Using Java classes in Android apps with Java2OP

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.

Getting ready

This recipe is an upgraded version of the Using Android SDK Java classes recipe. Indeed, while in the first recipe, we created the Object Pascal files by hand, reading the Android documentation, here, we'll use the Java2OP.exe utility to automatically generate them. This is the process that you will use 90% of the time (if you have a modern version of Delphi). However, the first...