OnActivityResult not called if not requesting permissions
My app is starting an activity from another package with startActivityForResult
. I observed problems when my launching activity gets recreated and saw that onActivityResult
is not called in that case after the started activity returns. (It is called correctly if I do not trigger activity recreation.)
These are the steps I performed:
- Start my activity
- Click my button which calls
startActivityForResult
on the ykDroid app - Bring my app to background. This causes my activity to be destroyed as I have enabled this in the Android developer settings
- Bring my app back to foreground (I see OnCreate is called)
- Swipe a Yubikey NEO which causes the other activity to return.
- Watch logcat to see that OnActivityResult is not called.
I found out that if I call RequestPermissions
for Permission.UseFingerprint I get the OnActivityResult callback even after activity recreation. I don't have a clue why. Can anybody explain this behavior?
Could it be related to ykDroid? see https://github.com/pp3345/ykDroid for their source code.
Here is what I used for testing (Xamarin Android):
[Activity(Label = "@string/app_name", Theme = "@style/MyTheme")]
public class DatabaseSettingsActivity : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.yubichall_test);
FindViewById<Button>(Resource.Id.btn_yubichall).Click += (sender, args) =>
{
byte challenge64 = new byte[64];
for (int i = 0; i < 64; i++)
{
challenge64[i] = (byte) i;
}
var chalIntent = TryGetYubichallengeIntentOrPrompt(challenge64, true);
StartActivityForResult(chalIntent, 123);
};
//Uncomment this and it will work
/* if ((int)Build.VERSION.SdkInt >= 23)
RequestPermissions(new { Manifest.Permission.UseFingerprint }, 99);*/
}
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
Kp2aLog.Log("OnActivityResult: " + requestCode);
if (resultCode == Result.Ok)
{
byte challengeResponse = data.GetByteArrayExtra("response");
if ((challengeResponse != null) && (challengeResponse.Length > 0))
{
FindViewById<TextView>(Resource.Id.text_result).Text =
MemUtil.ByteArrayToHexString(challengeResponse);
}
}
}
public Intent TryGetYubichallengeIntentOrPrompt(byte challenge, bool promptToInstall)
{
Intent chalIntent = new Intent("net.pp3345.ykdroid.intent.action.CHALLENGE_RESPONSE");
chalIntent.PutExtra("challenge", challenge);
IList<ResolveInfo> activities = PackageManager.QueryIntentActivities(chalIntent, 0);
bool isIntentSafe = activities.Count > 0;
if (isIntentSafe)
{
return chalIntent;
}
if (promptToInstall)
{
//please install https://play.google.com/store/apps/details?id=net.pp3345.ykdroid&hl=en
}
return null;
}
}
where the layout yubicall_test is
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<Button android:id="@+id/btn_yubichall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="yubi challenge"
/>
<TextView
android:id="@+id/text_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
android xamarin.android android-lifecycle
add a comment |
My app is starting an activity from another package with startActivityForResult
. I observed problems when my launching activity gets recreated and saw that onActivityResult
is not called in that case after the started activity returns. (It is called correctly if I do not trigger activity recreation.)
These are the steps I performed:
- Start my activity
- Click my button which calls
startActivityForResult
on the ykDroid app - Bring my app to background. This causes my activity to be destroyed as I have enabled this in the Android developer settings
- Bring my app back to foreground (I see OnCreate is called)
- Swipe a Yubikey NEO which causes the other activity to return.
- Watch logcat to see that OnActivityResult is not called.
I found out that if I call RequestPermissions
for Permission.UseFingerprint I get the OnActivityResult callback even after activity recreation. I don't have a clue why. Can anybody explain this behavior?
Could it be related to ykDroid? see https://github.com/pp3345/ykDroid for their source code.
