Java code for downloading using piccasa library android

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Electron Picasa. Updated Oct 21, CSS. Open the manifest. In the first line, we are getting the ImageView instance from the layout. Java import androidx. AppCompatActivity; import android. Bundle; import android. ImageView; import com. More Functionalities of the Picasso Library For any real-time application, we must think of all possible cases.

In the above code, we just download the image from the server link. But how to display that image in the app.

How to resize it and what if the image loading failed? We need to have another image showing an error message that image loading failed. This all matters for an app developer. The following code changes are made in the MainActivity.

The placeholder image is shown immediately and replaced by the remote image when Picasso has finished fetching it. Picasso will try to download the remote image three times and display the error placeholder image if it was unable to fetch the remote asset. The error image will be shown, in this case when there is no internet connectivity for the application. Instead of loading the image from the URL, the Picasso library shows the error image.

Note: To see this result uninstall the previously loaded application and then install the fresh version of the application from the Android Studio.

Because anonymous classes are eligible for garbage collection when there are no more references, the network request to fetch the image may finish after this anonymous class has already been reclaimed.

See this Stack Overflow discussion for more details. In other words, you are not allowed to do Picasso. We can use this custom Target approach to create a staggered image view using RecyclerView. We can then set the ratio before the image has loaded if we already know the height:width ratio using onBindViewHolder as shown below:. Alternatively, we can set the ratio after the bitmap has loaded if we don't know that ratio ahead of time. To avoid using an anonymous class, we will implement the Target interface on the ViewHolder class itself for RecyclerView.

When the callback is fired, we will calculate and update the image aspect ratio:. You can also use this third-party library for other transformations, such as blur, crop, color, and mask. Jump to Section. Edit Page Page History. Usage Displaying images is easiest using a third party library such as Picasso from Square which will download and cache remote images and abstract the complexity behind an easy to use DSL. Before Using Picasso , do not forget to add internet permission in the manifest file.

For example, we can do a center cropping with: Picasso. By passing 0, the correct height is automatically calculated. If not, resize those static images and save them back to your project.

Loading Errors If you experience errors loading images, you can attach a listener to the Builder object to print the stack trace.