Hi all,
we are currently developing our next app and experience a very strange
problem: Whenever we execute "ActivityCompat.requestPermissions" the app
shows the request dialog but at the same time the screen becomes white. The
dialog stays until an answer is selected and afterwards the screen stays
white. Additionally, the onRequestPermissionsResult method is NOT called.
When pressing the screen, nothing happens. When pressing the back button,
the app crashes. When restarting the app, the selection about the
permission is remembered.
The main problem is that we do not get any exception or unexpected messages
(and of course the app should not show a white screen - indeed nothing
should happen except that the missing persmission is requested). We also
searched for a solution but did not find any similar posts (only some
people saying that the permission has to be listed in the manifest which it
is).
Did anyone before experience such a problem? We implemented the new
permission model several times before but never experiences such a
behaviour. Since no errors or logs are generated we do not know how to
trace the source of the problem.
Thanks for any help,
Thomas
*We want to get the GPS coordinates of the user (which he or she initiiated
by clicking an image button). We check for the permission in the
onClick-method:*
*private class GPSOnClickListener implements View.OnClickListener{
private final LocationActivity source; public
GPSOnClickListener(LocationActivity source) { this.source =
source; } @Override public void onClick(View v) { if
(checkAndAskForPermission(source, new
String[]{Manifest.permission.ACCESS_FINE_LOCATION},getString(R.string.activity_download_permission_internet_request),
PermissionRequests.ACTIVITY_DOWNLOAD_LOCATION_ACCESS_REQUEST)) {
getDialogHelper().showSpinnerProgressDialog(getString(R.string.activity_location_progressdialog_position_message));
positionHelper.startSeekingPosition(); } else
Log.d(this.getClass().getName(),"Could not locate, missing
permission..."); }}*The method checking and asking for the permission:
public boolean checkAndAskForPermission(Activity activity, String[]
permissions, String explanation, int permissionId)
{
Log.d(this.getClass().getName(), "Checking permissions for " +
Arrays.asList(permissions));
ArrayList<String> permList = new ArrayList<>();
for (String perm: permissions)
{
if (ActivityCompat.checkSelfPermission(this, perm) !=
PackageManager.PERMISSION_GRANTED)
permList.add(perm);
if (ActivityCompat.shouldShowRequestPermissionRationale(this, perm)) {
Log.d(this.getClass().getName(),"Showing dialog to explain
permission: "+perm);
this.getDialogHelper().showAlertDialog(getString(R.string.app_permissions_title),
explanation, null);
}
}
if (permList.size() == 0)
{
Log.d(this.getClass().getName(), "Permissions already granted!");
return true;
}
else
{
Log.d(this.getClass().getName(), "Missing permissions. Requesting " +
permList);
ActivityCompat.requestPermissions(activity,permList.toArray(new
String[permList.size()]), permissionId);
Log.d(this.getClass().getName(), "Missing permissions. Requested
"+permList);
return false;
}
}
The method that should get the response:
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[],
int[] grantResults)
{
switch (requestCode) {
case PermissionRequests.ACTIVITY_DOWNLOAD_LOCATION_ACCESS_REQUEST:
{
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] ==
PackageManager.PERMISSION_GRANTED) {
getDialogHelper().showSpinnerProgressDialog(getString(R.string.activity_location_progressdialog_position_message));
positionHelper.startSeekingPosition();
} else
{
getDialogHelper().showAlertDialog(getString(R.string.errordialog_title),
getString(R.string.activity_location_errordialog_position_message_denied),
null);
}
return;
}
}
}
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