Can't create handler inside thread that has not called Looper.prepare()

骑猪看日落 2022-07-14 00:10 70阅读 0赞

# WebService #

public class WebService extends Service { 
    
        private Server server;
    
        @Override
        public IBinder onBind(Intent intent) {
            return null;
        }
    
        @Override
        public int onStartCommand(Intent intent, int flags, int startId) {
            startForeground(9999, new Notification());
            startServer();
            return super.onStartCommand(intent, flags, startId);
        }
    
        @Override
        public void onDestroy() {
            stopServer();
            super.onDestroy();
        }
    
        private void startServer() {
            if (server != null) {
                Toast.makeText(this, "服务器已经开启", Toast.LENGTH_SHORT).show();
                return;
            }
            new Thread(new StartRunnable()).start();
        }
    
        private void stopServer() {
            if (server != null) {
                new Thread(new StopRunnable()).start();
            }
        }
    
        class StartRunnable implements Runnable {
            @Override
            public void run() {
                try {
                    File JETTY_DIR = new File(Environment.getExternalStorageDirectory(), "jetty");
                    // Set jetty.home
                    System.setProperty("jetty.home", JETTY_DIR.getAbsolutePath());
    
                    // ipv6 workaround for froyo
                    System.setProperty("java.net.preferIPv6Addresses", "false");
    
                    server = new Server(8090);
                    // server.setHandler(new DefaultHandler());
                    ServletContextHandler contextHandler = new ServletContextHandler(ServletContextHandler.SESSIONS);
                    contextHandler.setContextPath("/");
                    server.setHandler(contextHandler);
                    ServlertConfig.config(contextHandler);
    
                    server.start();
                    server.join();
                    Toast.makeText(WebService.this, "服务器启动", Toast.LENGTH_SHORT).show();
                } catch (Exception e) {
                    server = null;
                    e.printStackTrace();
                    Toast.makeText(WebService.this, "服务器启动失败", Toast.LENGTH_SHORT).show();
                }
            }
        }
    
        class StopRunnable implements Runnable {
            @Override
            public void run() {
                try {
                    server.stop();
                    server = null;
                    Toast.makeText(WebService.this, "服务器关闭", Toast.LENGTH_SHORT).show();
                } catch (Exception e) {
                    e.printStackTrace();
                    Toast.makeText(WebService.this, "服务器关闭失败", Toast.LENGTH_SHORT).show();
                }
            }
        }
    }

java.lang.RuntimeException: Can’t create handler inside thread that has not called Looper.prepare()