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SampleLieFi.java
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SampleLieFi.java
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package org.osmdroid.samplefragments.tilesources;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import org.osmdroid.samplefragments.BaseSampleFragment;
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.CantContinueException;
import org.osmdroid.tileprovider.modules.IFilesystemCache;
import org.osmdroid.tileprovider.modules.INetworkAvailablityCheck;
import org.osmdroid.tileprovider.modules.MapTileApproximater;
import org.osmdroid.tileprovider.modules.MapTileAssetsProvider;
import org.osmdroid.tileprovider.modules.MapTileDownloader;
import org.osmdroid.tileprovider.modules.MapTileFileArchiveProvider;
import org.osmdroid.tileprovider.modules.MapTileFileStorageProviderBase;
import org.osmdroid.tileprovider.modules.NetworkAvailabliltyCheck;
import org.osmdroid.tileprovider.modules.SqlTileWriter;
import org.osmdroid.tileprovider.tilesource.ITileSource;
import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
import org.osmdroid.tileprovider.util.SimpleRegisterReceiver;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapView;
/**
* Lie Fi demo: we emulate a slow online source in order to show the offline first behavior
*
* @author Fabrice Fontaine
* @since 6.0.2
*/
public class SampleLieFi extends BaseSampleFragment {
private final GeoPoint mInitialCenter = new GeoPoint(41.8905495, 12.4924348); // Rome, Italy
private final double mInitialZoomLevel = 5;
private final int mLieFieLagInMillis = 1000;
@Override
public String getSampleTitle() {
return "Lie Fi - slow online source";
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final MapTileProviderArray provider = new MapTileProviderLieFi(inflater.getContext());
mMapView = new MapView(inflater.getContext(), provider);
return mMapView;
}
@Override
protected void addOverlays() {
super.addOverlays();
mMapView.post(new Runnable() { // "post" because we need View.getWidth() to be set
@Override
public void run() {
mMapView.getController().setZoom(mInitialZoomLevel);
mMapView.setExpectedCenter(mInitialCenter);
}
});
}
private class MapTileProviderLieFi extends MapTileProviderArray implements IMapTileProviderCallback {
private IFilesystemCache tileWriter;
private final INetworkAvailablityCheck mNetworkAvailabilityCheck;
private MapTileProviderLieFi(final Context pContext) {
this(new SimpleRegisterReceiver(pContext), new NetworkAvailabliltyCheck(pContext),
TileSourceFactory.DEFAULT_TILE_SOURCE, pContext, null);
}
private MapTileProviderLieFi(final IRegisterReceiver pRegisterReceiver,
final INetworkAvailablityCheck aNetworkAvailablityCheck, final ITileSource pTileSource,
final Context pContext, final IFilesystemCache cacheWriter) {
super(pTileSource, pRegisterReceiver);
mNetworkAvailabilityCheck = aNetworkAvailablityCheck;
if (cacheWriter != null) {
tileWriter = cacheWriter;
} else {
tileWriter = new SqlTileWriter();
}
final MapTileAssetsProvider assetsProvider = new MapTileAssetsProvider(
pRegisterReceiver, pContext.getAssets(), pTileSource);
mTileProviderList.add(assetsProvider);
final MapTileFileStorageProviderBase cacheProvider =
MapTileProviderBasic.getMapTileFileStorageProviderBase(pRegisterReceiver, pTileSource, tileWriter);
mTileProviderList.add(cacheProvider);
final MapTileFileArchiveProvider archiveProvider = new MapTileFileArchiveProvider(
pRegisterReceiver, pTileSource);
mTileProviderList.add(archiveProvider);
final MapTileApproximater approximationProvider = new MapTileApproximater();
mTileProviderList.add(approximationProvider);
approximationProvider.addProvider(assetsProvider);
approximationProvider.addProvider(cacheProvider);
approximationProvider.addProvider(archiveProvider);
final MapTileDownloader downloaderProvider = new MapTileDownloaderLieFi(pTileSource, tileWriter,
aNetworkAvailablityCheck);
mTileProviderList.add(downloaderProvider);
getTileCache().getProtectedTileContainers().add(this);
}
@Override
public IFilesystemCache getTileWriter() {
return tileWriter;
}
@Override
public void detach() {
//https://github.com/osmdroid/osmdroid/issues/213
//close the writer
if (tileWriter != null)
tileWriter.onDetach();
tileWriter = null;
super.detach();
}
/**
* @since 6.0.3
*/
@Override
protected boolean isDowngradedMode(final long pMapTileIndex) {
return (mNetworkAvailabilityCheck != null && !mNetworkAvailabilityCheck.getNetworkAvailable())
|| !useDataConnection();
}
}
private class MapTileDownloaderLieFi extends MapTileDownloader {
private final MapTileDownloader.TileLoader mTileLoader = new TileLoader();
MapTileDownloaderLieFi(ITileSource pTileSource, IFilesystemCache pFilesystemCache, INetworkAvailablityCheck pNetworkAvailablityCheck) {
super(pTileSource, pFilesystemCache, pNetworkAvailablityCheck);
}
@Override
public MapTileDownloader.TileLoader getTileLoader() {
return mTileLoader;
}
private class TileLoader extends MapTileDownloader.TileLoader {
@Override
protected Drawable downloadTile(long pMapTileIndex, int redirectCount, String targetUrl) throws CantContinueException {
try {
Thread.sleep(mLieFieLagInMillis);
} catch (InterruptedException e) {
//
}
return super.downloadTile(pMapTileIndex, redirectCount, targetUrl);
}
}
}
}