create an async task for online js parsing

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

@@ -68,15 +68,15 @@ public class IITC_DeviceAccountLogin implements AccountManagerCallback<Bundle> {
      */
     private final DialogInterface.OnClickListener onClickListener =
             new DialogInterface.OnClickListener() {
-        @Override
+                @Override
-        public void onClick(DialogInterface dialog, int index) {
+                public void onClick(DialogInterface dialog, int index) {
-            if (index >= 0 && index < mAccounts.length) {
+                    if (index >= 0 && index < mAccounts.length) {
-                mAccount = mAccounts[index];
+                        mAccount = mAccounts[index];
-                startAuthentication();
+                        startAuthentication();
-            }
+                    }
-            dialog.cancel();
+                    dialog.cancel();
-        }
+                }
-    };
+            };
 
     public IITC_DeviceAccountLogin(IITC_Mobile activity, WebView webView,
                                    WebViewClient webViewClient) {

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

@@ -66,10 +66,6 @@ public class IITC_Mobile extends Activity {
         // enable progress bar above action bar
         requestWindowFeature(Window.FEATURE_PROGRESS);
 
-        // TODO build an async task for url.openStream() in IITC_WebViewClient
-        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
-                .permitAll().build();
-        StrictMode.setThreadPolicy(policy);
         setContentView(R.layout.activity_main);
         iitc_view = (IITC_WebView) findViewById(R.id.iitc_webview);
 

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

@@ -17,6 +17,8 @@ import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.widget.Toast;
 
+import com.cradle.iitc_mobile.async.UrlContentToString;
+
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.FileNotFoundException;
@@ -24,6 +26,9 @@ import java.io.IOException;
 import java.net.URL;
 import java.util.Map;
 import java.util.Scanner;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
 
 public class IITC_WebViewClient extends WebViewClient {
     private static final ByteArrayInputStream style = new ByteArrayInputStream(
@@ -90,8 +95,21 @@ public class IITC_WebViewClient extends WebViewClient {
             // load iitc script from web or asset folder
             if (iitc_source.contains("http")) {
                 URL url = new URL(iitc_source);
-                js = new Scanner(url.openStream(), "UTF-8").useDelimiter("\\A")
+                // if url.openStream() is parsed from a scanner
-                        .next();
+                // the NetworkOnMainThread exception is thrown
+                // use a async task for this
+                try {
+                    js = new UrlContentToString().execute(url).get(5, TimeUnit.SECONDS);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                    js = this.fileToString("total-conversion-build.user.js", true);
+                } catch (ExecutionException e) {
+                    e.printStackTrace();
+                    js = this.fileToString("total-conversion-build.user.js", true);
+                } catch (TimeoutException e) {
+                    e.printStackTrace();
+                    js = this.fileToString("total-conversion-build.user.js", true);
+                }
             } else {
                 js = this.fileToString("total-conversion-build.user.js", true);
             }

mobile/src/com/cradle/iitc_mobile/async/UrlContentToString.java

@@ -0,0 +1,31 @@
+package com.cradle.iitc_mobile.async;
+
+import android.os.AsyncTask;
+
+import com.cradle.iitc_mobile.IITC_Mobile;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.Scanner;
+
+/*
+ * this class parses the content of an web page.
+ * since network operations shouldn't be done on main UI thread
+ * we use an async task for this.
+ */
+public class UrlContentToString extends AsyncTask<URL, Integer, String> {
+
+    @Override
+    protected String doInBackground(URL... urls) {
+        String js = "";
+        URL url = urls[0];
+        try {
+            js = new Scanner(url.openStream(), "UTF-8").useDelimiter("\\A")
+                    .next();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return js;
+    }
+
+}