android - Osmdroid 在 Android 6.0 上运行不佳

Question

我使用 Osmdroid 4.2 创建了一个 Android 应用程序。一切正常，但在过去的两周里，我在装有 Android 6.0 的 Nexus 设备上发现了问题:OSM map 未加载，你只能在 map 上看到灰色背景。 map block 在 Android 6.0 上不显示。

Answer 1

osmdroid 示例应用最近更新为支持 android m。基本上，您必须向用户询问网络和存储访问的明确权限。

这将引导您了解基础知识 http://developer.android.com/training/permissions/requesting.html

这是相关的 OSMdroid 票证 https://github.com/osmdroid/osmdroid/issues/178

这是要复制并粘贴到您的启动 Activity 中的相关代码。注意，需要 23 个构建工具

导入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
        }
    }
}