android-button background drawable doesn't work

问题

this is my xml drawbale code with the name of btntheme.xml :

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/customactionbartheme_btn_default_normal_holo_light" android:state_enabled="true" android:state_window_focused="false"/>
    <item android:drawable="@drawable/customactionbartheme_btn_default_disabled_holo_light" android:state_enabled="false" android:state_window_focused="false"/>
    <item android:drawable="@drawable/customactionbartheme_btn_default_pressed_holo_light" android:state_pressed="true"/>
    <item android:drawable="@drawable/customactionbartheme_btn_default_focused_holo_light" android:state_enabled="true" android:state_focused="true"/>
    <item android:drawable="@drawable/customactionbartheme_btn_default_normal_holo_light" android:state_enabled="true"/>
    <item android:drawable="@drawable/customactionbartheme_btn_default_disabled_focused_holo_light" android:state_focused="true"/>
    <item android:drawable="@drawable/customactionbartheme_btn_default_disabled_holo_light"/>

</selector>

I've put all those images with the these names in the drawable-hdpi folder .

this is my layout and the button :

<Button
                android:id="@+id/button1"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="50"
                android:background="@drawable/btntheme"
                android:textSize="@dimen/font_size_smallerButton" />

it's not working , it doesn't change the button theme at all ?

could you help me to solve it ?

thank you

回答1:

Try out selector as below:

<!-- Active tab -->
<item android:drawable="@drawable/customactionbartheme_btn_default_normal_holo_light" android:state_focused="false" android:state_pressed="false" android:state_selected="true"/>
<!-- Inactive tab -->
<item android:drawable="@drawable/customactionbartheme_btn_default_pressed_holo_light" android:state_focused="false" android:state_pressed="false" android:state_selected="false"/>
<!-- Pressed tab -->
<item android:drawable="@drawable/customactionbartheme_btn_default_pressed_holo_light" android:state_pressed="true"/>
<!-- Selected tab (using d-pad) -->
<item android:drawable="@drawable/customactionbartheme_btn_default_disabled_holo_light" android:state_focused="true" android:state_pressed="false" android:state_selected="true"/>

</selector>

For more detail guidenc check out Custom Selector in Android

回答2:

try to add <?xml version="1.0" encoding="utf-8"?> in xml file and xml file will like

<?xml version="1.0" encoding="utf-8"?>


<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- Non focused states -->
    <item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/custom_tab_indicator_unselected" />
    <item android:state_focused="false" android:state_selected="true"  android:state_pressed="false" android:drawable="@drawable/custom_tab_indicator_selected" />

    <!-- Focused states -->
    <item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/custom_tab_indicator_unselected_focused" />
    <item android:state_focused="true" android:state_selected="true"  android:state_pressed="false" android:drawable="@drawable/custom_tab_indicator_selected_focused" />

    <!-- Pressed -->
    <!--    Non focused states -->
    <item android:state_focused="false" android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/custom_tab_indicator_unselected_pressed" />
    <item android:state_focused="false" android:state_selected="true"  android:state_pressed="true" android:drawable="@drawable/custom_tab_indicator_selected_pressed" />

    <!--    Focused states -->
    <item android:state_focused="true" android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/custom_tab_indicator_unselected_pressed" />
    <item android:state_focused="true" android:state_selected="true"  android:state_pressed="true" android:drawable="@drawable/custom_tab_indicator_selected_pressed" />
</selector>

after using this if it will not work then if possible try to use image view instead of button i think that will be work. thanks;-)

回答3:

The problem might be that the screen you are testing on does not use drawable-hdpi, so try to move the images and xml file itself to the drawable folder, if it does not exist then create it.

回答4:

Create drawable folder in res and put btntheme.xml in that folder .

回答5:

Ok I also suffered form this problem, remove android:state_focused="true" line form your code and run. hope get the answer :), (i think focus is only for input type views in my knowledge if i wrong plz guide me) for testing focus state press TAB key this is sample:-

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!--When pressed-->
    <item
        android:state_pressed="true"
        android:drawable="@drawable/btn_bg" />
    <!--focus state -->
    <item
        android:state_focused="true"
        android:state_pressed="false"
        android:drawable="@color/colorAccent"/>
    <!--Default State-->
    <item
        android:state_focused="false"
        android:state_pressed="false"
        android:drawable="@color/transparent_black" />
<!-- how confirm focus state of button -->
</selector>

来源：https://stackoverflow.com/questions/24624038/android-button-background-drawable-doesnt-work