Permissions and Device Features
Runtime permissions, Camera, Location, Sensors, Bluetooth, NFC, Telephony and device feature detection
1What is the difference between Normal and Dangerous permissions?
What is the difference between Normal and Dangerous permissions?
Odpowiedź
Normal permissions are automatically granted at install time (e.g., INTERNET, VIBRATE). Dangerous permissions require explicit user consent at runtime since Android 6.0 (e.g., CAMERA, LOCATION) because they affect privacy.
2How to request a runtime permission in Android?
How to request a runtime permission in Android?
Odpowiedź
First check with checkSelfPermission(), then request with requestPermissions() or the modern Permission Launcher (registerForActivityResult). Handle the response in onRequestPermissionsResult() or in the launcher callback.
3What is ActivityCompat.checkSelfPermission() used for?
What is ActivityCompat.checkSelfPermission() used for?
Odpowiedź
The checkSelfPermission() method checks whether a permission is currently granted. It returns PERMISSION_GRANTED if granted, PERMISSION_DENIED otherwise. Always check before using a permission‑protected feature.
What are permission groups?
What is shouldShowRequestPermissionRationale() used for?
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