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Android; Check if file exists without creating a new one
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It worked for me:
File file = new File(getApplicationContext().getFilesDir(),"whatever.txt");
if(file.exists()){
//Do something
}
else{
//Nothing
}
share
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Call Activity method from adapter
...ks a lot Mr. Babu. Calling the Activity's methods by this, gives the whole app a 500% kicking performance boost -> I don't need to reload the database in the adapter, which I need to access. I don't care about "years in industry", I'm looking for stable and working solutions and I'm quite sure, I...
Setting unique Constraint with fluent API?
...65%28v=pandp.50%29.aspx?f=255&MSPPError=-2147217396
A quick console app example:
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data.Entity;
namespace EFIndexTest
{
class Program
{
static void Main(string[] args)...
jquery .html() vs .append()
...enever you pass a string of HTML to any of jQuery's methods, this is what happens:
A temporary element is created, let's call it x. x's innerHTML is set to the string of HTML that you've passed. Then jQuery will transfer each of the produced nodes (that is, x's childNodes) over to a newly created d...
Check whether a string is not null and not empty
...d to str.isBlank() which will also test for other Unicode white spaces)
Wrapped in a handy function:
public static boolean empty( final String s ) {
// Null-safe, short-circuit evaluation.
return s == null || s.trim().isEmpty();
}
Becomes:
if( !empty( str ) )
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Android RatingBar change star colors [closed]
...Create your own LayerDrawable XML resources for the RatingBar, pointing to appropriate images to use for the bar. The original styles will point you to the existing resources that you can compare with. Then, adjust your style to use your own LayerDrawable resources, rather than built-in ones.
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Find mouse position relative to element
I want to make a little painting app using canvas. So I need to find the mouse's position on the canvas.
23 Answers
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Example: Communication between Activity and Service using Messaging
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For sending data to a service you can use:
Intent intent = new Intent(getApplicationContext(), YourService.class);
intent.putExtra("SomeData","ItValue");
startService(intent);
And after in service in onStartCommand() get data from intent.
For sending data or event from a service to an applicati...
Log4net does not write the log in the log file
I have created a simple scenario using Log4net, but it seems that my log appenders do not work because the messages are not added to the log file.
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How to make a copy of a file in android?
In my app I want to save a copy of a certain file with a different name (which I get from user)
10 Answers
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