getSerializableExtra 已弃用，有什么替代方案？

Question

I have upgraded targetSdkVersion and compileSdkVersion to 33 .

Now getting warning getSerializableExtra and getParcelableExtra are deprecated.

I checked and confirmed from here that it is deprecated.

It is suggested to use updated getSerializableExtra and getParcelableExtra . Anyone can help me to use the updated method.

1. Warning while getting an Object :

2. Warning while getting an List or ArrayList :

Answer 1

Haven't used it myself till yet . As the doc says the updated method is

T getSerializableExtra(String, Class<T>) So you can use it as follows i think.

val myPOJOClass = intent.getSerializableExtra("my_intent_key", MyPOJOClass::class.java)

Answer 2

method T getSerializableExtra(String, Class<T>) is introduced from android 33. so you shoud use an if block for devices using android below 33.

fun <T : Serializable?> getSerializable(activity: Activity, name: String, clazz: Class<T>): T
{
    return if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU)
               activity.intent.getSerializableExtra(name, clazz)!!
           else
               activity.intent.getSerializableExtra(name) as T
}

and then you can use it in your activity like this:

val myPOJOClass = getSerializable(this, "my_intent_key", MyPOJOClass::class.java)

Answer 3

Inspired by Mohamad's answer, you can do an extension

fun <T : Serializable?> Bundle.getSerializableCompat(key: String, clazz: Class<T>): T {
    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) getSerializable(key, clazz)!! else (getSerializable(key) as T)
}

and call it everywhere like this:

   arguments?.getSerializableCompat("my_key", MyClass::class.java)

Answer 4

However, Mohamad Seyedi's answer did the job. But it fails in the case of getting intent data from onActivityResult() .

We can't get data using Activity's intent inside onActivityResult() . Below are the solutions I got.

Solution 1: Using extension function:

fun <T : Serializable?> Intent.getSerializable(key: String, m_class: Class<T>): T {
    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU)
        this.getSerializableExtra(key, m_class)!!
    else
        this.getSerializableExtra(key) as T
}

Usage:

val myPOJOClass = intent.getSerializable("my_intent_key", MyPOJOClass::class.java)

---

Solution 2: Using regular function:

fun <T : Serializable?> getSerializable(intent: Intent, key: String, m_class: Class<T>): T {
    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU)
        intent.getSerializableExtra(key, m_class)!!
    else
        intent.getSerializableExtra(key) as T
}

Usage:

val myPOJOClass = getSerializable(intent, "my_intent_key", MyPOJOClass::class.java)

Answer 5

 val myPojoClass = getSerializable(intent, "key_name_here", MyPojoTypeClass::class.java)

then, create that function

 private fun <T: Serializable?> getSerializable(intent: Intent, key: String, className: Class<T>): T { return if (Build.VERSION.SDK_INT >= 33) intent.getSerializableExtra(key, className).! else intent.getSerializableExtra(key) as T }

Answer 6

This is what I use:

inline fun <reified T> Bundle.serializable(key: String): T? = when {
  SDK_INT >= 33 -> getSerializable(key, T::class.java)
  else -> @Suppress("DEPRECATION") getSerializable(key) as? T
}

inline fun <reified T> Intent.serializable(key: String): T? = when {
  SDK_INT >= 33 -> getSerializable(key, T::class.java)
  else -> @Suppress("DEPRECATION") getSerializableExtra(key) as? T
}

I've also written the same for getParcelable here and requested this to be added to the Support libraries directly

Answer 7

For those of us who still use Java, this function does the trick:

@SuppressWarnings({"unchecked", "deprecation"})
@Nullable
public static <T extends Serializable> T getSerializable(@Nullable Bundle bundle, @Nullable String key, @NonNull Class<T> clazz) {
    if (bundle != null) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
            return bundle.getSerializable(key, clazz);
        } else {
            try {
                return (T) bundle.getSerializable(key);
            } catch (Throwable ignored) {
            }
        }
    }
    return null;
}

Answer 8

You can use top functions to serialize arguments

but I had a problem serializing the List of object

You can use this way to put and get serialized argument data

Because List is not a Serializable Class, you need to convert it to Array List that supports serializable

These functions are used for serializable

 inline fun <reified T : Serializable> Bundle.serializable(key: String): T? = 
     when {
        Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU -> 
            getSerializable(key, T::class.java)
        else -> @Suppress("DEPRECATION") getSerializable(key) as? T
     }

inline fun <reified T : Serializable> Intent.serializable(key: String): T? = 
    when {
       Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU -> 
           getSerializableExtra(key, T::class.java)
       else -> @Suppress("DEPRECATION") getSerializableExtra(key) as? T
    }

and this way handle puts serialized List of objects

  class YourFragment: Fragment {

      private latinit var list: List<YourObject>


      fun newInstance(
           listOfYourObject: List<YourObject>
       ): YourFragment {

           val args = Bundle()
           val yourList= ArrayList<YourObject>()
           yourList.addAll(listOfYourObject)
           args.putSerializable(LIST_KEY, yourList)
        
           val fragment = YourFragment()
           fragment.arguments = args
           return fragment
       }

   }

and now can get serialize of your list object in this way

   override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    requireArguments().serializable<ArrayList<YourObject>>(LIST_KEY)?.let{
        list = it.toList()
    }
   
 }