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Integrating the ZXing library directly into my Android application
...deEncoder(qrData, null,
Contents.Type.TEXT, BarcodeFormat.QR_CODE.toString(), qrCodeDimention);
try {
Bitmap bitmap = qrCodeEncoder.encodeAsBitmap();
imageView.setImageBitmap(bitmap);
} catch (WriterException e) {
e.printStackTrace();
}
Here is Contents.java
//
// * Copyright...
What is the garbage collector in Java?
...eating new objects, such as Strings and Files, but after a certain time, those objects are not used anymore. For example, take a look at the following code:
for (File f : files) {
String s = f.getName();
}
In the above code, the String s is being created on each iteration of the for loop. Thi...
When is the finalize() method called in Java?
...e readers) it is never called on the main class, as, when the main class closes, no garbage needs to be collected. The OS cleans up everything the app used anyway.
– Mark Jeronimus
May 7 '12 at 7:05
...
What's the difference between a catalog and a schema in a relational database?
...ews and domains of the
Information Schema.
Database Language SQL, (Proposed revised text of DIS 9075), p 45
From the SQL point of view :
A catalog is often synonymous with database. In most SQL dbms, if you query the information_schema views, you'll find that values in the "table_catalog" c...
Java 8 Streams: multiple filters vs. complex condition
...
@Juan Carlos Diaz: no, streams don’t work that way. Read about “lazy evaluation”; intermediate operations don’t do anything, they only alter the outcome of the terminal operation.
– Holger
...
Do HttpClient and HttpClientHandler have to be disposed between requests?
...d System.Net.Http.HttpClientHandler in .NET Framework 4.5 implement IDisposable (via System.Net.Http.HttpMessageInvoker ).
...
What are the most useful Intellij IDEA keyboard shortcuts? [closed]
I did a bit of googling hoping to find a post on IDEA shortcuts similar to Jeff's post on Visual Studio shortcuts ( Visual Studio .NET 2003 and 2005 Keyboard Shortcuts ), but didn't really spot anything that helped. Hopefully the answers to this question will fill the void.
...
C++ Singleton design pattern
...
What irks me most though is the run-time check of the hidden boolean in getInstance() That is an assumption on implementation technique. There need be no assumptions about it being alive. see stackoverflow.com/a/335746/14065 You can force ...
What is the difference between the states selected, checked and activated in Android?
I'd like to know what differs those states. I didn't find any webpage clarifying this.
3 Answers
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How to convert OutputStream to InputStream?
...
An OutputStream is one where you write data to. If some module exposes an OutputStream, the expectation is that there is something reading at the other end.
Something that exposes an InputStream, on the other hand, is indicating that you will need to listen to this stream, and there will b...