Android 如何在微调器中设置下拉箭头?

Android 如何在微调器中设置下拉箭头?,android,android-spinner,Android,Android Spinner,我试图用下拉箭头设置微调器,但我无法修复,有人能帮我吗?我已经附上了源代码 我的类文件: import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditTe

我试图用下拉箭头设置微调器,但我无法修复,有人能帮我吗?我已经附上了源代码

我的类文件:

    import android.os.Bundle;
    import android.view.View;
    import android.widget.AdapterView;
    import android.widget.ArrayAdapter;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Spinner;
    import android.widget.AdapterView.OnItemSelectedListener;
    import android.widget.Toast;

        public class topup extends Activity  {
            Spinner spinner,spin1,spin2,spin3;
                EditText ed,ed1;
                Button btn;
                List<String> list, list1,list2,list3;
                    private String[] countries_list={"01","02","03","04","05","06","07","08","09","10","11","12"};

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


                        spinner = (Spinner) findViewById(R.id.spinner1);
                        spin1= (Spinner) findViewById(R.id.spinner2);
                        spin2= (Spinner) findViewById(R.id.spinner3);
                        spin3= (Spinner) findViewById(R.id.spinner4);
                        ed = (EditText) findViewById(R.id.editText3);

                        list = new ArrayList<String>();
                        list.add("");
                        list.add("select");
                        list.add("01");
                        list.add("02");
                        list.add("03");
                        list.add("04");
                        list.add("05");
                        list.add("06");
                        list.add("07");
                        list.add("08");
                        list.add("09");
                        list.add("10");
                        list.add("11");
                        list.add("12");

                        ArrayAdapter<String> adp = new ArrayAdapter<String>
                            (this, android.R.layout.simple_spinner_item, list);
                        //adp.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

                        spinner.setAdapter(adp);


                        spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

                            //@Override
                            public void onItemSelected(AdapterView<?> parent, View arg1,int arg2, long arg3) {
                                // TODO Auto-generated method stub
                                 String item = spinner.getItemAtPosition(1).toString();
                                 //Toast.makeText(spinner.getContext(), "Selected: " + item, Toast.LENGTH_LONG).show();
                                 String ss=spinner.getSelectedItem().toString();
                                 String 
                            }


                            public void onNothingSelected(AdapterView<?> arg0) {
                                // TODO Auto-generated method stub

                            }
                        });
导入android.os.Bundle;
导入android.view.view;
导入android.widget.AdapterView;
导入android.widget.ArrayAdapter;
导入android.widget.Button;
导入android.widget.EditText;
导入android.widget.Spinner;
导入android.widget.AdapterView.OnItemSelectedListener;
导入android.widget.Toast;
公共类加满扩展了活动{
微调器微调器,微调1,微调2,微调3;
编辑文本,ed1;
按钮btn;
列表,列表1,列表2,列表3;
私有字符串[]国家/地区列表={“01”、“02”、“03”、“04”、“05”、“06”、“07”、“08”、“09”、“10”、“11”、“12”};
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.topup);
微调器=(微调器)findViewById(R.id.spinner1);
spin1=(Spinner)findViewById(R.id.spinner2);
spin2=(Spinner)findViewById(R.id.spinner3);
spin3=(微调器)findViewById(R.id.spinner4);
ed=(EditText)findViewById(R.id.editText3);
列表=新的ArrayList();
列表。添加(“”);
列表。添加(“选择”);
列表。添加(“01”);
列表。添加(“02”);
列表。添加(“03”);
列表。添加(“04”);
列表。添加(“05”);
列表。添加(“06”);
列表。添加(“07”);
列表。添加(“08”);
列表。添加(“09”);
列表。添加(“10”);
列表。添加(“11”);
列表。添加(“12”);
ArrayAdapter adp=新的ArrayAdapter
(这是android.R.layout.simple\u微调器\u项,列表);
//adp.setDropDownViewResource(android.R.layout.simple\u微调器\u下拉菜单\u项);
旋转器.设置适配器(adp);
spinner.setOnItemSelectedListener(新的OnItemSelectedListener(){
//@凌驾
已选择公共视图(AdapterView父视图、视图arg1、整型arg2、长型arg3){
//TODO自动生成的方法存根
String item=spinner.getItemAtPosition(1.toString();
//Toast.makeText(spinner.getContext(),“Selected:”+项,Toast.LENGTH\u LONG.show();
字符串ss=spinner.getSelectedItem().toString();
一串
}
未选择公共无效(AdapterView arg0){
//TODO自动生成的方法存根
}
});
我的xml文件:

