调试时授予位置权限，但在android系统上未授予

Question

This is the debugging result for the check of the ACCESS_FINE_LOCATION permission, this means that the permission has been granted for the ACCESS_FINE_LOCATION

Now when I try to use the location service, i don't get any results, so i checked in the android system itself after debugging and found that the permission has not been granted to the location after it was already granted while debugging.

what could be the problem ?

Answer 1

I had the same kind of issue in the past while trying to add runtime permissions to an existing app (unable to get the request dialog to appear...). Code looked good but was unable to get the dialog on a real device.

My issue was that my target SDK was lower than Android 6.0 (API level 23). You need to target at least API level 23 in order to use runtime permission (specified in the first part of this article ).

Not sure if your issue is the same but I hope it could help :)

Answer 2

use this library https://github.com/ParkSangGwon/TedPermission

very useful!!!

Answer 3

For the Android Version >= M , You must ask both Permission - ACCESS_FINE_LOCATION and ACCESS_COARSE_LOCATION to get the location service. A general Runtime Permission asking code:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

    if (ActivityCompat.checkSelfPermission
            (this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
            &&
            ActivityCompat.checkSelfPermission
                    (this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
    {
        requestPermissions(new String[]{
                Manifest.permission.ACCESS_COARSE_LOCATION,
                Manifest.permission.ACCESS_FINE_LOCATION
        }, 1); // 1 is requestCode
        return;

    }
    else{
         //permission already granted enable your location here
    }
}

Handle Request:

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {

    case 1:
        if (grantResults[0] != PackageManager.PERMISSION_GRANTED){
            Toast.makeText(your_activity.this,"PERMISSION_DENIED",Toast.LENGTH_SHORT).show();
          }
          else {
                Toast.makeText(your_activity.this,"PERMISSION_GRANTED",Toast.LENGTH_SHORT).show();
               // permission granted do something
          }
       break;
   }
}

Answer 4

我的问题解决但是我仍然不知道问题出在哪里，如果有人知道请告诉我，解决方案是我使用了一个名为https://github.com/hotchemi/PermissionsDispatcher的库，它请求了许可成功地，它还使用简化代码的注释。