AndroidUtils | 各种各样的Android或Java的实用代码片段，方便总结与查找

I'm using butterknife and fragments. I can't switch to other page in login controls.

I am currently developing an Android application and I have a mysterious problem on Android 8 to 9. When I restart my phone, I receive an alert message to warn me of the failure of the application (mainly by the service started during Boot_Completed), but the services of the application are still functional. By my stack trace, I can say that the problem comes from the broadcast receiver that launches any other service.

Unfortunately, I was unable to find a fix to that issue.

Below, you can see my broadcast receiver.

I have set up a AWS SNS system to send notifications to all endpoints that have subscribed to a topic following this tutorial here (I have set up a Firebase Cloud Messenger not GCM):

https://docs.aws.amazon.com/mobile/sdkforxamarin/developerguide/sns.html

Everything works as expected when the app is running. I can send a message through the AWS SNS console and I will receive the notification on my endpoint (physical device and emulator) however when the app is closed and I try to send the same JSON data from the AWS SNS console I only see the Title in the notification. The JSON data that I am sending is:

{ "default": "Testing", "sqs": "Testing", "GCM": "{ \"notification\": { \"message\": \"Testing\" } }" }

I have a PCL Xamarin Forms project with the following code to handle the notification when the notification is received from Firebase:

I have a WhatsApp like chat in my application and recently they added a new functionality that groups images in albums if they are sent in a sequence of 4 or more pictures and there aren't messages between them. Like in the picture below:

So I have implemented my RecyclerView adapter that displays all the contents separately which means that whether it's a message, an image, an audio, etc, each one of them would be in a separated row in my adapter. So I would like to do what WhatsApp did and implement this grouping of images into albums if there are more than 4 sent in a row. How can I achieve this?

I have successfully implemented the getItemViewType() method in my adapter and it's working fine. But I don't know what to do now.

PS: Feed is my object that can be either a text message, an image, and audio file, etc. So mItems is a List of Feed.

This is my Adapter:

I have one Activity (1) that has two fragments. This Activity extends to another one (2) with base methods that I commonly use in my application. So I want to call a method from (2) after I click on one button that is located in one of the fragments from (1), what is the best way to do this?

I am trying to do it like this:

While selecting image using the inbuilt CropImageActivity, the picker shows option to select files (of any type) from some external app (WPS Office for my case). So when I select a pdf file (say), onSetImageUriComplete() doesn't cause any error.

I'm currently developing an email application with a background service used in conjunction with the JavaMail Idle functionality. The background service keeps the idle functionality working by issuing a check every 10 minutes (as the server being used (Exchange server)) can sometimes drop the connection anywhere between 10 and 30 minutes of being connected.

Whilst this is currently working great and the idle/push functionality works great, occasionally the below exception is thrown: