Question

我必须在数据库中找到“id”，我尝试这种方式，但我无法解决它。你可以帮帮我吗。非常感谢。

listview.setOnItemClickListener(new AdapterView.XouOnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                                long arg3) {

            String text = (String) listview.getItemAtPosition(arg2);


            Database db = new Database(getApplicationContext());
            String query = "SELECT name, id FROM tableDB WHERE name = '" + text + "'"; // I think problem is here
            Cursor cursor = db.rawQuery(query, null);
            cursor.moveToFirst();

             id_position = cursor.getInt(cursor.getColumnIndex("id"));

            go_detail();
        }
    });

//这部分没问题

private void go_detail(){
            Intent intent = new Intent(getApplicationContext(), Detail_page.class);
            intent.putExtra("id", (int) name_ids[id_position]);
            startActivity(intent);
}

Answer 1

我认为错误在您的go_detail函数中。尝试添加一个参数，例如go_detail(int id_position){....}，它不能获取没有参数的id

通过任何项目从sqlite中查找id

1 个答案: