May 2017
Beginner to intermediate
470 pages
10h 49m
English
Content preview from Android System Programming
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The updater script
After we explore the implementation of updater, we will look at the updater script in this section. The updater script is the one that performs the update operations in the target device. The updater script is written in a simple script language called edify. An edify script is a list of expressions, one expression per line. It supports the following operators:
- The comparison operators, such as == (string equal) and != (string not equal)
- The logical operators, such as || (logical or), && (logical and), and ! (logical not)
- The concatenation operator +
The only reserved keywords are conditional keywords if, then, else, and endif.
All values in edify are strings. Empty strings are false in a Boolean context and all other ...
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