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我是一名 android 开发初学者，所以我想让 2 个线程在后台同时运行（或不同时运行），一个用于测试 Wifi 连接，另一个用于超时响应进度条（或另一个用于显示应用程序没有死的东西)，在“main”中我要等待，如果 wifi 测试比超时快，则发送用户一页，如果超时用完，则发送用户另一页。我已经有线程，一个做超时+进度条和其他检查连接，我的问题是谁在等待快速线程结束，我尝试循环检查thread.isalive（），但这样进度条没有t 显示，并且应用程序冻结，直到某个线程结束... =\

有什么帮助吗？！对不起我的英语不好...

公共无效 startProgress() {

    Runnable r1 = new Runnable() {
        public void run() {
            for (int i = 0; i <= 10; i++) {
                final int value = i;
                try {
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                handler.post(new Runnable() {
                    public void run() {
                        progress.setProgress(value);
                    }
                });
            }
            setContentView(R.layout.error_menu);
            //finish();
        }
    };
    Thread th1 = new Thread(r1);
    th1.start();

    Runnable r2 = new Runnable() {
        // Setup the run() method that is called when the background thread
        // is started.
        public void run() {
            // Do you background thread process here...
            // Checking if WIFI is ON and IF URL is Reachable
            if(isOnline()){
                String URL_STR="http://10.0.1.2/ShopList_for_app.php";
                try
                {
                    URL url = new URL(URL_STR);
                    HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
                    urlc.setRequestProperty("User-Agent", "Test");
                    urlc.setRequestProperty("Connection", "close");
                    urlc.setConnectTimeout(7000); // This is time limit if the connection time limit
                    urlc.connect();
                    if (urlc.getResponseCode() == 200){ 
                        setContentView(R.layout.menu1);
                        //finish();//return;
                    }else{
                        //finish();//return;
                    }
                }
                catch (MalformedURLException e){
                    Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_LONG).show();
                    //finish();//return;
                }
                catch (IOException e){
                    Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_LONG).show();
                    //finish();//return;
                }
            }else{
                //finish();//return;
            }
        }
    };
    Thread th2 = new Thread(r2);
    th2.start();
    Toast.makeText(getBaseContext(), "..Correu todas as Threads..", Toast.LENGTH_LONG).show();


    while(true){
        if(th2.isAlive()){
            //Toast.makeText(getBaseContext(),"checking...", Toast.LENGTH_LONG).show();

        }else{              
            th1.interrupt();
            setContentView(R.layout.menu1);
            break;
        }           
            if(th1.isAlive()){
            //Toast.makeText(getBaseContext(),"checking...", Toast.LENGTH_LONG).show();

        }else{
            th2.interrupt();
            setContentView(R.layout.error_menu);
            break;
    }

}
}
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