There are 49 posts filed in Android Code Tips (this is page 2 of 10).
This is one of my favorite tips and I also consider it a good practice.
How to close any java input or output Stream.
/**
* Closes the specified stream.
*
* @param stream The stream to close.
*/
private static void closeStream(Closeable stream) {
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
Log.e("IO", "Could not close stream", e);
}
}
So, if you’ve got one or more RSS feeds and you want to sort them according to the pubdate, do this:
Collections.sort(myFeedsList, new Comparator<RssItemModel>() {
@Override
public int compare(RssItemModel lhs, RssItemModel rhs) {
SimpleDateFormat formatter = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz");
try {
Date date1 = formatter.parse(rhs.getPubDate());
Date date2 = formatter.parse(lhs.getPubDate());
return date1.compareTo(date2);
} catch (ParseException e) {
e.printStackTrace();
}
return 0;
}
});
Although the majority of the Android powered devices have the Android Market installed, there are a lot of devices that are running Android but haven’t passed the Compatibility Test Suite (CTS) because they do not comply with the Android Compatibility Definition Document (CDD). (more info here). These device may have high quality hardware and software but they haven’t the Android Market installed.
In my personal experience, these devices may lead to a large number of problems.
The easiest way to determine if a device has the Android Market installed (and has passed the CTS) is via the following method:
public static boolean hasMarket(Context ctx) {
Intent market = new Intent(Intent.ACTION_VIEW, Uri.parse("market://search?q=test"));
PackageManager manager = ctx.getPackageManager();
List<ResolveInfo> list = manager.queryIntentActivities(market, 0);
for (ResolveInfo info : list)
{
if (info.activityInfo.packageName.startsWith("com.android."))
return true;
}
return false;
}
You may wonder why we check the package name. The answer is simple: There can be a lot of applications that can handle the “market://” view intent such as SlideMe.
This is a common error and you can solve it following these steps:
Right click on the project and go to “Properties”
Select “Java Build Path” on the left
Open “Source” tab
Click “Add Folder…”
Check “gen” folder and click Ok and Ok again
Again right click on the project and in the “Andriod Tools” click on “Fix Project Properties”