如何在Android中自定义Spinner

Question

我想在a的下拉列表中添加一个自定义高度Spinner,比如30dp,我想隐藏下拉列表中的分隔符Spinner.

到目前为止,我尝试实现以下样式Spinner:

<style name="spinner_style">
        <item name="android:paddingLeft">0dp</item>
        <item name="android:dropDownWidth">533dp</item>
        <item name="android:showDividers">none</item>
        <item name="android:dividerHeight">0dp</item>
        <item name="android:popupBackground">@drawable/new_bg</item>
        <item name="android:dropDownHeight">70dp</item>
        <item name="android:scrollbarAlwaysDrawVerticalTrack">true</item>
        <item name="android:dropDownSelector">@android:color/white</item>
 </style>

我的微调器的代码是:

<Spinner
            android:id="@+id/pioedittxt5"
            android:layout_width="543dp"
            android:layout_height="63dp"
            android:layout_toRightOf="@+id/piotxt5"
            android:background="@drawable/spinner"
            style="@style/spinner_style"
            android:dropDownVerticalOffset="-53dp"
            android:spinnerMode="dropdown"
            android:drawSelectorOnTop="true"
            android:entries="@array/travelreasons"
            android:prompt="@string/prompt" />

但似乎没有任何效果.

Answer 1

使用自定义布局为您的微调器创建自定义适配器.

Spinner spinner = (Spinner) findViewById(R.id.pioedittxt5);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
        R.array.travelreasons, R.layout.simple_spinner_item);
adapter.setDropDownViewResource(R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);

R.layout.simple_spinner_item

<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@android:id/text1"
    style="@style/spinnerItemStyle"
    android:maxLines="1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ellipsize="marquee" />

R.layout.simple_spinner_dropdown_item

<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@android:id/text1"
    style="@style/spinnerDropDownItemStyle"
    android:maxLines="1"
    android:layout_width="match_parent"
    android:layout_height="?android:attr/dropdownListPreferredItemHeight"
    android:ellipsize="marquee" />

在样式中,根据您的要求添加自定义尺寸和高度.

 <style name="spinnerItemStyle" parent="android:Widget.TextView.SpinnerItem">

  </style>

  <style name="spinnerDropDownItemStyle" parent="android:TextAppearance.Widget.TextView.SpinnerItem">

  </style>

Answer 2

您可以创建完全自定义的微调器设计,如

第1步:在drawable文件夹中,为backgroundr的边框创建background.xml.

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@android:color/transparent" />
<corners android:radius="5dp" />
<stroke
android:width="1dp"
   android:color="@android:color/darker_gray" />
</shape>

第2步:对于微调器的布局设计,请使用此下拉图标或任何图像drop.png

 <RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginRight="3dp"
    android:layout_weight=".28"
    android:background="@drawable/spinner_border"
    android:orientation="horizontal">

    <Spinner
        android:id="@+id/spinner2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_gravity="center"
        android:background="@android:color/transparent"
        android:gravity="center"
        android:layout_marginLeft="5dp"
        android:spinnerMode="dropdown" />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_gravity="center"
        android:src="@mipmap/drop" />

</RelativeLayout>

最后看起来像下面的图像,它在圆形区域无处可点击,无需为imageView点击Lister.

步骤3:对于下拉设计,从Dropdown ListView中删除该行并更改背景颜色,创建自定义适配器,如

Spinner spinner = (Spinner) findViewById(R.id.spinner1);
String[] years = {"1996","1997","1998","1998"};
ArrayAdapter<CharSequence> langAdapter = new ArrayAdapter<CharSequence>(getActivity(), R.layout.spinner_text, years );
langAdapter.setDropDownViewResource(R.layout.simple_spinner_dropdown);
mSpinner5.setAdapter(langAdapter);

在布局文件夹中创建R.layout.spinner_text.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layoutDirection="ltr"
android:id="@android:id/text1"
style="@style/spinnerItemStyle"
android:singleLine="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="marquee"
android:paddingLeft="2dp"
/>

在layout文件夹中创建simple_spinner_dropdown.xml

<?xml version="1.0" encoding="utf-8"?>
<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
style="@style/spinnerDropDownItemStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="marquee"
android:paddingBottom="5dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="5dp"
android:singleLine="true" />

在样式中,您可以根据需要添加自定义尺寸和高度.