<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/back1"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="20dp" 
        android:background="@drawable/red">

        <Spinner
            android:id="@+id/spinner1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:dropDownWidth="fill_parent" 
         />

    </LinearLayout>

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignLeft="@+id/linearLayout1"
        android:layout_alignRight="@+id/linearLayout1"
        android:layout_below="@+id/linearLayout1"
        android:layout_marginTop="25dp"
        android:background="@drawable/red"
        android:ems="10"
        android:hint="enter card number" >

        <requestFocus />
    </EditText>

    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignLeft="@+id/editText1"
        android:layout_alignRight="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="33dp"
        android:orientation="horizontal" 
        android:background="@drawable/red">

        <Spinner
            android:id="@+id/spinner3"
            android:layout_width="72dp"
            android:layout_height="wrap_content"
             />

        <Spinner
            android:id="@+id/spinner2"
            android:layout_width="72dp"
            android:layout_height="wrap_content" 
            />

        <EditText
            android:id="@+id/editText2"
            android:layout_width="22dp"
            android:layout_height="match_parent"
            android:layout_weight="0.18"
            android:ems="10"
            android:hint="enter cvv" />

    </LinearLayout>

    <LinearLayout
        android:id="@+id/linearLayout3"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignParentLeft="true"
        android:layout_alignRight="@+id/linearLayout2"
        android:layout_below="@+id/linearLayout2"
        android:layout_marginTop="26dp"
        android:orientation="vertical"
        android:background="@drawable/red" >
    </LinearLayout>

    <Spinner
        android:id="@+id/spinner4"
        android:layout_width="15dp"
        android:layout_height="18dp"
        android:layout_alignBottom="@+id/linearLayout3"
        android:layout_alignLeft="@+id/linearLayout3"
        android:layout_alignRight="@+id/linearLayout3"
        android:layout_alignTop="@+id/linearLayout3"

      />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/linearLayout3"
        android:layout_marginTop="18dp"
        android:text="Add Amount" 
        android:background="@drawable/buttonsty"/>



</RelativeLayout>

将下拉箭头图像设置为微调器,如下所示:

<Spinner
    android:id="@+id/Exam_Course"
    android:layout_width="320dp"
    android:background="@drawable/spinner_bg"
    android:layout_height="wrap_content"/>


此处android:background=“@drawable/spinner\u bg”spinner\u bg是下拉箭头图像。

复制并粘贴此xml而不是您的xml

<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/back1"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="20dp" 
        android:background="@drawable/red">

        <Spinner
            android:id="@+id/spinner1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:dropDownWidth="fill_parent" 
            android:background="@android:drawable/btn_dropdown"
         />

    </LinearLayout>

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignLeft="@+id/linearLayout1"
        android:layout_alignRight="@+id/linearLayout1"
        android:layout_below="@+id/linearLayout1"
        android:layout_marginTop="25dp"
        android:background="@drawable/red"
        android:ems="10"
        android:hint="enter card number" >

        <requestFocus />
    </EditText>

    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignLeft="@+id/editText1"
        android:layout_alignRight="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="33dp"
        android:orientation="horizontal" 
        android:background="@drawable/red">

