6 files changed, 61 insertions, 15 deletions
diff --git a/src/cgeo/geocaching/googlemaps/googleMapActivity.java b/src/cgeo/geocaching/googlemaps/googleMapActivity.java
index a95b741..3a366dd 100644
--- a/src/cgeo/geocaching/googlemaps/googleMapActivity.java
+++ b/src/cgeo/geocaching/googlemaps/googleMapActivity.java
@@ -4,6 +4,7 @@ import android.app.Activity;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 import cgeo.geocaching.mapcommon.MapBase;
 import cgeo.geocaching.mapcommon.cgeomap;
 import cgeo.geocaching.mapinterfaces.ActivityImpl;
@@ -98,4 +99,14 @@ public class googleMapActivity extends MapActivity implements ActivityImpl {
 		return super.onPrepareOptionsMenu(menu);
 	}
 
+	// close activity and open homescreen
+	public void goHome(View view) {
+		mapBase.goHome(view);
+	}
+
+	// open manual entry
+	public void goManual(View view) {
+		mapBase.goManual(view);
+	}
+
 }
diff --git a/src/cgeo/geocaching/mapcommon/MapBase.java b/src/cgeo/geocaching/mapcommon/MapBase.java
index 2340998..cd4c12d 100644
--- a/src/cgeo/geocaching/mapcommon/MapBase.java
+++ b/src/cgeo/geocaching/mapcommon/MapBase.java
@@ -6,6 +6,7 @@ import android.content.res.Resources;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 
 /**
  * Base class for the map activity. Delegates base class calls to the
@@ -13,7 +14,7 @@ import android.view.MenuItem;
  * @author rsudev
  *
  */
-public class MapBase {
+public abstract class MapBase {
 
 	ActivityImpl mapActivity;
 	
@@ -61,4 +62,8 @@ public class MapBase {
 		return mapActivity.superOnOptionsItemSelected(item);
 	}
 	
+	public abstract void goHome(View view);
+
+	public abstract void goManual(View view);
+
 }
diff --git a/src/cgeo/geocaching/mapcommon/cgeomap.java b/src/cgeo/geocaching/mapcommon/cgeomap.java
index 7ba7532..0722981 100644
--- a/src/cgeo/geocaching/mapcommon/cgeomap.java
+++ b/src/cgeo/geocaching/mapcommon/cgeomap.java
@@ -1,19 +1,26 @@
 package cgeo.geocaching.mapcommon;
 
-import gnu.android.app.appmanualclient.*;
+import gnu.android.app.appmanualclient.AppManualReaderClient;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Locale;
 
 import android.app.Activity;
 import android.app.ProgressDialog;
-import java.util.ArrayList;
-import android.os.Bundle;
-import android.view.Menu;
-import android.view.MenuItem;
 import android.content.DialogInterface;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.graphics.drawable.Drawable;
+import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.WindowManager;
+import android.widget.ImageView;
 import cgeo.geocaching.R;
 import cgeo.geocaching.cgBase;
 import cgeo.geocaching.cgCache;
@@ -35,15 +42,6 @@ import cgeo.geocaching.mapinterfaces.MapFactory;
 import cgeo.geocaching.mapinterfaces.MapViewImpl;
 import cgeo.geocaching.mapinterfaces.UserOverlayItemImpl;
 
-import android.util.Log;
-import android.view.View;
-import android.view.WindowManager;
-import android.widget.ImageView;
-import cgeo.geocaching.cgSearch;
-
-import java.util.HashMap;
-import java.util.Locale;
-
 public class cgeomap extends MapBase {
 
 	private Resources res = null;
diff --git a/src/cgeo/geocaching/mapinterfaces/ActivityImpl.java b/src/cgeo/geocaching/mapinterfaces/ActivityImpl.java
index 1895744..12f00e9 100644
--- a/src/cgeo/geocaching/mapinterfaces/ActivityImpl.java
+++ b/src/cgeo/geocaching/mapinterfaces/ActivityImpl.java
@@ -5,6 +5,7 @@ import android.content.res.Resources;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 
 /**
  * Defines the common functions of the provider-specific
@@ -29,5 +30,9 @@ public interface ActivityImpl {
 	boolean superOnPrepareOptionsMenu(Menu menu);
 
 	boolean superOnOptionsItemSelected(MenuItem item);
+	
+	public abstract void goHome(View view);
+
+	public abstract void goManual(View view);
 
 }
diff --git a/src/cgeo/geocaching/mapsforge/mfMapActivity.java b/src/cgeo/geocaching/mapsforge/mfMapActivity.java
index b878def..1e179dd 100644
--- a/src/cgeo/geocaching/mapsforge/mfMapActivity.java
+++ b/src/cgeo/geocaching/mapsforge/mfMapActivity.java
@@ -6,6 +6,7 @@ import android.app.Activity;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 import cgeo.geocaching.mapcommon.MapBase;
 import cgeo.geocaching.mapcommon.cgeomap;
 import cgeo.geocaching.mapinterfaces.ActivityImpl;
@@ -93,4 +94,14 @@ public class mfMapActivity extends MapActivity implements ActivityImpl {
 	public boolean superOnPrepareOptionsMenu(Menu menu) {
 		return super.onPrepareOptionsMenu(menu);
 	}
+	
+	// close activity and open homescreen
+	public void goHome(View view) {
+		mapBase.goHome(view);
+	}
+
+	// open manual entry
+	public void goManual(View view) {
+		mapBase.goManual(view);
+	}
 }
diff --git a/src/cgeo/geocaching/mapsforge/mfMapView.java b/src/cgeo/geocaching/mapsforge/mfMapView.java
index a68e7c0..e463a26 100644
--- a/src/cgeo/geocaching/mapsforge/mfMapView.java
+++ b/src/cgeo/geocaching/mapsforge/mfMapView.java
@@ -1,6 +1,7 @@
 package cgeo.geocaching.mapsforge;
 
 import org.mapsforge.android.maps.GeoPoint;
+import org.mapsforge.android.maps.MapDatabase;
 import org.mapsforge.android.maps.MapView;
 import org.mapsforge.android.maps.MapViewMode;
 import org.mapsforge.android.maps.Overlay;
@@ -136,6 +137,21 @@ public class mfMapView extends MapView implements MapViewImpl {
 	public void setBuiltinScale(boolean b) {
 		setScaleBar(b);
 	}
+	
+	/**
+	 * Checks whether a given file is a valid map file.
+	 * 
+	 * @param file
+	 *            the path to the map file that should be tested.
+	 * @return true if the file is a valid map file, false otherwise.
+	 */
+	public static boolean isValidMapFile(String file) {
+		MapDatabase testDatabase = new MapDatabase();
+		boolean isValid = testDatabase.openFile(file);
+		testDatabase.closeFile();
+		return isValid;
+	}
+
 
 	@Override
 	public void setMapSource(cgSettings settings) {