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How to force an entire layout View refresh?
...wer the question: Use invalidate():
public void invalidate ()
Since: API Level 1
Invalidate the whole view. If the view is visible, onDraw(Canvas) will be called at some point in the future. This must be called from a UI thread. To call from a non-UI thread, call postInvalidate().
ViewG...
Download JSON object as a file from browser
...
You could try using:
the native JavaScript API's Blob constructor and
the FileSaver.js saveAs() method
No need to deal with any HTML elements at all.
var data = {
key: 'value'
};
var fileName = 'myData.json';
// Create a blob of the data
var fileToSave = ...
Set selected radio from radio group with a value
...p]").val([5]);
Here is the jQuery doc that explains how it works: http://api.jquery.com/val/#val-value
And .val([...]) also works with form elements like <input type="checkbox">, <input type="radio">, and <option>s inside of a <select>.
The inputs and the options havi...
Stop/Close webcam which is opened by navigator.getUserMedia
...
EDIT
Since this answer has been originally posted the browser API has changed.
.stop() is no longer available on the stream that gets passed to the callback.
The developer will have to access the tracks that make up the stream (audio or video) and stop each of them individually.
More i...
Convert InputStream to BufferedReader
...
StandardCharsets don't work on API Level >19. @brcolow
– Florida
Aug 15 '15 at 21:21
1
...
Explaining Apache ZooKeeper
...present, but can be written above the ZooKeeper primitives.
If the C/Java API is too unwieldy for your purposes, you should rely on libraries built on ZooKeeper such as cages and especially curator.
Where to read more
Official documentation apart, which is pretty good, I suggest to read Chapter 1...
plot a circle with pyplot
...nates are, you could use the scatter() method. http://matplotlib.org/1.3.1/api/pyplot_api.html#matplotlib.pyplot.scatter
import matplotlib.pyplot as plt
x = [1, 2, 3, 4, 5]
y = [10, 20, 30, 40, 50]
r = [100, 80, 60, 40, 20] # in points, not data units
fig, ax = plt.subplots(1, 1)
ax.scatter(x, ...
Android DialogFragment vs Dialog
...t we use DialogFragment instead of a simple Dialog by using Fragments API , but it is absurd to use an isolated DialogFragment for a simple Yes-No confirmation message box. What is the best practice in this case?
...
How can I check file size in Python?
... StringIO's, in my limited testing. (Python 2.7.3.) The "file-like object" API isn't really a rigorous interface, of course, but the API documentation suggests that file-like objects should support seek() and tell().
Edit
Another difference between this and os.stat() is that you can stat() a file ...
How to get the previous URL in JavaScript?
...o the previous page without knowing the url, you could use the new History api.
history.back(); //Go to the previous page
history.forward(); //Go to the next page in the stack
history.go(index); //Where index could be 1, -1, 56, etc.
But you can't manipulate the content of the history stack on br...