altos{lib,ui,droid}: move OS specific code out of altoslib

This is to allow the usage of AltosLog on Android - no swing, so
we need to push the "home directory" code used to pick a default
telemetry logging path - using the PreferencesBackend interface
for now.

Signed-off-by: Mike Beattie <mike@ethernal.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/altosui/AltosUIPreferencesBackend.java b/altosui/AltosUIPreferencesBackend.java
index 210dcb8b..3131fd32 100644
--- a/altosui/AltosUIPreferencesBackend.java
+++ b/altosui/AltosUIPreferencesBackend.java
@@ -17,8 +17,10 @@
 
 package altosui;
 
+import java.io.File;
 import java.util.prefs.*;
 import org.altusmetrum.AltosLib.*;
+import javax.swing.filechooser.FileSystemView;
 
 public class AltosUIPreferencesBackend implements AltosPreferencesBackend {
 
@@ -92,4 +94,8 @@ public class AltosUIPreferencesBackend implements AltosPreferencesBackend {
 		}
 	}
 
+	public File homeDirectory() {
+		/* Use the file system view default directory */
+		return FileSystemView.getFileSystemView().getDefaultDirectory();
+	}
 }