自己的應用程序的Android地圖沒有顯示

我的Android應用程序有一個奇怪的問題。我實現了地圖，我得到了應該完成的api-key，將其插入到我的應用程序中....當我通過Eclipse直接在手機上啓動應用程序時，它可以工作。當我的應用程序導出到的APK，並把它傳遞給朋友，以測試它在其他手機，塔地圖從未顯示和應用程序崩潰，因爲在空的mapController：自己的應用程序的Android地圖沒有顯示

07-24 14:52:07.425: E/AndroidRuntime(4107): FATAL EXCEPTION: main 
07-24 14:52:07.425: E/AndroidRuntime(4107): java.lang.NullPointerException 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at com.google.android.maps.MapController.animateTo(MapController.java:232) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at com.google.android.maps.MapController.animateTo(MapController.java:203) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at com.emaborsa.cablePark.activities.MainActivity$5.onItemClick(MainActivity.java:492) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at com.emaborsa.cablePark.popUpMenu.MapPopupMenu$1.onClick(MapPopupMenu.java:163) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at android.view.View.performClick(View.java:4084) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at android.view.View$PerformClick.run(View.java:16966) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at android.os.Handler.handleCallback(Handler.java:615) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at android.os.Handler.dispatchMessage(Handler.java:92) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at android.os.Looper.loop(Looper.java:137) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at android.app.ActivityThread.main(ActivityThread.java:4745) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
07-24 14:52:07.425: E/AndroidRuntime(4107):  at dalvik.system.NativeStart.main(Native Method)

代碼：

public class MainActivity extends MapActivity { 



/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    Log.e("Log", "onCreate()"); 

    this.application = (CableParkApplication) getApplication(); 
    database = new DatabaseManager(getApplicationContext()); 

    if (getWindowManager().getDefaultDisplay().getRotation() == VERTICAL) { 
     setContentView(R.layout.main_v); 
    } else { 
     setContentView(R.layout.main_h); 
    } 

    if (savedInstanceState != null) { 
     this.currentView = savedInstanceState.getInt(CURRENT_VIEW); 
     this.mapType = savedInstanceState.getBoolean(MAP_TYPE); 
     this.country = savedInstanceState.getString(COUNTRY); 
     showMapMenu((LinearLayout) ((ImageView) mapViewContainer.findViewById(R.id.map_menu_open)).getParent()); 
    } 

    initViews(); 

    myLocationOverlay = new MyLocationOverlay(getApplicationContext(), mapView); 
    mapView.getOverlays().add(myLocationOverlay); 
    mapHandler = new MapHandler(this, mapView); 
    mapHandler.initMap(mapType); 
    addListeners(); 

    showActualFrame(); 

} 

protected void initViews() { 
    // initializes main view 
    mainView = (LinearLayout) findViewById(R.id.mainView); 
    LinearLayout main_view_vertical = (LinearLayout) getLayoutInflater().inflate(R.layout.mainview_v, null); 
    mainView.addView(main_view_vertical); 

    // initializes search view 
    searchMainView = (LinearLayout) findViewById(R.id.searchView); 
    LinearLayout search_view_vertical = (LinearLayout) getLayoutInflater().inflate(R.layout.searchview_v, null); 
    searchMainView.addView(search_view_vertical); 
    searchTextCountry = (TextView) findViewById(R.id.selectCountry); 
    selectCountryFlag = (ImageView) searchMainView.findViewById(R.id.selectCountryFlag); 
    searchEditTextKey = (EditText) findViewById(R.id.searchEditTextKey); 
    searchTextView = (TextView) findViewById(R.id.searchTextView); 
    searchButton = (LinearLayout) findViewById(R.id.searchButton); 

    if (country != null && !country.equals("")) { 
     searchTextCountry.setText(country); 
     String flag = country.toLowerCase().replace(" ", ""); 
     int resId = getResources().getIdentifier(flag, "drawable", CableParkApplication.PACKAGE); 
     selectCountryFlag.setImageResource(resId); 
    } 

    // initializes diary view 
    diaryMainView = (LinearLayout) findViewById(R.id.diaryView); 
    LinearLayout diary_view_vertical = (LinearLayout) getLayoutInflater().inflate(R.layout.diaryview_v, null); 
    diaryMainView.addView(diary_view_vertical); 

