Android中Spinner下拉列表（使用自定义Adapter实现，显示数据取自联系人数据库）

1.新建自定义的弹出窗口布局文件（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/textViewName"
android:layout_width="109dp"
android:layout_height="wrap_content"
android:text="TextView" />

<TextView
android:id="@+id/textViewNumber"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView" />

</LinearLayout>

2.建立自己的适配器类 MyAdapter.java

package com.contactClient;

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;

import com.data.Person;

public class MyAdapter extends BaseAdapter {

private Context mContext;
private List<Person> mList;

public MyAdapter(Context context, List<Person> list) {
this.mContext = context;
this.mList = list;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return mList.size();
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mList.get(position);
}

@Override
public long getItemId(int index) {
// TODO Auto-generated method stub
return index;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
LayoutInflater _LayoutInflater = LayoutInflater.from(mContext);
convertView = _LayoutInflater.inflate(R.layout.item, null);
if (convertView != null) {
TextView _TextView1 = (TextView) convertView
.findViewById(R.id.textViewName);
TextView _TextView2 = (TextView) convertView
.findViewById(R.id.textViewNumber);
_TextView1.setText(mList.get(position).getPersonName());
_TextView2.setText(mList.get(position).getPersonNumber());
}
return convertView;
}

}

3.在DemoContactClientActivity.java中创建自定义的MyAdapter并将spinner和MyAdapter绑定

package com.contactClient;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.PhoneLookup;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Spinner;

import com.data.Person;

public class DemoContactClientActivity extends Activity {

public List<Person> contactList;
public Spinner mSpinner;
public boolean isContactReady = false;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

contactList = new ArrayList<Person>();

//Open the thread to get contact information
ContactThread getContactTh = new ContactThread();
getContactTh.start();

//Set the adapter to spinner
mSpinner = (Spinner)findViewById(R.id.spinner1);
while (true) {
if (!isContactReady)
continue;
MyAdapter mAdapter = new MyAdapter(this, contactList);
mSpinner.setAdapter(mAdapter);
break;

}

mSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {

@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub

}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub

}
});

}

class ContactThread extends Thread{

@Override
public void destroy() {
// TODO Auto-generated method stub
super.destroy();
isContactReady=false;
}

@Override
public void run() {
// TODO Auto-generated method stub
super.run();

ContentResolver cr = getContentResolver();
Cursor cursor = cr.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null, null, null, "sort_key asc");

while (cursor.moveToNext()) {

// 取得联系人名字
int nameFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME);
String name = cursor.getString(nameFieldColumnIndex);

// 取得联系人的号码
int numberIndex = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
String number = cursor.getString(numberIndex);

Person p = new Person(name,number);
contactList.add(p);
}

isContactReady= true;

cursor.close();
}

}
}

4.最后不要忘记加上权限（很重要）

<uses-permission android:name="android.permission.READ_CONTACTS"/>