new tile management

mobile/src/com/cradle/iitc_mobile/IITC_TileManager.java

@@ -0,0 +1,44 @@
+package com.cradle.iitc_mobile;
+
+import android.util.Log;
+import android.webkit.WebResourceResponse;
+
+import com.cradle.iitc_mobile.async.DownloadTile;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+
+public class IITC_TileManager {
+
+    private final IITC_Mobile mIitc;
+    private static final String TYPE = "image/*";
+    private static final String ENCODING = null;
+
+    IITC_TileManager(IITC_Mobile iitc) {
+        mIitc = iitc;
+    }
+
+    public WebResourceResponse getTile(String url) throws Exception {
+        Log.d("iitcm", "checking for tile: " + url);
+        String path = mIitc.getApplication().getFilesDir().toString() + "/" + url;
+        path = path.replace("http://", "");
+        path = path.replace("https://", "");
+        String[] split = path.split("/");
+        String fileName = split[split.length - 1];
+        path = path.replace(fileName, "");
+        File file = new File(path, fileName);
+        if (file.exists()) {
+            InputStream in = new BufferedInputStream(new FileInputStream(file));
+            return new WebResourceResponse(TYPE, ENCODING, in);
+        } else {
+            // asynchronously download tile to cache and let webviewclient load the resource
+            new DownloadTile(path, fileName).execute(url);
+            return null;
+        }
+    }
+}