    // initializes map(container) view 
    mapViewContainer = (LinearLayout) findViewById(R.id.mapViewContainer); 
    LinearLayout map_view_container_vertical = (LinearLayout) getLayoutInflater().inflate(R.layout.mapviewcontainer_v, null); 
    mapViewContainer.addView(map_view_container_vertical); 
    mapView = (MapView) findViewById(R.id.mapView); 

    if (!application.isLoaded()) { 
     application.setLoaded(true); 
     Animation myFadeInAnimation = AnimationUtils.loadAnimation(this, R.anim.fadein); 
     myFadeInAnimation.setAnimationListener(new SplashAnimation(MainActivity.this, getWindowManager().getDefaultDisplay() 
       .getRotation())); 
     mainView.startAnimation(myFadeInAnimation); 
    } else { 
     findViewById(R.id.buttonsLayout).setVisibility(View.VISIBLE); 
     findViewById(R.id.id).setVisibility(View.INVISIBLE); 
    } 

    // initializes bottom buttons 
    searchImageLayout = (LinearLayout) findViewById(R.id.searchImageLayout); 
    mapImageLayout = ((LinearLayout) findViewById(R.id.mapImageLayout)); 
    diaryImageLayout = ((LinearLayout) findViewById(R.id.diaryImageLayout)); 

} 

private void addListeners() { 

    searchButton.setOnTouchListener(new View.OnTouchListener() { 

     public boolean onTouch(View v, MotionEvent event) { 
      if (event.getAction() == MotionEvent.ACTION_DOWN) { 
       searchButton.setBackgroundResource(R.drawable.singlebuttondown); 
       searchTextView.setTextColor(Color.YELLOW); 
       return true; 
      } else if (event.getAction() == MotionEvent.ACTION_UP) { 
       searchButton.setBackgroundResource(R.drawable.singlebutton); 
       searchTextView.setTextColor(getResources().getColor(R.color.gray)); 
       if (doSearch()) { 
        showSearchResult(); 
        hideSoftPad(); 
        showMap(null); 
       } else { 
        showNoResultDialog(); 
       } 
       return true; 
      } 
      return false; 
     } 
    }); 

    searchEditTextKey.setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      if (searchEditTextKey.getText().toString().equals("....?")) { 
       searchEditTextKey.setText(""); 
      } 
     } 
    }); 

    searchEditTextKey.setOnEditorActionListener(new TextView.OnEditorActionListener() { 

     public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { 
      if (actionId == EditorInfo.IME_ACTION_SEARCH) { 
       if (doSearch()) { 
        showSearchResult(); 
        hideSoftPad(); 
        showMap(null); 
       } else { 
        showNoResultDialog(); 
       } 
       return true; 
      } 
      return false; 
     } 
    }); 

} 

protected void showActualFrame() { 

    switch (currentView) { 
    case SEARCH: 
     showSearch(searchMainView); 
     break; 
    case MAP: 
     showMap(mapView); 
     break; 
    case DIARY: 
     showDiary(diaryMainView); 
     break; 
    default: 
     showFrame(mainView); 
    } 
} 

@Override 
protected void onResume() { 
    Log.e("Log", "onResume()"); 
    broadcastReceiver = new MessageReceiver(); 
    IntentFilter inFilter = new IntentFilter(); 
    inFilter.addAction(CableParkApplication.CANCEL); 
    inFilter.addAction(CableParkApplication.COUNTRY); 
    inFilter.addAction(CableParkApplication.SINGLE_PARK); 
    registerReceiver(broadcastReceiver, inFilter); 
    super.onResume(); 
    myLocationOverlay.enableMyLocation(); 
    myLocationOverlay.enableCompass(); 
}; 

@Override 
protected void onPause() { 
    unregisterReceiver(broadcastReceiver); 
    this.zoomLevel = mapView.getZoomLevel(); 
    this.mapCenter = mapView.getMapCenter(); 
    super.onPause(); 
    myLocationOverlay.disableMyLocation(); 
    myLocationOverlay.disableCompass(); 
    Log.e("Log", "onPause()"); 
} 

