コンストラクターのおかげで、osmdroid のソースを変更せずにこれが可能であることがpublic MapView(Context context, int tileSizePixels, ResourceProxy resourceProxy, MapTileProviderBase aTileProvider)
わかりました。
MySSLSocketFactory
(which ) のようなカスタム クラスが既にあると仮定するとextends javax.net.ssl.SSLSocketFactory
、基本的なプロセスは次のようになります。
MapTileDownloader
を利用する方法でダウンロードを実行するためのドロップイン置換クラスを作成しますMySSLSocketFactory
。これを と呼びましょうMyTileDownloader
。
MapTileProviderBasic
カスタムをインスタンス化するためのドロップイン置換クラスを作成しますMyTileDownloader
。これを と呼びましょうMyTileProvider
。
タイル ソースを としてインスタンス化しますnew XYTileSource
(カスタム クラスを記述する必要はありません)。
MyTileProvider
タイル ソース インスタンスでインスタンス化します。
MapVew
タイル プロバイダー インスタンスでインスタンス化します。
MySSLSocketFactory
読者の演習として残されています。この投稿を参照してください。
MyTileDownloader
次のようになります。
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.UnknownHostException;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSocketFactory;
import org.osmdroid.tileprovider.MapTile;
import org.osmdroid.tileprovider.MapTileRequestState;
import org.osmdroid.tileprovider.modules.IFilesystemCache;
import org.osmdroid.tileprovider.modules.INetworkAvailablityCheck;
import org.osmdroid.tileprovider.modules.MapTileDownloader;
import org.osmdroid.tileprovider.modules.MapTileModuleProviderBase;
import org.osmdroid.tileprovider.tilesource.BitmapTileSourceBase.LowMemoryException;
import org.osmdroid.tileprovider.tilesource.ITileSource;
import org.osmdroid.tileprovider.tilesource.OnlineTileSourceBase;
import org.osmdroid.tileprovider.util.StreamUtils;
import android.graphics.drawable.Drawable;
import android.text.TextUtils;
import android.util.Log;
/**
* A drop-in replacement for {@link MapTileDownloader}. This loads tiles from an
* HTTP or HTTPS server, making use of a custom {@link SSLSocketFactory} for SSL
* peer verification.
*/
public class MyTileDownloader extends MapTileModuleProviderBase {
private static final String TAG = "MyMapTileDownloader";
protected OnlineTileSourceBase mTileSource;
protected final IFilesystemCache mFilesystemCache;
protected final INetworkAvailablityCheck mNetworkAvailablityCheck;
protected final SSLSocketFactory mSSLSocketFactory;
public MyTileDownloader(ITileSource pTileSource,
IFilesystemCache pFilesystemCache,
INetworkAvailablityCheck pNetworkAvailablityCheck,
SSLSocketFactory pSSLSocketFactory) {
super(4, TILE_DOWNLOAD_MAXIMUM_QUEUE_SIZE);
setTileSource(pTileSource);
mFilesystemCache = pFilesystemCache;
mNetworkAvailablityCheck = pNetworkAvailablityCheck;
mSSLSocketFactory = pSSLSocketFactory;
}
public ITileSource getTileSource() {
return mTileSource;
}
@Override
public void setTileSource(final ITileSource tileSource) {
// We are only interested in OnlineTileSourceBase tile sources
if (tileSource instanceof OnlineTileSourceBase)
mTileSource = (OnlineTileSourceBase) tileSource;
else
mTileSource = null;
}
@Override
public boolean getUsesDataConnection() {
return true;
}
@Override
protected String getName() {
return "Online Tile Download Provider";
}
@Override
protected String getThreadGroupName() {
return "downloader";
}
@Override
public int getMinimumZoomLevel() {
return (mTileSource != null ? mTileSource.getMinimumZoomLevel()
: MINIMUM_ZOOMLEVEL);
}
@Override
public int getMaximumZoomLevel() {
return (mTileSource != null ? mTileSource.getMaximumZoomLevel()
: MAXIMUM_ZOOMLEVEL);
}
@Override
protected Runnable getTileLoader() {
return new TileLoader();
};
private class TileLoader extends MapTileModuleProviderBase.TileLoader {
@Override
public Drawable loadTile(final MapTileRequestState aState)
throws CantContinueException {
if (mTileSource == null)
return null;
InputStream in = null;
OutputStream out = null;
final MapTile tile = aState.getMapTile();
try {
if (mNetworkAvailablityCheck != null
&& !mNetworkAvailablityCheck.getNetworkAvailable()) {
if (DEBUGMODE)
Log.d(TAG, "Skipping " + getName()
+ " due to NetworkAvailabliltyCheck.");
return null;
}
final String tileURLString = mTileSource.getTileURLString(tile);
if (DEBUGMODE)
Log.d(TAG, "Downloading Maptile from url: " + tileURLString);
if (TextUtils.isEmpty(tileURLString))
return null;
// Create an HttpURLConnection to download the tile
URL url = new URL(tileURLString);
HttpURLConnection connection = (HttpURLConnection) url
.openConnection();
connection.setConnectTimeout(30000);
connection.setReadTimeout(30000);
// Use our custom SSLSocketFactory for secure connections
if ("https".equalsIgnoreCase(url.getProtocol()))
((HttpsURLConnection) connection)
.setSSLSocketFactory(mSSLSocketFactory);
// Open the input stream
in = new BufferedInputStream(connection.getInputStream(),
StreamUtils.IO_BUFFER_SIZE);
// Check to see if we got success