        <Spinner
            android:id="@+id/spinner3"
            android:layout_width="72dp"
            android:layout_height="wrap_content"
            android:background="@android:drawable/btn_dropdown"
             />

        <Spinner
            android:id="@+id/spinner2"
            android:layout_width="72dp"
            android:layout_height="wrap_content" 
            android:background="@android:drawable/btn_dropdown"
            />

        <EditText
            android:id="@+id/editText2"
            android:layout_width="22dp"
            android:layout_height="match_parent"
            android:layout_weight="0.18"
            android:ems="10"
            android:hint="enter cvv" />

    </LinearLayout>

    <LinearLayout
        android:id="@+id/linearLayout3"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignParentLeft="true"
        android:layout_alignRight="@+id/linearLayout2"
        android:layout_below="@+id/linearLayout2"
        android:layout_marginTop="26dp"
        android:orientation="vertical"
        android:background="@drawable/red" >
    </LinearLayout>

    <Spinner
        android:id="@+id/spinner4"
        android:layout_width="15dp"
        android:layout_height="18dp"
        android:layout_alignBottom="@+id/linearLayout3"
        android:layout_alignLeft="@+id/linearLayout3"
        android:layout_alignRight="@+id/linearLayout3"
        android:layout_alignTop="@+id/linearLayout3"
        android:background="@android:drawable/btn_dropdown"
      />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/linearLayout3"
        android:layout_marginTop="18dp"
        android:text="Add Amount" 
        android:background="@drawable/buttonsty"/>
</RelativeLayout>

复制并粘贴此xml以显示为下拉列表,并更改下拉列表的颜色

 <?xml version="1.0" encoding="UTF-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/back1"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<LinearLayout
    android:id="@+id/linearLayout1"
    android:layout_width="wrap_content"
    android:layout_height="55dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_marginTop="20dp" 
    android:background="@drawable/red">

    <Spinner android:id="@+id/spinner1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:dropDownWidth="fill_parent" 
        android:popupBackground="@drawable/textbox"
        android:spinnerMode="dropdown"
        android:background="@drawable/drop_down_large"

     />

</LinearLayout>

<EditText
    android:id="@+id/editText1"
    android:layout_width="wrap_content"
    android:layout_height="55dp"
    android:layout_alignLeft="@+id/linearLayout1"
    android:layout_alignRight="@+id/linearLayout1"
    android:layout_below="@+id/linearLayout1"
    android:layout_marginTop="25dp"
    android:background="@drawable/red"
    android:ems="10"
    android:hint="enter card number" >

    <requestFocus />
</EditText>

<LinearLayout
    android:id="@+id/linearLayout2"
    android:layout_width="wrap_content"
    android:layout_height="55dp"
    android:layout_alignLeft="@+id/editText1"
    android:layout_alignRight="@+id/editText1"
    android:layout_below="@+id/editText1"
    android:layout_marginTop="33dp"
    android:orientation="horizontal" 
    android:background="@drawable/red">

    <Spinner
        android:id="@+id/spinner3"
        android:layout_width="72dp"
        android:layout_height="wrap_content"
         android:popupBackground="@drawable/textbox"
        android:spinnerMode="dropdown"
        android:background="@drawable/drop_down_large"
         />

    <Spinner
        android:id="@+id/spinner2"
        android:layout_width="72dp"
        android:layout_height="wrap_content" 
        android:popupBackground="@drawable/textbox"
        android:spinnerMode="dropdown"
        android:background="@drawable/drop_down_large"
        />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="22dp"
        android:layout_height="match_parent"
        android:layout_weight="0.18"
        android:ems="10"
        android:hint="enter cvv" />

</LinearLayout>

<LinearLayout
    android:id="@+id/linearLayout3"
    android:layout_width="wrap_content"
    android:layout_height="55dp"
    android:layout_alignParentLeft="true"
    android:layout_alignRight="@+id/linearLayout2"
    android:layout_below="@+id/linearLayout2"
    android:layout_marginTop="26dp"
    android:orientation="vertical"
    android:background="@drawable/red" >
</LinearLayout>