Here is what I used for testing (Xamarin Android):
[Activity(Label = "@string/app_name", Theme = "@style/MyTheme")]
public class DatabaseSettingsActivity : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.yubichall_test);
FindViewById<Button>(Resource.Id.btn_yubichall).Click += (sender, args) =>
{
byte challenge64 = new byte[64];
for (int i = 0; i < 64; i++)
{
challenge64[i] = (byte) i;
}
var chalIntent = TryGetYubichallengeIntentOrPrompt(challenge64, true);
StartActivityForResult(chalIntent, 123);
};
//Uncomment this and it will work
/* if ((int)Build.VERSION.SdkInt >= 23)
RequestPermissions(new { Manifest.Permission.UseFingerprint }, 99);*/
}
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
Kp2aLog.Log("OnActivityResult: " + requestCode);
if (resultCode == Result.Ok)
{
byte challengeResponse = data.GetByteArrayExtra("response");
if ((challengeResponse != null) && (challengeResponse.Length > 0))
{
FindViewById<TextView>(Resource.Id.text_result).Text =
MemUtil.ByteArrayToHexString(challengeResponse);
}
}
}
public Intent TryGetYubichallengeIntentOrPrompt(byte challenge, bool promptToInstall)
{
Intent chalIntent = new Intent("net.pp3345.ykdroid.intent.action.CHALLENGE_RESPONSE");
chalIntent.PutExtra("challenge", challenge);
IList<ResolveInfo> activities = PackageManager.QueryIntentActivities(chalIntent, 0);
bool isIntentSafe = activities.Count > 0;
if (isIntentSafe)
{
return chalIntent;
}
if (promptToInstall)
{
//please install https://play.google.com/store/apps/details?id=net.pp3345.ykdroid&hl=en
}
return null;
}
}
where the layout yubicall_test is
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<Button android:id="@+id/btn_yubichall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="yubi challenge"
/>
<TextView
android:id="@+id/text_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
android xamarin.android android-lifecycle
If that fixes your issue than why not request permission anyway you have to have runtime permissions in your app!
– G.hakim
Nov 21 '18 at 6:29
because 1.) not everybody has API Level >= 23 2.) it doesn't make sense to request fingerprint permissions if I don't need them 3.) I don't think this will actually solve the problem on all devices 4.) I don't like fixes I do not understand.
– Philipp
Nov 24 '18 at 7:38
add a comment |
My app is starting an activity from another package with startActivityForResult
. I observed problems when my launching activity gets recreated and saw that onActivityResult
is not called in that case after the started activity returns. (It is called correctly if I do not trigger activity recreation.)
These are the steps I performed:
- Start my activity
- Click my button which calls
startActivityForResult
on the ykDroid app - Bring my app to background. This causes my activity to be destroyed as I have enabled this in the Android developer settings
- Bring my app back to foreground (I see OnCreate is called)
- Swipe a Yubikey NEO which causes the other activity to return.
- Watch logcat to see that OnActivityResult is not called.
I found out that if I call RequestPermissions
for Permission.UseFingerprint I get the OnActivityResult callback even after activity recreation. I don't have a clue why. Can anybody explain this behavior?
Could it be related to ykDroid? see https://github.com/pp3345/ykDroid for their source code.
Here is what I used for testing (Xamarin Android):
[Activity(Label = "@string/app_name", Theme = "@style/MyTheme")]
public class DatabaseSettingsActivity : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.yubichall_test);
FindViewById<Button>(Resource.Id.btn_yubichall).Click += (sender, args) =>
{
byte challenge64 = new byte[64];
for (int i = 0; i < 64; i++)
{
challenge64[i] = (byte) i;
}
var chalIntent = TryGetYubichallengeIntentOrPrompt(challenge64, true);
StartActivityForResult(chalIntent, 123);
};
//Uncomment this and it will work
/* if ((int)Build.VERSION.SdkInt >= 23)
RequestPermissions(new { Manifest.Permission.UseFingerprint }, 99);*/
}
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
Kp2aLog.Log("OnActivityResult: " + requestCode);
if (resultCode == Result.Ok)
{
byte challengeResponse = data.GetByteArrayExtra("response");
if ((challengeResponse != null) && (challengeResponse.Length > 0))
{
FindViewById<TextView>(Resource.Id.text_result).Text =
MemUtil.ByteArrayToHexString(challengeResponse);
}
}
}
public Intent TryGetYubichallengeIntentOrPrompt(byte challenge, bool promptToInstall)
{
Intent chalIntent = new Intent("net.pp3345.ykdroid.intent.action.CHALLENGE_RESPONSE");
chalIntent.PutExtra("challenge", challenge);
IList<ResolveInfo> activities = PackageManager.QueryIntentActivities(chalIntent, 0);
bool isIntentSafe = activities.Count > 0;
if (isIntentSafe)
{
return chalIntent;
}
if (promptToInstall)
{
//please install https://play.google.com/store/apps/details?id=net.pp3345.ykdroid&hl=en
}
return null;
}
}
where the layout yubicall_test is
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<Button android:id="@+id/btn_yubichall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="yubi challenge"
/>
<TextView
android:id="@+id/text_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
android xamarin.android android-lifecycle
My app is starting an activity from another package with startActivityForResult
. I observed problems when my launching activity gets recreated and saw that onActivityResult
is not called in that case after the started activity returns. (It is called correctly if I do not trigger activity recreation.)
