The following source code will create a user interface using JavaFX FXML with source code from either an .xml or .fxml file. SceneBuilder (an app available from gluon) will allow the user to drag 'n drop controls onto a window and will automatically generate an .fxml file that can be opened in Android Studio. The alternative is to write your own .xml file using a standard text editor of your choice; this technique requires that you have some understanding of xml syntax. An example with an .xml file is shown below.
Processing Source Code:
import javafx.fxml.FXMLLoader;
import javafx.fxml.FXML;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.control.Button;
import java.io.File;
import java.net.URL;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.MalformedURLException;
import javafx.fxml.LoadException;
import java.io.IOException;
URL url;
Pane pane;
class MyController {
@FXML
void initialize() {
println("Controller was initialized.");
}
@FXML
void myBtnAction() {
println("You hit btn1.");
}
}
void setup() {
size(1, 1, FX2D);
FXMLLoader loader = new FXMLLoader();
MyController myController = new MyController();
File file = new File(sketchPath() + "/gui.xml");
URI uri = file.toURI();
try {
url = uri.toURL();
}
catch(MalformedURLException e) {
println(e);
}
println("url =", url);
loader.setController(myController);
loader.setLocation(url);
try {
pane = loader.<Pane>load();
println("pane =", pane);
println("children =", pane.getChildren());
}
catch(IOException e) {
println("error:", e.getCause());
}
Stage stage = new Stage();
Scene scene = new Scene(pane);
stage.setScene(scene);
stage.show();
}
gui.xml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.Pane?>
<Pane prefHeight="200.0" prefWidth="400.0">
<children>
<Button layoutX="170.0" layoutY="60.0" onAction="#myBtnAction" prefHeight="26.0" prefWidth="63.0" text="Btn1" />
</children>
</Pane>
Output:
