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()...
Consider using scale for ImageView, and don't bother about resizing. You can scale an image like this, for example:
ReplyDeleteimage.setAdjustViewBounds(true);
image.setMaxHeight(50);
image.setMaxWidth(50);
image.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
The bigger the image, the bigger the size, I wouldn't think performance would really be affected but keep things efficient.
ReplyDeleteYou could also place different size images in the different folders for different resolutions:
res/drawable-mdpi/my_icon.png // bitmap for medium density
res/drawable-hdpi/my_icon.png // bitmap for high density
res/drawable-xhdpi/my_icon.png // bitmap for extra high density
Supporting different size screens
we can resize the existing bitmap to any size using bitmap.createScaledBitmap use the below code.
ReplyDeletebmp=Bitmap.createScaledBitmap(bmp,destBitmapWith, destBitmapHeight,true);