These are the steps I performed:
- Start my activity
- Click my button which calls
startActivityForResult
on the ykDroid app - Bring my app to background. This causes my activity to be destroyed as I have enabled this in the Android developer settings
- Bring my app back to foreground (I see OnCreate is called)
- Swipe a Yubikey NEO which causes the other activity to return.
- Watch logcat to see that OnActivityResult is not called.
I found out that if I call RequestPermissions
for Permission.UseFingerprint I get the OnActivityResult callback even after activity recreation. I don't have a clue why. Can anybody explain this behavior?
Could it be related to ykDroid? see https://github.com/pp3345/ykDroid for their source code.
Here is what I used for testing (Xamarin Android):
[Activity(Label = "@string/app_name", Theme = "@style/MyTheme")]
public class DatabaseSettingsActivity : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.yubichall_test);
FindViewById<Button>(Resource.Id.btn_yubichall).Click += (sender, args) =>
{
byte challenge64 = new byte[64];
for (int i = 0; i < 64; i++)
{
challenge64[i] = (byte) i;
}
var chalIntent = TryGetYubichallengeIntentOrPrompt(challenge64, true);
StartActivityForResult(chalIntent, 123);
};
//Uncomment this and it will work
/* if ((int)Build.VERSION.SdkInt >= 23)
RequestPermissions(new { Manifest.Permission.UseFingerprint }, 99);*/
}
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
Kp2aLog.Log("OnActivityResult: " + requestCode);
if (resultCode == Result.Ok)
{
byte challengeResponse = data.GetByteArrayExtra("response");
if ((challengeResponse != null) && (challengeResponse.Length > 0))
{
FindViewById<TextView>(Resource.Id.text_result).Text =
MemUtil.ByteArrayToHexString(challengeResponse);
}
}
}
public Intent TryGetYubichallengeIntentOrPrompt(byte challenge, bool promptToInstall)
{
Intent chalIntent = new Intent("net.pp3345.ykdroid.intent.action.CHALLENGE_RESPONSE");
chalIntent.PutExtra("challenge", challenge);
IList<ResolveInfo> activities = PackageManager.QueryIntentActivities(chalIntent, 0);
bool isIntentSafe = activities.Count > 0;
if (isIntentSafe)
{
return chalIntent;
}
if (promptToInstall)
{
//please install https://play.google.com/store/apps/details?id=net.pp3345.ykdroid&hl=en
}
return null;
}
}
where the layout yubicall_test is
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<Button android:id="@+id/btn_yubichall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="yubi challenge"
/>
<TextView
android:id="@+id/text_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
android xamarin.android android-lifecycle
android xamarin.android android-lifecycle
asked Nov 21 '18 at 3:15
PhilippPhilipp
7,081445102
7,081445102
If that fixes your issue than why not request permission anyway you have to have runtime permissions in your app!
– G.hakim
Nov 21 '18 at 6:29
because 1.) not everybody has API Level >= 23 2.) it doesn't make sense to request fingerprint permissions if I don't need them 3.) I don't think this will actually solve the problem on all devices 4.) I don't like fixes I do not understand.
– Philipp
Nov 24 '18 at 7:38
add a comment |
If that fixes your issue than why not request permission anyway you have to have runtime permissions in your app!
– G.hakim
Nov 21 '18 at 6:29
because 1.) not everybody has API Level >= 23 2.) it doesn't make sense to request fingerprint permissions if I don't need them 3.) I don't think this will actually solve the problem on all devices 4.) I don't like fixes I do not understand.
– Philipp
Nov 24 '18 at 7:38
If that fixes your issue than why not request permission anyway you have to have runtime permissions in your app!
– G.hakim
Nov 21 '18 at 6:29
If that fixes your issue than why not request permission anyway you have to have runtime permissions in your app!
– G.hakim
Nov 21 '18 at 6:29
because 1.) not everybody has API Level >= 23 2.) it doesn't make sense to request fingerprint permissions if I don't need them 3.) I don't think this will actually solve the problem on all devices 4.) I don't like fixes I do not understand.
– Philipp
Nov 24 '18 at 7:38
because 1.) not everybody has API Level >= 23 2.) it doesn't make sense to request fingerprint permissions if I don't need them 3.) I don't think this will actually solve the problem on all devices 4.) I don't like fixes I do not understand.
– Philipp
Nov 24 '18 at 7:38
add a comment |
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If that fixes your issue than why not request permission anyway you have to have runtime permissions in your app!
– G.hakim
Nov 21 '18 at 6:29
because 1.) not everybody has API Level >= 23 2.) it doesn't make sense to request fingerprint permissions if I don't need them 3.) I don't think this will actually solve the problem on all devices 4.) I don't like fixes I do not understand.
– Philipp
Nov 24 '18 at 7:38