谷歌自動完成無法解決getActivity（）

-2

我是新的android編程，我有這個片段從互聯網上的某個地方，它說「無法解決getActivity（）」然後我嘗試使用getApplicationContext（），但自動完成沒有功能。我該怎麼做才能讓它順利運行？谷歌自動完成無法解決getActivity（）

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, DirectionFinderListener { 

private GoogleMap mMap; 
private Button btnFindPath; 
//private EditText etOrigin; 
//private EditText etDestination; 
private List<Marker> originMarkers = new ArrayList<>(); 
private List<Marker> destinationMarkers = new ArrayList<>(); 
private List<Polyline> polylinePaths = new ArrayList<>(); 
private ProgressDialog progressDialog; 



@Override 
protected void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_maps); 
    // Obtain the SupportMapFragment and get notified when the map is ready to be used. 
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() 
      .findFragmentById(R.id.map); 
    mapFragment.getMapAsync(this); 
    AutoCompleteTextView etOriginView = (AutoCompleteTextView) findViewById(R.id.etOrigin); 
    etOriginView.setAdapter(new PlacesAutoCompleteAdapter(getActivity(), R.layout.autocomplete_list_item)); 
    etOriginView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
             @Override 
             public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
              // Get data associated with the specified position 
              // in the list (AdapterView) 
              String description = (String) parent.getItemAtPosition(position); 
              Toast.makeText(getActivity(), description, Toast.LENGTH_SHORT).show(); 
             } 
            }); 

    btnFindPath = (Button) findViewById(R.id.btnFindPath); 
    //etOrigin = (EditText) findViewById(R.id.etOrigin); 
    //etDestination = (EditText) findViewById(R.id.etDestination); 

    btnFindPath.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      sendRequest(); 
     } 
    }); 
}

PlacesAutoCompleteAdapter類

class PlacesAutoCompleteAdapter extends ArrayAdapter<String> implements Filterable { 

ArrayList<String> resultList; 

Context mContext; 
int mResource; 

PlaceAPI mPlaceAPI = new PlaceAPI(); 

public PlacesAutoCompleteAdapter(Context context, int resource) { 
    super(context, resource); 

    mContext = context; 
    mResource = resource; 
} 

@Override 
public int getCount() { 
    // Last item will be the footer 
    return resultList.size(); 
} 

@Override 
public String getItem(int position) { 
    return resultList.get(position); 
} 

@Override 
public Filter getFilter() { 
    Filter filter = new Filter() { 
     @Override 
     protected FilterResults performFiltering(CharSequence constraint) { 
      FilterResults filterResults = new FilterResults(); 
      if (constraint != null) { 
       resultList = mPlaceAPI.autocomplete(constraint.toString()); 

       filterResults.values = resultList; 
       filterResults.count = resultList.size(); 
      } 

      return filterResults; 
     } 

     @Override 
     protected void publishResults(CharSequence constraint, FilterResults results) { 
      if (results != null && results.count > 0) { 
       notifyDataSetChanged(); 
      } 
      else { 
       notifyDataSetInvalidated(); 
      } 
     } 
    }; 

    return filter; 

}

}

任何幫助表示讚賞，謝謝提前！我的Google Places API Web服務告訴我，我有100％的錯誤，所以這意味着我的適配器出了問題？

來源

2016-12-05 Jean

這就是當你複製粘貼不理解的每一行代碼，你會得到什麼的。你已經在一個'Activity'中了，所以調用'getActivity（）'沒有任何意義。怎麼樣'這個'而不是？ –

嘗試MapsActivity.this insted的getActivity（）

來源

2016-12-05 10:49:03

谷歌自動完成無法解決getActivity（）

回答

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