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No starter code is provided. Creating the app is a prerequisite. Adding images to the list items So far you have created an adapter ItemAdapter to display affirmation strings in a RecyclerView.
Download the images To start, open up the Affirmations app project in Android Studio from the previous codelab. If you don't have this project, go through the steps in the previous codelab to create that project. Then return here. Next download the image files onto your computer. There should be ten images, one for each affirmation in your app. The files should be named from image1.
Once these resources have been added to your app, you will be able to access these images from your code using their resource IDs, such as R. You may have to rebuild your code for Android Studio to find the image.
Now the images are ready to use in the app. Add support for images in the Affirmation class In this step, you'll add a property in the Affirmation data class to hold a value for an image resource ID. Open the Affirmation. Modify the constructor of the Affirmation class by adding another Int parameter named imageResourceId.
Add the StringRes annotation to stringResourceId. Add the DrawableRes annotation to imageResourceId. Make sure the imports androidx. DrawableRes and androidx. StringRes are added at the top of your file after the package declaration. DrawableRes import androidx. Open Datasource. You should see an error for each instantiation of Affirmation. For each Affirmation , add the resource ID of an image as an argument, such as R.
R import com. Add a LinearLayout around the existing TextView and set the orientation property to vertical. Move the xmlns schema declaration line from the TextView element to the LinearLayout element to get rid of the error. Depending on screen size, this value should show a few cards on screen at any given time. InputStream; import java. URL; import java. URLConnection; import java. HashSet; import java. The URL is probably not pointing to a file". What about the onPictureTaken callback which gives the picture as byte[], can one get a URL to that picture, straight from the camera?
Or is basic old outputStream the only way in Android to save a picture which was taken by a camera without using the built in intent? That seems strange, because the natural thing to do after onPictureTaken is of course to save it. Is there no particular support for doing that? Tombola Hi! This post is about downloading a picture from the web. But to answer your question as far as I've understood it : the common way of saving a camera picture is getting its path from the Cursor in the onActivityResult method , then creating a Bitmap using that path.
BartBurg this question is about downloading and saving an image. But you're right at some point, since there's a write method, there also should be a read method for the sake of completeness. I will add it in the next update to this post soon. Can you please provide an example using this BasicImageDownloader? JaydevKalivarapu please check the demo app on GitHub source class containing example — Droidman. Show 2 more comments.
JPEG, 90, out ; out. Venkat Kotra 9, 3 3 gold badges 42 42 silver badges 49 49 bronze badges. Nasz Njoka Sr. Note : while this example could generally work, it does not provide any error handling and also lacks some basic understanding of AsyncTask 's advantages proper use of parametrization, parallel execution..
Please refer to my examples below for details. Yes Droidman, I agree with you. This piece of code should be taken as a tamplate and one has to complete it on his own, including error handling. By the way, your code lacks error handling too. What will happened to your connection and streams in case of IOException? Androider please take a closer look at my download method, particularly the doInBackground method of the task that I use.
An IOException would land in the catch Throwable e block, resulting in an ImageError being returned and the onError callback being triggered.
The ImageError object will contain the original stack trace and the cause of the occurred Exception — Droidman. Yes, but your connection will not be disconnected and your streams will not be closed — Androider. Androider ah, I see your point. Though I never noticed any suspicious leaks on my test devices, this behavior might be different on other devices. Thanks for the hint - I have updated the code — Droidman.
Show 1 more comment. Share 0. Tweet 0. Pin it 0. Up next. Tags asynctask Share article The post has been shared by 0 people. Facebook 0. The good news is that this is all we really need to create our gallery — a RecyclerView filled with images. The bad news is that the RecyclerView is a little more complicated than most other views. Because of course it is. RecyclerView is not, for starters, available to drag and drop using the design view.
This means we also need to modify our build. Just add this line to the app level file:. Fortunately, Android Studio is pretty smart about prompting you to do all this. I just got a new computer, so I can play along with you! Head back to the XML and it should now be working just fine. What we need to do, is load our images into here. As mentioned, populating our recycler view is a little more complicated than using a regular list.
This looks like so:. Go for it — make your own MyAdapter. Java and then switch back.
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