<Spinner
    android:id="@+id/spinner4"
    android:layout_width="15dp"
    android:layout_height="18dp"
    android:layout_alignBottom="@+id/linearLayout3"
    android:layout_alignLeft="@+id/linearLayout3"
    android:layout_alignRight="@+id/linearLayout3"
    android:layout_alignTop="@+id/linearLayout3"
    android:popupBackground="@drawable/textbox"
        android:spinnerMode="dropdown"
        android:background="@drawable/drop_down_large"/>

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_below="@+id/linearLayout3"
    android:layout_marginTop="18dp"
    android:text="Add Amount"
    android:background="@drawable/buttonsty"/>

作为后续行动,有人问我如何更改微调器图标以获得如下内容:

 <LinearLayout

        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/background"
        android:orientation="horizontal">

        <Spinner
            android:id="@+id/spinner"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_weight="4"
            android:gravity="center"
            android:background="@android:color/transparent"
            android:spinnerMode="dropdown" />

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:onClick="showDropDown"
            android:src="@drawable/ic_chevron_down_blue" />

    </LinearLayout>

一种非常简单的方法是使用自定义微调器项布局:

Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
        this,
        R.layout.view_spinner_item,
        ITEMS
);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
(对于打开状态,只需使用
android.R.layout.simple\u微调器\u下拉菜单\u项
,或者如果您想调整微调器的各个方面,可以创建一个自定义布局。)


要使背景和颜色看起来更漂亮,请设置微调器的
android:background
android:popupBackground
。如果您想知道上面屏幕截图中的自定义字体,可以使用一种简单的方法将微调器+下拉箭头图像包装在布局中。将微调器的背景设置为透明的so默认箭头图标被隐藏。如下所示:

 <LinearLayout

        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/background"
        android:orientation="horizontal">

        <Spinner
            android:id="@+id/spinner"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_weight="4"
            android:gravity="center"
            android:background="@android:color/transparent"
            android:spinnerMode="dropdown" />

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:onClick="showDropDown"
            android:src="@drawable/ic_chevron_down_blue" />

    </LinearLayout>

这里background.xml是一个可绘制的文件,用于生成长方体类型的背景

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@android:color/transparent" />
    <corners android:radius="2dp" />
    <stroke
        android:width="1dp"
        android:color="#BDBDBD" />
</shape>

上面的代码生成这种类型的微调器和图标


基本上,需要为微调器创建自定义背景。它应该是这样的:

spinner_background.xml

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

    <item>

        <layer-list>

            <item>
                <color
                    android:color="@android:color/white"/>
            </item>

            <item>
                <bitmap
                    android:gravity="center_vertical|right"
                    android:src="@drawable/ic_arrow_drop_down_black_24dp"/>
            </item>

        </layer-list>

    </item>

</selector>

然后为微调器创建自定义样式,将上述选择器指定为背景:

<style name="Widget.App.Spinner" parent="@style/Widget.AppCompat.Spinner">
    <item name="overlapAnchor">true</item>
    <item name="android:background">@drawable/spinner_background</item>
</style>

真的
@可绘制/微调器\u背景
最后,在应用程序主题中,如果希望在整个应用程序中应用,则应覆盖两个属性:

<item name="spinnerStyle">@style/Widget.App.Spinner</item>
<item name="android:spinnerStyle">@style/Widget.App.Spinner</item>
@style/Widget.App.Spinner
@style/Widget.App.Spinner

基本上就是这样。

从API级别16及以上,您可以使用以下代码更改spinner中的下拉图标。 只需转到setonItemSelectedListener中的onItemSelected,然后像这样更改textview selected的可绘制性

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
  // give the color which ever you want to give to spinner item in this line of code               
//API Level 16 and above only. 
           ((TextView)parent.getChildAt(position)).setCompoundDrawablesRelativeWithIntrinsicBounds(null,null,ContextCompat.getDrawable(Activity.this,R.drawable.icon),null);
 //Basically itis changing the drawable of textview, we have change the textview left drawable.

