Android Findings

onConfigurationChanged - orientation change
Having "android:configChanges="orientation|keyboard" in manifest reloads the android activity on orientation change.
Instead the correct property is

"android:configChanges="orientation|keyboardHidden".

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addJavascriptInterface - webview & javascript
When passing argument from javascript to android, pass it as string. Now if you want to convert the passed string to Integer or Long, the do not use Integer.getInteger instead use Integer.valueOf, that is, use valueOf.

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Java Math.ceil with Integers
If your try to do some thing like

Integer a=1;
Integer b=5;
Integer c=0;
c=(int)Math.ceil(a/b);
You will get only 0;

Instead do something like

Integer a=1;
Integer b=5;
Integer c=0;
c=(int)Math.ceil((a * 1.0)/b);
So that you will get 1.

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cursor.close() - Right place to close the sqlite cursor
Don't

if(cursor.getCount() > 0)
{
 cursor.close();
}

Do

if(cursor.getCount() > 0)
{

}
cursor.close();

Reference:https://groups.google.com/group/android-developers/browse_thread/thread/706258dfb7cbee1d

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