Android Studio-E/AndroidRuntime：致命例外：主-maps V2

我是android新手。運行時，我的應用在logCat上顯示以下錯誤。任何幫助表示讚賞。Android Studio-E/AndroidRuntime：致命例外：主-maps V2

我宣佈「家」類作爲導航抽屜的一部分。當我插入此代碼時，似乎存在問題。

在此先感謝。

Java代碼：

import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.Marker; 
import com.google.android.gms.maps.model.MarkerOptions; 
import java.util.ArrayList; 
import java.util.HashMap; 

public class Home extends Fragment 
{ 
    private GoogleMap mMap; 
    private ArrayList<MyMarker> mMyMarkersArray = new ArrayList<MyMarker>(); 
    private HashMap<Marker, MyMarker> mMarkersHashMap; 

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

     // Initialize the HashMap for Markers and MyMarker object 
     mMarkersHashMap = new HashMap<Marker, MyMarker>(); 

     mMyMarkersArray.add(new MyMarker("loc1", "icon1", Double.parseDouble("44.637564"), Double.parseDouble("-63.5753207"))); 
     mMyMarkersArray.add(new MyMarker("loc2", "icon2", Double.parseDouble("44.6462628"), Double.parseDouble("-63.5721407"))); 
     mMyMarkersArray.add(new MyMarker("loc3", "icon3", Double.parseDouble("44.6470678"), Double.parseDouble("-63.5747943"))); 
     mMyMarkersArray.add(new MyMarker("loc4", "icon4", Double.parseDouble("43.5643397"), Double.parseDouble("-65.5643972"))); 
     mMyMarkersArray.add(new MyMarker("loc5", "icon5", Double.parseDouble("44.6556674"), Double.parseDouble("-63.6056877"))); 
     mMyMarkersArray.add(new MyMarker("loc6", "icon6", Double.parseDouble("44.6892204"), Double.parseDouble("44.6892204"))); 
     mMyMarkersArray.add(new MyMarker("loc7", "icon7", Double.parseDouble("44.6367517"), Double.parseDouble("-63.5839683"))); 
     mMyMarkersArray.add(new MyMarker("loc8", "icondefault", Double.parseDouble("44.6508492"), Double.parseDouble("-63.592472"))); 

     setUpMap(); 

     plotMarkers(mMyMarkersArray); 
    } 

    private void plotMarkers(ArrayList<MyMarker> markers) 
    { 
     if(markers.size() > 0) 
     { 
      for (MyMarker myMarker : markers) 
      { 
       // Create user marker with custom icon and other options 
       MarkerOptions markerOption = new MarkerOptions().position(new LatLng(myMarker.getmLatitude(), myMarker.getmLongitude())); 
       markerOption.icon(BitmapDescriptorFactory.fromResource(R.drawable.smallicon1)); 
       Marker currentMarker = mMap.addMarker(markerOption); 
       mMarkersHashMap.put(currentMarker, myMarker); 
       mMap.setInfoWindowAdapter(new MarkerInfoWindowAdapter()); 
      } 
     } 
    } 

    private int manageMarkerIcon(String markerIcon) 
    { 
     if (markerIcon.equals("icon1")) 
      return R.drawable.smallicon1; 
     else if(markerIcon.equals("icon2")) 
      return R.drawable.smallicon1; 
     else if(markerIcon.equals("icon3")) 
      return R.drawable.smallicon1; 
     else if(markerIcon.equals("icon4")) 
      return R.drawable.smallicon1; 
     else if(markerIcon.equals("icon5")) 
      return R.drawable.smallicon1; 
     else if(markerIcon.equals("icon6")) 
      return R.drawable.smallicon1; 
     else if(markerIcon.equals("icon7")) 
      return R.drawable.smallicon1; 
     else 
      return R.drawable.smallicon1; 
    } 

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

    private void setUpMap() 
    { 
     // Do a null check to confirm that we have not already instantiated the map. 
     if (mMap == null) 
     { 
      // Try to obtain the map from the SupportMapFragment. 
      mMap = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap(); 

      // Check if we were successful in obtaining the map. 

