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sending a data to another activity with putExtra and doesn't work java android

I used intent to send a primarykey of my app to another activity but it debug my application I don't know why?
I'm sure that I put the syntax corrrectly and I tried many way I used bundle object but the same result the application has stopped
Activity iden_espvol
Intent intent=new Intent(iden_espvol.this,verf_tel_espvol.class);
intent.putExtra("TEL",tel.getText().toString());
startActivity(intent);
finish();
Activity verf_tel_espvol
Intent intent = getIntent();
String sent=intent.getStringExtra("TEL");

Try this code.. and i hope you define both activity in manifest file..
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent=new Intent(LayoutActivity.this,MainActivity.class);
intent.putExtra("TEL","65421321");
startActivity(intent);
finish();
}
});
and in second activity onCreate() method
Intent intent = getIntent();
String sent=intent.getStringExtra("TEL");
Log.d("Data",sent);
make sure value get only oncreate or onResume method because first activity finished that time call second activity this method.

OverridePendingTransition doesnt work if i will use intent

I'm trying to open an already activity with animation open.
It will run it only first time which activity starts and then it will not work again
Here is the code :
var intent = new Intent(this, typeof(TableItemsMain))
.SetFlags(ActivityFlags.ReorderToFront);
StartActivity(intent);
OverridePendingTransition(Resource.Layout.trans_left_in, Resource.Layout.trans_left_out);

onbackpressed() from Activity to Specific Fragment

I have a MainActivity class with 3 Fragments (each in their own class)
My third fragment (LoginFragment) will allow Login a user and then go to a new activity (new Intent) with some info for that user like the product.
If I press back on that Intent will go back to the LoginFragment.
I override the #OnBackPressed to start the MainActivity:
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
this.finish();
I need to know how to replace that Fragment with the LauncherFragment (Fragment 1) in MainActivity.
I have this solution but it takes 0.5 sec to 1-2 sec based on device
Intent intent = new Intent(this, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(intent);
this.finish();
would be cool to go direct to Fragment 1 like to finish the third fragment thanks :)

I fixed the issue in this idea
onBackPressed() I call a new Intent but with extras
In the MainActivity that has the 3 fragments onRestart() I check if it coming from this class ( has that extras ) than go to this fragment (click,replace,delete)
#Override
public void onBackPressed() {
Intent intent = new Intent(this, MainActivity.class);
intent.putExtra(Constants.Intents.NAVIGATE_BACK, true);
intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
this.finish();
}
on the MainActivity I got this
#Override
protected void onRestart() {
super.onRestart();
Intent intent = getIntent();
boolean navigate = intent.getBooleanExtra(Constants.Intents.NAVIGATE_BACK, false);
if (navigate) {
View homeView = bottomNavigationView.findViewById(R.id.home);
homeView.performClick();
intent.removeExtra(Constants.Intents.NAVIGATE_BACK);
}
}

If you want it to be as fast as possible, use one activity and fragments to vary the contents. Adding a fragment doesn't create a new window, whereas an activity does.
Also look at your application logic in fragment / activity startup (onCreate(), onResume(), etc). That's going to be the main factor.

Intent betwen 2 applications

I ask if I can pass to an other application some data using intent. If it's possible, how can I do clicking a button and passing to an other application?
b1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intention = new Intent(?????);
startActivity(intention);
}
});

To pass data from one activity to another you need to add it to the Intent. E.g,
Intent intention = new Intent(this, DestClass.class);
int value = 10;
intention.putExtra("KEY", value);
startActivity(intention);
and in your DestClass's onCreate(), you get it from the Intent with,
Bundle extras = getIntent().getExtras();
if (extras!= null) {
extras.getInt("KEY");
}
To send it to another application. Similarly you create an Intent as shown in the Android docs.
Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
sendIntent.setType("text/plain");
startActivity(sendIntent);
Note that in this case the Android system allows apps to register to receive Intents and if there are multiple apps that have registered for these Intents then the system lets the user choose which App they would like to handle the Intent.

Clearing Activity Stack on Intent Start

I have an app that I'm writing that starts with an initial Login/Create New Account splash screen. In onCreate it checks my SharedPreferences to see if user credentials are stored. If they are the activity launches an intent to the main activity skipping the login/create process.
if (haveCredentials()) {
Intent i = new Intent(this, MainActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
I don't want the user to be able to go back to the splash screen. As you can see I'm trying the CLEAR_TOP Intent flag as suggested by this but it doesn't seem to be working. Not sure what I'm missing.
Current State of the Activity Stack
SplashActivity->MainActivity
Desired State of the Stack
MainActivity

Have you tried finishing the current activity?
if (haveCredentials()) {
Intent i = new Intent(this, MainActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
finish(); //add this!
}

Just use finish() after startActivity(), so that when back button is pressed the previous activity will not be shown.