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Android - Basic Steps (Permissions)

Permissions

User Permissions

  • Are declared in the AndroidManifest.xml as strings
  • They are in the tag <user-permission>
    • <user-permission android:name="android.permission.CAMERA">
    • <user-permission android:name="android.permission.INTERNET">
    • <uses-permission android:name="android.permission.READ_CONTACTS" > - Allows to read the contact information from your list
  • These permissions must be accepted before the application runs

App Permissions

  • The application's permissions to interact with another application is specified in the tag <permission>

How to use permissions between Apps

  • Invoking application
    • In the AndroidManifest.xml add the <user-permission> that is allow by the application
      • <uses-permission android:name="course.examples.permissionexample.BOOM_PERM" />
  • Calling application
    • In the AndroidManifest.xml define the permission with the tag <permission>
    <permission
            android:name="course.examples.permissionexample.BOOM_PERM"
            android:description="@string/boom_perm_string"
            android:label="@string/boom_permission_label_string">
        </permission>

    Component Permissions

    • Take precedence over application permissions
    • Checked within execution of:
      • startActivity()
      • startActivityForReult()
    • Throws securityException on failure case

    Types of Component Permissions

    • Activity Permissions
      • Checked within execution of 
        • startActivity
        • startActivityForResult
    • Service Permissions
      • Checked within execution of 
        • Context.startService()
        • Context.stopService()
        • Context.bindService()
    • BroadcasterReceiver Permissions
      • Restrict which components can send & receive broadcasts
    • ContentProvider Permissions
      • Restrict which components can read & write data in a ContentProvider

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