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Using matrices in firebase

Some time after installing the int matrix, int[][] Matrix = new int[4][4]I cannot load it into firebase mDatabase.child("room_1").setValue(Matrix);, because arrays are not supported. The reason I use int[][]is the ability to add integers using Matrix[2][3] += 1 What data types are compatible with firebase and can handle these types of additions? Thank you

I could not get it to work the way I wanted, with lists or Long, so I used int matrix[][]and updated db with setValue(matrix[index][index2])one on one.

In order to get the database in the matrix, I used two nested loops that check each value and put it in the matrix. The next function gets the object

public void SyncWDB(Object dbValue) {
        ArrayList aList = (ArrayList) dbValue;
        //I hardcoded the matrix dimensions just for testing 
        int e = 0;
        int i = 0;
        while (e < 5) {
            ArrayList temp = (ArrayList) aList.get(e);
            while (i < 4) {
                Long temp2 = Long.parseLong(String.valueOf(temp.get(i)));
                int temp3 = temp2.intValue();
                // Matrix is a class variable
                Matrix[e][i] = temp3;

                i++;
            }
            i = 0;
            e++;
        }

    }
+4
1

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List<List<Integer>> listOfLists = new ArrayList<List<Integer>>();
+1

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