Phonegap / Cordova App breaks in Jelly Bean - Access-Control-Allow-Origin and setAllowUniversalAccessFromFileURLs

Question

I’ve been developing * with Cordova (aka Phonegap) for Android for over a year now and have been trying to make my applications available for use in Bean jelly, but I get the following error:

XMLHttpRequest cannot load http://127.0.0.1:40582/[somerandomstring]. Origin null is not allowed by Access-Control-Allow-Origin. at null:1 

(and similar errors for any subsequent ajax requesting the use of localhost or a file: //) Just for testing, I give access to everything in the config.xml file in the Access-Control-Allow-Origin section

 <access origin="*"/> <access origin="http://127.0.0.1*"/> 

In my research, I found that the error was related to the settings change that Google made with Android Jelly Bean. Here is what I found: From: https://git-wip-us.apache.org/repos/asf?p=incubator-cordova-android.git;a=commitdiff;h=07439ff9

- This is from org.apache.cordova.CordovaWebView

 // Jellybean rightfully tried to lock this down. Too bad they didn't give us a whitelist // while we do this if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) Level16Apis.enableUniversalAccess(settings); 

- This is also from org.apache.cordova.CordovaWebView

 // Wrapping these functions in their own class prevents warnings in adb like: // VFY: unable to resolve virtual method 285: Landroid/webkit/WebSettings;.setAllowUniversalAccessFromFileURLs @TargetApi(16) private static class Level16Apis { static void enableUniversalAccess(WebSettings settings) { settings.setAllowUniversalAccessFromFileURLs(true); } } 

It’s good that Cordoba tried to get around the changes, but, unfortunately, this does not work ...

In these SO threads here and here, I found a general solution by simply changing the setting as follows:

 if(android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) { super.appView.getSettings().setAllowUniversalAccessFromFileURLs(true); } 

Now I get the following warning:

 Call requires API level 16 (current min is 8) android.webkit.WebSettings#setAllowUniversalAccessFromFileURLs 

Here is what I have for api in AndroidManifest.xml

 <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16" /> 

Why do I need to change minSdkVersion to 16, and not follow my targetSdkVersion, which is 16?

Thoughts?

Notes . I am currently using Cordova 2.0, Eclipse Indigo SR2 (all current updates), Android SDK (all updates currently), on Windows 7 Home (all current updates), Java 7 7 update.

Answer 1

OK, so after a ton of searching, guessing and checking, I found a workable solution.

I had to create a separate function to call setAllowUniversalAccessFromFileURLs ... This fixed the TargetApi problem, but then introduced a different version of JellyBean where it would not connect to the file that I had in my loadURL call, so I had to redefine the onReceivedError function. Here is my code:

 package com.MyUniqueDomain.MyUniquePackage; import android.annotation.TargetApi; import android.os.Bundle; import org.apache.cordova.*; public class MainActivity extends DroidGap { private int retryCount = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); super.setStringProperty("loadingDialog", "Please wait -- loading..."); super.init(); if(android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) { fixJellyBeanIssues(); } super.loadUrl("file:///android_asset/www/index.html"); } @TargetApi(16) protected void fixJellyBeanIssues() { System.out.println(super.appView.toString()); try { super.appView.getSettings().setAllowUniversalAccessFromFileURLs(true); } catch(NullPointerException e) { System.out.println(e.toString()); } } // catch an error and if try again 1x or quit @Override public void onReceivedError( int errorCode, String description, String failingUrl) { if(retryCount < 3) { retryCount++; System.out.println("Connection failed, trying again. Retry Count: "+retryCount); super.loadUrl("file:///android_asset/www/index.html"); } else { System.out.println("Sorry, it failed three times so I give up."); super.loadUrl("file:///android_asset/www/fail.html"); } return; } }