if (connection.getResponseCode() != 200) {
Log.w(TAG, "Problem downloading MapTile: " + tile
+ " HTTP response: " + connection.getHeaderField(0));
return null;
}
// Read the tile into an in-memory byte array
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream,
StreamUtils.IO_BUFFER_SIZE);
StreamUtils.copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
final ByteArrayInputStream byteStream = new ByteArrayInputStream(
data);
// Save the data to the filesystem cache
if (mFilesystemCache != null) {
mFilesystemCache.saveFile(mTileSource, tile, byteStream);
byteStream.reset();
}
final Drawable result = mTileSource.getDrawable(byteStream);
return result;
} catch (final UnknownHostException e) {
Log.w(TAG, "UnknownHostException downloading MapTile: " + tile
+ " : " + e);
throw new CantContinueException(e);
} catch (final LowMemoryException e) {
Log.w(TAG, "LowMemoryException downloading MapTile: " + tile
+ " : " + e);
throw new CantContinueException(e);
} catch (final FileNotFoundException e) {
Log.w(TAG, "Tile not found: " + tile + " : " + e);
} catch (final IOException e) {
Log.w(TAG, "IOException downloading MapTile: " + tile + " : "
+ e);
} catch (final Throwable e) {
Log.e(TAG, "Error downloading MapTile: " + tile, e);
} finally {
StreamUtils.closeStream(in);
StreamUtils.closeStream(out);
}
return null;
}
@Override
protected void tileLoaded(final MapTileRequestState pState,
final Drawable pDrawable) {
// Don't return the tile Drawable because we'll wait for the fs
// provider to ask for it. This prevent flickering when a load
// of delayed downloads complete for tiles that we might not
// even be interested in any more.
super.tileLoaded(pState, null);
}
}
}
MyTileProvider
このように見えます。
MySSLSocketFactory
このクラス内のインスタンスにアクセスする方法が必要になることに注意してください。これは、読者の演習として残されています。を使用してこれをapp.getSSLSocketFactory()
行いましたapp
が、 はカスタム クラスのインスタンスですextends Application
が、マイレージは異なる場合があります。
import javax.net.ssl.SSLSocketFactory;
import org.osmdroid.tileprovider.IMapTileProviderCallback;
import org.osmdroid.tileprovider.IRegisterReceiver;
import org.osmdroid.tileprovider.MapTileProviderArray;
import org.osmdroid.tileprovider.MapTileProviderBasic;
import org.osmdroid.tileprovider.modules.INetworkAvailablityCheck;
import org.osmdroid.tileprovider.modules.MapTileFileArchiveProvider;
import org.osmdroid.tileprovider.modules.MapTileFilesystemProvider;
import org.osmdroid.tileprovider.modules.NetworkAvailabliltyCheck;
import org.osmdroid.tileprovider.modules.TileWriter;
import org.osmdroid.tileprovider.tilesource.ITileSource;
import org.osmdroid.tileprovider.util.SimpleRegisterReceiver;
import android.content.Context;
/**
* A drop-in replacement for {@link MapTileProviderBasic}. This top-level tile
* provider implements a basic tile request chain which includes a
* {@link MapTileFilesystemProvider} (a file-system cache), a
* {@link MapTileFileArchiveProvider} (archive provider), and a
* {@link MyTileDownloader} (downloads map tiles via tile source).
*/
public class MyTileProvider extends MapTileProviderArray implements
IMapTileProviderCallback {
public MyTileProvider(final Context pContext, final ITileSource pTileSource) {
this(new SimpleRegisterReceiver(pContext),
new NetworkAvailabliltyCheck(pContext), pTileSource, app
.getSSLSocketFactory());
}
protected MyTileProvider(final IRegisterReceiver pRegisterReceiver,
final INetworkAvailablityCheck aNetworkAvailablityCheck,
final ITileSource pTileSource,
final SSLSocketFactory pSSLSocketFactory) {
super(pTileSource, pRegisterReceiver);
// Look for raw tiles on the file system
final MapTileFilesystemProvider fileSystemProvider = new MapTileFilesystemProvider(
pRegisterReceiver, pTileSource);
mTileProviderList.add(fileSystemProvider);
// Look for tile archives on the file system
final MapTileFileArchiveProvider archiveProvider = new MapTileFileArchiveProvider(
pRegisterReceiver, pTileSource);
mTileProviderList.add(archiveProvider);
// Look for raw tiles on the Internet
final TileWriter tileWriter = new TileWriter();
final MyTileDownloader downloaderProvider = new MyTileDownloader(
pTileSource, tileWriter, aNetworkAvailablityCheck,
pSSLSocketFactory);
mTileProviderList.add(downloaderProvider);
}
}
最終的に、インスタンス化は次のようになります。
XYTileSource tileSource = new XYTileSource("MapQuest", null, 3, 8, 256, ".jpg",
"https://10.0.0.1/path/to/your/map/tiles/");
MapTileProviderBase tileProvider = new MyTileProvider(context, tileSource);
ResourceProxy resourceProxy = new DefaultResourceProxyImpl(context);
MapView mapView = new MapView(context, 256, resourceProxy, tileProvider);