android 通过ContentResolver获得联系人数据

package MyGetContacts.code;

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.widget.TextView;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */

   TextView textView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        textView = (TextView)findViewById(R.id.textView);
        String str = getQueryData();
        textView.setText(str);

    }

    private String getQueryData()
    {
       String result = "";
       ContentResolver resolver = getContentResolver();
       Cursor cursor = resolver.query(ContactsContract.Contacts.CONTENT_URI,null,null,null,null);

       int idIndex = cursor.getColumnIndex(ContactsContract.Contacts._ID);
       int nameIndex = cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);

       //for(cursor.moveToFirst();(!cursor.isAfterLast());cursor.moveToNext())
       while(cursor.moveToNext())
       {
           String contactId = cursor.getString(idIndex);

           Cursor phone = resolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                   null,ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + contactId,
                   null,null);

           result = result + contactId + "\t";

           while(phone.moveToNext())
           {
               int i = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
               String num = phone.getString(i);
               result += num;
           }

           result = result + cursor.getString(nameIndex) + "\t\n";

           phone.close();
       }
        cursor.close();

return result;
}
}

最后别忘了加上 <uses-permission android:name="android.permission.READ_CONTACTS"/> 这个权限，否则运行会出错

（真不知道google加这些权限干嘛用，脑残~~~）