// customized the onBackButton 
@Override 
public void onBackPressed() { 
    AlertDialog.Builder builder = new AlertDialog.Builder(this); 
    builder.setTitle("Leave?").setCancelable(false).setMessage("Close the application?").setCancelable(true) 
      .setPositiveButton("Yes", new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int id) { 
        finish(); 
       } 
      }).setNegativeButton("No", null); 
    AlertDialog dialog = builder.create(); 
    dialog.show(); 
} 

@Override 
protected boolean isRouteDisplayed() { 
    return false; 
} 

public void showSearch(View v) { 
    mapView.removeAllViews(); 
    currentView = SEARCH; 
    searchEditTextKey.setText(""); 
    setBackground(searchImageLayout); 
    showFrame(searchMainView); 
} 

public void showMap(View v) { 
    currentView = MAP; 
    setBackground(mapImageLayout); 
    showFrame(mapViewContainer); 
    mapView.setVisibility(View.VISIBLE); 
} 

public void showDiary(View v) { 
    mapView.removeAllViews(); 
    currentView = DIARY; 
    setBackground(diaryImageLayout); 
    showFrame(diaryMainView); 
} 

protected void showFrame(View view) { 
    mainView.setVisibility(View.INVISIBLE); 
    mapView.setVisibility(View.INVISIBLE); 
    mapViewContainer.setVisibility(View.INVISIBLE); 
    diaryMainView.setVisibility(View.INVISIBLE); 
    searchMainView.setVisibility(View.INVISIBLE); 
    view.setVisibility(View.VISIBLE); 
} 

protected void setBackground(LinearLayout layout) { 
    searchImageLayout.setBackgroundResource(R.drawable.buttons); 
    mapImageLayout.setBackgroundResource(R.drawable.buttons); 
    diaryImageLayout.setBackgroundResource(R.drawable.buttons); 
    layout.setBackgroundResource(R.drawable.buttonsdown); 
} 


private boolean doSearch() { 
    String key = searchEditTextKey.getText().toString(); 
    String country = (String) searchTextCountry.getText(); 
    database.connectForReading(); 
    Vector<Park> parks = database.getParks(country, key); 
    database.disconnect(); 
    application.setParkSearch(parks); 
    return parks.size() > 0; 
} 

private void showSearchResult() { 
    Vector<Park> parks = application.getParkSearch(); 
    mapHandler.drawGeopoints(parks); 
    CenterGeoPointCalculator cgpc = new CenterGeoPointCalculator(parks); 
    cgpc.calc(); 
    mapHandler.centerMap(cgpc, getWindowManager().getDefaultDisplay().getRotation()); 
    mapView.getController().animateTo(cgpc.getCenterPoint()); 

} 

public void showCountriesDialog(View v) { 
    searchTextCountry.setTextColor(Color.YELLOW); 
    CountriesAdapter adapter = new CountriesAdapter(MainActivity.this, application.getCountries()); 
    dialog = new CountriesDialog(MainActivity.this, adapter); 
    dialog.show(); 

} 

public void showNoResultDialog() { 
    AlertDialog.Builder builder = new AlertDialog.Builder(this); 
    builder.setMessage("No parks found.\nTry another country or another search key.").setCancelable(false) 
      .setNegativeButton("OK", null); 
    AlertDialog alert = builder.create(); 
    alert.show(); 
} 

private class MessageReceiver extends BroadcastReceiver { 

    @Override 
    public void onReceive(Context context, Intent intent) { 
     String action = intent.getAction(); 
     if (action.equals(CableParkApplication.COUNTRY)) { 
      country = intent.getStringExtra("country"); 
      searchTextCountry.setText(country); 
      String flag = country.toLowerCase().replace(" ", ""); 
      int resId = context.getResources().getIdentifier(flag, "drawable", CableParkApplication.PACKAGE); 
      selectCountryFlag.setImageResource(resId); 
      searchTextCountry.setTextColor(Color.WHITE); 
      dialog.dismiss(); 

     } else if (action.equals(CableParkApplication.COUNTRY)) { 
      searchTextCountry.setTextColor(Color.WHITE); 
      dialog.dismiss(); 

     } else if (action.equals(CableParkApplication.SINGLE_PARK)) { 
      int parkId = intent.getIntExtra("park", -1); 
      if (parkId > 0) { 
       mapView.removeAllViews(); 
       Intent i = new Intent(context, SinglePark.class); 
       i.putExtra("park", parkId); 
       startActivity(i); 
      } 

