android 代码设置apn

代码设置apn，上代码：

public class APNActivity extends Activity {

        public static final Uri APN_URI = Uri.parse("content://telephony/carriers");
        public static final Uri CURRENT_APN_URI = Uri.parse("content://telephony/carriers/preferapn");

        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);
                int _3gWapId = addAPN();
                SetAPN(_3gWapId);
        }
        
        //新增一个3GWap接入点
        public int addAPN() {
                int id = -1;
                ContentResolver resolver = this.getContentResolver();
                ContentValues values = new ContentValues();
                values.put("name", "3gwap");
                values.put("apn", "3gwap");
                values.put("mcc", "460");
                values.put("mnc", "01");
                values.put("numeric", "46001");

                Cursor c = null;
                Uri newRow = resolver.insert(APN_URI, values);
                if (newRow != null) {
                        c = resolver.query(newRow, null, null, null, null);
                        int idIndex = c.getColumnIndex("_id");
                        c.moveToFirst();
                        id = c.getShort(idIndex);
                }
                if (c != null)
                        c.close();
                return id;
        }
        //设置接入点
        public void SetAPN(int id) {
                ContentResolver resolver = this.getContentResolver();
                ContentValues values = new ContentValues();
                values.put("apn_id", id);
                resolver.update(CURRENT_APN_URI, values, null, null);
        }
}