Android Notification by App - Android Discussion Boards

(View) in a parent or ancestor Context for android:onClick attribute defined on view class Button

Vimalsoft(Pty) Ltd30-Aug-17 8:22

30-Aug-17 8:22

Good Day Everyone

I have an activity class defined like this

[Activity(Label = "Activity_Home", MainLauncher = false, Icon = "@drawable/lenderlogo", Theme = "@style/MyTheme")]
    public class Activity_Home : ActionBarActivity //AppCompatActivity
    {

and the activity is hosting a Tab that display its content from a fragment. A fragment is defined separately and it has a button that is defined like this

 <Button
android:textSize="10sp"
android:textColor="#FFF"
android:id="@+id/btn_details_save"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="btn_details_saveClick"
android:text="Continue" />

as you can see i have a click event that is triggered when the button is clicked. The code to handle the event of the button is defined in the fragment class file like this

//Find Controls to hook 
                Button btn_details_save = FindViewById<Button>(Resource.Id.btn_details_save);

                // set onclick listener here, by deleting some process
                btn_details_save.Click += delegate
                {
                    btn_details_saveClick();
                };

and he function itself is defined like this

public void btn_details_saveClick()
        {
             //Do stuff
        }

Now when i run the application, the button is click the button the following error occurs

AndroidRuntime(19059): java.lang.IllegalStateException: Could not find method btn_details_saveClick(View) in a parent or ancestor Context for android:onClick attribute defined on view class Button with id 'btn_details_save'

Please note that this is C# code , which means i am using xamarin ,but the error is Android related not Xamarin.

Thanks

Vuyiswa Maseko,

Spoted in Daniweb-- Sorry to rant. I hate websites. They are just wierd. They don't behave like normal code.

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vimalsoft.com
vuyiswa[at]vimalsoft.com

Re: (View) in a parent or ancestor Context for android:onClick attribute defined on view class Button

David Crow30-Aug-17 11:35

David Crow

30-Aug-17 11:35

My first concern is that you are declaring the click handler twice: once in the layout file, and again in code. Use one or the other, but not both.

Second, you need to change btn_details_saveClick() to accept a View parameter. This is what the error message is actually telling you.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

Re: (View) in a parent or ancestor Context for android:onClick attribute defined on view class Button

Vimalsoft(Pty) Ltd30-Aug-17 12:08

Vimalsoft(Pty) Ltd

30-Aug-17 12:08

Thanks for your reply David

"My first concern is that you are declaring the click handler twice: once in the layout file, and again in code. Use one or the other, but not both."

I thought we have to add the click event on the layout file and add hookup the event to the button also in the initialization of the Activity. i learned, thanks. i am coming from asp.net background

i have changed my function in my frament page to be like this

public void btn_details_saveClick(View  view)
        {

had

 //// set onclick listener here, by deleting some process
//btn_details_save.Click += delegate
//{
//    btn_details_saveClick();
//};

and i ran it and i got the Error

java.lang.IllegalStateException: Could not find a method btn_details_saveClick(View) in the activity class android.support.v7.widget.TintContextWrapper for onClick handler on view class android.support.v7.widget.AppCompatButton with id 'btn_details_save'

i have also have a example project( 9mb) on this link Example Project

To Reproduce the Error
1) Open the drawer

2) Click on loan application and click the button "Continue" and you will get an Error

Thanks

modified 30-Aug-17 18:00pm.

Re: (View) in a parent or ancestor Context for android:onClick attribute defined on view class Button

David Crow31-Aug-17 4:56

David Crow

31-Aug-17 4:56

Does the btn_details_saveClick() method belong to the same class that 'owns' the layout?

Re: (View) in a parent or ancestor Context for android:onClick attribute defined on view class Button

Vimalsoft(Pty) Ltd31-Aug-17 5:00

Vimalsoft(Pty) Ltd

31-Aug-17 5:00

Hi David

Yes it does , i have an example Project (9mb) http://www.3cx.vimalsoft.com/Example_Android_Exception/App10.zip

Re: (View) in a parent or ancestor Context for android:onClick attribute defined on view class Button

David Crow31-Aug-17 5:23

David Crow

31-Aug-17 5:23

If you are defining the click-handler in the .xml file, the click-handler must be implemented in the activity not the fragment. If you are defining the click-handler in the .cs file, the click-handler can be implemented in the fragment.

You'll notice in that example that the btn_details_saveClick() method is contained within the activity PersonalDetailsView rather than the fragment PageFragment.

Re: (View) in a parent or ancestor Context for android:onClick attribute defined on view class Button

Vimalsoft(Pty) Ltd3-Sep-17 11:49

Vimalsoft(Pty) Ltd

3-Sep-17 11:49

Thank you David i fixed the issue

after making the PersonalDetailsView inherit from Fragment, all started to work.

Android Notification by App

Andy_Bell27-Aug-17 7:58

Andy_Bell

27-Aug-17 7:58

Good evening
I need to insert notifications in my Android application. This is something similar to RSS service.
Therefore I have inserted NotificationCompat.Builder, and Pendig Intent to this purpose. When user selects corresponding item the application is restarted and updated.
But I have a problem, I don't have idea how to fire the notification. I'm thinking to start something like a Timer, every 15-30 minutes connect to server and look for new event released. If there is one, I'll fire Notification through the corresponded object.

