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Android 为什么处理程序语句是不可转换的代码?_Android_Service_Handler_Runnable - Fatal编程技术网

Android 为什么处理程序语句是不可转换的代码?

Android 为什么处理程序语句是不可转换的代码?,android,service,handler,runnable,Android,Service,Handler,Runnable,这是我创建的服务类的代码。它在handler.post(timedtask)行给出了一个无法访问的代码错误。我在下面用粗体字评论了一下。请帮我解决这个问题。真要命 公共类ServerChecker扩展服务{ 通知建筑商和造船商; 意图结果; 处理者; 可运行时间任务; 串总线号; int-mystoppageindex public ServerChecker() { } @Override public void onCreate() { super.onCreate();

这是我创建的服务类的代码。它在handler.post(timedtask)行给出了一个无法访问的代码错误。我在下面用粗体字评论了一下。请帮我解决这个问题。真要命
公共类ServerChecker扩展服务{ 通知建筑商和造船商; 意图结果; 处理者; 可运行时间任务; 串总线号; int-mystoppageindex

public ServerChecker() {

}

@Override
public void onCreate() {
    super.onCreate();



bus_no = PrefsHelper.getFromPreferences(MyApplication.getAppContext(),  "BUSNO", "");
mBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(this)
.setTicker("Your bus is arriving")
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("My notification")
.setContentText("Hello World!")
.setDefaults(Notification.DEFAULT_SOUND)
.setAutoCancel(true);
resultIntent = new Intent(this, LoginActivity.class);
String url = Config.url + "arrivalwarning.php?bus_no=3-C";

final StringRequest request = new StringRequest(Request.Method.GET, url, new  Response.Listener<String>() {
@Override
public void onResponse(String response) {

mystoppageindex = Integer.parseInt(PrefsHelper.getFromPreferences(MyApplication.getAppContext(), "STOPPAGEINDEX", ""));

try {
JSONObject jsonObject = new JSONObject(response);
int currentstoppageindex = Integer.parseInt(jsonObject.getString("stoppage_index"));

                if (mystoppageindex - currentstoppageindex == 2) {

                    TaskStackBuilder stackBuilder = TaskStackBuilder.create(MyApplication.getAppContext());
                    stackBuilder.addParentStack(LoginActivity.class);
                    stackBuilder.addNextIntent(resultIntent);
                    PendingIntent resultPendingIntent =
                            stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
                    mBuilder.setContentIntent(resultPendingIntent);
                    NotificationManager mNotificationManager =
                            (NotificationManager)      getSystemService(Context.NOTIFICATION_SERVICE);
                    mNotificationManager.notify(0, mBuilder.build());
                }


            } catch (JSONException e) {
                e.printStackTrace();
            }


        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });

    handler = new Handler();

    timedtask = new Runnable() {
        @Override
        public void run()
        {
            Log.d("TAG","Runnable");

          //  VolleySingleton.getInstance().getRequestQueue().add(request);

            handler.postDelayed(timedtask, 60000);
        }

    };






}


@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    return super.onStartCommand(intent, flags, startId);

    handler.post(timedtask); **// WHY IS THIS LINE AN ERROR UNREACHABLE CODE**
}


@Override
public IBinder onBind(Intent intent) {
    // TODO: Return the communication channel to the service.
    throw new UnsupportedOperationException("Not yet implemented");
}


@Override
public void onDestroy() {
    super.onDestroy();
    handler.removeCallbacks(timedtask);
}
}
publicserverchecker(){
}
@凌驾
public void onCreate(){
super.onCreate();
bus_no=PrefsHelper.getFromPreferences(MyApplication.getAppContext(),“BUSNO”,“”);
mBuilder=(NotificationCompat.Builder)新建NotificationCompat.Builder(此)
.setTicker(“您的巴士即将到达”)
.setSmallIcon(R.mipmap.ic_启动器)
.setContentTitle(“我的通知”)
.setContentText(“你好,世界!”)
.setDefaults(通知.DEFAULT\u声音)
.setAutoCancel(真);
resultIntent=新意图(这是LoginActivity.class);
字符串url=Config.url+“arrivalwarning.php?bus_no=3-C”;
final StringRequest=new StringRequest(request.Method.GET,url,new Response.Listener()){
@凌驾
公共void onResponse(字符串响应){
mystoppageindex=Integer.parseInt(PrefsHelper.getFromPreferences(MyApplication.getAppContext(),“STOPPAGEINDEX”,”);
试一试{
JSONObject JSONObject=新JSONObject(响应);
int currentstoppageindex=Integer.parseInt(jsonObject.getString(“停止索引”);
如果(mystoppageindex-currentstoppageindex==2){
TaskStackBuilder stackBuilder=TaskStackBuilder.create(MyApplication.getAppContext());
addParentStack(LoginActivity.class);
stackBuilder.addNextIntent(resultIntent);
悬而未决的结果悬而未决的结果=
stackBuilder.GetPendingEvent(0,PendingEvent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingContent);
通知经理通知经理=
(NotificationManager)getSystemService(上下文通知服务);
mNotificationManager.notify(0,mBuilder.build());
}
}捕获(JSONException e){
e、 printStackTrace();
}
}
},new Response.ErrorListener(){
@凌驾
公共无效onErrorResponse(截击错误){
}
});
handler=新的handler();
timedtask=newrunnable(){
@凌驾
公开募捐
{
Log.d(“标记”、“可运行”);
//VolleySingleton.getInstance().getRequestQueue().add(请求);
handler.postDelayed(timedtask,60000);
}
};
}
@凌驾
公共int onStartCommand(Intent Intent、int标志、int startId){
返回super.onStartCommand(intent、flags、startId);

handler.post(timedtask);**//为什么此行是一个无法访问的错误代码** } @凌驾 公共IBinder onBind(意向){ //TODO:将通信通道返回到服务。 抛出新的UnsupportedOperationException(“尚未实现”); } @凌驾 公共空间{ super.ondestory(); handler.removeCallbacks(timedtask); } }
这里有:

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    return super.onStartCommand(intent, flags, startId);

    handler.post(timedtask); **// WHY IS THIS LINE AN ERROR UNREACHABLE CODE**
}

因此,为了回答您的问题,我们需要知道您希望java如何在已返回的方法中执行语句…

“为什么此行是一个无法访问的错误代码”-因为您在return语句之后有它。把它移到前面。