Android中自定义xml文件给Spinner下拉框赋值并获取下拉选中的值

忘是亡心i 2023-10-08 11:44 58阅读 0赞

## 场景 ##

实现效果如下

![20200107214256169.gif][]

注：

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[https://blog.csdn.net/badao\_liumang\_qizhi][https_blog.csdn.net_badao_liumang_qizhi]  
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## 实现 ##

将布局改为LinearLayout，并通过android:orientation="vertical">设置为垂直布局，然后添加id属性。

然后在res下values下新建arrays.xml，数组资源文件，用来存储下拉框的选项内容

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

arrays.xml:

<?xml version="1.0" encoding="utf-8"?>
    <resources>
        <string-array name="ctype">
            <item>全部</item>
            <item>公众号</item>
            <item>霸道</item>
            <item>的</item>
            <item>程序猿</item>
            <item>博客</item>
            <item>霸道</item>
            <item>流氓</item>
            <item>气质</item>
        </string-array>
    </resources>

只要通过name属性赋值为ctype，后续被引用。

然后再回到activity\_spinner.xml中，通过

android:entries="@array/ctype"

为下拉框设置选项数组内容。

activity\_spinner.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        tools:context=".SpinnerActivity">
    
        <Spinner
            android:id="@+id/spinnner"
            android:entries="@array/ctype"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
    
    </LinearLayout>

然后来到activity,通过id获取spinner，然后设置其选项被选中的事件监听器，获取选中值的内容并输出

package com.badao.relativelayouttest;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    import android.os.Bundle;
    import android.view.View;
    import android.widget.AdapterView;
    import android.widget.Spinner;
    import android.widget.Toast;
    
    public class SpinnerActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_spinner);
            Spinner spinner = (Spinner) findViewById(R.id.spinnner);
            spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                @Override
                public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                    String result = parent.getItemAtPosition(position).toString();
                    Toast.makeText(SpinnerActivity.this,result,Toast.LENGTH_SHORT).show();
                }
    
                @Override
                public void onNothingSelected(AdapterView<?> parent) {
    
                }
            });
        }
    }

[20200107214256169.gif]: https://img-blog.csdnimg.cn/20200107214256169.gif
[https_blog.csdn.net_badao_liumang_qizhi]: https://blog.csdn.net/badao_liumang_qizhi
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200107214302857.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70