How to open android default apps activity in setting via Intent?

Question

How to open the default handler page in the android setting via intent? or How we can open directly the default SMS page?

it seems from android Q to upper we can not Telephony.Sms.Intents.ACTION_CHANGE_DEFAULT

Answer 1

Found the answer, you can open this page by this code:

//This code will work only on android version N and above
//Add if condition to prevent crash on older devices

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        Intent intent = new Intent(Settings.ACTION_MANAGE_DEFAULT_APPS_SETTINGS);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        if (requestCode != -1)
             act.startActivityForResult(intent, requestCode);
        else
             act.startActivity(intent);
    }

Answer 2

Another way with this code to open an intent default app, in this case, I try to set the default launcher app

// dialog set default app
@RequiresApi(Build.VERSION_CODES.Q)
private fun showLauncherSelection() {
    val roleManager = this.getSystemService(Context.ROLE_SERVICE)
            as RoleManager
    if (roleManager.isRoleAvailable(RoleManager.ROLE_HOME) &&
        !roleManager.isRoleHeld(RoleManager.ROLE_HOME)
    ) {
        val intent = roleManager.createRequestRoleIntent(RoleManager.ROLE_HOME)
        startActivityForResult(intent,0)
    }
}

You can set the other Default app with change the ROLE_HOME following this Role Manager . If you want to change SMS default app, try to change the ROLE_HOME to ROLE_SMS