Google Maps API v2 - Android Runtime在添加标记时关闭

Question

A有一个相当简单的视图，其中包含一个MapView。一切工作正常，直到我尝试从哈希映射添加位置的标记。有一个真正的bizzare调试消息，虚拟机关闭，屏幕变黑。没有例外。我正在Google Nexus 7 2013，Android 5上进行测试。有没有人遇到类似的情况？

DebugActivity.java

package com.katasonov.everporter; 



public class DebugActivity extends ActionBarActivity implements OnMapReadyCallback { 

    static final String TAG = "DebugActivity"; 
    TextView mLogView; 
    MapView mMapView; 
    GoogleMap mMap; 
    int mLogSize = 0; 

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

     TextView versionName = (TextView) findViewById(R.id.versionName); 

     try { 
      PackageInfo packageInfo = getPackageManager().getPackageInfo(getPackageName(), 0); 
      versionName.setText(packageInfo.versionName); 
     } catch (PackageManager.NameNotFoundException e) { 
      // should never happen 
      throw new RuntimeException("Could not get package name: " + e); 
     } 

     mLogView = (TextView) findViewById(R.id.logView); 
     mLogView.setMovementMethod(new ScrollingMovementMethod()); 
     mLogView.setFocusable(false); 

     try { 
      CSVReader logReader = new CSVReader(new FileReader(new File(getFilesDir(), "locations.csv")), ','); 
      String [] nextLine; 
      while ((nextLine = logReader.readNext()) != null) { 
       // nextLine[] is an array of values from the line 
       mLogView.append(StringUtils.join(nextLine, ", ") + "\n"); 
       mLogSize++; 
      } 
      logReader.close(); 
     } catch (IOException e) { 
      Log.e(TAG, e.toString()); 
     } 

     TextView logSize = (TextView) findViewById(R.id.logSize); 
     logSize.setText(String.valueOf(mLogSize)); 

     // map view initialization 
     mMapView = (MapView) findViewById(R.id.mapView); 
     mMapView.onCreate(savedInstanceState); 
     mMapView.getMapAsync(this); 
    } 

    // Gets to GoogleMap from the MapView and does initialization stuff 
    @Override 
    public void onMapReady(GoogleMap map) { 
     mMap = map; 

     // a list of markers 
     HashMap<String, Integer> markers = new HashMap<>(); 
     try { 
      CSVReader logReader = new CSVReader(new FileReader(new File(getFilesDir(), "locations.csv")), ','); 
      String [] nextLine; 
      while ((nextLine = logReader.readNext()) != null) { 
       // nextLine[] is an array of values from the line 
       String key = nextLine[3] + ":" + nextLine[2]; 
       // check if the key exists already 
       if (!markers.containsKey(key)) { 
        markers.put(key, 1); 
       } else { 
        Integer val = markers.get(key); 
        val++; 
        markers.put(key, val); 
       } 
      } 
      logReader.close(); 
     } catch (IOException e) { 
      Log.e(TAG, e.toString()); 
     } 

     // iterate over markers and create them on the map 
     Set<String> keys = markers.keySet(); //get all keys 
     String[] lastLoc = null; 
     double lat, lon; 
     for(String key: keys) { 
      String[] values = key.split(":"); 
      lastLoc = values; 
      lat = Double.parseDouble(values[0]); 
      lon = Double.parseDouble(values[1]); 
      Log.d(TAG, "Creating marker for " + String.valueOf(lat) + ", " + String.valueOf(lon)); 
      map.addMarker(new MarkerOptions() 
        .title(markers.get(key) + " locations") 
        .position(new LatLng(lat, lon))); 
     } 

     map.setMyLocationEnabled(false); 
     if (lastLoc != null) { 
      map.moveCamera(CameraUpdateFactory.newLatLngZoom(
        new LatLng(Double.parseDouble(lastLoc[0]), Double.parseDouble(lastLoc[1])), 13)); 
     } 
    } 

    @Override 
    protected void onDestroy() { 
     super.onDestroy(); 
     mMapView.onDestroy(); 
    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
     mMapView.onResume(); 
    } 

    @Override 
    protected void onPause() { 
     super.onPause(); 
     mMapView.onPause(); 
    } 

    @Override 
    protected void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     mMapView.onSaveInstanceState(outState); 
    } 

    @Override 
    public void onLowMemory() { 
     super.onLowMemory(); 
     mMapView.onLowMemory(); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_debug, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_push_log_to_server) { 
      Intent serviceIntent = new Intent(this, LocationService.class); 
      serviceIntent.putExtra("uploadLogFile", true); 
      startService(serviceIntent); 
      finish(); 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
} 

activity_debug.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    tools:context=".DebugActivity" 
    android:orientation="vertical"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:text="Version Name" 
     android:id="@+id/versionName" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:attr/textAppearanceMedium" 
     android:text="Log Size" 
     android:id="@+id/logSize" /> 

    <com.google.android.gms.maps.MapView android:id="@+id/mapView" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" /> 

    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/logView" 
     android:enabled="true" 
     android:maxLines = "25" 
     android:scrollbars="vertical" 
     android:scrollbarStyle="insideOverlay" /> 

</LinearLayout> 

从logcat的

03-31 17:41:23.157 15138-15138/com.katasonov.everporter I/x﹕ Making Creator dynamically 
03-31 17:41:23.162 15138-15138/com.katasonov.everporter W/ResourcesManager﹕ Asset path '/system/framework/com.android.media.remotedisplay.jar' does not exist or contains no resources. 
03-31 17:41:23.163 15138-15138/com.katasonov.everporter W/ResourcesManager﹕ Asset path '/system/framework/com.android.location.provider.jar' does not exist or contains no resources. 
03-31 17:41:23.183 15138-15138/com.katasonov.everporter I/Google Maps Android API﹕ Google Play services client version: 6587000 
03-31 17:41:23.195 15138-15138/com.katasonov.everporter I/Google Maps Android API﹕ Google Play services package version: 7099436 
03-31 17:41:23.883 15138-15138/com.katasonov.everporter D/DebugActivity﹕ Creating marker for 49.22522522522522, 28.416659753499335 
03-31 17:41:23.893 15138-15138/com.katasonov.everporter D/AndroidRuntime﹕ Shutting down VM 
03-31 17:41:55.281 15138-15147/com.katasonov.everporter I/art﹕ Thread[5,tid=15147,WaitingInMainSignalCatcherLoop,Thread*=0xaf60e400,peer=0x32c07080,"Signal Catcher"]: reacting to signal 3 
03-31 17:41:55.281 15138-15147/com.katasonov.everporter I/art﹕ [ 03-31 17:41:55.481 534: 556 I/Process ] 
    Sending signal. PID: 534 SIG: 3 

Answer 1

一块好的，我会在24小时内回答我自己的问题！ 显然，即使Google Maps for Android docs说，你应该做下列操作之一，以确保CameraUpdateFactory初始化：

此前使用从这个类的任何方法，你必须做的 之一以下，以确保此类已初始化：

• 等待谷歌地图从您添加到应用程序的MapFragment或MapView 。您可以通过调用getMap（）方法并检查 返回的对象是否为空来验证GoogleMap是否可用。
• 调用初始化（上下文）。由于 只要不抛出GooglePlayServicesNotAvailableException，所以此类 将被正确初始化。

现实情况是，你需要做的第二，即使你已经有（）传递到异步调用onMapReady一个非空GoogleMap对象。所以，当我加入

MapsInitializer.initialize(this); 

map.moveCamera 

它开始预期:)享受工作之前！