android - EditText 背景不工作

Question

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/parent"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/transparent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <LinearLayout
        android:layout_width="0px"
        android:layout_height="0px"
        android:focusable="true"
        android:focusableInTouchMode="true" />

    <AutoCompleteTextView
        android:id="@+id/autoComplete"
        android:layout_width="fill_parent"
        android:layout_height="48dp"
        android:background="@drawable/black_rounded_borders" />

</RelativeLayout>

I added the useless LinearLayout just to avoid initial focus on the AutoCompleteTextView when the Activity is launched

drawable/black_rounded_borders.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <solid android:color="#FFFFFFFF" />

    <stroke
        android:width="2dp"
        android:color="@color/selector_black_border" />


    <corners
        android:bottomLeftRadius="5dp"
        android:bottomRightRadius="5dp"
        android:topLeftRadius="5dp"
        android:topRightRadius="5dp" />

</shape>

color/selector_black_border.xml

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

    <item android:state_focused="true" android:color="#FF269ff5"/>
    <item android:state_pressed="true" android:color="#FF269ff5"/>
    <item android:state_selected="true" android:color="#FF269ff5"/>
    <item android:state_focused="false" android:color="#FF000000"/>
    <item android:state_pressed="false" android:color="#FF000000"/>
    <item android:state_selected="false" android:color="#FF000000"/>

</selector>

Activity

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    autoComplete = (AutoCompleteTextView) findViewById(R.id.autoComplete);
    Log.d("hasFocus", autoComplete.hasFocus() + "");
    Log.d("isSelected", autoComplete.isSelected() + "");
    Log.d("isPressed", autoComplete.isPressed() + "");
    //All the above are false
}

Though all the states related the blue(#FF269ff5) color are false. I still get the border in blue color. Also if I change the order of states in the color/selector_black_border.xml file, like all false first and then trues, then I get the black border. Its like only the first color works.

我错过了什么？

谢谢。

Answer 1

我不能把它放入评论中，因为它太大了，但我找到了对此的解释 here ，其中指出:

A ColorStateList不能作为 <solid> 的属性传递在 XML 定义中，或者实际上是 <shape> 的任何属性.此属性作为颜色资源从 XML 中扩展出来，然后传递给 Drawable 的 setColor()。方法，它只接受一个 ARGB 值。

只有一种 Drawable 实例被设计为根据状态包含和呈现多个项目，那就是 StateListDrawable ，这就是给 <selector> 充气时得到的结果.所有其他 Drawable 实例都只是该集合的成员或独立绘制。

另请注意，膨胀的 <shape>项目实际上是 GradientDrawable而不是 ShapeDrawable .如果您查看 inflate() GradientDrawable的方法| in the source ，您可以获得有关如何使用每个属性的所有详细信息。

鸣谢@Devunwired。

但是，在此基础上，您可以创建不同的形状(每次都是矩形)，每个形状都具有以下属性。在 drawable/black_rounded_borders.xml 中使用以下代码看看它是否按预期工作:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <item>
        <selector xmlns:android="http://schemas.android.com/apk/res/android" >
            <item android:state_pressed="true">
                <shape android:shape="rectangle" >
                    <solid android:color="#FFFFFFFF" />

                    <stroke
                        android:width="2dp"
                        android:color="#FF269ff5" />

                    <corners
                        android:bottomLeftRadius="5dp"
                        android:bottomRightRadius="5dp"
                        android:topLeftRadius="5dp"
                        android:topRightRadius="5dp" />
                </shape>
            </item>
            <item android:state_focused="true">
                <shape android:shape="rectangle" >
                    <solid android:color="#FFFFFFFF" />

                    <stroke
                        android:width="2dp"
                        android:color="#FF269ff5" />

                    <corners
                        android:bottomLeftRadius="5dp"
                        android:bottomRightRadius="5dp"
                        android:topLeftRadius="5dp"
                        android:topRightRadius="5dp" />
                </shape>
            </item>
            <item android:state_selected="true">
                <shape android:shape="rectangle" >
                    <solid android:color="#FFFFFFFF" />

                    <stroke
                        android:width="2dp"
                        android:color="#FF269ff5" />

                    <corners
                        android:bottomLeftRadius="5dp"
                        android:bottomRightRadius="5dp"
                        android:topLeftRadius="5dp"
                        android:topRightRadius="5dp" />
                </shape>
            </item>
            <item>
                <shape android:shape="rectangle" >
                    <solid android:color="#FFFFFFFF" />

                    <stroke
                        android:width="1dp"
                        android:color="#FF000000" />

                    <corners
                        android:bottomLeftRadius="5dp"
                        android:bottomRightRadius="5dp"
                        android:topLeftRadius="5dp"
                        android:topRightRadius="5dp" />
                </shape>
            </item>
        </selector>
    </item>

</layer-list>

很抱歉发了这么长的帖子，而且我不知道它是否有效，但我找不到另一种发布方式。