added option: move cache to external storage

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

@@ -0,0 +1,17 @@
+package com.cradle.iitc_mobile;
+
+import android.app.Application;
+import android.preference.PreferenceManager;
+
+import java.io.File;
+
+public class IITC_Application extends Application {
+    @Override
+    public File getCacheDir() {
+        if (PreferenceManager.getDefaultSharedPreferences(this).getBoolean("pref_external_storage", false)) {
+            return (getExternalCacheDir() != null) ? getExternalCacheDir() : super.getCacheDir();
+        } else {
+            return super.getCacheDir();
+        }
+    }
+}

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

@@ -30,6 +30,7 @@ import android.widget.Toast;
 
 import com.cradle.iitc_mobile.IITC_NavigationHelper.Pane;
 
+import java.io.File;
 import java.io.IOException;
 import java.net.URISyntaxException;
 import java.util.Locale;
@@ -130,7 +131,8 @@ public class IITC_Mobile extends Activity implements OnSharedPreferenceChangeLis
             mIitcWebView.updateCaching(false);
         } else if (key.equals("pref_press_twice_to_exit")
                 || key.equals("pref_share_selected_tab")
-                || key.equals("pref_messages"))
+                || key.equals("pref_messages")
+                || key.equals("pref_external_storage"))
             // no reload needed
             return;
 
@@ -481,6 +483,11 @@ public class IITC_Mobile extends Activity implements OnSharedPreferenceChangeLis
         }
     }
 
+    @Override
+    public File getCacheDir() {
+        return getApplicationContext().getCacheDir();
+    }
+
     public void reloadIITC() {
         mNavigationHelper.reset();
         mMapSettings.reset();

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

@@ -44,10 +44,8 @@ public class IITC_WebView extends WebView {
         mSettings.setAllowFileAccess(true);
         mSettings.setGeolocationEnabled(true);
         mSettings.setAppCacheEnabled(true);
-        mSettings.setDatabasePath(getContext().getApplicationInfo().dataDir
-                + "/databases/");
-        mSettings.setAppCachePath(getContext().getCacheDir()
-                .getAbsolutePath());
+        mSettings.setDatabasePath(getContext().getApplicationInfo().dataDir + "/databases/");
+        mSettings.setAppCachePath(getContext().getCacheDir().getAbsolutePath());
         mJsInterface = new IITC_JSInterface((IITC_Mobile) mContext);
         addJavascriptInterface(mJsInterface, "android");
         mSharedPrefs = PreferenceManager.getDefaultSharedPreferences(mContext);