ContentResolver().query的分组查询

  query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder);

方法中没有group by的参数，这个方法毕竟是别人封装的sql语句，于是我把group by放在了selection里。结果报错了。

  在网上找了一下，原来是 拼接的不对。and后面加一个查询语句。方式如下

String[] projection = newString[] {

  "_id","thread_id","address",

  "person","body","date"};

Cursor cursor = context.getContentResolver().query(SMS_PROVIDER,

  projection,"0=0) group by (thread_id",null,"date desc");