• iOS/Swift and Android/Java Conversion Chart

    I am beta-testing my first Android app, and have recently completed my second iOS app. Having taught myself how to program in both Swift and Java, I spent a lot of time lamenting the inability to easily convert code between the two. Sure, there are cross-platform solutions, but as an independent developer, I couldn’t afford to invest a ton of money in a paid system. Plus, I had already learned Swift, and this wasn’t helpful for many cross-platform solutions.

    Below is a list-in-progress of concepts and objects that have parallels between the two operating systems and languages. Feel free to comment and make suggestions!

    iOS Android
    storyboard/nib design/layout/xml
    constraints layouts
    UIViewController Activity/Fragment
    UIView View
    UITableView RecyclerView/LinearLayout
    UICollectionView RecyclerView/GridLayout
    UIPickerView Spinner
    UITextView/UITextField EditText
    UILabel TextView
    UIButton Button/ImageButton
    UIImageView ImageView
    UISwitch Switch
    viewDidLoad() onCreate()
    viewWillAppear() onResume()
    viewWillDisappear() onSuspend()
    NSNotification.postNotification() sendBroadcast()
    NSNotification.addObserver() BroadcastReceiver.onReceive()
    dispatch_async() AsyncTask()
     Swift Java
    Class Class
    String String
    Int int/Integer
    Bool boolean/Boolean
    Array ArrayList/[] — example: String[]
    Dictionary HashMap
    for i in i..<count { } for (int i=0; i<count; i++) { }
    for item in array { } for (String item : array) { }
    if x == 5 if (x == 5)
    switch object switch (object)
    case:
    x = 4;
    break;
    case:
    x = 4

    I hope this is helpful to some other beginning programmers! Reinventing the wheel for each device is hard enough…not even knowing what the wheel is called is even worse!

3 Responsesso far.

  1. alexporubay says:

    This is very helpful article. Can I use some quotes from here in my article here: https://www.cleveroad.com/blog/how-to-convert-android-to-ios-app-or-two-apps-are-better-than-one