}
        @Override
        public void onNothingSelected(AdapterView<?> parent) {

}
    });
spinner.setOnItemSelectedListener(新的AdapterView.OnItemSelectedListener(){
@凌驾
已选择公共视图(AdapterView父视图、视图视图、整型位置、长id){
//在这行代码中,为微调器项指定您想要的颜色
//仅API级别16及以上
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
  // give the color which ever you want to give to spinner item in this line of code               
//API Level 16 and above only. 
           ((TextView)parent.getChildAt(position)).setCompoundDrawablesRelativeWithIntrinsicBounds(null,null,ContextCompat.getDrawable(Activity.this,R.drawable.icon),null);
 //Basically itis changing the drawable of textview, we have change the textview left drawable.

}
        @Override
        public void onNothingSelected(AdapterView<?> parent) {

}
    });
<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
style="?android:attr/spinnerDropDownItemStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="none"
android:minHeight="?android:attr/listPreferredItemHeight" />
ArrayList<String> spinnerArray = new ArrayList<String>();
spinnerArray.add("Item No. 1");
spinnerArray.add("Item No. 2");
spinnerArray.add("Item No. 3");
spinnerArray.add("Item No. 4");
Spinner spinner = new Spinner(getActivity());
spinner.setTag("some_id");
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_dropdown_item, spinnerArray);                  spinnerArrayAdapter.setDropDownViewResource(R.layout.spinner_item);
spinner.setAdapter(spinnerArrayAdapter);
<?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:type="linear" />

            <stroke android:width="1dp" android:color="@color/colorBackground" />

            <corners android:radius="2dp" />

            <padding android:bottom="1dp" android:left="1dp" android:right="1dp" android:top="1dp" />
        </shape></item>
        <item android:right="5dp">
            <bitmap android:gravity="center_horizontal|right" android:src="@drawable/expand_icon">
            <padding android:right="2dp" />
        </bitmap>
        </item>
    </layer-list></item>

</selector>
<style name="spinner_style">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">wrap_content</item>
<item name="android:background">@drawable/gradient_spinner</item>
<item name="android:layout_margin">1dp</item>
<item name="android:paddingLeft">5dp</item>
<item name="android:paddingRight">5dp</item>
<item name="android:paddingTop">5dp</item>
<item name="android:paddingBottom">5dp</item>
</style>
<Spinner
   android:id="@+id/agent_id_spinner"
   android:layout_width="match_parent"
   android:layout_height="40dp"
   android:textSize="@dimen/title_text_view"
   style="@style/spinner_style"  />
<?xml version="1.0" encoding="utf-8"?>
<layer-list android:opacity="transparent" xmlns:android="http://schemas.android.com/apk/res/android">
            <item android:width="100dp" android:gravity="right" android:start="300dp">
                <bitmap android:src="@drawable/down_button_dummy_dummy" android:gravity="center"/>
            </item>
</layer-list>
<android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardUseCompatPadding="true"
        app:cardElevation="5dp"
        >
     <Spinner
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:background="@drawable/dummy">

     </Spinner>
    </android.support.v7.widget.CardView>
<item>
    <layer-list>
        <item>
            <shape android:shape="rectangle">
                <gradient android:angle="270" android:centerColor="#65FFFFFF" android:centerY="0.2" android:endColor="#00FFFFFF" android:startColor="@color/light_gray" />
                <stroke android:width="1dp" android:color="@color/darkGray" />
                <corners android:radius="@dimen/edit_text_corner_radius" />
            </shape>
        </item>

        <item
            android:right="5dp"
            android:gravity="center|right"
            android:drawable="@drawable/gardify_spinner_dropdown_icon"/>

    </layer-list>
</item>