I have a HTML list of about 500 items and a "filter" box above it. I started by using jQuery to filter the list when I typed a letter (timing code added later): $('#filter').keyup( function() { var jqStart = (new Date).getTime(); var search = $(this).val().toLowerCase(); var $list = $('ul.ablist > li'); $list.each( function() { if ( $(this).text().toLowerCase().indexOf(search) === -1 ) $(this).hide(); else $(this).show(); } ); console.log('Time: ' + ((new Date).getTime() - jqStart)); } ); However, there was a couple of seconds delay after typing each letter (particularly the first letter). So I thought it may be slightly quicker if I used plain Javascript (I read recently that jQuery's each function is particularly slow). Here's my JS equivalent: document.getElementById('filter').addEventListener( 'keyup', function () { var jsStart = (new Date).getTime()...
This is indeed done with Intents.
ReplyDeleteFor sharing an image, like in the example picture, it would be something like this:
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("image/jpeg");
share.putExtra(Intent.EXTRA_STREAM,
Uri.parse("file:///sdcard/DCIM/Camera/myPic.jpg"));
startActivity(Intent.createChooser(share, "Share Image"));
For text you would use something like:
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("text/plain");
share.putExtra(Intent.EXTRA_TEXT, "I'm being sent!!");
startActivity(Intent.createChooser(share, "Share Text"));
Yes. You need to provide an Activity with an intent filter that can handle objects of the MIME Type image/jpeg (say, if you wanted to support sharing JPEG images), and and action of presumably ACTION_SEND.
ReplyDeleteMany of the built-in Android apps are open-source, you can check the manifest file of the Messaging app to see what intent filters it is using.