android - osmdroid map 不可见

Question

我正在使用 osmdroid 来满足我在 Android 中的映射需求。直到几天前，我还能看到 map ，一切正常，但现在每次我的 map Activity 开始时，我都会得到一张空 map 和以下痕迹:

 08-22 07:47:01.113: WARN/org.osmdroid.tileprovider.modules.MapTileDownloader(470): UnknownHostException downloading MapTile: /10/520/387 : java.net.UnknownHostException: Unable to resolve host "tile.openstreetmap.org": No address associated with hostname
08-22 07:47:01.133: WARN/org.osmdroid.tileprovider.modules.MapTileDownloader(470): UnknownHostException downloading MapTile: /10/516/387 : java.net.UnknownHostException: Unable to resolve host "tile.openstreetmap.org": No address associated with hostname
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470): Tile loader can't continue
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470): org.osmdroid.tileprovider.modules.MapTileModuleProviderBase$CantContinueException: java.net.UnknownHostException: Unable to resolve host "tile.openstreetmap.org": No address associated with hostname
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.osmdroid.tileprovider.modules.MapTileDownloader$TileLoader.loadTile(MapTileDownloader.java:197)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.osmdroid.tileprovider.modules.MapTileModuleProviderBase$TileLoader.run(MapTileModuleProviderBase.java:239)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:574)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at java.lang.Thread.run(Thread.java:1020)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470): Caused by: java.net.UnknownHostException: Unable to resolve host "tile.openstreetmap.org": No address associated with hostname
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at java.net.InetAddress.lookupHostByName(InetAddress.java:496)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:277)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at java.net.InetAddress.getAllByName(InetAddress.java:249)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:136)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     at org.osmdroid.tileprovider.modules.MapTileDownloader$TileLoader.loadTile(MapTileDownloader.java:171)
08-22 07:47:01.284: INFO/org.osmdroid.tileprovider.modules.MapTileModuleProviderBase(470):     ... 4 more

这是我的 onCreate 代码的样子:

    super.onCreate(savedInstanceState);
    this.me = this;
    this.mMapView = new MapView(this, 256);
    //this.mMapView = (MapView) findViewById(R.id.map);

    this.mMapView.setTileSource(TileSourceFactory.MAPNIK);
    this.mMapView.setClickable(true);
    this.mMapView.setBuiltInZoomControls(true);

    this.mMapView.getController().setZoom(10);
    this.mMapView.getController().setCenter(new GeoPoint(39.461078, 2.856445));

    //register BrodCastListener! - remember to unregister!
    IntentFilter filter = new IntentFilter();
    filter.addAction(UpdateRequester.ACTION);
    this.registerReceiver(this.mUpdateReciever, filter);

    //make map seen
    setContentView(this.mMapView);

}

我的 list 文件具有以下权限:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />

<uses-feature android:name="android.hardware.location.network" />
<uses-feature android:name="android.hardware.location.gps"
           android:required="true"/>
<uses-feature android:name="android.hardware.wifi" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

有没有人遇到过这个问题，或者你知道问题出在哪里吗？
奇怪的是它工作得很好，没有任何改变。

这个问题是在使用模拟器时发生的。

解决方案:
我所要做的就是转到项目运行配置(右键单击项目->运行方式->运行配置)，然后转到 android 应用程序，然后转到“目标”选项卡，然后在“其他仿真器命令行选项”下方添加:

-dns-server 8.8.8.8

Answer 1

基本上异常说明它无法解析在线资源。

您确定您的设备已连接到 Wifi 或 3G 网络吗？