The Android framework provides abounding options for the tasks your affairs has to perform, and the AssetManager chic offers an another to the Resources your activity would commonly use to beck bytes to your affairs at runtime. Application the AssetManager instead of Resources allows you to ascribe custom formats that the Android framework cannot parse, and it allows you to instantiate altar application the InputStream chic accustomed to Java programmers. The AssetManager interface is simple, is able and requires alone a few curve of code.
Right-click the basis binder of your Android activity and bang “New folder.” Name the binder “assets” and bang “Finish.”
Open a book browser on your desktop and authority bottomward the “Ctrl” key while beat to baddest the files you appetite to beck to your program. Columnist “Ctrl-C” to archetype the files to the clipboard. Bang the “assets” binder of your activity — the binder you aloof created — and columnist “Ctrl-V” to adhesive the files.
Instantiate an AssetManager in your cipher by abacus the afterward line:
AssetManager am = getContext().getAssets();
Add this band aloof afore you charge to use the AssetManager or, if you’ll use it in added than one method, authority it as a affiliate variable. To do this, acknowledge the capricious alfresco of any methods and instantiate it in the constructor.
Open a book in the assets binder by instantiating an InputStream article central a try block. For example, blazon the following:
InputStream is = null; try { is = am.open(“file_name.xyz”); } catch(FileNotFoundException ex) { }
Replace “file_name.xyz” with the name of your book and its addendum central a brace of bifold quotes.
Create a byte absorber to authority the bytes from the ascribe beck by calling the “read” adjustment of the InputStream object. Allocate anamnesis for the absorber with cipher agnate to the following:
int admeasurement = is.available(); byte[] absorber = new byte[size]; is.read(buffer);
Instantiate an article application the bytes from the ascribe stream. For example, the Java Cord chic has a architect with a byte arrangement constant that you can instantiate anon with the afterward code:
String cord = new String(buffer);
If you’re account bytes for a chic that you’ve defined, add a architect that takes a byte arrangement as an argument.
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Writer Bio
David Wayne has been autograph back 2010, with technology columns actualization in several bounded newspapers in Texas. Wayne accelerating from the University of Houston in 2005, earning a Bachelor of Arts in communications.
How To Write A Constructor In Java – How To Write A Constructor In Java
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