我使用Osmdroid 4.2创建了一个Android应用.一切正常,但在最近两周内,我在装有Android 6.0的Nexus设备上发现了问题：OSM地图未加载,您在地图上仅看到灰色背景.在Android 6.0上未显示地图拼贴.
解决方法:
osmdroid示例应用程序最近已更新,可支持android m.基本上,您必须向用户询问对网络和存储访问的明确权限.
这将指导您完成基本操作
http://developer.android.com/training/permissions/requesting.html
这是相关的OSMdroid票
https://github.com/osmdroid/osmdroid/issues/178
这是相关代码,可复制并粘贴到您的启动活动中.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
}
}
}
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