OnActivityResult method is deprecated, what is the alternative?

问题

Recently I faced the onActivtyResult is deprecated. what should we do for handle it?

any alternative introduced for that?

回答1:

A basic training is available at developer.android.com.

Here is an example on how to convert the existing code with the new one:

The old way:

    public void openSomeActivityForResult() {
        Intent intent = new Intent(this, SomeActivity.class);
        startActivityForResult(intent, 123);
    }

    @Override
    protected void onActivityResult (int requestCode, int resultCode, Intent data) {
        if (resultCode == Activity.RESULT_OK && requestCode == 123) {
            doSomeOperations();
        }
    }

The new way (Java):

    // You can do the assignment inside onAttach or onCreate, i.e, before the activity is displayed
    ActivityResultLauncher<Intent> someActivityResultLauncher = registerForActivityResult(
            new ActivityResultContracts.StartActivityForResult(),
            new ActivityResultCallback<ActivityResult>() {
                @Override
                public void onActivityResult(ActivityResult result) {
                    if (result.getResultCode() == Activity.RESULT_OK) {
                        // There are no request codes
                        Intent data = result.getData();
                        doSomeOperations();
                    }
                }
            });

    public void openSomeActivityForResult() {
        Intent intent = new Intent(this, SomeActivity.class);
        someActivityResultLauncher.launch(intent);
    }

The new way (Kotlin):

var resultLauncher = registerForActivityResult(StartActivityForResult()) { result ->
    if (result.resultCode === Activity.RESULT_OK) {
        // There are no request codes
        val data: Intent? = result.data
        doSomeOperations()
    }
}

fun openSomeActivityForResult() {
    val intent = Intent(this, SomeActivity::class.java)
    resultLauncher.launch(intent)
}

回答2:

From now, startActivityForResult() has been deprecated so use new method instead of that.

Kotlin Example

fun openActivityForResult() {
         startForResult.launch(Intent(this, AnotherActivity::class.java))
}


val startForResult = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { 
result: ActivityResult ->
    if (result.resultCode == Activity.RESULT_OK) {
        val intent = result.data
        // Handle the Intent
        //do stuff here
    }
}

回答3:

onActivityResult, startActivityForResult, requestPermissions, and onRequestPermissionsResult are deprecated on androidx.fragment from 1.3.0-alpha04, not on android.app.Activity.
Instead, you can use Activity Result APIs with registerForActivityResult.

回答4:

In KOTLIN I changed my code

startActivityForResult(intent, Constants.MY_CODE_REQUEST)

and

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    super.onActivityResult(requestCode, resultCode, data)
    if (resultCode == Activity.RESULT_OK) {
        when (requestCode) {
            Constants.MY_CODE_REQUEST -> {
            ...
}

FOR

registerForActivityResult(StartActivityForResult()) { result ->
    onActivityResult(Constants.MY_CODE_REQUEST, result)
}.launch(intent)

and

private fun onActivityResult(requestCode: Int, result: ActivityResult) {
    if(result.resultCode == Activity.RESULT_OK) {
        val intent = result.data
        when (requestCode) {
            Constants.MY_CODE_REQUEST -> {
            ...

I hope it works for you. :D

回答5:

It seems that onActivityResult is deprecated in the super class but you did not mention the super class name and compileSdkVersion here in your question.

In Java and Kotlin every class or method could be marked as deprecated simply by adding @Deprecated to it so check your super class you may extend a wrong class.

When a class is deprecated all of its methods are deprecated too.

To see a quick solution click on deprecated method and press Ctrl+Q in Android studio to see documentation of method there should be a solution for it.

In my project using androidx and API 29 as compileSdkVersion, this method is NOT deprecated in activities and fragments

来源：https://stackoverflow.com/questions/62671106/onactivityresult-method-is-deprecated-what-is-the-alternative

标签

android

android-fragments

android-activity

onactivityresult