     } 
    } 
} 

@Override 
protected void onSaveInstanceState(Bundle outState) { 
    Log.e("Log", "onSaveInstanceState()"); 
    super.onSaveInstanceState(outState); 
    if (popupMenu != null) { 
     popupMenu.dismiss(); 
    } 
    outState.putInt(CURRENT_VIEW, currentView); 
    outState.putBoolean(MAP_TYPE, mapType); 
    outState.putString(COUNTRY, (String) searchTextCountry.getText()); 
} 

public void showMapMenu(View v) { 
    mapView.removeAllViews(); 
    popupMenu = new MapPopupMenu(this); 

    final ImageView mapMenuOpen = (ImageView) v.findViewById(R.id.map_menu_open); 
    mapMenuOpen.setImageResource(R.drawable.menu_close); 

    Drawable image = getResources().getDrawable(R.drawable.location); 
    if (mapView.getZoomLevel() < 5 
      || (myLocationOverlay.isMyLocationEnabled() && !mapHandler.isMyLocationVisible(application.getCurrentLocation()))) { 
     MenuEntry myLocation = new MenuEntry(ID_MOVE_TO_ME, "Show", image); 
     popupMenu.addActionItem(myLocation); 

    } else if (myLocationOverlay.isMyLocationEnabled()) { 
     MenuEntry hideLocation = new MenuEntry(ID_DISABLE_LOC, "Hide", image); 
     popupMenu.addActionItem(hideLocation); 

    } else { 
     MenuEntry showLocation = new MenuEntry(ID_ENABLE_LOC, "Show", image); 
     popupMenu.addActionItem(showLocation); 
    } 

    image = getResources().getDrawable(R.drawable.compass); 
    if (myLocationOverlay.isCompassEnabled()) { 
     MenuEntry hideCompass = new MenuEntry(ID_DISABLE_COMP, "Hide", image); 
     popupMenu.addActionItem(hideCompass); 

    } else { 
     MenuEntry showCompass = new MenuEntry(ID_ENABLE_COMP, "Show", image); 
     popupMenu.addActionItem(showCompass); 

    } 

    image = getResources().getDrawable(R.drawable.map_menu); 
    if (mapHandler.getShownMap() == MapHandler.SATELLITE) { 
     MenuEntry showMap = new MenuEntry(ID_SHOW_MAP, "Map", image); 
     popupMenu.addActionItem(showMap); 

    } else { 
     MenuEntry showTraffic = new MenuEntry(ID_SHOW_TRAFFIC, "Hybrid", image); 
     popupMenu.addActionItem(showTraffic); 

    } 

    popupMenu.setAnimStyle(MapPopupMenu.ANIM_GROW_FROM_RIGHT); 

    // Set listener for action item clicked 
    popupMenu.setOnActionItemClickListener(new MapPopupMenu.OnActionItemClickListener() { 

     public void onItemClick(MapPopupMenu source, int pos, int actionId) { 
      switch (actionId) { 
      case ID_DISABLE_COMP: 
       myLocationOverlay.disableCompass(); 
       break; 

      case ID_ENABLE_COMP: 
       myLocationOverlay.enableCompass(); 
       break; 

      case ID_DISABLE_LOC: 
       myLocationOverlay.disableMyLocation(); 
       break; 

      case ID_ENABLE_LOC: 
       myLocationOverlay.enableMyLocation(); 
       mapView.getController().animateTo(application.getCurrentLocation());//line 492 controller seems to be null... 
       break; 

      case ID_SHOW_MAP: 
       mapType = mapHandler.showMap(MapHandler.MAP); 
       break; 

      case ID_SHOW_TRAFFIC: 
       mapType = mapHandler.showMap(MapHandler.SATELLITE); 
       break; 

      case ID_MOVE_TO_ME: 
       myLocationOverlay.enableMyLocation(); 
       mapView.getController().animateTo(application.getCurrentLocation()); 
       mapView.getController().setZoom(MapHandler.MYLOCATION_ZOOM); 
       break; 
      } 
      mapMenuOpen.setImageResource(R.drawable.menu_open); 

