如何在android中获取以下数据库的记录数？

Question

I created the database like this...

SQLiteDatabase db;
db = openOrCreateDatabase("StudentDB", Context.MODE_PRIVATE, null);
        db.execSQL("CREATE TABLE IF NOT EXISTS student(idno VARCHAR,name VARCHAR,class VARCHAR,year VARCHAR,gender VARCHAR);");

I am using api23. please suggest the code .

Answer 1

public int getDBcountField () {
        // select query
        SQLiteDatabase db = this.getWritableDatabase();

        String sql = "SELECT * FROM student";
        int recordCount = db.rawQuery(sql, null).getCount();
        db.close();
        return recordCount;
}

It returns you to count number of total records in the table.

EDIT

You already use SQLiteDatabase db; in your code. So use these line for getting total count of records. Only use these 2 lines.

String sql = "SELECT * FROM student";
int recordCount = db.rawQuery(sql, null).getCount();