add mapsforge activity to example

vtm-android-example/src/org/oscim/android/filepicker/ValidRenderTheme.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2010, 2011, 2012 mapsforge.org
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.oscim.android.filepicker;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.parsers.SAXParserFactory;
+
+import org.oscim.theme.RenderThemeHandler;
+import org.oscim.tiling.source.TileSource.OpenResult;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.XMLReader;
+
+/**
+ * Accepts all valid render theme XML files.
+ */
+public final class ValidRenderTheme implements ValidFileFilter {
+	private OpenResult mOpenResult;
+
+	@Override
+	public boolean accept(File file) {
+		InputStream inputStream = null;
+
+		try {
+			inputStream = new FileInputStream(file);
+			RenderThemeHandler renderThemeHandler = new RenderThemeHandler();
+			XMLReader xmlReader = SAXParserFactory.newInstance().newSAXParser().getXMLReader();
+			xmlReader.setContentHandler(renderThemeHandler);
+			xmlReader.parse(new InputSource(inputStream));
+			mOpenResult = OpenResult.SUCCESS;
+		} catch (ParserConfigurationException e) {
+			mOpenResult = new OpenResult(e.getMessage());
+		} catch (SAXException e) {
+			mOpenResult = new OpenResult(e.getMessage());
+		} catch (IOException e) {
+			mOpenResult = new OpenResult(e.getMessage());
+		} finally {
+			try {
+				if (inputStream != null) {
+					inputStream.close();
+				}
+			} catch (IOException e) {
+				mOpenResult = new OpenResult(e.getMessage());
+			}
+		}
+
+		return mOpenResult.isSuccess();
+	}
+
+	@Override
+	public OpenResult getFileOpenResult() {
+		return mOpenResult;
+	}
+}