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    <p>Apart from the options below (and the other options, such as Web storage - discussed <a href="http://developer.android.com/guide/topics/data/data-storage.html" rel="nofollow noreferrer">here</a>, or <a href="http://developer.android.com/reference/java/io/Serializable.html" rel="nofollow noreferrer">JSON options</a>), there is no way to send data from one <code>Activity</code> to another. You should either reconsider how you are doing what you are trying to do, or consider using a different <code>Driver</code>. </p> <p>If the code is open source or open licensed, you may consider hacking in <code>Serializable</code> or <code>Parcelable</code> by extracting the source and modifying it to fit your needs. More on decompiling <code>Android</code> source is available <a href="https://stackoverflow.com/questions/1249973/decompiling-dex-into-java-sourcecode">here</a>.</p> <h3>There are several methods you can use for sharing content between two Activities in different projects:</h3> <p><strong>1.</strong> <code>SharedPreferences</code>, <code>SQLite</code>, <code>Serialization</code>, or <code>Content Providers</code>. These will all require you to break down your <em>Driver</em> Object into simple types. More on storage can be found in the <a href="http://developer.android.com/guide/topics/data/data-storage.html" rel="nofollow noreferrer">docs</a>.</p> <hr> <p><strong>2.</strong> <code>Parcelable</code>s can be shared via <code>Intent</code> between Activities.</p> <h3>There are several methods you can use for sharing content between two Activities in the same project:</h3> <p><strong>1.</strong> You can use <code>SharedPreferences</code>, <code>SQLite</code>, or <code>Serialization</code>. More on storage can be found in the <a href="http://developer.android.com/guide/topics/data/data-storage.html" rel="nofollow noreferrer">docs</a>.</p> <hr> <p><strong>2.</strong> You can set it to a static variable. For example, have a <code>Store</code> class where you save static variables:</p> <pre><code>public class Store { /** provides static reference to the driver */ public static Object driver; } </code></pre> <p>Then to set from anywhere, just do:</p> <pre><code>Store.driver = myDriver; </code></pre> <p>and to get from anywhere, just do:</p> <pre><code>Object driver = Store.driver; </code></pre> <hr> <p><strong>3.</strong> Create a custom <code>Application</code> class and set this in your Android Manifest. This application can store the driver, and doesn't necessarily have to be static. More on this can be found at <a href="https://stackoverflow.com/questions/4572338/extending-application-to-share-variables-globally">Extending Application to share variables globally</a>.</p> <hr> <p><strong>4.</strong> The third option is to create a singleton accessor to your <code>Activity</code>. So, in your activity that has the driver referenced, add the following class variable:</p> <pre><code>private static MyActivity self;//replace MyActivity with the name of your class. </code></pre> <p>Then, add the getter:</p> <pre><code>public static MyActivity sharedMyActivity() { return self; } </code></pre> <p>Finally, add this line in <code>onCreate</code> (after the call to <code>super.onCreate(...)</code>):</p> <pre><code>self = this; </code></pre> <p>Now to access your driver (we'll say it has a getter), just call this from anywhere:</p> <pre><code>Object driver = MyActivity.sharedMyActivity().getDriver(); </code></pre> <hr> <p>As for <strong>part two of your question</strong> - if you are attempting to read from and write to a hardware device in an <code>Activity</code> that does not provide <code>USB</code> permissions, this will not work.</p>
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    1. POAndroid: pass object without serialization
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    1. COThanks for the suggestions, but don't those all require the activities to all be within the same application? In my case, that's not an option.
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    2. CO@ryan0270, yes, My mistake. I have updated my post to include both cases, and discuss your options, as well as part 2 of your question at the bottom.
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