Develop Reference

I am trying to put a intent to my app so i can navigate

I am trying this intent so I can navigate from one activity to another activity but I'm getting this error `
final Button btnAdd = findViewById(R.id.addEmp);
btnAdd.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
if(v.getId() == R.id.addEmp){
Intent intent = new
Intent(getCallingActivity(),AddEmployee.class);
startActivity(intent);
}
}
});`
there is a red line under
(getCallingActivity(),AddEmployee.class);
there error says
cannot resolve constructor
Is anything wrong with this
(getCallingActivity(),AddEmployee.class);
statement?

You need to change your line from
Intent intent = new Intent(getCallingActivity(),AddEmployee.class);
to this:
Intent intent = new Intent(YourActivityName.this,AddEmployee.class);
OR
Intent intent = new Intent(getApplicationContext(),AddEmployee.class);
Edit
Whats wrong with getCallingActivty()?
getCallingActivity() returns ComponentName while intent constructor requires Context as a first argument.
Hope this will work

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.

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.

Switch Screens in Android not working

I have a "Play Now" button for a simple android game. When I click the button it calls start, but it doesn't do anything.
Here is start():
public void start(View view) {
Intent myIntent = new Intent(this, Game.class);
startActivity(myIntent);
}
and Game.java:
public class Game extends MainActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.game);
Intent intent = new Intent();
setResult(RESULT_OK, intent);
finish();
}
}
Also, I didn't forget to put it into the manifest
<activity android:name=".Game"></activity>
I'm new to android and this is all very confusing. I tried putting an intent filter although I probably did it wrong.
I looked at this How to switch between screens? but it didn't work for me.

You are finishing the activity just when you create it (onCreate). Try deleting or commenting finish(); and good luck!

remove following lines, we use them with startActivityForResult , after removing it should work other than this everything is fine
Intent intent = new Intent();
setResult(RESULT_OK, intent);
finish();

Actually,your start function is working fine.But the problem is with onCreate() method in Game activity.You are calling finish() method in this which is killing the activity.Get rid of this method and then check.One thing more,I don't understand what is the purpose of setResult in your context.It is actually used for startActivityForResult() method.Refer to this link for further information:
https://developer.android.com/training/basics/intents/result.html
public class Game extends MainActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.game);
//Intent intent = new Intent();
//setResult(RESULT_OK, intent);
//finish();
}
}

Pass variable value to another TextView Activity

As the step value of a variable of an Activity for a TextView other Activity? Can Help?
Thank you!
((See explanation on the picture))

Intent activityTwo = new Intent(this, Activity2.class);
activityTwo.putIntExtra("key", sumSettlement);
startActivity(activityTwo);
Now, in Activity2:
if(getIntent() != null) {
textView.setText(String.valueOf(getIntent.getExtra("key"));
}

You can use of local broadcast receiver.
First register receiver in Activity B
//in onCreate Method
LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
new IntentFilter("my-event-name"));
// It will be called whenever an Intent
// with an action named "my-event-name" is broadcasted.
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
// Get extra data included in the Intent
String message = intent.getStringExtra("message");
// show this message in textview
}
};
In Activity A
//broadcast this
Intent intent = new Intent("my-event-name");
intent.putExtra("message", Integer(sumSettlment).toString());
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);

the easiest way is to use Intent: in first Activity
Intent intent =new Intent(CurrentClass.this,DisClass.class);
intent.putExtra("myTextValue",textView.getText().toString());
startActivity(intent);
in the dist activity do the following :
String myValue=getIntent().getExtra().getString("myTextValue");
textView.setText(myValue);