在SupportMapFragment中替代使用getMap（）Java Android Studio

Question

我目前正在为我的武术组织开发应用程序。我想要一个使用SupportMapFragment的片段，它显示我的状态下每个武术道场的不同位置。我现在有一个导航抽屉，标题为“位置”。我跟随着Tutsplus的人如何创建他们的Zoo应用程序，并在该应用程序中包含地图。我正在查看的代码是here.在他们的代码和Youtube教程中，他们使用getMap().animateCamera...来控制相机并使地图工作。我已经知道getMap（）已经从Android中删除，而getMapAsync(this)是一个更好的选择，但是我正在努力研究如何将getMapAsync()工作到我的代码中，并且我的代码是如何设置的，我可以使用一些帮助。我浏览了所有Google的文档，并通过本网站上的多个主题进行了阅读，但我没有多少运气。这里是我下面的代码为我LocationFragment.java：

public class LocationFragment extends SupportMapFragment { 

    public static LocationFragment getInstance() { 
     LocationFragment fragment = new LocationFragment(); 

     return fragment; 
    } 
    @Override 
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { 

     super.onViewCreated(view, savedInstanceState); 

     CameraPosition position = CameraPosition.builder() 
       .target(new LatLng(42.921966, -85.718533)) 
       .zoom(16f) 
       .bearing(0.0f) 
       .tilt(0.0f) 
       .build(); 

     getMap().animateCamera(CameraUpdateFactory.newCameraPosition(position), null); 
     getMap().setMapType(GoogleMap.MAP_TYPE_HYBRID); 
     getMap().setTrafficEnabled(true); 

     getMap().getUiSettings().setZoomControlsEnabled(true); 

     MarkerOptions options = new MarkerOptions().position(new LatLng(42.921966, -85.718533)); 
     options.title("KFCOM"); 
     options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE)); 
     getMap().addMarker(options); 

     getMap().setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() { 
      @Override 
      public boolean onMarkerClick(Marker marker) { 
       marker.showInfoWindow(); 
       return true; 
      } 
     }); 

     RestAdapter adapter = new RestAdapter.Builder() 
       .setEndpoint("https://gist.githubusercontent.com/anonymous/101ffbf7e1aed60b7caf7d3d5418bfde/raw/43b5d1fa6862fd1dce84044821cdf1a9d48b6ca2") 
       .build(); 
     PinsApiInterface pinsApiInterface = adapter.create(PinsApiInterface.class); 

     pinsApiInterface.getStreams(new Callback<List<Pin>>() { 
      @Override 
      public void onResponse(Call<List<Pin>> pins, Response<List<Pin>> response) { 
       for(Pin pin : response.body()) { 
        MarkerOptions options = new MarkerOptions().position(new LatLng(pin.getLatitude(), pin.getLongitude())); 
        options.title(pin.getName()); 
        options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)); 
        getMap().addMarker(options); 
       } 
      } 

      @Override 
      public void onFailure(Call<List<Pin>> call, Throwable t) { 

      } 
     }); 
    } 
} 

而下面是我的实例化导航抽屉开关的不同选项卡之间，包括“位置”选项卡主要活动。我包含了所有的代码，因为我不确定是否还需要在主要活动中更改某些内容。在onDrawerSectionItemClickedEvent的代码最底部可以找到片段之间切换的代码。

public class Home extends AppCompatActivity { 

    private DrawerLayout mDrawerLayout; 
    private ActionBarDrawerToggle mActionBarDrawerToggle; 
    private String mCurrentFragmentTitle; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_home); 

     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 
     getSupportActionBar().setDisplayShowHomeEnabled(true); 
     getSupportActionBar().setHomeButtonEnabled(true); 

     mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 

     mActionBarDrawerToggle = new ActionBarDrawerToggle(
       this, 
       mDrawerLayout, 
       R.string.drawer_opened, 
       R.string.drawer_closed) 

     { 
      @Override 
      public void onDrawerOpened(View drawerView) { 
       super.onDrawerOpened(drawerView); 
       if(getSupportActionBar() != null) 
        getSupportActionBar().setTitle(R.string.drawer_opened); 

      } 

      @Override 
      public void onDrawerClosed(View drawerView) { 
       super.onDrawerClosed(drawerView); 
       if(getSupportActionBar() != null) 
        getSupportActionBar().setTitle(R.string.drawer_closed); 
      } 
     }; 

     mDrawerLayout.addDrawerListener(mActionBarDrawerToggle); 

     displayInitialFragment(); 
    } 

    private void displayInitialFragment() { 
     getSupportFragmentManager().beginTransaction().replace(R.id.container, HomeFragment.getInstance()).commit(); 
     mCurrentFragmentTitle = getString(R.string.Home); 
    } 

    @Override 
    public void onPostCreate(Bundle savedInstanceState){ 
     super.onPostCreate(savedInstanceState); 
     mActionBarDrawerToggle.syncState(); 
    } 

    @Override 
    public void onConfigurationChanged(Configuration newConfig) { 
     super.onConfigurationChanged(newConfig); 
     mActionBarDrawerToggle.onConfigurationChanged(newConfig); 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 

     if (mActionBarDrawerToggle.onOptionsItemSelected(item)) 
      return true; 

     return super.onOptionsItemSelected(item); 
    } 

    @Override 
    protected void onStart() { 
     super.onStart(); 
     EventBus.getInstance().register(this); 
    } 

    @Override 
    protected void onStop() { 
     EventBus.getInstance().unregister(this); 
     super.onStop(); 
    } 

    @Subscribe 
    public void onDrawerSectionItemClickedEvent(DrawerSectionItemClickedEvent event) { 
     mDrawerLayout.closeDrawers(); 

     if(event == null || TextUtils.isEmpty(event.section) || event.section.equalsIgnoreCase(mCurrentFragmentTitle)) 
     { 
      return; 
     } 

     Toast.makeText(this, "Home: Section Clicked: " + event.section, Toast.LENGTH_SHORT).show(); 

     if(event.section.equalsIgnoreCase("locations")){ 
      getSupportFragmentManager().beginTransaction().replace(R.id.container, LocationFragment.getInstance()).commit(); 
     } else if (event.section.equalsIgnoreCase("current members")) 
     { 
      getSupportFragmentManager().beginTransaction().replace(R.id.container, MembersFragment.getInstance()).commit(); 
     } else if (event.section.equalsIgnoreCase("home")) 
     { 
      getSupportFragmentManager().beginTransaction().replace(R.id.container, HomeFragment.getInstance()).commit(); 
     } else { 
      return; 
     } 

     mCurrentFragmentTitle = event.section; 
    } 
} 

Answer 1

步骤＃1：有LocationFragment实施OnMapReadyCallback。

第2步：把你所有的当前onViewCreated()逻辑到onMapReady()（由OnMapReadyCallback要求）

第3步：在onViewCreated()，叫getMapAsync(this)