java - 线程因未捕获的异常而退出

Question

嗨!

我的代码:

Thread thread = new Thread (){
            @Override
            public void run() {
                while (true)
                {
                    Handler handler = new Handler(){
                          @Override
                          public void handleMessage(Message msg) {

                             if (msg.obj.toString()!= null)
                             {
                             JSONParse json = null;
                             try {
                                Log.e("Channel_State",msg.obj.toString());
                                 json = new JSONParse(msg.obj.toString());
                                String state = json.getChannelState();
                                id = state;
                                 TextView tv2 = (TextView)findViewById(R.id.mainscreen_state);
                                 tv2.setText("Channel State: "+ state);
                                Log.e("State",state);
                            } catch (final Exception e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                                runOnUiThread(new  Runnable() {
                                    public void run() {
                                        Toast toast ;
                                        toast =     Toast.makeText(getApplicationContext(), "Error" + e.getMessage(), 500);
                                        Log.e("Error",e.getMessage());
                                        toast.show();
                                    }
                                });
                            }

                             }
                             else
                             {

                               runOnUiThread(new  Runnable() {
                                public void run() {
                                    Toast toast ;
                                    toast =     Toast.makeText(getApplicationContext(), "error", 500);

                                    toast.show();
                                }
                            });
                             }
                          }
                          };

                    List<NameValuePair> params = new ArrayList<NameValuePair>();
                    params.add(new BasicNameValuePair("session_id", settings.getString("session_id","error")));
                    params.add(new BasicNameValuePair("channel_id",String.valueOf(settings.getInt("channel_id", -1))));
                    HttpConnection con = new HttpConnection(params, "http://surfkid.redio.de/getChannelImage", handler);
                    con.start();
                    try {
                        Log.e("Sleep","Begin");
                        this.sleep(5000);
                        Log.e("Sleep","End");

                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        Log.e("Sleep","Fail");
                    }

                }
            }
        };
        thread.start();

日志:

02-10 00:01:29.044: ERROR/AndroidRuntime(1248): Uncaught handler: thread Thread-13 exiting due to uncaught exception
02-10 00:01:29.054: ERROR/AndroidRuntime(1248): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
02-10 00:01:29.054: ERROR/AndroidRuntime(1248):     at android.os.Handler.<init>(Handler.java:121)
02-10 00:01:29.054: ERROR/AndroidRuntime(1248):     at android.skiptvad.MainScreen$6$1.<init>(MainScreen.java:258)
02-10 00:01:29.054: ERROR/AndroidRuntime(1248):     at android.skiptvad.MainScreen$6.run(MainScreen.java:258)

请帮忙!

Answer 1

似乎您想要做的是创建一个 HandlerThread

HandlerThread myThread = new HandlerThread();
myThread.start();
Handler myHandler = new Handler(myThread.getLooper()){
//your handler code.
}

这应该会为您提供一个由您的处理程序按照您正在寻找的方式处理的线程。