ActivityResultContracts.RequestMultiplePermissions チートシート

最近はパーミッション関連の処理が随分と簡潔に書けるようになったのは嬉しいのだけれども、なにが困るってJavaで書かなければならない時に少し混乱することがあるのでチートシートとして

• ActivityResultContracts.RequestMultiplePermissions  |  Android Developers
• Getting a result from an activity  |  Android Developers

Java

private final ActivityResultLauncher<String[]> requestPermissionsLauncher =
        registerForActivityResult(
                new ActivityResultContracts.RequestMultiplePermissions(),
                (Map<String, Boolean> grantStates) -> {
                    for (Map.Entry<String, Boolean> grantState : grantStates.entrySet()) {
                        Timber.d(grantState.getKey() + " - " + grantState.getValue());
                    }
                });

private void requestPermissions() {
    requestPermissionsLauncher.launch(new String[]{
            Manifest.permission.Foo,
            Manifest.permission.Bar
    });
} 

Kotlin

private val requestPermissionsLauncher =
        registerForActivityResult(RequestMultiplePermissions()) { grantStates: Map<String, Boolean> ->
            for ((permission, granted) in grantStates) {
                Timber.d("$permission - $granted")
            }
        }

private fun requestPermissions() {
    requestPermissionsLauncher.launch(arrayOf(
            Manifest.permission.Foo,
            Manifest.permission.Bar
    ))
}