A small Android application that satisfies the following minimum requirements:

• has an activity with the text input that allows the user to enter a URL of an image on the internet
• application should download the image, Android service should be used for the downloading
• don't use any 3rd party image loading libraries like Picasso
• once downloaded, store the image on device and display it on screen rotated 180 degrees
• image rotation should be performed on the actual image data

Note

• I used HttpUrlConnection for http request just because it was more simple for this sample app. But I prefer uring third-party applications such as OkkHttp(and Retrofit) or Volley in real application.
• Observable Pattern whitch I use in this sample application is primitive, just because making application more simple. But I prefere Agera in real applications.
• I used SharedPreference for saving data just because making application more simple. we should use db in real app.
• Testing is really basic because I didn't have enough time for that.

TODO

• Use render -script for rotating image
• resolving dick-cache bug
• more test case