Android6.0 WifiManager.getScanResults（）

Question

列表大小为0，这是Android6.0中 WifiManager.getScanResults（）的返回 我已经给了他许可（ACCESS_FINE_LOCATION和ACCESS_COARSE_LOCATION），但是列表的大小仍然是0。 我确定该应用在我的手机设置中有这些权限 - ＆gt;应用。 你知道共鸣吗？任何解决方案？

Answer 1

自Android 6.0起，权限行为已更改为运行时

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED){
   requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                 PERMISSIONS_REQUEST_CODE_ACCESS_COARSE_LOCATION);
    //After this point you wait for callback in onRequestPermissionsResult(int, String[], int[]) overriden method

}else{
    getScanningResults();
   //do something, permission was previously granted; or legacy device
}



@Override
 public void onRequestPermissionsResult(int requestCode, String[] permissions,
         int[] grantResults) {
     if (requestCode == PERMISSIONS_REQUEST_CODE_ACCESS_COARSE_LOCATION
             && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
         // Do something with granted permission
        mWifiListener.getScanningResults();
     }
 }