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POIssue with member variable of an activity when using back button
 

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  1. POIssue with member variable of an activity when using back button
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    <p>I've got an activity that shows some item from a list.</p> <p>When swiping from right to left the same activity is started with the next product and when swiping from left to right I start the same activity with the previous product.</p> <p>I get the product position from a global array using a member variable <code>position</code> that I decrement when going to previous product and increment when going to next product, and that I pass as an extra in the intent. </p> <p>The issue is that when pressing the back button, the <code>position</code> value remains the same as that in the activity where I'm coming from. I understand that onResume is called instead of onCreate and that no extra is passed, but <code>position</code> is not static and I expect it to keep its value in the activity instance. Why is this not the case?</p> <p>Thanks</p> <pre><code>public class ProductHome extends Activity{ private int position; private Product product; private GestureDetector gestureDetector; View.OnTouchListener gestureListener; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.product_home); position = getIntent().getIntExtra("Position", -1); product = GlobalData.map_products.get(product_id); // swipe detector // left -&gt; right: position++ // right -&gt; left: position-- // then starts same activity again gestureDetector = new GestureDetector(new SRPGestureDetector()); gestureListener = new View.OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { if (gestureDetector.onTouchEvent(event)) { return true; } else{ return false; } } }; RelativeLayout product_home = (RelativeLayout) findViewById(R.id.product_home); product_home.setOnTouchListener(gestureListener); } } </code></pre>
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