Android 将箭头图像添加到微调器
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Android add arrow image to spinner
提问by user3781214
I have created a background drawable that I use for a spinner. I would like to now but an arrow image inside this background. I have tried things like android:drawableRight="arrowimage", but this does not seem to show anything. Does anyone know how I can include an image in my custom background for a spinner?
我创建了一个用于微调器的背景可绘制对象。我现在想在这个背景中添加一个箭头图像。我尝试过类似 android:drawableRight="arrowimage" 的方法，但这似乎没有显示任何内容。有谁知道如何在我的自定义背景中为微调器添加图像？
回答by Aniruddha
Create an XML in a drawable folder with any name for example spinner_bg.xmland add this following lines
在 drawable 文件夹中创建一个具有任何名称的 XML，例如spinner_bg.xml并添加以下几行
<?xml version="1.0"
encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<layer-list>
<item>
<shape>
<gradient android:angle="90"
android:endColor="#ffffff"
android:startColor="#ffffff"
android:type="linear" />
<stroke android:width="1dp"
android:color="#504a4b" />
<corners android:radius="5dp" />
<padding android:bottom="3dp"
android:left="3dp"
android:right="3dp"
android:top="3dp" />
</shape>
</item>
<item>
<bitmap android:gravity="bottom|right"
android:src="@drawable/spinner_ab_default_holo_dark_am" />
// you can use any other image here, instead of default_holo_dark_am
</item>
</layer-list>
</item>
</selector>
Add the following lines to your styles.xml which is inside values folder
将以下行添加到您的styles.xml 中，它位于values 文件夹中
<style name="spinner_style" >
<item name="android:background">@drawable/spinner_bg</item>
<item name="android:layout_marginLeft">10dp</item>
<item name="android:layout_marginRight">10dp</item>
<item name="android:layout_marginBottom">10dp</item>
<item name="android:paddingLeft">8dp</item>
<item name="android:paddingTop">5dp</item>
<item name="android:paddingBottom">5dp</item>
</style>
Now add this style to your spinner as
现在将此样式添加到您的微调器中
<Spinner android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@style/spinner_style"
android:popupBackground="#cccccc" />
回答by takahawk
Aniruddha's solution worked fine for me, when I used JellyBean (4.2.2) or Kitkat (4.4). But unfortunately on Marshmallow (6.0) I have an exception, possible cause explained here: Using drawable resources
当我使用 JellyBean (4.2.2) 或 Kitkat (4.4) 时，Aniruddha 的解决方案对我来说效果很好。但不幸的是，在 Marshmallow (6.0) 上我有一个例外，可能的原因在这里解释：使用可绘制资源
I ended up just making a trick and place spinner to LinearLayout with ImageView like this:
我最终只是制作了一个技巧并将微调器放置到带有 ImageView 的 LinearLayout 中，如下所示：
<LinearLayout
android:id="@+id/spinner_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center">
<Spinner
android:id="@+id/spinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/your_arrow_drawable"/>
</LinearLayout>
回答by Rob
This works for me. You may be missing the default state. Without posting your code it's hard to tell.
这对我有用。您可能缺少默认状态。不发布您的代码很难说。
<!-- theme -->
<item name="android:dropDownSpinnerStyle">@style/mySpinnerStyle</item>
<!-- style -->
<style name="mySpinnerStyle" parent="android:Widget.Holo.Spinner">
<item name="android:background">@drawable/mySpinner_background</item>
</style>
<!-- mySpinner_background -->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false"
android:drawable="@drawable/mySpinner_disabled" />
<item android:state_pressed="true"
android:drawable="@drawable/mySpinner_pressed" />
<item android:state_pressed="false" android:state_focused="true"
android:drawable="@drawable/mySpinner_focused" />
<item android:drawable="@drawable/mySpinner_default" />
</selector>
回答by siddharth patel
Set your Image ICON On Spinner :
在 Spinner 上设置您的图像图标：
<item>
<layer-list>
<item>
<color android:color="@android:color/white" />
</item>
<item>
<bitmap android:gravity="center_vertical|right" android:src="@drawable/down_arrow" />
</item>
</layer-list>
</item>
回答by Jasmine John
This has worked for me:
这对我有用：
<Spinner
android:id="@+id/spinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Light"
android:spinnerMode="dropdown" />
