为什么这个节目不播放音乐?我正在尝试使用JavaFX创建一个应用程序,以允许用户播放他想要播放的任何mp3文件 . 但它根本不起作用!为什么?它绝对没有错误!
附注:修复发现的任何语法错误
package application;
import java.io.File;
import java.nio.file.Paths;
import java.util.ArrayList;
import javafx.application.Application;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.image.Image;
import javafx.stage.DirectoryChooser;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
public class Start extends Application {
public void start(Stage primStage) {
try {
//Validation for first time start
Alert a = new Alert(AlertType.INFORMATION);
a.setTitle("Welcome");
a.setHeaderText("Welcome to Orpheus!");
a.setContentText("Welcome to Orpheus. Pick the folder in which all your music is located");
Stage stg = (Stage) a.getDialogPane().getScene().getWindow();
stg.getIcons().add(new Image(this.getClass().getResource("harp.png").toString()));
primStage.getIcons().add(new Image(this.getClass().getResource("harp.png").toString()));
a.showAndWait();
DirectoryChooser dc = new DirectoryChooser();
dc.setInitialDirectory(new File(System.getProperty("user.home")));
dc.setTitle("Pick your folder!");
File f = dc.showDialog(primStage);
File[] fileArray = f.listFiles();
boolean[] song = new boolean[fileArray.length];
int j = 0;
if (fileArray != null) {
for (File child : fileArray) {
String ext = "";
int i = child.getName().lastIndexOf('.');
if (i >= 0) {
ext = child.getName().substring(i+1);
}
if (ext.equals("mp3")) {
song[j] = true;
j++;
} else {
song[j] = false;
j++;
}
}
}
j = 0;
ArrayList<File> fileList = new ArrayList<>();
for (boolean b : song) {
if(b) {
fileList.add(fileArray[j]);
}
j++;
}
//New codes!
ArrayList<String> names = new ArrayList<>();
for (File fi : fileList) {
String tmp = fi.getCanonicalPath();
tmp = tmp.replaceAll("\\\\", "/");
names.add(tmp);
}
Media m = new Media("file:///" + names.get(0));
MediaPlayer mp = new MediaPlayer(m);
mp.play();
//App ends with no sleep method for threads
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}
EDIT: (不再出现)感谢@fabian的帮助,我更换了一些代码 . 但现在我得到错误:
MediaException:MEDIA_UNAVAILABLE:\ file:\ C:\ Users \ Kaboom \ Music \ Closer.mp3(文件名,目录名或卷标语法不正确),位于javafx.scene.media.Media . (Media.java:407 )at com.unart.start(Start.java:75)at com.sun.javafx.application.LauncherImpl.lambda $ launchApplication1 $ 162(LauncherImpl.java:863)at com.sun.javafx.application.PlatformImpl.lambda $ runAndWait $ com(PlatformImpl.java:326)at com.sun.javafx.application.PlatformImpl.lambda $ null $ 173(PlatformImpl.java:295)at java.security.AccessController.doPrivileged(Native Method)at com.sun.javafx.application .platformImpl.lambda $ runLater $ 174(PlatformImpl.java:294)at com.sun.glass.ui.InvokeLaterDispatcher $ Future.run(InvokeLaterDispatcher.java:95)at com.sun.glass.ui.win.WinApplication._runLoop(本地方法)at com.sun.glass.ui.win.WinApplication.lambda $ null $ 148(WinApplication.java:191)at java.lang.Thread.run(Unknown Source)
EDIT 2: 我做了一些研究并取代了一些代码 . 现在唯一发生的事情是没有音乐播放和应用程序结束运行 . 我做错了什么?为什么没人帮忙?
1 回答
我弄清楚这个问题出了什么问题 . 非常愚蠢 .
我只需要将MediaPlayer添加到MediaView并进入GUI