问题
I have started to work on Android M runtime permission. Here I am facing the issue that if requestPermissions is called from Dialog Fragment class then onRequestPermissionsResult not getting called in the same Dialog fragment class. But if requestPermissions is called from Activity class or Fragment class then onRequestPermissionsResult method get called in the same class.
Here is my sample code:
public class ContactPickerDialog extends DialogFragment {
private static final int READ_CONTACTS_REQUEST_CODE = 12;
private Context mContext;
private void loadContact() {
if(hasPermission(mContext, Manifest.permission.READ_CONTACTS)){
new ContactSyncTask().execute();
} else {
this.requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, READ_CONTACTS_REQUEST_CODE);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
Logger.d("TAG", "dialog onRequestPermissionsResult");
switch (requestCode) {
case READ_CONTACTS_REQUEST_CODE:
// Check Permissions Granted or not
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
new ContactSyncTask().execute();
} else {
// Permission Denied
Toast.makeText(getActivity(), "Read contact permission is denied", Toast.LENGTH_SHORT).show();
}
break;
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
private static boolean hasPermission(Context context, String permission){
return ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED;
}
}
Here in the code I am calling requestPermissions method of Dialog Fragment class. So I am expecting to get result in same class.
Any help is appreciated. Thanks in advance!
EDIT: Here I am adding more detail, so that it will be more helpful to others. Previously I have used getChildFragmentManager() to show the DialogFragment.
ContactPickerDialog dialog = new ContactPickerDialog();
dialog.show(getChildFragmentManager(), "Contact Picker");
But As @CommonWare asked me to use activity to show the DialogFragment. I have made following changes and it works.
ContactPickerDialog dialog = new ContactPickerDialog();
dialog.show(getActivity().getSupportFragmentManager(), "Contact Picker");
回答1:
There appears to be a bug in Android, where nested fragments do not support the onRequestPermissionsResult() callback. For a DialogFragment, a workaround appears to be to have the fragment wanting to show the dialog call a method on the hosting activity, and the activity shows the DialogFragment itself.
回答2:
If you're inside a Fragment from support library, call requestPermissions() directly, and your Fragment's onRequestPermissionsResult() will be called back.
If you call ActivityCompat.requestPermissions(), then it's the Activity's onRequestPermissionsResult() that will be called back.
回答3:
This issue seems to be fixed in Android Support Library 23.3.0 and above versions.
If you’re using Support v4 Fragments, nested fragments will now receive callbacks to onRequestPermissionsResult().
Edit: @AndrewS, here's how you can update.
In your build.gradle(app) file, change the following line to use the latest support library 24.0.0 which is the latest version:
dependencies {
compile 'com.android.support:appcompat-v7:24.0.0'
}
回答4:
EDIT:
I suggest to use a new version of Support Library 23.3.0, because Google fixed issue with not calling onRequestPermissionsResult, but if for some reasons you need to use an older version, then see origin answer below.
ORIGINAL ANSWER:
I am using next workaround (together with easyPermissions library):
BaseFragment:
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
/** child v4.fragments aren't receiving this due to bug. So forward to child fragments manually
* https://code.google.com/p/android/issues/detail?id=189121
*/
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
List<Fragment> fragments = getChildFragmentManager().getFragments();
if (fragments != null) {
// it is possible that fragment might be null in FragmentManager
for (Fragment fragment : fragments) {
if (fragment != null) {
fragment.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}
}
BaseActivity:
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
Fragment fragment = getSupportFragmentManager().findFragmentById(getFragmentContainer())
if (fragment != null) {
fragment.onRequestPermissionsResult(requestCode&0xff, permissions, grantResults);
}
}
Usage:
public class SomeFragment extends BaseFragment implements EasyPermissions.PermissionCallbacks {
private static final int PICK_CONTACT = 1;
private static final int READ_CONTACTS_PERM = 2;
// some code
@AfterPermissionGranted(READ_CONTACTS_PERM)
private void pickContactWithPermissionsCheck() {
if (EasyPermissions.hasPermissions(getContext(), Manifest.permission.READ_CONTACTS)) {
// Have permission
pickContactForResult();
} else {
// Request one permission
EasyPermissions.requestPermissions(this, getString(R.string.read_contacts_permission_explanation),
READ_CONTACTS_PERM, Manifest.permission.READ_CONTACTS);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
// FIXME problem with incorrect requestCode coming to callback for Nested fragments
// More information here - https://code.google.com/p/android/issues/detail?id=189121
if (isVisible() && Arrays.asList(permissions).contains(Manifest.permission.READ_CONTACTS)) {
requestCode = READ_CONTACTS_PERM;
}
// EasyPermissions handles the request result.
EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
}
}
回答5:
I had this problem without nested fragments, where the activity was showing the dialog fragment and the result was not getting passed.
Adding super.onRequestPermissionsResult(requestCode, permissions, grantResults);
to the Activity's onRequestPermissionsResult() solved the issue.
回答6:
If you have problem with nested fragment, you can request permission from parent fragment
getParentFragment().requestPermissions(new String[]{permission}, requestCode);
and then forward callback to child fragment
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grants) {
List<Fragment> fragments = getChildFragmentManager().getFragments();
if (fragments != null) {
for (Fragment fragment : fragments) {
if (fragment != null) {
fragment.onRequestPermissionsResult(requestCode, permissions, grants);
}
}
}
}
回答7:
One thing that helped me was this. When you request permission from a nested fragment use getParent like so
fragment.getParentFragment().requestPermissions((new String[]
{Manifest.permission.READ_CONTACTS}), requestCode);
and then override the parent fragment onRequestPermissionResult and check for the corresponding requestCode.
Hope it helps you as well.
回答8:
If you have a look at the documentation of the fragment's requestPermissions method you will find out that you still have to declare the permissions in your Manifest:
If this is not the case the fragment's own onRequestPermissionsResult won't be invoked.
Instead, the activity's onRequestPermissionsResult is called but won't have any effect.
So grating a permission from within a fragment should be done as follows:
1. Declare the permission in your manifest
<uses-permission android:name="android.permission.CAMERA"/>
Enter this before the application tag.
2. Check for the permission in your fragment
if (ActivityCompat.checkSelfPermission(context, permission)
!= PackageManager.PERMISSION_GRANTED) {
requestPermissions(
arrayOf(Manifest.permission.CAMERA),
REQUEST_CODE_CAMERA_PERMISSION)
}
3. Wait for the permission result in your fragment
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
when (requestCode) {
REQUEST_CODE_CAMERA_PERMISSION -> {
val granted = grantResults.isNotEmpty()
&& permissions.isNotEmpty()
&& grantResults[0] == PackageManager.PERMISSION_GRANTED
&& !ActivityCompat.shouldShowRequestPermissionRationale(activity, permissions[0])
when (granted) {
true -> openCamera()
else -> proceedWithoutPermission()
}
}
}
4. Make sure you don't override the activity's onRequestPermissionsResult
Overriding the activity's onRequestPermissionsResult will cause the fragment's one not to react.
回答9:
I got it done like this
public class DialogFragmentSMS extends DialogFragment implements View.OnClickListener {
public static DialogFragmentSMS frag;
private static View view;
private static ViewGroup parent;
private EditText editTextMensagem;
private String celular;
private final static int SMS_REQUEST = 20;
public DialogFragmentSMS() {
}
public static DialogFragmentSMS newInstance(String celular)
{
Bundle args = new Bundle();
args.putString("celular", celular);
frag = new DialogFragmentSMS();
frag.setArguments(args);
return frag;
}
@Override
public void onCreate(Bundle saveInstaceState)
{
super.onCreate(saveInstaceState);
}
@Override
public void onClick(View v) {
if (!PermissaoUtils.hasPermission(getActivity(), Manifest.permission.SEND_SMS)) {
//PermissaoUtils.requestPermissions(getActivity(), new String[]{Manifest.permission.SEND_SMS}, SMS_REQUEST);
frag.requestPermissions(new String[]{Manifest.permission.SEND_SMS}, SMS_REQUEST);
}else{
if (validaCampos()) {
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage("0" + celular, null, editTextMensagem.getText().toString(), null, null);
Toast.makeText(getActivity(), R.string.sms_enviado, Toast.LENGTH_SHORT).show();
getDialog().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
frag.dismiss();
}
}
}
My Class Permission
public class PermissaoUtils
{
public static boolean useRunTimePermissions() {
return Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP_MR1;
}
public static boolean hasPermission(Activity activity, String permission) {
if (useRunTimePermissions()) {
return activity.checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED;
}
return true;
}
public static void requestPermissions(Activity activity, String[] permission, int requestCode) {
if (useRunTimePermissions()) {
activity.requestPermissions(permission, requestCode);
}
}
}
回答10:
In addition to the end portion of Nino Handler's answer and for anyone still having issues with this, make sure that if you do override onRequestPermissionsResult in the parent activity/fragment of your dialog fragment, that you call super.onRequestPermissionsResult there.
I was overriding onRequestPermissionsResult in the parent activity of my dialog fragment, but neglected to call the super method there. Once I changed it to call the super method, it properly delegated down to the onRequestPermissionsResult in my dialog fragment.
来源：https://stackoverflow.com/questions/33169455/onrequestpermissionsresult-not-being-called-in-dialog-fragment