Android Question Map and list saved to file?

[Scantech]

I have a numerous of Maps and List need to be saved to 1 file. I know how to save them individually, but it just creates numerous of files. I searched and did not come up with a solution.

 

[Sagenut]

Put them into a list and save that list serializing it.

 

[Scantech]

Private Sub Button1_Click
    Dim lContainer As List
    lContainer.Initialize
    
    'Map and List data need to be saved
    Dim m As Map
    m.Initialize
    m.Put("MapKey", "Value 1")
    
    Dim l As List
    l.Initialize
    For g = 0 To 200
        l.Add(g)
    Next
    
    lContainer.Add(m)        'index 0 contains maps
    lContainer.Add(l)        'index 1 contains arrays of list
        
    Dim DataBuffer() As Byte
    Dim Ser As B4XSerializator
    DataBuffer = Ser.ConvertObjectToBytes(lContainer)
    File.WriteBytes(File.DirInternal, "Test.dat", DataBuffer)
    
    Dim DataBuffer2() As Byte
    Dim Ser2 As B4XSerializator
    DataBuffer2 = File.ReadBytes(File.DirInternal, "Test.dat")
    
    Dim GetObjectList As List
    GetObjectList = Ser2.ConvertBytesToObject(DataBuffer2)
    
    'Get Map from index 0
    Dim m2 As Map
    m2.Initialize
    m2 = GetObjectList.Get(0)
    Log(m2)
    Log(m2.Get("MapKey"))
    Log(m2.Size)
    
    'Get List from index 1
    Dim l2 As List
    l2.Initialize
    l2 = GetObjectList.Get(1)
    Log(l2)
    Log(l2.Size)

End Sub

(MyMap) {MapKey=Value 1}
Value 1
1
(ArrayList) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200]
201

Thanks. i learned something new today.

 

[Erel]

Another option is to use KeyValueStore. It is based on B4XSerializator + SQLite. Very easy to use and very powerful.

 

[aeric]

Another idea is to save it as a JSON file and use the JSON library.