      if (mMap != null) 
      { 
       mMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() 
       { 
        @Override 
        public boolean onMarkerClick(com.google.android.gms.maps.model.Marker marker) 
        { 
         marker.showInfoWindow(); 
         return true; 
        } 
       }); 
      } 
      else 
       Toast.makeText(getActivity().getApplicationContext(), "Unable to create Maps", Toast.LENGTH_SHORT).show(); 
     } 
    } 

    public class MarkerInfoWindowAdapter implements GoogleMap.InfoWindowAdapter 
    { 
     public MarkerInfoWindowAdapter() 
     { 
     } 

     @Override 
     public View getInfoWindow(Marker marker) 
     { 
      return null; 
     } 

     @Override 
     public View getInfoContents(Marker marker) 
     { 
      View v = getActivity().getLayoutInflater().inflate(R.layout.infowindow_layout, null); 

      MyMarker myMarker = mMarkersHashMap.get(marker); 

      ImageView markerIcon = (ImageView) v.findViewById(R.id.marker_icon); 

      TextView markerLabel = (TextView)v.findViewById(R.id.marker_label); 

      TextView anotherLabel = (TextView)v.findViewById(R.id.another_label); 

      markerIcon.setImageResource(manageMarkerIcon(myMarker.getmIcon())); 

      markerLabel.setText(myMarker.getmLabel()); 
      anotherLabel.setText("A custom text"); 

      return v; 
     } 
    } 

    public void onDestroy() 
    { 
     super.onDestroy(); 

    } 

    @Override 
    public void onDetach() 
    { 
     super.onDetach(); 
    } 
}

Tomcat的：

10-28 17:06:11.301 13300-13300/com.example.chid.parktrial1 W/dalvikvm﹕ 
threadid=1: thread exiting with uncaught exception (group=0x4181cc08) 
10-28 17:06:11.306 13300-13300/com.example.chid.parktrial1 E/AndroidRuntime﹕ 
FATAL EXCEPTION: main Process: com.example.chid.parktrial1, PID: 13300 java.lang.RuntimeException: Unable to start activity ComponentInfo 
{com.example.chid.parktrial1/com.example.chid.parktrial1.SuperPark}: 
java.lang.NullPointerException 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2447) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2507) 
    at android.app.ActivityThread.access$900(ActivityThread.java:172) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:146) 
    at android.app.ActivityThread.main(ActivityThread.java:5692) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107) 
    at dalvik.system.NativeStart.main(Native Method) 
Caused by: java.lang.NullPointerException 
    at com.example.chid.parktrial1.Home.setUpMap(Home.java:149) 
    at com.example.chid.parktrial1.Home.onCreate(Home.java:87) 
    at android.support.v4.app.Fragment.performCreate(Fragment.java:1942) 
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1040) 
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1259) 
    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738) 
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1624) 
    at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:330) 
    at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:547) 
    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1177) 
    at android.app.Activity.performStart(Activity.java:5551) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2420) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2507) 
    at android.app.ActivityThread.access$900(ActivityThread.java:172) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:146) 
    at android.app.ActivityThread.main(ActivityThread.java:5692) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107) 
    at dalvik.system.NativeStart.main(Native Method) 
10-28 17:06:14.401 13300-13300/com.example.chid.parktrial1 I/Process﹕ Sending signal. PID: 13300 SIG: 9

來源

2015-10-28 Chid

我提交的編輯你的問題，但它可能不會馬上接受，所以你可以自己做。您的代碼塊的格式不正確。當他們格式正確時，人們會更加認真地回答問題。 –

我無法評論使得它真的很難指出的是，在註釋中實現小東西。

PS：格式化你的問題正確，以更好地理解這個問題

不管怎麼說，添加LayoutInflater並在getInfoComponents()方法使用Layoutinflater膨脹觀。由於您正在定義片段中的視圖。

public class Home extends Fragment{ 

    LayoutInflater inflater=null; 



    ... 

    public class MarkerInfoWindowAdapter implements GoogleMap.InfoWindowAdapter { 

     // constuctor 
     public MarkerInfoWindowAdapter(LayoutInflater inflater) { 
      this.inflater=inflater; 
     } 

     @Override 
     public View getInfoContents(Marker marker) { 
      View v = inflater.inflate(R.layout.infowindow_layout, null); 

      } 
     } 

}

使用LayoutInflater膨脹的View在getInfoComponents()

來源

2015-10-28 21:20:14

Android Studio-E/AndroidRuntime：致命例外：主-maps V2

回答

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