Android content activitynotfoundexception unable to find explicit activity class

i have a challenge in making this to work in a Fragment

«One man’s wage rise is another man’s price increase.» — Harold Wilson

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

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

«One man’s wage rise is another man’s price increase.» — Harold Wilson

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

There is no Exception , the Context is the Application Context (Context.Android.Support.V4.App.Fragment.Context) , i also tried to declare the context at a fragment level and initialize it on OnCreateView (Android.Content.Context) but still it does not show the dialog.

Please note this dialog shows nicely in an Activity not a Fragment.

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

There is no Exception.

You know this, even without a try/catch block?

, the Context is the Application Context (Context.Android.Support.V4.App.Fragment.Context) , i also tried to declare the context at a fragment level and initialize it on OnCreateView (Android.Content.Context) but still it does not show the dialog.

Have you tried using getActivity() when constructing the ProgressDialog ?

Please note this dialog shows nicely in an Activity not a Fragment.

«One man’s wage rise is another man’s price increase.» — Harold Wilson

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

Have you tried using getActivity() when constructing the ProgressDialog?

let me try that and i will get back to you.

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

If I put those calls in the activity, I get one request dialog asking for permission, and because requestPermissions() runs synchronously in a separate thread, the two fragments are allowed to finish their creation in the main thread. Once permission is granted, the activity sends both fragments a message indicating they can now populate their ListView s. This works fine, until I restart the app. Since permission has now been granted, requestPermissions() does not run, and the message that the activity sends to the fragments gets there before the fragments have been fully created. Just to see what would happen, I preceded the message with a 1-second sleep and that gave the fragments enough time to finish their creation. This works fine for both a first-time and restarted app. I did not like this approach because of the delay, so I kept looking.

If I put those calls in each fragment, I get two requests asking for permission. I can grant permission to neither, one or the other, or both, and the fragments will respond accordingly. The obvious problem is the two request dialogs. I could not find the proper way of having one fragment communicate to the other that it has already sought permission and that a second request is not necessary.

Another thing I tried was to put a call to checkSelfPermission() in each fragment’s onActivityCreated() method to continuously poll the desired permission. The call to requestPermission() was still done once in the activity. Once the permission was granted, each fragment would then go about populating its ListView . This worked, but it still felt wrong given the pausing and polling each fragment was having to do.

I feel my first approach is the proper way to go, but cannot find a suitable solution to the timing issue. I found out a long time ago when doing Windows development that inserting code to slow down or speed up your program’s execution is a major recipe for disaster. Better to signal events instead. So far I’m unable to find a comparable solution in either Java or Android.

Any helpful suggestions?

«One man’s wage rise is another man’s price increase.» — Harold Wilson

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

From my AppCompatActivity class i am trying to open an activity as an intent like this

and my package name in the manifest is package=»com.vimalsoft.toletsa» . My assembly name is Toletsa and my namespace is Toletsa

The layout file for my Activity that i want to open as an intent is

when i run the project i get an error when starting the activity

Unhandled Exception:
Android.Content.ActivityNotFoundException: Unable to find explicit activity class ; have you declared this activity in your AndroidManifest.xml?

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

i was able to resolve the issue i just changed this

in my Manifest to

and this solved my problem , the code was ok

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

Type «Android chat» into Google and you will find all the information you need.

Before to start building a chat app you need to focus on both Client and Server separately. Technology stack behind the Android chat application are

Server : Ejabberd
Language : Erlang
Protocol : XMPP
Database management : Mnesia & Mysql
Multimedia files storage : YAWS
Operating system : FreeBSD

java.sql.SQLException: Unknown server host name ‘Unable to resolve host’

getting above problem.

Tell me steps, hoe to connect to sql server.

The error message is quite clear, your host name either does not exist or cannot be reached from the client system.

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

I have a super simple php script that runs successfully when I paste the url into a browser (windows, chrome).

My php code has values hardcoded in it and these values are successfully inserted into mySql database (running on a WAMP).
At this point EVERYTHING is hardcoded in the php.
I appreciate any help, I think I am missing something fundamental (new to android development).

Problem:
I can not access/run this same script from my andoroid app. Do I need to run it async? I simply have the below code in a function that is run when the button is clicked on the phone (using an emulator so phone displays app while I am in debug mode in Android.)

Clues:
It bombs out on the last line. Strangely debug (IOException) value is blank.
Manifest has:

*************Code Snippet
URL url;
HttpURLConnection connection = null;
url = new URL(«http://xxx.xxx.xxx/myscript.php»);
connection = (HttpURLConnection) url.openConnection();
connection.setReadTimeout(3000);
connection.setConnectTimeout(3000);
connection.setRequestMethod(«POST»);
connection.setDoInput(true);

connection.connect(); View Thread

Strangely debug (IOException) value is blank.

«One man’s wage rise is another man’s price increase.» — Harold Wilson

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

I just saw this video which indicated I need to use an AsyncTask. if that is required then that is my issue I think.
How to Connect Android with PHP, MySQL — Best Android Studio Tutorial 2017 — YouTube[^]

(I reworked code and it doen’t go to CATCH now.)

Because you are trying to catch a specific exception. Try using Exception instead. Have you considered the exception’s getMessage() method?

Also, I suggest using Log.d() calls instead of popping up Toast messages when debugging.

«One man’s wage rise is another man’s price increase.» — Harold Wilson

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

Thanks David, I will look at using Exception & getMessage as well as log.d (I am new to android dev as you can probably tell.)

«One man’s wage rise is another man’s price increase.» — Harold Wilson

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

Thanks for reply.
But actually I want to update one value in sqlite after getting a notification. I had done code with this in message received method but problem is that, when app is in background, then I will get notification but can’t update value in sqlite.
So tell me any solution.