android - 如何从整个联系人中检索唯一的电子邮件 ID？

Question

我的main.xml文件中有一个按钮。当我单击该按钮时，它将显示整个联系人列表的电子邮件 ID 列表。这意味着检索联系人的电子邮件 ID（如果有）。我需要电子邮件 ID 而不是联系人。有什么解决办法吗？

Answer 1

请检查代码。

 Public ArrayList<String> getNameEmailDetails(){
    ArrayList<String> names = new ArrayList<String>();
    ContentResolver cr = getContentResolver();
    Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,null, null, null, null);
    if (cur.getCount() > 0) {
        while (cur.moveToNext()) {
            String id = cur.getString(cur.getColumnIndex(ContactsContract.Contacts._ID));
            Cursor cur1 = cr.query( 
                    ContactsContract.CommonDataKinds.Email.CONTENT_URI, null,
                    ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = ?", 
                            new String[]{id}, null); 
            while (cur1.moveToNext()) { 
                //to get the contact names
                String name=cur1.getString(cur1.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                Log.e("Name :", name);
                String email = cur1.getString(cur1.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
                Log.e("Email", email);
                if(email!=null){
                    names.add(name);
                }
            } 
            cur1.close();
        }
    }
    return names;
}

Answer 2

试试下面的，

package stack.examples;

import java.util.ArrayList;
import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.CommonDataKinds.Email;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

public class StackOverFlowGetContactsActivity extends Activity {

    ListView lvItem;
    private Button btnAdd;
    String displayName="", emailAddress="", phoneNumber="";
    ArrayList<String> contactlist=new ArrayList<String>();
    ArrayAdapter<String> itemAdapter;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       lvItem = (ListView)this.findViewById(R.id.listView_items);  
       btnAdd = (Button)this.findViewById(R.id.btnAddItem);
       itemAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,contactlist);
       lvItem.setAdapter(itemAdapter);
       btnAdd.setOnClickListener(new View.OnClickListener() {
           public void onClick(View v) {
               GetEmails();
           }
       });
    }

    private void GetEmails()
    {
        ContentResolver cr =getContentResolver();
        Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
        while (cursor.moveToNext()) 
        {       
            String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
            Cursor emails = cr.query(Email.CONTENT_URI,null,Email.CONTACT_ID + " = " + id, null, null);
            while (emails.moveToNext()) 
            {               
                emailAddress = emails.getString(emails.getColumnIndex(Email.DATA));
                contactlist.add(emailAddress);
                itemAdapter.notifyDataSetChanged();
            }
            emails.close();

        }
        cursor.close(); 
    }
}