If we are known about how long the operation will take to complete, then we can use the determinate form of the indicator. In case if we are not aware of how long the operation will run then we can use the indeterminate form of indicator.
Following is the pictorial representation of using a different type of android progress indicators determinate and indeterminate to show the progress of current operation in notification. Generally, the progress indicators in android are implemented by using the ProgressBar class. To display the progress indicators in our app, we need to add the progress bar to our notification by calling setProgress max, progress, false method and then issue the notification.
Here the third argument in setProgress method is used to indicate whether the progress bar is determinate false or indeterminate true. As our operation proceeds, we need to increase the value of progress and update the status of notification.
At the end of operation, the progress value must be equal to max value. To know more read our comments policy. Most Voted Newest Oldest. Inline Feedbacks. Sep 27, PM. Reply to shiva Sep 27, PM. Chintan Rathod. We will show the progress of the download in the notification task. In our previous tutorial , we built an android application which we download a file using Retrofit and show the progress in the ProgressBar.
In order to build the app which downloads in the background and shows and updates the download progress in the Notification we need to do the following things:. In the above code, we start the BackgroundNotificationService. Before that, we check for the Runtime Permissions. When the download would get completed it would send a message to the BroadcastReceiver via Intents. Once the download is successfully completed we retrieve the saved file from the Internal Storage and display it in the ImageView using Picasso.
Inside the onHandleIntent we create the Notification first and then Retrofit instance. At the end of the operation, progress should equal max. A common way to call setProgress is to set max to and then increment progress as a "percent complete" value for the operation. You can either leave the progress bar showing when the operation is done, or remove it. In either case, remember to update the notification text to show that the operation is complete.
To remove the progress bar, call setProgress 0, 0, false. For example:. The resulting notifications are shown in figure 1. On the left side is a snapshot of the notification during the operation; on the right side is a snapshot of it after the operation has finished.
To display a continuing indeterminate activity indicator, add it to your notification with setProgress 0, 0, true and issue the notification. The first two arguments are ignored, and the third argument declares that the indicator is indeterminate. The result is an indicator that has the same style as a progress bar, except that its animation is ongoing.
Issue the notification at the beginning of the operation. The animation will run until you modify your notification. When the operation is done, call setProgress 0, 0, false and then update the notification to remove the activity indicator. Always do this; otherwise, the animation will run even when the operation is complete. Also remember to change the notification text to indicate that the operation is complete. To see how continuing activity indicators work, refer to the preceding snippet.
Locate the following lines:. Replace the lines you've found with the following lines.
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