66 lines
3 KiB
Text
66 lines
3 KiB
Text
Surviving with Android 4.4 (KitKat) or 5.x (Lollipop) using latest BRouter
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BRouter has some basic support to reclaim your external SD card.
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Brouter must be installed on internal drive ("SD card"), but maps could be moved to external SD card.
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What's new is a configuration file located at:
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brouter/segments4/storageconfig.txt
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which has 2 configuration items:
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"secondary_segment_dir" points to an additional directory containing
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routing data files. This can be located anywhere.
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"additional_maptool_dir" points to a base-directory that should
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be scanned for maptool-installations in addition to the standard-guesses.
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Initially, the value for "secondary_segment_dir" is "../segments3" to support the
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file-format transition from 1.2 to 1.3, so that, after upgrading, your existing
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datafiles are found via the secondary directory.
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However, for surviving KitKatn and later, you are supposed to change that to the
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absolute path to a directory on the external card, e.g.:
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secondary_segment_dir=/storage/external_SD/brouter_segments4
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When searching for datafiles, both the download manager and the router first look in the primary (brouter/segments4) and then in the secondary directory.
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On the other hand, the download manager always writes new datafiles to the primary directory, so the secondary directory is read-only.
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So you can move datafiles downloaded by the download-manager to the secondary directory, by using a file manager, in order to free disk space on the internal card. Or you ca download datafiles directly to the secondary directory by doing manual http downloads
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from http://brouter.de/brouter/segments4
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Depending on how your maptool handles the file-system structure, you are done.
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However, e.g. for OsmAnd it is likely that BRouter still has no access to OsmAnd's waypoint database. The reason is:
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When, after installing OsmAnd, you choose to move it's resources to the external SD Card,
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it moves it to a special directory where it has write-access even with Android 4.4, e.g.:
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/storage/external_SD/Android/data/net.osmand/files
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The package name slightly differs for OsmAnd+.
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This directory is not found automatically by BRouter, so you have to configure
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it as "additional_maptool_dir".
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However, you are still not done, because if BRouter finds a wayoint-database file
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under:
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/storage/external_SD/Android/data/net.osmand/files/osmand/favourites.gpx
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then it decides to write it's tracks to:
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/storage/external_SD/Android/data/net.osmand/files/osmand/tracks
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But this directory is not writable by BRouter. So what you have to do is to create
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a redirection-file (create the tracks folder if it does not exist!)
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/storage/external_SD/Android/data/net.osmand/files/osmand/tracks/brouter.redirect
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and that should contain a single line with the absolute path to the folder where
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the tracks should be written (e.g. /mnt/sdcard/brouter ). Redirection file is normal file named brouter.redirect and containing single line pointing to folder writable by BRouter and readable by OsmAnd.
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THEN you are done.
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