LoadBCRExt

Load a BCR file from external directory. More...

Variables
static final int	MSG_RI_LOAD_BCR_FROM_EXTERNAL_DIR = 303

Detailed Description

Load a BCR file from external directory.

Loads a BCR file from an external directory, copies it to the bcr directory of the Navigator (normally located under /sdcard/Android/data/com.ptvag.navigation.app/files/bcr/) and fills the target station vector with the stations found in the BCR.
A file with the same name in the bcr directory will be overwritten by this function.
Attention: The client software must use a FileProvider to grant access to the file.

Loading a bcr is done by using the android FileProvider class to be able to grant the foreign navigator app access to files of this client (needed for Android 10/11). The steps to grant a permission is as following:

• Create an xml file in the res/xml folder of your project and list all directories in your app namespace that should be able to be accessed from outside, see the res/xml/filepaths.xml file in this project as an example.

• Add a FileProvider to the manifest file (in the application section). Set the android:resource to above created xml file

  <provider android:name="androidx.core.content.FileProvider" android:authorities="com.ptvag.navigation.ritest.fileprovider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/filepaths" /> </provider>

• Create a file object with the file you want to transfer/share
• Create an uri for that file with FileProvider.getUriForFile()
• Grant access permissions to this file for a specific package (here we use the navigator as the receiver) with getContext().grantUriPermission(). Use FLAG_GRANT_READ_URI_PERMISSION for minimal reading permission
• If wanted, you can revoke the permission after the navigator sent back the response that the bcr was loaded (the navigator will copy the bcr to the navigator bcr directory (files with the same name will be overwritten) to be able to access it, and therefore it is save to revoke the permission after the navigator response).

For more implementation details, please see the RITest demo app.

The visited flags of the target stations will also be set as found.

Sending bundle:

Key	Value	Type	Info
FileName	The name of the BCR file with path as uri	String

Returned error codes:

RI_ERROR_NONE if everything is ok.
RI_ERROR_RI_DISABLED if the Remote Interface service is disabled and/or not licensed.
RI_ERROR_IS_INITIALIZING if the Remote Interface service is not initialized yet.
RI_ERROR_FILE_ACCESS if the file could not be loaded (either because of not granted permissions or of other load error). RI_ERROR_BCR error loading BCR file.