tmZdanie

Question 1

Uprawnienia do odpalenia aparatu

Answer 1

3 wpisy w AndroidManifest.xml (do androiad 6.0):

Question 2

Sprawdzenie w kodzie czy ma się uprawnienie do kamery (kotlin)

Answer 2

ContextCompat.checkSelfPermission(
this,
Manifest.permission.CAMERA
) == PackageManager.PERMISSION_GRANTED -> {
// zrób coś, np wyświetl komunikat
Toast.makeText(getApplicationContext(), “Mam kamere!!!”, Toast.LENGTH_SHORT).show();
}

Question 3

Sprawdzenie czy ma się uprawnienie do kamery i jeśli tak wyświetlenie zdjęcia

Answer 3

if (getApplicationContext().getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA)) {
Toast.makeText(getApplicationContext(), “Mam kamere!!!”, Toast.LENGTH_SHORT).show();
}

Question 4

Proszenie o uprawnienia

Answer 4

when {
ContextCompat.checkSelfPermission(
CONTEXT,
Manifest.permission.REQUESTED_PERMISSION
) == PackageManager.PERMISSION_GRANTED -> {
// You can use the API that requires the permission.
}
shouldShowRequestPermissionRationale(…) -> {
// In an educational UI, explain to the user why your app requires this
// permission for a specific feature to behave as expected. In this UI,
// include a “cancel” or “no thanks” button that allows the user to
// continue using your app without granting the permission.
showInContextUI(…)
}
else -> {
// You can directly ask for the permission.
// The registered ActivityResultCallback gets the result of this request.
requestPermissionLauncher.launch(
Manifest.permission.REQUESTED_PERMISSION)
}
}

Question 5

Nadpisanie funkcji gdy poprawnie uzyskano poprawnienie

Answer 5

override fun onRequestPermissionsResult(requestCode: Int,
        permissions: Array, grantResults: IntArray) {
    when (requestCode) {
        PERMISSION_REQUEST_CODE -> {
            // If request is cancelled, the result arrays are empty.
            if ((grantResults.isNotEmpty() &&
                    grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
                // Permission is granted. Continue the action or workflow
                // in your app.
            } else {
                // Explain to the user that the feature is unavailable because
                // the features requires a permission that the user has denied.
                // At the same time, respect the user's decision. Don't link to
                // system settings in an effort to convince the user to change
                // their decision.
            }
            return
        }

        // Add other 'when' lines to check for other
        // permissions this app might request.
        else -> {
            // Ignore all other requests.
        }
    }
}

Question 6

jeżeli chcemy mieć pewność, że sterowanie do nas wróci to można wykorzystać

Answer 6

registerForActivityResult

Question 7

Kamera - uprawnienia

Question 8

Sprawdzanie czy ma się kamerkę

Answer 8

if (getApplicationContext().getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA)) {
Toast.makeText(getApplicationContext(), “Mam kamere!!!”, Toast.LENGTH_SHORT).show();
}

Question 9

Lokalizacja GPS - uprawnienia

Answer 9

ACCESS_FINE_LOCATION - dokładna
ACCESS_COARSE_LOCATION - nie aż tak dokładna
ACCESS_BACKGROUND_LOCATION

Question 10

WebView - do pliku xml

Question 11

Akcelerometr

Answer 11

val sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager
val sensor: Sensor? = sensorManager.getDefaultSensor(Sensor.TYPE_LINEAR_ACCELERATION)

Question 12

Żyroskop

Answer 12

val sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager
val sensor: Sensor? = sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE)

Question 13

Uprawnienia do sensorów w xml

Question 14

Mediaplayer odtwarzanie dźwięku

Answer 14

MediaPlayer odtwarzacz = MediaPlayer.create(getApplicationContext(), R.raw.av);
odtwarzacz.start();

Question 15

Odtwarzanie dźwięku z internetu

Answer 15

String adres = “http://ingeb.org/refer/gaudeamu.MP3”; MediaPlayer odtwarzacz = new MediaPlayer(); odtwarzacz.setAudioStreamType( AudioManager.STREAM_MUSIC); odtwarzacz.setDataSource(adres); odtwarzacz.prepare(); odtwarzacz.start();

Question 16

Obsługa ekranu przy wyświetlaniu multimediów

Answer 16

setDisplay()

setScreenOnWhilePlaying(Wł./Wył.)

Question 17

Obsługiwane formaty A/V

Answer 17

Audio: mp3, midi, wave, 3gp
Obraz: jpeg, gif, png, bmp
Video: mp4, 3gp