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improved tile caching by merging equal domains in one folder

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This commit is contained in:
Philipp Schaefer 2014-01-03 12:29:39 +01:00
parent 9976900255
commit cfdaf17ee6
2 changed files with 26 additions and 3 deletions
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28
mobile/src/com/cradle/iitc_mobile/IITC_TileManager.java
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@ -8,6 +8,7 @@ import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.URL;
public class IITC_TileManager {
@ -20,12 +21,33 @@ public class IITC_TileManager {
}
public WebResourceResponse getTile(String url) throws Exception {
String path = mIitc.getApplication().getFilesDir().toString() + "/" + url;
path = path.replace("http://", "");
path = path.replace("https://", "");
/*
* We want to merge equal top lvl domains into one folder.
* This saves traffic since many tile providers get one and the same tile from different subdomains.
* Furthermore, it is easier for users to extend their tile-cache by tiles downloaded from PC.
*/
URL uri = new URL(url);
String tileHoster = uri.getHost();
String[] subdomains = tileHoster.split("\\.");
String hostId = subdomains[subdomains.length - 2] + "." + subdomains[subdomains.length - 1];
/*
* now get the file path...example path:
* /storage/emulated/0/Android/data/com.cradle.iitc_mobile/files/mqcdn.com/tiles/1.0.0/map/18/137397/89580.jpg
*/
String filePath = uri.getPath();
String path = mIitc.getApplication().getFilesDir().toString() + "/" + hostId + filePath;
if (uri.getQuery() != null) path += uri.getQuery();
/*
* unfortunately, the filename is included in our path. since we may need to create directories,
* we need filename and filepath split.
*/
String[] split = path.split("/");
String fileName = split[split.length - 1];
path = path.replace(fileName, "");
// do the tile management
File file = new File(path, fileName);
if (file.exists()) {
// asynchronously download tile if outdated, ignore date if not connected to wifi

1
mobile/src/com/cradle/iitc_mobile/IITC_WebViewClient.java
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@ -289,6 +289,7 @@ public class IITC_WebViewClient extends WebViewClient {
if (url.matches(".*tile.*jpg.*") // mapquest tiles | ovi tiles
|| url.matches(".*tile.*png.*") // cloudmade tiles
|| url.matches(".*mts.*googleapis.*smartmaps") // google tiles
|| url.matches(".*khms.*googleapis.*") // google satellite tiles
|| url.matches(".*tile.*jpeg.*") // bing tiles
|| url.matches(".*maps.*yandex.*tiles.*") // yandex maps
) {