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Why java.lang.Object is not abstract? [duplicate]

... this doesn't stand up - an empty subclass could have been provided in the SDK (java.lang.Lock or whatever), which could be constructed any time we wanted to synchronise. Doing this would have the added benefit of creating a stronger statement of intent. Are there any other factors which could have...
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Android activity life cycle - what are all these methods for?

...tePresentationDisplayChanged() is very much a function from inside Android SDK – Nilesh Pawar Apr 29 '13 at 18:45 12 ...
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How to detect iPhone 5 (widescreen devices)?

... Tested and designed for any combination of SDK and OS: Swift Added iPad types. iPad 2 and iPad mini are non-retina iPads. While iPad Mini 2 & above, iPad 3, 4, iPad Air, Air 2, Air 3, and iPad Pro 9.7 have same logical resolution of 1024. iPad Pro has maxLength ...
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What's the best way of structuring data on firebase?

... how do we create this structure from Swift or anywhere using the Firebase SDK? Also how can we validate that the new data added to the applications node actually exists In the applications list using the Firebase validation rules? – Tommie C. Nov 20 '16 at 20:...
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How do I do base64 encoding on iOS?

... encoding and decoding, but I could not find any support from the iPhone SDK . How can I do base64 encoding and decoding with or without a library? ...
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When to call activity context OR application context?

... I think there's a lot of stuff that is poorly documented on the SDK site, this is one of them. The claim I'm going to make is that it seems as though it's better to default to using an application context and only use an activity context when you really need to. The only place where I've ...
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How to create your own library for Android development to be used in every program you write?

...reating Android libraries. Give your library a name and select a minimum SDK version for the code in the library, then click Finish. Once the Gradle project sync completes, the library module appears in the Project panel on the left. If you don't see the new module folder, make sure it...
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How to save an activity state using save instance state?

I've been working on the Android SDK platform, and it is a little unclear how to save an application's state. So given this minor re-tooling of the 'Hello, Android' example: ...
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Meaning of Choreographer messages in Logcat [duplicate]

I installed the latest versions of SDK (API 16) and got the latest ADT. I'm now seeing these messages in the logcat, that I'm quite sure, I haven't seen before. Does anyone have an idea about this? ...
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Symbolicating iPhone App Crash Reports

... the file. You can find steps on how to do the symbolication here: iPhone SDK : Where is symbolicatecrash.sh located? – Sam Dec 27 '11 at 19:28 3 ...