     } 
    }); 

    popupMenu.setOnDismissListener(new MapPopupMenu.OnDismissListener() { 

     public void onDismiss() { 
      mapMenuOpen.setImageResource(R.drawable.menu_open); 
     } 
    }); 

    popupMenu.show(v, mapMenuOpen); 
} 

private void hideSoftPad() { 
    InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 
    imm.hideSoftInputFromWindow(searchEditTextKey.getWindowToken(), 0); 
} 


@Override 
protected void onRestart() { 
    mapView.getController().setZoom(zoomLevel); 
    mapView.getController().setCenter(mapCenter); 
    Log.e("Log", "onRestart()"); 
    super.onRestart(); 
}

}

我getCurrentLocation（）方法：

public GeoPoint getCurrentLocation() { 

    // Get the location manager 
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 

    // Define the criteria how to select the locatioin provider -> use 
    // default 
    Criteria criteria = new Criteria(); 
    String provider = locationManager.getBestProvider(criteria, false); 
    Location location = locationManager.getLastKnownLocation(provider); 

    // Initialize the location fields 
    if (location != null) { 
     int lat = (int) (location.getLatitude() * 1E6); 
     int lng = (int) (location.getLongitude() * 1E6); 
     return new GeoPoint(lat, lng); 
    } else { 
     return null; 
    } 
}

...，如果該方法重新變成空，我明白了例外。但是，它怎麼會在我的手機上返回一些東西，而在所有其他手機上都是空的？

來源

2012-07-28 Emaborsa

你可以發佈你的代碼嗎？ – MAC 2012-07-28 11:09:52

我應該發佈哪些代碼？我再說一遍：在我的Galaxy S2上它可以工作。如果我在另一部手機上導出apk，它會崩潰... – Emaborsa 2012-07-28 11:19:26

「因爲mapController in null」 - 不，它不是。您可以通過閱讀堆棧跟蹤來了解這一點。如果您的MapController爲null，則您可能無法執行MapController中的animateTo()方法。 animateTo()是指的是的東西是null。

最可能是nullanimateTo()會抱怨將是傳入的參數值，application.getCurrentLocation()。

來源

2012-07-28 12:16:50 CommonsWare

...也許你是對的。我會做一些檢查。 Thx – Emaborsa 2012-07-28 12:31:44

好吧，現在我明白了（我希望如此）。我正在使用引用GPS的Context.LOCATION_SERVICE。如果手機從未使用GPS，則最後一個已知位置爲空。我應該嘗試與NETWORK_PROVIDER結合使用。對嗎？ – Emaborsa 2012-07-28 12:42:19

@Emaborsa：這可能有幫助，但'getLastKnownLocation（）'完全能夠在任何時候返回'null'。您需要能夠處理該場景而不會崩潰。 – CommonsWare 2012-07-28 13:21:22

爲了顯示你正在導出簽名APK設備映射，那麼你需要使用釋放鍵產生地圖API鍵。

閱讀this教程仔細

來源

2012-07-28 11:12:22 MAC

正如我已經寫過的，在我的手機上它工作....實際上我已經有了我的Api-Key。 – Emaborsa 2012-07-28 11:17:33

如此發佈您的代碼 – MAC 2012-07-28 11:18:44

發佈代碼。我剪掉了一些無用的部分...... – Emaborsa 2012-07-28 11:34:05

[1]首先，在MainActivity聲明你的應用程序作爲全球作爲

public class MainActivity extends MapActivity { 

    public Application application; // <---------- DECLARE IT HERE 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) {

[2]然後宣佈所有其他需要的對象全球

[3]然後把檢查條件線路上無492爲哪個對象它給出的NullPointerException作爲

If(null == mapView) 
    System.out.println("mapView NULL"); 
If(null == application) 
    System.out.println("application NULL");

[4]做出必要的空的改變找到的對象。

來源

2012-07-28 12:02:57

'mapView'和'application'都不是'null'，你可以通過讀取堆棧跟蹤來判斷。 – CommonsWare 2012-07-28 12:17:14

傢伙...我再說一遍：在我的手機上它的作品....我不明白爲什麼它不在別人身上。我認爲地圖有問題，因爲通過從mapView調用MapController出現錯誤。 – Emaborsa 2012-07-28 12:29:08

自己的應用程序的Android地圖沒有顯示

回答

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