On the night of December 26th 2020 I photographed the Moon 12 days after the new moon, then a crescent moon just some days before the full moon phase.
A few days before the opposition of Mars, I got these four images between 20:15 UT and 21:25 UT on 13 October 2020.
This photo is one of the first photos taken with the new telescope on October 9, 2020 at 22:21 UT.
In the last 4 years I have not used this blog but now I want to resume publishing the photos taken with my new telescope.
Astronomy has been a my hobby since I was a child, unfortunately I had to stop for many years and now I would like to start observing the sky again.
On this page you can find my current setup.
You can save and read files in the internal storage as private files which only your app can see except for other apps with root privileges.
The intensive use of many images in an app can create difficulties to the responsiveness and to memory, shown by warnings like ANR (Application Not Responding) or errors like OutOfMemoryError.
There isn’t a class that extends List for which you can set a limit on its size and that it behaves like a Queue object if you add an item beyond its fixed size.
In Android in order to avoid to do too work in the main thread, most of the operations should be carried out in a secondary thread or a class that extends AsyncTask; then the final results are reported in some view to be shown to the user using Activity.runOnUiThread(Runnable) or View.post(Runnable) (see Processes and Threads) or Handler.handleMessage() (see Communicating with the UI Thread).
If you want to reset or change preferences of an app at the first start here is an example of code you can put in an event as onCreate of the main activity: