android之sqlite增、删、改，查

******************分页查询***************************

这里使用了query函数进行限制每页查询出来的数量

函数定义如下：

    public Cursor query(String table, String[] columns, String selection,
            String[] selectionArgs, String groupBy, String having,
            String orderBy, String limit) {

        return query(false, table, columns, selection, selectionArgs, groupBy,
                having, orderBy, limit);
    }

?使用方法如下：

        List<PassergerInfo> passengerList = new ArrayList<>();
        SQLiteDatabase db = mDbHelper.getReadableDatabase();
        Cursor cursor = db.query(Table_boardingpassengers,null,null,null,null,null,
                null,(currentPage-1)*pageSize+","+currentPage*pageSize);
        if(null == cursor || 0 == cursor.getCount()){
            Tool_Log.e("SelectBoardingPassenger_Api no data");
            return  passengerList;
        }
        while (cursor.moveToNext()){
            int id = cursor.getInt(cursor.getColumnIndex("id"));
            String flightNum = cursor.getString(cursor.getColumnIndex("flightNum"));
        }

******************插入数据***************************

不需要写sql语句，直接用一个容器放置数据

        SQLiteDatabase db = mDbHelper.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put("id",pInfo.id);
        values.put("flightNum",pInfo.flightNum);
        db.insert(Table_boardingpassengers,null,values);

?

******************删除数据***************************

清空全部数据：

        SQLiteDatabase db = mDbHelper.getWritableDatabase();
        db.delete(Table_boardingpassengers,null,null);

?

******************更新数据***************************

根据条件更新数据库

?

        SQLiteDatabase db = mDbHelper.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put("isImportant",isImportant);
        String[] args = {isImportant+""};
        db.update(Table_boardingpassengers,values,"id=?",args);

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