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2012年(403)

分类: 嵌入式

2012-04-11 19:11:59

最近开始学习Android,主要看的是《Android应用开发揭秘》,在第3章的Example_03_02是一个读取通讯录联系人姓名和电话 的实例,但由于API 2.0中,每个联系人可以有多个电话(例如手机、住宅、公司、传真等),书中原有的实例在API 2.0的环境中会报错。

书中的Example_03_02代码:

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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.widget.TextView;
 
public class Activity01 extends Activity
{
    public void onCreate(Bundle savedInstanceState)
    {
        TextView tv = new TextView(this);
        String string = "";       
        super.onCreate(savedInstanceState);   
        //得到ContentResolver对象
        ContentResolver cr = getContentResolver(); 
        //取得电话本中开始一项的光标
        Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
        //向下移动一下光标
        while(cursor.moveToNext())
        {
            //取得联系人名字
            int nameFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME);    
            String contact = cursor.getString(nameFieldColumnIndex);
            //取得电话号码
            int numberFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.NUMBER);  //此行会报错,返回值=-1 
            String number = cursor.getString(numberFieldColumnIndex);
             
            string += (contact+":"+number+"\n");
        }
        cursor.close();
        //设置TextView显示的内容
        tv.setText(string);
        //显示到屏幕
        setContentView(tv);
    }
}

参考网上的资料,找到了正确读取联系人电话的方法:

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import android.app.Activity;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.PhoneLookup;
import android.database.Cursor;
import android.widget.TextView;
import android.content.ContentResolver;
 
public class Activity01 extends Activity
{
    public void onCreate(Bundle savedInstanceState)
    {
        TextView tv = new TextView(this);
        String string = "";
        super.onCreate(savedInstanceState);
         
        //得到ContentResolver对象
        ContentResolver cr = getContentResolver();
        //取得电话本中开始一项的光标
        Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
        //向下移动光标
        while(cursor.moveToNext())
        {
            //取得联系人名字
            int nameFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME);
            String contact = cursor.getString(nameFieldColumnIndex);
            //取得电话号码
            String ContactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
            Cursor phone = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,
            ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + ContactId, null, null);
             
            while(phone.moveToNext())
            {
                String PhoneNumber = phone.getString(phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                string += (contact + ":" + PhoneNumber + "\n");
            }
        }
        cursor.close();
         
        //设置TextView显示的内容
        tv.setText(string);
        //显示到屏幕
        setContentView(tv);
    }
}

最后记得在AndroidManifest.xml声明读取联系人的API:

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