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    <p>Hard to say what is wrong without seeing the code, but I would advise you to use the Intent extras to move your data between activities. You will need to make your Vehicle class implement <a href="http://developer.android.com/reference/android/os/Parcelable.html" rel="nofollow">Parcelable</a> (there is an example of how to implement Parcelable on that page, and countless others on the net). You pass your object as extra to the intent launching your UpgradeActivity like this :</p> <pre><code>Intent upgradeIntent = new Intent(this, UpgradeActivity.class); upgradeIntent.putExtra("com.example.model.Vehicle", yourVehicleObject); startActivityForResult(upgradeIntent, UPGRADE_CAR_REQUEST_CODE); //UPGRADE_CAR_REQUEST_CODE is a unique private static final int </code></pre> <p>Then you can retrieve it in your UpgradeActivity onCreate method :</p> <pre><code>Intent intent = getIntent(); Vehicle vehicleFromLastActivity = intent.getParcelableExtra("com.example.model.Vehicle"); </code></pre> <p>Before going back to your MainActivity you do something like this :</p> <pre><code>Intent dataIntent = new Intent(); dataIntent.putExtra("com.example.model.Vehicle", yourModifiedVehicleObject); setResult(RESULT_OK, dataIntent); finish(); </code></pre> <p>Then finally in MainActivity you need to handle the result, it is done like this :</p> <pre><code>@Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); switch(requestCode) { case UPGRADE_CAR_REQUEST_CODE: if(resultCode == android.app.Activity.RESULT_OK) { Vehicle modifiedObject = data.getParcelableExtra("com.example.model.Vehicle"); // Now you can use that object which is coming from UpgradeActivity } } } </code></pre> <p>Of course this could cause issues if your Vehicle class takes a lot of memory. You could then consider passing only the relevant information through the Intent to rebuild the object in the UpgradeVehicle Activity, for example only the id &amp; name.</p>
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    1. POAccessing an Instance's Variable from another Activity - Android Developement
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    1. COSo after changing the level of the vehicleFromLast activity i pass it back using the same method? And then i make the Vehicle in main equal to the new vehicle i passed back in?
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    2. COMy apologies, my answer could have been better. I edited to use startActivityForResult, which allows to retrieve an object from the UpgradeActivity when it is done with it. Let me know if you need more details ;)
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    3. COIll try all of that and get back to you :) Thank you
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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