在片段中使用.getActivity（）后无法访问的语句 [英] unreachable statement after using .getActivity( ) in a Fragment

问题描述

我想在片段中使用.getSystemService。当我使用.getActivity（）获取我的活动的上下文时，Android Studio告诉我，这是一个无法访问的语句。

在我使用getActivity（）的行的上面一行，它会显示这条行在顶部是无法访问的。

为什么以及如何解决这个问题？

  public class NewNodeFragment extends Fragment {
 
 // GPS信号
 double pLat; 
 double pLong; 
 
 @Override 
 public view onCreateView（LayoutInflater inflater，ViewGroup container，Bundle savedInstanceState）{
 return inflater.inflate（R.layout.newnode_layout，container，false）; 
 
 // GPS信号
 LocationManager gpsmanager =（LocationManager）getActivity（）。getSystemService（Context.LOCATION_SERVICE）; 
位置lastLocation = gpsmanager.getLastKnownLocation（LocationManager.GPS_PROVIDER）; 
 
 if（lastLocation！= null）{
 pLat = lastLocation.getLatitude（）; 
 pLong = lastLocation.getLongitude（）; 
} 
 
 LocationListener gpslistener = new mylocationListener（）; 
 gpsmanager.requestLocationUpdates（LocationManager.GPS_PROVIDER，0，0，gpsl​​istener）; 
 
  

解决方案

你的方法的第一行，就在你的注释// GPS信号的行的上方......

返回语句之后的任何东西当然是无法访问的代码。 p>

I want to use .getSystemService in a Fragment. When i use .getActivity() to get the context of my activity, Android Studio tells me in the same line that this is a "unreachable statement".

When there is a line above the line where i use "getActivity()", it will show that this line on top is unreachable.

Why and how to fix this?

public class NewNodeFragment extends Fragment {

//GPS SIGNAL
double pLat;
double pLong;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.newnode_layout, container,false);

    //GPS SIGNAL
    LocationManager gpsmanager = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE);
    Location lastLocation = gpsmanager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

    if (lastLocation != null) {
        pLat = lastLocation.getLatitude();
        pLong = lastLocation.getLongitude();
    }

    LocationListener gpslistener = new mylocationListener();
    gpsmanager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, gpslistener);
}

解决方案

You have a return statement as the first line in your method, right above the line that has your comment //GPS SIGNAL...

Anything after a return statement is of course unreachable code.

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