Android saves the image conversion to the database, and then reads and converts it into image implementation code from the database

First, we need to store the pictures in the database. First, we need to create a database, as shown below:

The code comments are more detailed

The key point here is that when initializing the database and converting drawable into byte [], first convert drawable into bitmap, then store the bitmap in the byte data output stream and obtain the byte [] array from the output stream.

Then store the character array into the database of type blob.

Then take byte [] from the database in the code, convert it into drawable, and set the picture.

The code is as follows:

Focus on how to convert byte [] retrieved from the database into drawable:

The operation effect is as follows: