OSMDroid - 地图不显示

Question

我正在尝试在我的应用中加载开放的街道地图。

我的代码如下：

import android.app.Activity;
import android.os.Bundle;

import org.osmdroid.config.Configuration;
import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
import org.osmdroid.views.MapView;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapController;


public class OsmActivity extends Activity {
private MapView         mMapView;
private MapController   mMapController;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_osm);


    Configuration.getInstance().setUserAgentValue(getPackageName());

    mMapView = (MapView) findViewById(R.id.map);
    mMapView.setTileSource(TileSourceFactory.DEFAULT_TILE_SOURCE);
    mMapView.setBuiltInZoomControls(true);
    mMapController = (MapController) mMapView.getController();
    mMapController.setZoom(13);
    GeoPoint gPt = new GeoPoint(51500000, -150000);
    mMapController.setCenter(gPt);
}
}

我正在使用 osmdroid 5.6.5（通过 Maven）。

我根据 osmdroid 文档定义我的用户代理。

Configuration.getInstance().setUserAgentValue(getPackageName());

我有这些 API 设置：

android {
compileSdkVersion 26
defaultConfig {
    applicationId "com.loco_zero.locolizetestsosm"
    minSdkVersion 21
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

拥有这些权限：

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"  />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

我有网格和缩放按钮，但地图不会显示。 我收到这些错误：

I/StorageUtils: /sdcard is NOT writable
I/StorageUtils: /storage/emulated/0 is NOT writable
I/OsmDroid: Using tile source: Mapnik
E/SQLiteLog: (14) cannot open file at line 31278 of [2ef4f3a5b1]
E/SQLiteLog: (14) os_unix.c:31278: (13) open(/storage/emulated/0/osmdroid/tiles/cache.db) - 
E/SQLiteDatabase: Failed to open database '/storage/emulated/0/osmdroid/tiles/cache.db'.
              android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database

D/OsmDroid: Unable to store cached tile from Mapnik /13/4090/2719, database not available.

我做错了什么？ 我可以告诉 OSMDroid 使用 sdcard 文件夹以外的东西吗？

编辑

我添加了以下内容以在运行时获取权限，它成功了：

    if (Build.VERSION.SDK_INT >= 23) {
        if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
            Log.v(TAG, "Permission is granted");
        } else {
            Log.v(TAG, "Permission is revoked");
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
        }
    }

Answer 1

确保您正确启用了运行时权限。您将需要外部存储以及互联网存储。还要检查您的清单权限

Answer 2

@shane 接受的答案为我指明了正确的方向。但是，权限请求发生了变化：

如果从 29 之前的版本迁移，您还必须包含对外部存储的旧权限<application android:requestLegacyExternalStorage="true" ...

Answer 3

这实际上是一个奇怪的情况。 osmdroid 在第一次启动时检测地图切片缓存的最大可写存储位置。如果没有找到，它应该默认为应用程序提供存储。我认为您的情况没有发生这种情况，因为您没有调用它

Configuration.getInstance().load(context, PreferenceManager.getDefaultSharedPreferences(context));

它可能需要在文档中获得更多可见性，但这将启动发现过程。这应该在创建地图视图之前完成。

Answer 4

在此行之前添加以下行setContentView(R.layout.activity_osm);

IConfigurationProvider provider = Configuration.getInstance();
provider.setUserAgentValue(BuildConfig.APPLICATION_ID);
provider.setOsmdroidBasePath(getStorage());
provider.setOsmdroidTileCache(getStorage());

Answer 5

我已经在 kotlin 平台中实现了 OpenStreetMap 下面并且它可以工作。

添加以下行 build.gradle(app level)

implementation 'org.osmdroid:osmdroid-android:6.0.0'

创建 LocationFragment.kt 并粘贴以下代码。

import android.graphics.BitmapFactory
import android.os.Bundle
import android.preference.PreferenceManager
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.app.base.BuildConfig
import com.app.base.base_classes.BaseFragment
import com.google.android.gms.maps.GoogleMap
import org.osmdroid.api.IMapController
import org.osmdroid.config.Configuration
import org.osmdroid.tileprovider.tilesource.TileSourceFactory
import org.osmdroid.views.MapView
import org.osmdroid.views.overlay.mylocation.GpsMyLocationProvider
import org.osmdroid.views.overlay.mylocation.MyLocationNewOverlay

//Replace BaseFragment() with Fragment() class
class LocationFragment : BaseFragment() {

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {

        val view = inflater.inflate(com.app.base.R.layout.fragment_location, container, false)
        val ctx = activity!!.applicationContext
        Configuration.getInstance().load(ctx, PreferenceManager.getDefaultSharedPreferences(ctx));
        Configuration.getInstance().setUserAgentValue(BuildConfig.APPLICATION_ID);
        val map = view.findViewById<MapView>(com.app.base.R.id.mapview)
        map.setUseDataConnection(true)
        //val map = view.findViewById(R.id.map) as MapView
        map.setTileSource(TileSourceFactory.MAPNIK)
        //map.setBuiltInZoomControls(true) //Map ZoomIn/ZoomOut Button Visibility
        map.setMultiTouchControls(true)
        val mapController: IMapController
        mapController = map.getController()

        //mapController.zoomTo(14, 1)
        mapController.setZoom(14)

        val mGpsMyLocationProvider = GpsMyLocationProvider(activity)
        val mLocationOverlay = MyLocationNewOverlay(mGpsMyLocationProvider, map)
        mLocationOverlay.enableMyLocation()
        mLocationOverlay.enableFollowLocation()

        val icon = BitmapFactory.decodeResource(resources, com.app.base.R.drawable.ic_menu_compass)
        mLocationOverlay.setPersonIcon(icon)
        map.getOverlays().add(mLocationOverlay)

        mLocationOverlay.runOnFirstFix {
            map.getOverlays().clear()
            map.getOverlays().add(mLocationOverlay)
            mapController.animateTo(mLocationOverlay.myLocation)
        }
        return view
    }

}

在xml中使用下面的代码

<FrameLayout 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:background="@color/colorWhite"
    tools:context="com.app.base.ui.location.LocationFragment">

    <org.osmdroid.views.MapView
        android:id="@+id/mapview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />

</FrameLayout>