Osmdroid在Android 6.0上效果不佳

Question

我使用Osmdroid 4.2創建了一個Android應用程序。一切工作正常，但在過去的兩週內，我看到與Android 6.0的Nexus設備上的問題：OSM地圖不加載，你只能看到地圖上的灰色背景。 Android 6.0上未顯示地圖。

Answer 1

osmdroid示例應用程序最近更新爲android m支持。基本上你必須要求用戶具有明確的網絡和存儲訪問權限。

這將引導您完成基本 http://developer.android.com/training/permissions/requesting.html

此相關的OSMdroid票 https://github.com/osmdroid/osmdroid/issues/178

這是相關的代碼複製並粘貼到你的啓動後續活動。注意，需要23個構建工具

import java.util.ArrayList;

import android.Manifest; 
import android.app.ListActivity; 
import android.content.Intent; 
import android.content.pm.PackageManager; 
import android.os.Bundle; 
import android.support.v4.app.ActivityCompat; 
import android.support.v4.content.ContextCompat; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 
import android.widget.Toast; 

import org.osmdroid.MapActivity; 

public class SampleLoader extends ListActivity { 
    // =========================================================== 
    // Constants 
    // =========================================================== 

    // =========================================================== 
    // Fields 
    // =========================================================== 

    final int INTERNET=1; 
    final int NETSTATE=2; 
    final int LOCATION=3; 
    final int LOCATIONC=4; 
    final int WIFI=5; 
    final int STORAGE=6; 
    // =========================================================== 
    // Constructors 
    // =========================================================== 

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

     // Assume thisActivity is the current activity 
     int permissionCheck = ContextCompat.checkSelfPermission(this, 
       Manifest.permission.INTERNET); 
     if (permissionCheck != PackageManager.PERMISSION_GRANTED){ 
      // Should we show an explanation? 
      if (ActivityCompat.shouldShowRequestPermissionRationale(this, 
        Manifest.permission.INTERNET)) { 

       // Show an expanation to the user *asynchronously* -- don't block 
       // this thread waiting for the user's response! After the user 
       // sees the explanation, try again to request the permission. 
       Toast.makeText(this, "Need internet access to get map tiles if working with online sources", Toast.LENGTH_LONG).show(); 

      } else { 

       // No explanation needed, we can request the permission. 

       ActivityCompat.requestPermissions(this, 
         new String[]{Manifest.permission.INTERNET}, 
         INTERNET); 
      } 
     } 

     permissionCheck = ContextCompat.checkSelfPermission(this, 
       Manifest.permission.ACCESS_NETWORK_STATE); 

     if (permissionCheck != PackageManager.PERMISSION_GRANTED){ 
      // Should we show an explanation? 
      if (ActivityCompat.shouldShowRequestPermissionRationale(this, 
        Manifest.permission.ACCESS_NETWORK_STATE)) { 

       // Show an expanation to the user *asynchronously* -- don't block 
       // this thread waiting for the user's response! After the user 
       // sees the explanation, try again to request the permission. 
       Toast.makeText(this, "Need to check network state", Toast.LENGTH_LONG).show(); 

      } else { 

       // No explanation needed, we can request the permission. 

       ActivityCompat.requestPermissions(this, 
         new String[]{Manifest.permission.ACCESS_NETWORK_STATE}, 
         NETSTATE); 

      } 
     } 

     permissionCheck = ContextCompat.checkSelfPermission(this, 
       Manifest.permission.ACCESS_FINE_LOCATION); 
     if (permissionCheck != PackageManager.PERMISSION_GRANTED){ 
      // Should we show an explanation? 
      if (ActivityCompat.shouldShowRequestPermissionRationale(this, 
        Manifest.permission.ACCESS_FINE_LOCATION)) { 

       // Show an expanation to the user *asynchronously* -- don't block 
       // this thread waiting for the user's response! After the user 
       // sees the explanation, try again to request the permission. 
       Toast.makeText(this, "Need your location to place an icon on the map", Toast.LENGTH_LONG).show(); 

      } else { 

       // No explanation needed, we can request the permission. 

       ActivityCompat.requestPermissions(this, 
         new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 
         LOCATION); 

      } 
     } 

     permissionCheck = ContextCompat.checkSelfPermission(this, 
       Manifest.permission.ACCESS_COARSE_LOCATION); 
     if (permissionCheck != PackageManager.PERMISSION_GRANTED){ 
      // Should we show an explanation? 
      if (ActivityCompat.shouldShowRequestPermissionRationale(this, 
        Manifest.permission.ACCESS_COARSE_LOCATION)) { 

       // Show an expanation to the user *asynchronously* -- don't block 
       // this thread waiting for the user's response! After the user 
       // sees the explanation, try again to request the permission. 
       Toast.makeText(this, "Need your location to place an icon on the map", Toast.LENGTH_LONG).show(); 

      } else { 

       // No explanation needed, we can request the permission. 

       ActivityCompat.requestPermissions(this, 
         new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 
         LOCATIONC); 

      } 
     } 

     permissionCheck = ContextCompat.checkSelfPermission(this, 
       Manifest.permission.ACCESS_WIFI_STATE); 
     if (permissionCheck != PackageManager.PERMISSION_GRANTED){ 
      // Should we show an explanation? 
      if (ActivityCompat.shouldShowRequestPermissionRationale(this, 
        Manifest.permission.ACCESS_WIFI_STATE)) { 

       // Show an expanation to the user *asynchronously* -- don't block 
       // this thread waiting for the user's response! After the user 
       // sees the explanation, try again to request the permission. 
       Toast.makeText(this, "Access WIFI state", Toast.LENGTH_LONG).show(); 

      } else { 

       // No explanation needed, we can request the permission. 

       ActivityCompat.requestPermissions(this, 
         new String[]{Manifest.permission.ACCESS_WIFI_STATE}, 
         WIFI); 

      } 
     } 

     permissionCheck = ContextCompat.checkSelfPermission(this, 
       Manifest.permission.WRITE_EXTERNAL_STORAGE); 
     if (permissionCheck != PackageManager.PERMISSION_GRANTED){ 
      // Should we show an explanation? 
      if (ActivityCompat.shouldShowRequestPermissionRationale(this, 
        Manifest.permission.WRITE_EXTERNAL_STORAGE)) { 

       // Show an expanation to the user *asynchronously* -- don't block 
       // this thread waiting for the user's response! After the user 
       // sees the explanation, try again to request the permission. 
       Toast.makeText(this, "We store tiles to your devices storage to reduce data usage and for reading offline tile stores", Toast.LENGTH_LONG).show(); 

      } else { 

       // No explanation needed, we can request the permission. 

       ActivityCompat.requestPermissions(this, 
         new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 
         STORAGE); 

      } 
     } 

    } 

    @Override 
    public void onRequestPermissionsResult(int requestCode, 
              String permissions[], int[] grantResults) { 
     switch (requestCode) { 
      case INTERNET:{ 
       // If request is cancelled, the result arrays are empty. 
       if (grantResults.length > 0 
         && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        // permission was granted, yay! 
       } else { 
        // permission denied, boo! Disable the 
        // functionality that depends on this permission. 
        Toast.makeText(this,"Online map sources will be unavailable", Toast.LENGTH_LONG).show(); 
       } 
       return; 
      } 
      case NETSTATE: { 
       // If request is cancelled, the result arrays are empty. 
       if (grantResults.length > 0 
         && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        // permission was granted, yay! 
       } else { 
        // permission denied, boo! Disable the 
        // functionality that depends on this permission. 
        Toast.makeText(this,"Online map sources will be unavailable", Toast.LENGTH_LONG).show(); 
       } 
       return; 
      } 
      case LOCATION:{ 
       // If request is cancelled, the result arrays are empty. 
       if (grantResults.length > 0 
         && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        // permission was granted, yay! 
       } else { 
        // permission denied, boo! Disable the 
        // functionality that depends on this permission. 
        Toast.makeText(this,"My location will be unavailable via GPS", Toast.LENGTH_LONG).show(); 
       } 
       return; 
      } 
      case LOCATIONC: 
      { 
       // If request is cancelled, the result arrays are empty. 
       if (grantResults.length > 0 
         && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        // permission was granted, yay! 
       } else { 
        // permission denied, boo! Disable the 
        // functionality that depends on this permission. 
        Toast.makeText(this,"My location will be unavailable via Network providers", Toast.LENGTH_LONG).show(); 
       } 
       return; 
      } 
      case STORAGE:{ 
       // If request is cancelled, the result arrays are empty. 
       if (grantResults.length > 0 
         && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        // permission was granted, yay! 
       } else { 
        // permission denied, boo! Disable the 
        // functionality that depends on this permission. 
        Toast.makeText(this,"Offline map data and caching will be unavailable", Toast.LENGTH_LONG).show(); 
       } 
       return; 
      } 
      case WIFI:{ 
       // If request is cancelled, the result arrays are empty. 
       if (grantResults.length > 0 
         && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 

        // permission was granted, yay! 


       } else { 

        // permission denied, boo! Disable the 
        // functionality that depends on this permission. 
        Toast.makeText(this,"Data usage may not be optimized.", Toast.LENGTH_LONG).show(); 

       } 
       return; 
      } 

      // other 'case' lines to check for other 
      // permissions this app might request 
     } 
    } 
}