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Sending data back to the Main Activity in Android

I have two activities: main activity and child activity. When I press a button in the main activity, the child activity is launched. ...
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Android get free size of internal/external memory

... size of free memory on internal/external storage of my device programmatically. I'm using this piece of code : 12 Answers ...
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Find out what process registered a global hotkey? (Windows API)

...is compilable in Delphi 2007 with a couple of tweaks. It's a DLL with a call to SetWindowsHookEx that passes through a callback function, which can then intercept key strokes: In this case, it's tinkering with them for fun, changing left cursor to right, etc. A simple app then calls the DLL and re...
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Can table columns with a Foreign Key be NULL?

...d Mar 2 '10 at 21:37 Daniel VassalloDaniel Vassallo 301k6666 gold badges475475 silver badges424424 bronze badges ...
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扩展App Inventor:具有多点触控和手势检测功能 · App Inventor 2 中文网

...RACT MIT App Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor ...
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How to specify an area name in an action link?

... This is a very good tip! But it gives not expected results with MVC 2.. Small correction - Html.ActionLink("home", "Index", new { area = "", controller = "Home" }) – Alexander Beletsky Nov 20 '10 at 10:36 ...
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How do I get the AM/PM value from a DateTime?

... The DateTime should always be internally in the "american" (Gregorian) calendar. So if you do var str = dateTime.ToString(@"yyyy/MM/dd hh:mm:ss tt", new CultureInfo("en-US")); you should get what you want in many less lines. ...
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You need to use a Theme.AppCompat theme (or descendant) with this activity

...a subclass, ActionBarActivity), to Activity, must also change the various calls with "support" to the corresponding call without "support". So, instead of getSupportFragmentManager, call getFragmentManager. share |...
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Interface/enum listing standard mime-type constants

...mons, jax, jboss, javax) for an interface or enum that lists the values of all the standard mime-type (aka content-type). 1...
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How to define a two-dimensional array?

... You're technically trying to index an uninitialized array. You have to first initialize the outer list with lists before adding items; Python calls this "list comprehension". # Creates a list containing 5 lists, each of 8 items, all set t...