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POInclude an early version of android framework JAR in my application APK?
 

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  1. POInclude an early version of android framework JAR in my application APK?
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    <p>I have built an Android app that worked fine on Android 2.3.* and 4.0.*. However, after upgrading my device to Jelly Bean (4.1.1), I found my app does not work properly (crashes, ANRs, etc.) any more.</p> <p>As a temporary workaround, I am wondering if it is possible to pack an earlier version (say Android 2.3) of the Android framework JAR into my APK and force all my code to use classes/APIs in that JAR?</p> <p>I think including the JAR in my APK should be easier. But I have no idea how I could force my code to use classes/APIs in the JAR during run-time.</p> <p>I know it is not a decent fix (hacking, package size, legal issue, etc.) even it will work. But I am just curious whether it is feasible.</p> <p>Any suggestions or hints would be appreciated!</p> <h2>(Edit)</h2> <p>I have tried the following:</p> <ol> <li>Extracted the <strong>/system/framework/framework.odex</strong> from an Android 2.3 ROM;</li> <li>Deodexed it and converted it into a JAR file (say framework.jar);</li> <li>I verified framework.jar and it contains the actual framework code, not stub methods;</li> <li>Put framework.jar into the libs folder of my project and built out the APK; </li> <li>I verified the result APK and the android framework classes are indeed included.</li> </ol> <p>However, it seems my code is still using the classes/APIs of the actual version of SDK installed in the Android device. :(</p> <h2>(Edit)</h2> <p>It seems all the framework/core classes are already pre-loaded from the device (/system/framework/framework.odex) by Zygote during system boot-up time, for performance reason. So even I have included those classes in our APK, the pre-loaded ones will still be instantiated instead.</p> <p>This sounds like a dead end to me... :(</p>
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    1. COthat's probably not a good idea.. you can limit your app downloads through the maxSdk property in your manifest. then fix your bugs and remove it ..
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      1. USRan
    2. COSorry Ran, unfortunately excluding Jelly Bean is probably not an option to me now ... :(
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      1. USTony Blues
 

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