相关疑难解决方法(0)

我已经编写了以下代码来添加Android手机本中的新联系人,它正在工作但是当我打开联系人菜单时,我看不到添加的新联系人.任何人都可以帮我找出这里有什么问题吗？

import android.app.Activity;
import android.os.Bundle;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.provider.ContactsContract;

import android.widget.TextView;
import android.widget.Toast;

public class AddContacts extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        try {
            ContentResolver cr = this.getContentResolver();
            ContentValues cv = new ContentValues();
            cv.put(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME, "New Name");
            cv.put(ContactsContract.CommonDataKinds.Phone.NUMBER, "1234567890");
            cv.put(ContactsContract.CommonDataKinds.Phone.TYPE, ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE);
            cr.insert(ContactsContract.RawContacts.CONTENT_URI, cv);

            Toast.makeText(this, "Contact added", Toast.LENGTH_LONG).show();
        } catch(Exception e) {
            TextView tv = new TextView(this);
            tv.setText(e.toString());
            setContentView(tv);
        }
    }
}