Is this a best prtacice? Is there any better way to do?

I would appreciate any sugestions.
Thanks a lot.

Re: Android Notification by App

David Crow27-Aug-17 14:00

David Crow

27-Aug-17 14:00

Andy_Bell wrote:
I'm thinking to start something like a Timer, every 15-30 minutes connect to server and look for new event released. If there is one, I'll fire Notification through the corresponded object.

Is the goal for the server itself to notify the app, or for the app to notify itself through the server? If the latter, have you looked at Firebase Cloud Messaging[^]

Re: Android Notification by App

Andy_Bell27-Aug-17 21:59

Andy_Bell

27-Aug-17 21:59

Thanks a lot.
No is the first one. Server should notify news incoming to the app when we have uploaded new articles in our database. So user should be advise.

Re: Android Notification by App

David Crow28-Aug-17 3:05

David Crow

28-Aug-17 3:05

Would an RSS solution work for you?

Re: Android Notification by App

Andy_Bell28-Aug-17 4:40

Andy_Bell

28-Aug-17 4:40

Sorry, why not?

Re: Android Notification by App

Member 1328039729-Aug-17 3:29

Member 13280397

29-Aug-17 3:29

Hello ,

My background service is not working .When device is sleep mode.
My background service is running but not update data in webservice..
Any option and any solution my quistion.plz help me any person .

Hi

Regard
Amit

Re: Android Notification by App

kusuma chowdary22-Sep-17 1:58

kusuma chowdary

22-Sep-17 1:58

If you want to send notification you can use --_FIREBASE_--
It is the best and easiest method which i know upto myknowledge

Using Android class and Xml files as templet

venky.nani9120-Aug-17 21:06

venky.nani91

20-Aug-17 21:06

Hello friends,

i was looking for an idea to implement single android xml and java class file as templet ,to minimise the re-usability of same type of class or xml

Example : I have main.xml which will have 5 buttons on screen ,on first button click i have to load the 2nd screen data from configurator file and based on the configuration the view need to change like hiding 3 buttons or 2 buttons D'Oh! | :doh:

is it possible to achieve ?

Re: Using Android class and Xml files as templet

Richard MacCutchan20-Aug-17 22:55

Richard MacCutchan

20-Aug-17 22:55

venky.nani91 wrote:
is it possible to achieve ?

Probably yes, but it depends on what features are available in the code generator you are using. Visual Studio allows you to create your own project templates; not sure about Android studio.

Re: Using Android class and Xml files as templet

venky.nani9120-Aug-17 23:56

venky.nani91

20-Aug-17 23:56

THANK YOU FOR REPLAY Smile | :)

Re: Using Android class and Xml files as templet

David Crow21-Aug-17 4:59

David Crow

21-Aug-17 4:59

venky.nani91 wrote:

Example : I have main.xml which will have 5 buttons on screen ,on first button click i have to load the 2nd screen data from configurator file and based on the configuration the view need to change like hiding 3 buttons or 2 buttons

is it possible to achieve ?

Yes.

How To Implement Song Repeat On Button Click Android Studio

Member 1334179212-Aug-17 1:06

Member 13341792

12-Aug-17 1:06

Hi, Thanks for your help in helping me answer all my previous questions, really appreciate that.I have another question related to my android development.I am trying to loop my music player to play the same song infinitely on buttonClick. How Should I do that ?I have already written codes to stop the music player upon playback completion, but can't seem to paste a snap of it on the post.Let me know if I should include the snap.
Thanks

Re: How To Implement Song Repeat On Button Click Android Studio

David Crow12-Aug-17 13:13

David Crow

12-Aug-17 13:13

Member 13341792 wrote:
...play the same song infinitely on buttonClick.

Can you put something at the end of the routine (that plays the music file) to check to see if a button has been clicked? If it has, call that routine again.

modified 12-Aug-17 20:28pm.

Moving apps tp sd card.

Randall10229-Aug-17 2:15

Randall1022

9-Aug-17 2:15

I have tried to move apps to ad card from an android phone. I keep getting a new to format code. Never used to happen. Any thoughts?

Re: Moving apps tp sd card.

David Crow9-Aug-17 4:14

David Crow

9-Aug-17 4:14

What does your code look like to do the moving? What has changed since the time it was working?

How To Access Song From SD Card In Android Studio And Make A Playlist out of it

Member 133417926-Aug-17 5:57

Member 13341792

6-Aug-17 5:57

Hi,
I Am coding a music app at the moment.For the app, I would require the app to query the device for all mp3 tracks and then display them,following which I would be able to click on the song title and it would lead me to the playscreen where I would be able to play the song. I have searched through youtube tutorials and websites but to no avail,Hope Someone Could Enlighten me on how to go about this code.Thanks and best regards

Re: How To Access Song From SD Card In Android Studio And Make A Playlist out of it

David Crow7-Aug-17 4:39

David Crow

7-Aug-17 4:39

So which piece of this are you having trouble with?

Have you seen this and this?

modified 7-Aug-17 11:23am.

Re: How To Access Song From SD Card In Android Studio And Make A Playlist out of it

Richard MacCutchan7-Aug-17 7:10

Richard MacCutchan

7-Aug-17 7:10

Take a look at Android Tutorials[^]

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.