Android：位置服务权限

Posted 2023-04-14

【中文标题】Android：位置服务权限

【英文标题】：Android: Location Service permission

【发布时间】：2017-09-20 21:47:22

【问题描述】：

我从位置管理器访问位置时遇到问题

这是错误

04-24 11:12:10.999 9378-9378/com.example.devandrin.myapplication D/HomeActivity: "network" location provider requires ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permission.

定位函数代码

LocationManager lm = (LocationManager) getSystemService(LOCATION_SERVICE);
    boolean GPS;
    try 
        GPS = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
     catch (Exception e) 
        GPS = false;
    
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo info = cm.getActiveNetworkInfo();
    boolean data = info != null;
    if (!data || !GPS) 
        Utilities.MakeSnack(findViewById(R.id.cLayout), "Unable to get location");
     else 
        try 
            lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1200, 50, new LocationListener() 
                @Override
                public void onLocationChanged(Location location) 

                

                @Override
                public void onStatusChanged(String provider, int status, Bundle extras) 

                

                @Override
                public void onProviderEnabled(String provider) 

                

                @Override
                public void onProviderDisabled(String provider) 

                
            );
            Location l = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            String url = "/setuserlocation/" + sp.getString("userID", "") +
                    "/" + l.getLatitude() +
                    "/" + l.getLongitude();
            StringRequest sr = new StringRequest(StringRequest.Method.GET, url, new Response.Listener<String>() 
                @Override
                public void onResponse(String response) 
                    Utilities.MakeToast(getInstance(), "Location Updated");
                    GregorianCalendar gc = new GregorianCalendar();
                    Date date = gc.getTime();
                    SharedPreferences.Editor e = sp.edit();
                    e.putString("DatePosted", date.toString());
                    e.commit();
                
            , new Response.ErrorListener() 
                @Override
                public void onErrorResponse(VolleyError error) 
                    Utilities.MakeToast(getInstance(), "Location Wasn't updated");
                
            );
            RequestQueueSingleton.getInstance(this).getRequestQueue().add(sr);

         catch (SecurityException e) 
            Log.d("HomeActivity", e.getMessage());
        

    

以及清单中设置的权限

<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />

应用程序的 api 级别是 16，因此我无法在运行时请求权限，并且应用程序不会在安装时请求权限，谁能帮我解决这个问题....

【问题讨论】：

确保权限不在清单中的应用程序标记中，如果可能，请粘贴整个清单

你的 targetSdkVersion 是什么？

@AdeelTurk 这是正确的，因为 Internet 权限正在工作，我有一个 webview，我确定它不是

【参考方案1】：

像这样获得你的运行时权限

    if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) ==
                    PackageManager.PERMISSION_GRANTED &&
                    ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) ==
                            PackageManager.PERMISSION_GRANTED) 
                    // Permission already Granted
                    //Do your work here
//Perform operations here only which requires permission
             else 
                ActivityCompat.requestPermissions(this, new String[]Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, 1);
            

如果尚未授予权限，则覆盖这样的 onRequestPermission 结果

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) 
            if (requestCode == 1) 
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) 
                            //Permission Granted
                            //Do your work here
//Perform operations here only which requires permission
                
            
        

【讨论】：

当我允许权限时它会崩溃，但是当我重新打开时它会正常工作

只有在获得权限时才执行操作。否则会崩溃。将代码放入此条件和 requestPermissionResult 中