
                android:color="#ffd5d5d5" />
            <corners android:radius="2dp" />
        </shape>
    </item>

    <!--
    <item>
        <shape>
            <padding android:top="0dp" android:right="0dp" android:bottom="1dp" android:left="0dp" />
            <stroke
                android:width="1dp"
                android:color="#ffcfcfcf" />
            <corners android:radius="2dp" />
        </shape>
    </item>
    -->

    <item>
        <shape>
            <solid android:color="#ffffe1b3" />
            <stroke
                android:width="1px"
                android:color="#fff76d3c" />
            <corners android:radius="2dp" />
        </shape>
    </item>
</layer-list>

statelist_item_background.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"
    android:exitFadeDuration="@android:integer/config_mediumAnimTime">

    <item android:state_pressed="true" android:drawable="@drawable/card_selected" />     <!-- pressed -->
    <item android:state_selected="true" android:drawable="@drawable/card_selected" />     <!-- pressed -->

    <item android:drawable="@drawable/card" />

</selector>

layout.xml

<!-- A CardView that contains a TextView -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:padding="10dp"
    android:layout_marginLeft="5dp"
    android:layout_marginRight="5dp"
    android:layout_marginTop="5dp"
    android:layout_marginBottom="5dp"
    android:background="@drawable/statelist_item_background"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true" >

    <TextView
        android:id="@+id/txt_label_item"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        tools:text="Item Number One" />

    <TextView
        android:id="@+id/txt_date_time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        tools:text="Item Number One" />
</LinearLayout>

您将得到pretty的不错的结果。

You will get the pretty nice outcome.