I have a list of image URLs and have to show them and change them automatically in ImageView and need to count how many times every image appears to the user.
What could be the best approach to do this? can we avoid handlers here?
Android provides views which can be used to display images from various sources and provide transitions between them. Some of these views are the ImageView and the ImageSwitcher. These views provide a high level of functionality to display images in a user interface so that we can concentrate on the images we want to display rather than taking care of rendering.
You can get complete guide setup in links description.
In description there is a complete explaination for changing image using ImageSwitcher
by pressing a button, But by updating the code to change after certain can be done easily.
Link to tutorial:
https://www.sitepoint.com/handling-displaying-images-android/
A github link for application used with image switching button:## Heading ##
https://github.com/Adarshgkp04/Android_Image_transitions.git
Feel free to ask queries.
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I know how to setup a listview to have an image and some text on each rows.
I know how to have the user open up a dialogue to pick an image from the file system or live.
I almost know how to downsample it in case its huge. (too many ways, no expert to recommend one).
I really need to know how the user can create db entries (notes) that contain text and an image that is user selected. In essence, the user is entering text and selecting/uploading an image that makes a 'note' and the notes get displayed in a listview.
I don't want the full code, but rather a general direction. I did some research and for me its a big forest. If you can give general directions how thats done, I'll do the rest.
Thank you,
I have used Picasso in my Android Application which has many images. Its working and looking good. I am trying to make UI more of simple and user friendly. I have placeholder for my imageviews before actual image loads. But its white color. I want to placeholder image depending on main color of image like pinterest.
Pinterest placeholder images before main image loads. Following screenshot:
And after image loads it shows proper image based on main background color shown for placeholder:
Is it possible to achieve in Picasso library provided by Square or whats the way to achieve.
Please help.
Bit late but for other readers that want to accomplish a similar thing, I'll just leave this here. I don't know how Pinterest did/does it, probably developed their own implementation. But Google updated the v7 support library with 'Palette' which is a new API which allows you to extract prominent colours from images when provided with an Image Bitmap.
Edit: Something I just realised that this probably doesn't help for placeholders since you need an image to actually get colours from! So my best guess is that Pinterest does the colour extraction from the server and includes the colour in the (presumably) JSON response that is sent to the client.
I haven't used it much myself but it works quite well from what I've seen/read. You can read up more about it at these two places:
Developer Docs
Tutorial/Explanation (Willow Tree Apps)
You can only do that by saving the prominent color from the image while saving it in your database & then retrieving it for later use.
https://pypi.org/project/extcolors/ is a very easy to use python library that extracts the colors for you given an image.
Or you could you https://github.com/woltapp/blurhash a library that'll give you this.
Both ways, you'll have to first save the BlurHash or The color as a metadata in your database, and then when the user requests the data, you'll send either of those and display them till the data is fully downloaded.
I need help to do the following task. My task is similar to Pose (an Android application). In this application they done a amazing concept. Once you capture the image, then tap any part of the image it shows number of options to add tagline. Once you add the tag means the particular tag is added over the image. once you upload the image to server, now you can view in your profile, once you touch on the image, the tag parts are visible, then you again touch the image means the tagged icons are disappeared. How they do this think, if they are using any third party tool?.Here for your reference i added the market link of Pose application also having a video and Sample images and i also added some images kindly notice it. Kindly share you valuable suggestion to completed this task.
You can use a FrameLayout and try to position the tags over the image that way, however I would probably make a custom View, override the onDraw method and do custom drawing for all of this.
I'm working on an application in which I need to download lots of images. The images are to be seen in the fullscreen mode. Therefore, I wanted to know how to load an image, speedily, to make the application more responsive and enhance user experience. I would like to, atleast, show a blurred image first and than make it sharp. Thanks.
use BitmapFactory.Options.inSamleSize to load a downsampled version of the image. Then load the bigger image and do a fade transition using a TransitionDrawable
You're looking for "progressive image rendering", which can be done in a variety of different image formats, including png, jpeg, gif, etc. The next time you're going to save an image in a good graphics program, select one of those formats and take a look at your save options. You should have an option to save an "interlaced" image.
Jeff Atwood of Coding Horror has a nice write up here: http://www.codinghorror.com/blog/2005/12/progressive-image-rendering.html
I have my app working where it comes to a screen with 6 thumbnails. The user will select one and the next screen is a full image. I've accomplished this through an OnClickListener to call a new activity/xml (I'm new at this, sorry if my terminology is a little off).
My question is: is there a way to avoid creating 6 activty/xml (one for each thumbnail)? ultimately, my app will have about 40 thumbnails that can be selected for full screen view.
I've been trying to follow examples online where it appears that the code is presenting the full image within java instead of referencing an xml file. I've also seen use of Bitmap and BitmapFactory. Is this the way to go?
If the full screen image can be created dynamically within java, will the Back button still work to the user back to the screen with 6 thumbnails?
thanks, J
The simplest approach to take is to pass a reference to the image in the intent you use to launch the full-screen activity.
You can use the BitmapFactory to create a Bitmap, and then update the ImageView (or however you're displaying the image) from the loaded bitmap.
Using this approach, the back button will still work normally, but you'll only need one activity to display the full-screen image.