Manifest Permissions

Declaring Permissions in the Manifest

Every permission is declared with <uses-permission>; its protection level decides the rest:

Android permission types
Type	Granted	Examples
Normal	At install, silently	INTERNET, VIBRATE, ACCESS_NETWORK_STATE
Signature	At install, only to apps signed like the definer	Autofill and VPN services, your own app suite
Dangerous (runtime)	By the user, via a dialog	CAMERA, RECORD_AUDIO, ACCESS_FINE_LOCATION
Special	By the user, in a Settings screen	SYSTEM_ALERT_WINDOW, SCHEDULE_EXACT_ALARM

BookNest marks the camera feature optional, or Google Play 1 hides it from devices without a camera:

The additions to BookNest's manifest (AndroidManifest.xml, excerpt)HTML

  <uses-permission android:name="android.permission.CAMERA" />
  <uses-feature android:name="android.hardware.camera" android:required="false" />
...
      <intent-filter>                                  <!-- booknest://book/<id> -->
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="booknest" android:host="book" />
      </intent-filter>
    </activity>
    <activity android:name=".NoteActivity" android:exported="false" />

Library manifests merge into yours and can add permissions you never wrote, as androidx.core did in the merged manifest of AndroidManifest.xml, so read the merged manifest before every release.

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