startActivityForResult deprecated google sign in

1. Overview

In this article, we will discuss the alternative solution to startActivityForResult deprecated Google sign in.

The startActivityForResult is deprecated and Android introduced the Activity Result APIs as an alternative in the androidx.activity:activity:1.2.0 and androidx.activity:activity-ktx:1.2.0 releases. So, we will cover this new Activity Result API directly here which you can use in your project to call google sign in rather than using the deprecated startActivityForResult.

This API improves code readability, avoids using request code, improves type safety.

2. StartActivityForResult Activity Result API

The Activity Result APIs provide the registerForActivityResult in place of startActivityForResult + onActivityResult.

The registerForActivityResult method takes the following two parameters and returns ActivityResultLauncher as output:

1. ActivityResultContracts

A contract defines the type of action or interaction (Intent) requested from an activity. After getting the result from the activity, it then produces the output of a particular type that makes calling activity for result type-safe.

A collection of standard ActivityResultContracts are available for use. Among the contracts available, the StartActivityForResult contract is the replacement to the startActivityForResult. So we will use the StartActivityForResult contract in this article.

2. ActivityResultCallback

The callback is to be called once the activity result is available. Whatever code you plan to write in your old onActivityResult method must be placed here.

2.1. startActivityForResult deprecated google sign in example

For example, the below registerForActivityResult method takes the ActivityResultContracts.StartActivityForResult as contract and then returns the ActivityResultLauncher as output. As we are well aware of the output type, it is type-safe.

You can check whether the result code is OK and handle the response.

var resultLauncher = registerForActivityResult(
    ActivityResultContracts.StartActivityForResult()) { result ->
    if (result.resultCode == Activity.RESULT_OK) {
       // parse result and perform action
    }
}

Once you have the ActivityResultLauncher, you can launch the google sign-in activity using the launch method:

val gso = GoogleSignInOptions
        .Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
        .requestEmail()
        .requestProfile()
        .requestScopes(Scope(DriveScopes.DRIVE))
        .build()
val mGoogleSignInClient = GoogleSignIn.getClient(this, gso)
val signInIntent = mGoogleSignInClient.signInIntent
launcher.launch(signInIntent)

Notice that we haven’t passed any request code here as registerForActivityResult automatically takes care of everything.

4. Conclusion

To sum up, we have discussed the Activity Result API available from androidx 1.2.0 releases as an alternative to the deprecated startActivityForResult google sign in. You can also refer settings panel article where we are using the Activity Result API for launching the settings panel.

You can also check out our article on Activity Result API for request permissions.