我自定义了一个下拉列表样式如下
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="25dp"
android:layout_toRightOf="@+id/image"
android:text="None" />
</RelativeLayout>
main.xml是这个
<?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="vertical" >
<TextView
android:id="@+id/textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ff0000"
android:textSize="25sp"
/>
<Spinner
android:id="@+id/spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
最后是
package com.example.spinner;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TextView;
public class MainActivity extends Activity implements OnItemSelectedListener{
private TextView tv;
private Spinner sp;
private List<Map<String, Object>>list;
private SimpleAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv=(TextView) findViewById(R.id.textview);
sp=(Spinner) findViewById(R.id.spinner);
list= new ArrayList<Map<String,Object>>();
getdata();
adapter=new SimpleAdapter(this, list, R.layout.item, new String[]{"inmage","text"},
new int[]{R.id.image,R.id.text});
adapter.setDropDownViewResource(R.layout.item);
sp.setAdapter(adapter);
sp.setOnItemSelectedListener(this);
}
private List<? extends Map<String, ?>> getdata() {
// TODO Auto-generated method stub
Map<String, Object>map=new HashMap<String, Object>();
map.put("image", R.drawable.ic_launcher);
map.put("text", "北京");
Map<String, Object>map2=new HashMap<String, Object>();
map2.put("image", R.drawable.ic_launcher);
map2.put("text", "上海");
Map<String, Object>map3=new HashMap<String, Object>();
map3.put("image", R.drawable.ic_launcher);
map3.put("text", "杭州");
Map<String, Object>map4=new HashMap<String, Object>();
map4.put("image", R.drawable.ic_launcher);
map4.put("text", "深圳");
list.add(map);
list.add(map2);
list.add(map3);
list.add(map4);
return list;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
tv.setText("你所选的城市是"+adapter.getItem(position));
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
tv.setText("None");
}
}