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app-release-unsigned.apk is not signed

...ettings. Go to Signing Tab. Add a signing config and fill in information. Select your keychain as well. Go to Build Type tab. Select release mode and set: -Debuggable to true. -Signing Config to the config. (The one you just created). Sync your gradle. Enjoy! ...
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Making a UITableView scroll when text field is selected

... defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil]; // Register notification when the keyboard will b...
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On localhost, how do I pick a free port number?

... Bind the socket to port 0. A random free port from 1024 to 65535 will be selected. You may retrieve the selected port with getsockname() right after bind(). share | improve this answer | ...
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How to use if-else option in JSTL

...prefix="c" uri="http://www.springframework.org/tags/form"%> and <c:select> <option value="RCV" ${records[0].getDirection() == 'RCV' ? 'selected="true"' : ''}> <spring:message code="dropdown.Incoming" text="dropdown.Incoming" /> ...
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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?

...', '2014-08-20 18:47:42'); Query OK, 2 rows affected (0.04 sec) mysql> SELECT * FROM test; +----+------+---------------------+ | id | data | ts | +----+------+---------------------+ | 1 | New | 2014-08-20 18:47:42 | +----+------+---------------------+ 1 row in set (0.00 sec) ...
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Xcode/Simulator: How to run older iOS version?

...e simulator from 3.2 onwards after upgrading. In the iPhone Simulator try selecting Hardware -> Version -> 3.2 share | improve this answer | follow | ...
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How to delete a module in Android Studio

...ed via "File -> Project Structure" or by right-clicking on a Module and selecting "Module Settings". Then select the module, and click the "minus" button to remove it. The directory will still be visible in the "Project" view (though not in the "Android" view) since it's not actually delete...
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d3 axis labeling

...e charts. You are given the building blocks, an axis component, data join, selection and SVG. It's your job to put them together to form a chart! If you want a conventional chart, i.e. a pair of axes, axis labels, a chart title and a plot area, why not have a look at d3fc? it is an open source set ...
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What is the difference between properties and attributes in HTML?

...in only one kind of value in the DOM, while some attributes (e.g. checked, selected) to retain two values; that is, the value "when it was loaded" and the value of the "dynamic state". (Isn't the DOM supposed to be to represent the state of the document to its full extent?) It is absolutely essenti...
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How can I make the Android emulator show the soft keyboard?

... time I try to do it, it resets itself! I click New... Hardware property, select Keyboard Support, change the value to 'no', click edit/create, but when I edit it again or get info: Hardware Keyboard = yes! Ha! I can't express how sublime I find the Android emulator. – blahd...