I am testing the permission system on the Android M Dev Preview. I have a question about the callback function. The Activity class has a new API:
public void onRequestPermissionsResult (int requestCode,
String[] permissions, int[] grantResults) { }
I want to ask why are permissions and grantResults arguments defined as arrays ? I know that multiple permissions can be asked at the same time using requestPermissions()
, but if a request code is used for a permission set of request, wouldn't it suffice to just have an integer grantResults (not sure about permissions argument) ?
Work for me
Check and Request for permission
if ( ContextCompat.checkSelfPermission( this, android.Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
android.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.
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION },
MY_PERMISSIONS_REQUEST_ACCESS_LOCATION);
// MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
// app-defined int constant. The callback method gets the
// result of the request.
}
return;
}
Callback
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_ACCESS_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
moveToNextActivity();
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
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