今天学习了Spinner组件,使用Spinner相当于从下拉列表中选择项目,下面演示一下Spinner的使用(分别使用ArrayAdapter和自定义Adapter实现)
(一):使用ArrayAdapter进行适配数据:
①:首先定义一个布局文件:
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< span style = "font-size:16px;" ><? xml version = "1.0" encoding = "utf-8" ?>
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< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
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android:layout_width = "fill_parent"
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android:layout_height = "fill_parent"
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android:orientation = "vertical" >
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android:id = "@+id/spinner1"
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android:layout_width = "match_parent"
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android:layout_height = "wrap_content"
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</ LinearLayout ></ span >
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【注意:】上面的Spinner有两个属性1:prompt是初始的时候,Spinner显示的数据,是一个引用类型
2:entries是直接在xml布局文件中绑定数据源(可以不设置,即可以在Activity中动态绑定)
②:建立数据源,使用数组,这些数据将会在Spinner下来列表中进行显示:
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< span style = "font-size:16px;" ><? xml version = "1.0" encoding = "utf-8" ?>
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< string-array name = "spinnername" >
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③:接着在Activity中加入如下的代码(使用了系统定义的下拉列表的布局文件,当然也可以自定义)
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mSpinner = (Spinner) findViewById(R.id.spinner1); |
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String[] mItems = getResources().getStringArray(R.array.spinnername); |
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ArrayAdapter<String> _Adapter= new ArrayAdapter<String>( this ,android.R.layout.simple_spinner_item, mItems);
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mSpinner.setAdapter(_Adapter); |
以上代码初步完成,看下运行效果:
下面是关于Spinner的点击事件(效果图如上图):
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mSpinner.setOnItemSelectedListener( new OnItemSelectedListener() {
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public void onItemSelected(AdapterView<?> parent, View view,
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int position, long id) {
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String str=parent.getItemAtPosition(position).toString();
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Toast.makeText(SpinnerActivity. this , "你点击的是:" +str, 2000 ).show();
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public void onNothingSelected(AdapterView<?> parent) {
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(二)使用自定义的Adapter(重点)
①:定义每一个Item的布局文件
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<? xml version = "1.0" encoding = "utf-8" ?>
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< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
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android:layout_width = "match_parent"
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android:layout_height = "match_parent"
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android:orientation = "horizontal" >
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android:id = "@+id/textView1"
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android:layout_width = "wrap_content"
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android:layout_height = "wrap_content"
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android:drawableLeft = "@drawable/ic_launcher"
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android:paddingRight = "8dip"
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android:paddingTop = "8dip"
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android:text = "TextView"
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android:textSize = "25sp" />
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android:id = "@+id/textView2"
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android:layout_width = "wrap_content"
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android:layout_height = "wrap_content"
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android:paddingLeft = "8dip"
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android:paddingTop = "8dip"
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android:text = "TextView"
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android:textSize = "25sp" />
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②:建立Person类:
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package com.jiangqq.csdn;
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private String personName;
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private String personAddress;
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public Person(String personName, String personAddress) {
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this .personName = personName;
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this .personAddress = personAddress;
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public String getPersonName() {
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public void setPersonName(String personName) {
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this .personName = personName;
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public String getPersonAddress() {
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public void setPersonAddress(String personAddress) {
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this .personAddress = personAddress;
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③:创建MyAdapter继承与BaseAdapter,进行适配:
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package com.jiangqq.csdn;
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import java.util.List;
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import android.content.Context;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.BaseAdapter;
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import android.widget.TextView;
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* @author jiangqq <a href=http://blog.csdn.net/jiangqq781931404></a>
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public class MyAdapter extends BaseAdapter {
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private List<Person> mList;
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private Context mContext;
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public MyAdapter(Context pContext, List<Person> pList) {
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this .mContext = pContext;
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public int getCount() {
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public Object getItem( int position) {
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return mList.get(position);
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public long getItemId( int position) {
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public View getView( int position, View convertView, ViewGroup parent) {
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LayoutInflater _LayoutInflater=LayoutInflater.from(mContext);
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convertView=_LayoutInflater.inflate(R.layout.item, null );
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TextView _TextView1=(TextView)convertView.findViewById(R.id.textView1);
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TextView _TextView2=(TextView)convertView.findViewById(R.id.textView2);
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_TextView1.setText(mList.get(position).getPersonName());
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_TextView2.setText(mList.get(position).getPersonAddress());
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④:在Activity中加入如下代码:
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mSpinner = (Spinner) findViewById(R.id.spinner1); |
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List<Person> persons= new ArrayList<Person>();
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persons.add( new Person( "张三" , "上海 " ));
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persons.add( new Person( "李四" , "上海 " ));
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persons.add( new Person( "王五" , "北京" ));
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persons.add( new Person( "赵六" , "广州 " ));
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MyAdapter _MyAdapter= new MyAdapter( this , persons);
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mSpinner.setAdapter(_MyAdapter); |
运行效果如下截图:
监听事件和第一种方法相同:
Android中Spinner下拉列表(使用ArrayAdapter和自定义Adapter实现) .,布布扣,bubuko.com
Android中Spinner下拉列表(使用ArrayAdapter和自定义Adapter实现) .