Pause issue JavaFX - javafx

Question

I'm trying to build a media player with JavaFX. First, I loaded a video, next I created pause button and work fine. When i load a new video with the open button ("apri") the video works but the pause button won't work properly -_- here my main class.. I don'have used the scenebuilder but I'm trying with only the code
public class Main extends Application {
public String indirizzo = "file:///C:/Users/ASUS/Desktop/film/prova1.mp4";
#Override
public void start(Stage primaryStage) {
try {
/* Creo la scena e mi faccio passare il media da visualizzare */
/* Creo i pannelli */
BorderPane bp = new BorderPane();
StackPane sp = new StackPane();
HBox hb = new HBox(5);
VBox vb = new VBox();
/* Primo video */
MediaView mv = new MediaView();
Media m = new Media(indirizzo);
MediaPlayer mp = new MediaPlayer(m);
mv.setMediaPlayer(mp);
mp.play();
/* Creo gli oggetti nella parte bassa*/
Slider misc = new Slider();
Slider sl = new Slider();
Label volume = new Label("Volume: ");
Button btn1 = new Button("Apri");
Button btn2 = new Button("<<");
Button btn3 = new Button("| |");
Button btn4 = new Button(">>");
hb.setAlignment(Pos.CENTER);
hb.setPadding(new Insets(5,10,5,10));
/* Dimensioni slider */
sl.setPrefWidth(70);
sl.setMinWidth(30);
sl.setValue(100);
/* Posiziono i pannelli */
bp.setCenter(mv);
hb.getChildren().addAll(btn1,btn2,btn3,btn4,volume,sl);
vb.getChildren().addAll(misc,hb);
bp.setBottom(vb);
/* Se schiaccio il pulsante apri */
btn1.setOnAction(new EventHandler<ActionEvent>() {
#Override public void handle(ActionEvent e) {
/* Prima metto in pausa il video */
FileChooser fc = new FileChooser();
ExtensionFilter filtro = new ExtensionFilter("Seleziona media (*.mp4)","*.mp4");
fc.getExtensionFilters().add(filtro);
/* Apro la finestra di dialogo per caricare il file */
File file = fc.showOpenDialog(null);
indirizzo = file.toURI().toString();
if(file != null){
/* Carico il media nel mp */
Media m = new Media(indirizzo);
MediaPlayer mp = new MediaPlayer(m);
mv.setMediaPlayer(mp);
/* Imposto dimensione Media View*/
mv.setFitHeight(500); /* Vanno bindate con la scene*/
mv.setFitWidth(500);
mp.play();
DoubleProperty mvw = mv.fitWidthProperty();
DoubleProperty mvh = mv.fitHeightProperty();
mvw.bind(Bindings.selectDouble(mv.sceneProperty(), "width"));
mvh.bind(Bindings.selectDouble(mv.sceneProperty(), "height"));
mv.setPreserveRatio(true);
}
}
});
btn3.setOnAction((ActionEvent e) -> {
Status currentStatus = mp.getStatus();
if(currentStatus == Status.PLAYING)
mp.pause();
else if(currentStatus == Status.PAUSED || currentStatus == Status.STOPPED){
mp.play();
}
});
Scene scena = new Scene(bp,500,500);
scena.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setScene(scena);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}

Answer 1

Here is the problem:
if(file != null){
/* Carico il media nel mp */
Media m = new Media(indirizzo);
MediaPlayer mp = new MediaPlayer(m);
You are using new variable mp which is not visible to btn3.setOnAction() handler.
To address that make MediaPlayer mp a class' field and don't introduce new variables with the mp name.