In this recipe, we will talk about the Java2OP command-line utility. Java2OP.exe (Java To Object Pascal) is a command-line tool that you can use to generate Delphi-native bridge files from Java libraries (JAR or class files). Once having generated the Object Pascal files describing the Java needed classes, you can then use them to provide your Delphi application's access to those Java libraries on Android.
Java2OP.exe is included in the most recent Delphi versions and is available at the following path: <RAD Studio>\bin\converters\java2op\java2op.exe.