<style name="spinnerItemStyle" parent="android:Widget.TextView.SpinnerItem">
</style>

<style name="spinnerDropDownItemStyle" parent="android:TextAppearance.Widget.TextView.SpinnerItem">
</style>

最后看起来像

根据要求,您可以通过更改simple_spinner_dropdown.xml的背景颜色或文本颜色来更改下拉颜色的背景颜色和文本

Answer 3

我到目前为止找到的最优雅,最灵活的解决方案是:http: //android-er.blogspot.sg/2010/12/custom-arrayadapter-for-spinner-with.html

基本上,请按照下列步骤操作:

1. 为您的下拉项创建自定义布局xml文件,假设我将其称为spinner_item.xml

2. 为您的下拉适配器创建自定义视图类.在此自定义类中,您需要在getView()和getDropdownView()方法中覆盖并设置自定义下拉项布局.我的代码如下:

   public class CustomArrayAdapter extends ArrayAdapter<String>{
   
   private List<String> objects;
   private Context context;
   
   public CustomArrayAdapter(Context context, int resourceId,
        List<String> objects) {
        super(context, resourceId, objects);
        this.objects = objects;
        this.context = context;
   }
   
   @Override
   public View getDropDownView(int position, View convertView,
       ViewGroup parent) {
       return getCustomView(position, convertView, parent);
   }
   
   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
     return getCustomView(position, convertView, parent);
   }
   
   public View getCustomView(int position, View convertView, ViewGroup parent) {
   
   LayoutInflater inflater=(LayoutInflater) context.getSystemService(  Context.LAYOUT_INFLATER_SERVICE );
   View row=inflater.inflate(R.layout.spinner_item, parent, false);
   TextView label=(TextView)row.findViewById(R.id.spItem);
    label.setText(objects.get(position));
   
   if (position == 0) {//Special style for dropdown header
         label.setTextColor(context.getResources().getColor(R.color.text_hint_color));
   }
   
   return row;
   }
   
   }
   

3. 在您的活动或片段中,为您的微调器视图使用自定义适配器.像这样的东西:

   Spinner sp = (Spinner)findViewById(R.id.spMySpinner);
   ArrayAdapter<String> myAdapter = new CustomArrayAdapter(this, R.layout.spinner_item, options);
   sp.setAdapter(myAdapter);
   

其中options是下拉项字符串列表.

Answer 4

尝试这个

当我尝试其他解决方案时，我遇到了很多问题......经过大量的研发，现在我得到了解决方案

1. 在布局文件夹中创建 custom_spinner.xml 并粘贴此代码

    <?xml version="1.0" encoding="utf-8"?>
   <RelativeLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:background="@color/colorGray">
   <TextView
   android:id="@+id/tv_spinnervalue"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:textColor="@color/colorWhite"
   android:gravity="center"
   android:layout_alignParentLeft="true"
   android:textSize="@dimen/_18dp"
   android:layout_marginTop="@dimen/_3dp"/>
   <ImageView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignParentRight="true"
   android:background="@drawable/men_icon"/>
   </RelativeLayout>
   

2. 在你的活动中

   Spinner spinner =(Spinner)view.findViewById(R.id.sp_colorpalates);
   String[] years = {"1996","1997","1998","1998"};
   spinner.setAdapter(new SpinnerAdapter(this, R.layout.custom_spinner, years));
   

3. 创建一个新的适配器类

   public class SpinnerAdapter extends ArrayAdapter<String> {
   private String[] objects;
   
   public SpinnerAdapter(Context context, int textViewResourceId, String[] objects) {
       super(context, textViewResourceId, objects);
       this.objects=objects;
   }
   
   @Override
   public View getDropDownView(int position, View convertView, @NonNull ViewGroup parent) {
       return getCustomView(position, convertView, parent);
   }
   
   @NonNull
   @Override
   public View getView(int position, View convertView, @NonNull ViewGroup parent) {
       return getCustomView(position, convertView, parent);
   }
   
   private View getCustomView(final int position, View convertView, ViewGroup parent) {
       View row = LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_spinner, parent, false);
       final TextView label=(TextView)row.findViewById(R.id.tv_spinnervalue);
       label.setText(objects[position]);
       return row;
   }
   }