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Android Spinner使用简介
Android中使用Spinner作为下拉列表，下面直接看实现方式；
（1）使用ArrayAdapter来实现；
实现步骤：
1. 在布局文件中定义Spinner组件；
2. 向Spinner添加需要的数据，可以在XML文件中定义列表数据，也可以在Java代码中设置；
3. 设置监听器setOnItemSelectedListener，并实现onItemSelected方法；
先看在Java代码中添加下拉列表的数据；
MainActivity.java
package com.xiaozhang.spinner1;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class MainActivity extends Activity { private static final String[] province = { "山东省", "河南省", "福建省", "陕西省", "陕西省", "湖北省" }; private TextView textView; private Spinner spinner; private ArrayAdapter<String> arrayAdapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.text); spinner = (Spinner) findViewById(R.id.spinner); // 将Spinner里面的可选择内容通过ArrayAdapter连接起来 arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, province); // 设置Spinner的样式 arrayAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // 为Spinner设置适配器 spinner.setAdapter(arrayAdapter); // 添加Spinner事件监听 spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { textView.setText("选择城市：" + province[arg2]); // 设置显示当前选择的项 arg0.setVisibility(View.VISIBLE); } @Override public void onNothingSelected(AdapterView<?> arg0) { } }); }}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="10dp" > <TextView android:id="@+id/text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:gravity="center" /> <Spinner android:id="@+id/spinner" android:layout_width="match_parent" android:layout_height="wrap_content" /></LinearLayout>
再看一下在配置文件中添加数据：
MainActivity.java
package com.xiaozhang.spinner1;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class MainActivity extends Activity { private TextView textView; private Spinner spinner; private ArrayAdapter<CharSequence> adapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); spinner = (Spinner) findViewById(R.id.spinner); textView = (TextView) findViewById(R.id.text); adapter = ArrayAdapter.createFromResource(this, R.array.province, android.R.layout.simple_spinner_item); // 调用setDropDownViewResource方法，以XML的方式定义下拉菜单要显示的样式 adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // 为spinner设置适配器 spinner.setAdapter(adapter); spinner.setOnItemSelectedListener(new MyOnItemSelectedListener()); } public class MyOnItemSelectedListener implements OnItemSelectedListener { public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { textView.setText("城市：" + parent.getItemAtPosition(pos).toString()); } public void onNothingSelected(AdapterView<?> parent) { } }}
activity_main.xml文件不变，在strings.xml中添加：
<string-array name="province"> <item>山东省</item> <item>河南省</item> <item>福建省</item> <item>陕西省</item> <item>湖北省</item> </string-array>
（2）我们还可以使用自定义Adapter，通过继承BaseAdapter来实习下拉列表的功能；
实现代码如下：
Spinner1.java
package com.xiaozhang.spinner1;public class Spinner1 { private String name; private String address; public Spinner1(String name, String address) { super(); this.name = name; this.address = address; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } @Override public String toString() { return name + " " + address; }}
MainActivity.java
package com.xiaozhang.spinner1;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.Spinner;import android.widget.TextView;public class MainActivity extends Activity { private TextView textView; private Spinner spinner; List<Spinner1> list; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.text); spinner = (Spinner) findViewById(R.id.spinner1); list = new ArrayList<Spinner1>(); list.add(new Spinner1("张三", "上海 ")); list.add(new Spinner1("李四", "郑州 ")); list.add(new Spinner1("王五", "北京")); list.add(new Spinner1("赵六", "广州 ")); MyAdapter myAdapter = new MyAdapter(this, list); // 为spinner设置适配器 spinner.setAdapter(myAdapter); spinner.setOnItemSelectedListener(new MyOnItemSelectedListener()); } public class MyOnItemSelectedListener implements OnItemSelectedListener { public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { // 或者使用：textView.setText("选择的是：" + list.get(pos)); textView.setText("选择的是：" + parent.getItemAtPosition(pos).toString()); } public void onNothingSelected(AdapterView<?> parent) { } }}
MyAdapter.java
package com.xiaozhang.spinner1;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;public class MyAdapter extends BaseAdapter { private List<Spinner1> mList; private Context mContext; public MyAdapter(Context pContext, List<Spinner1> pList) { this.mContext = pContext; this.mList = pList; } @Override public int getCount() { return mList.size(); } @Override public Object getItem(int position) { return mList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater layoutInflater = LayoutInflater.from(mContext); convertView = layoutInflater.inflate(R.layout.item, null); if (convertView != null) { TextView textView1 = (TextView) convertView .findViewById(R.id.textView1); TextView textView2 = (TextView) convertView .findViewById(R.id.textView2); textView1.setText(mList.get(position).getName()); textView2.setText(mList.get(position).getAddress()); } return convertView; }}
item.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:drawableLeft="@drawable/pic1" android:paddingLeft="5dp" android:paddingRight="5dp" android:paddingTop="8dp" android:textSize="15sp" /> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingTop="8dp" android:textSize="15sp" /></LinearLayout>
第二种方式参考自：
http://blog.csdn.net/developer_jiangqq/article/details/7285623
Android Spinner使用简介
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