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How to check internet access on Android? InetAddress never times out
...ld. As of 2013 it served 130 billion requests a day. Let 's just say, your app would probably not be the talk of the day.
Which permissions are required?
<uses-permission android:name="android.permission.INTERNET" />
Just internet access - surprise ^^ (Btw have you ever thought about, how s...
How to add a button to PreferenceScreen
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There is another solution for customizing the appearance of the preferences.
Design a normal XML layout with buttons or whatever you want to add to the standard preferences. Include a ListView in your layout and give it the ID @android:id/list.
Let's say we call the la...
android View not attached to window manager
...ng the task takes to complete). The solution above works fine, if you're happy to accept a short term memory leak. The recommended approach is to cancel() any running AsyncTask's when the Activity is paused.
– Stevie
May 31 '13 at 13:30
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What is the Swift equivalent of respondsToSelector?
...ift most of the time you can achieve what you need with the ? optional unwrapper operator. This allows you to call a method on an object if and only if the object exists (not nil) and the method is implemented.
In the case where you still need respondsToSelector:, it is still there as part of the N...
How to use NSURLConnection to connect with SSL for an untrusted cert?
... open source (BSD license) library called ASIHTTPRequest that provides a wrapper around the lower-level CFNetwork APIs. They recently introduced the ability to allow HTTPS connections using self-signed or untrusted certificates with the -setValidatesSecureCertificate: API. If you don't want to pull ...
How do I add a Fragment to an Activity with a programmatically created content view
..., and that view must have a custom id. Using the default id will crash the app. Here's the updated code:
public class DebugExampleTwo extends Activity {
private static final int CONTENT_VIEW_ID = 10101010;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.on...
Why can't I use Docker CMD multiple times to run multiple services?
..., i think use supervisor is better.but why docker only run one CMD?what happen inside?
– edwardsbean
May 17 '14 at 2:38
1
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How much overhead does SSL impose?
...hard-and-fast answer, but is there a generic order-of-magnitude estimate approximation for the encryption overhead of SSL versus unencrypted socket communication? I'm talking only about the comm processing and wire time, not counting application-level processing.
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What is Normalisation (or Normalization)?
...ll is that it is tricky to update, tricky to query against, and you cannot apply indexes, constraints and so on.
(2) Having redundant non-key data (ie. data repeated unnecessarily in several rows). Example:
UserId | UserName | Car
-----------------------
1 | John | Toyota
2 | Sue ...
Textarea onchange detection
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This is the best approach. I don't like the inferences here (browser support for addEventListener does not imply support for the input event, or vice versa); feature detection would be better. See this blog post for a discussion of this.
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