Develop Reference

Using Multiple intents to pass data in activities not working

I would like to pass data between activities. When I use one activity (Details), everything works fine, but when I add a second activity (MapsActivity), the application ignores (Details) and transfers data only to MapsActivity. How can I fix it? Thanks in advance
holder.itemView.setOnClickListener(v -> {
Intent mIntent = new Intent(context, Details.class);
Intent mapIntent= new Intent(context,MapsActivity.class);
mIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mapIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mIntent.putExtra("Country_CurrencyCode", pozycja.getCurrencies().get(0).getCode());
mIntent.putExtra("Country_CurrencyName", pozycja.getCurrencies().get(0).getName());
mIntent.putExtra("Country_CurrencySymbol", pozycja.getCurrencies().get(0).getSymbol());
context.startActivity(mIntent);
mapIntent.putExtra("Country_Lat",pozycja.getLatlng().get(0));
mapIntent.putExtra("Country_Lng",pozycja.getLatlng().get(1));
context.startActivity(mapIntent);

This is a behavior I did not expect but after testing your code, I found these:
You start 1st the Details activity and 2nd the MapsActivity.
The result is that you see on the screen the 2nd activity: MapsActivity.
For this activity you can check that it's got all the extra values that you passed.
What is happening is that although you have also started the 1st activity: Details, its onCreate() has not yet been invoked, but it will be invoked as soon as you close the 2nd activity MapsActivity and then you will see that its extras are there as you put them. So the 1st activity gets the extras fine but until its onCreate() is called you can't access them.
So a workaround:
Start only Details activity but pass to it not only its own extras but MapsActivity's extras also. In Details's onCreate() start MapsActivity with
its own extras.

How can I know the startActivity intent from other application?

I have an Activity and assume that has been launched. When the other application use startActivity method to start my Activity, my Activity will show and run the onResume Method, but I can't find any way to get the intent which is used in startActivity method by the other application. I want to get the extra data in the intent. How can I do?
EDIT
My Activity is singleTask, and I want to get the startActivity intents form other applications. I think it is not associate with filters.

Have you tried using getIntent() ?
Then you can do:
this.getIntent().getExtras();
After that if you need new intents just override the onNewIntent function in your activity.

I simply say an example. When we need to share something. We click share button which shows a list of app by which we can share our things.
So, if you want to make that kind of app which can receive other app data then you need make your activity capable of receiving that data. In order to receive implicit intents, you must include the CATEGORY_DEFAULT category in the intent filter in manifest.
Below this link you will get some more information : http://developer.android.com/training/basics/intents/filters.html

How to differentiate From Which Activity the current intent comes

Form Activity Login I call
Intent intent=new Intent(LogIn.this,BRInfoActivity.class);
From Activity BrActivityList I Call
Intent intent=new Intent(BRActiviList.this, BRInfoActivity.class);
intent.putExtra("BRinfo", objBR);
And Now in BRInfoActivityList
Intent i = getIntent();
BrInfoEN objBR=(BrInfoEN)i.getSerializableExtra("BRinfo");
Now i want if(intent==BrActivityList)The last two above line execute otherwise does not.How to do it?

If you will start activity with
startActivityForResult().
Then you can use getCallingActivity() to get caller.

Form Activity Login call this--
Intent intent=new Intent(LogIn.this,BRInfoActivity.class);
intent.putExtra("call_from","ActivityClass");
From Activity BrActivityList Call--
Intent intent=new Intent(BRActiviList.this, BRInfoActivity.class);
intent.putExtra("call_from", "BRActivity");
Now, when you get the intent, compare the "call_from" string in an if-else block! That's it!

May this help you...
The new intent comes as part of onNewIntent(Intent). The original Intent is still available via getIntent().
You put whatever code you need to into onNewIntent in order to update the UI with the new parameters; probably similar to what you're doing in onCreate.
Also, you probably want to call setIntent(intent) in onNewIntent to make sure future calls to getIntent() within the Activity lifecycle get the most recent Intent data.

Intent extras missing when activity started

Inside a broadcast receiver I want to start my app (Activity) and pass in some data.
My problem is that the extras don't seem to carry over into the activity. I am trying to get the data inside the onNewIntent(Intent i) function.
Any ideas?
Here is my current attempt in the BroadcastReceiver:
Intent intSlider = new Intent();
intSlider.setClass(UAirship.shared().getApplicationContext(), SliderMenuActivity.class);
intSlider.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intSlider.putExtra("action", ScreensEnum.Object);
intSlider.putExtra("objectId", objectId);
intSlider.putExtra("objectCode", objectCode);
intSlider.putExtra("userId", userId);
UAirship.shared().getApplicationContext().startActivity(intSlider);
EDIT - Added code used in onNewIntent() and onCreate()
The following code works great in onCreate() when the app isn't currently running. For when the app is already running the same code doesn't work (i.e. no extras) from the onNewIntent() function.
Intent intent = getIntent();
if(intent.hasExtra("objectId")) {
loadDetail(intent.getStringExtra("objectId"), "2w232");
}

The problem is getIntent() method. It always returns the intent that started the activity, not the most recent one. You should use intent that was passed to onNewIntent method as an argument.

We stumbled upon this problem once, when we were trying to launch/call onNewIntent on an Activity in response to a local notification tap. The extras that we put on our Intent were disappearing at the time onNewIntent received it.
I don't remember this being documented anywhere back then, but the "problem" was that we weren't setting the action field on the Intents that we prepared. Turns out if the Intent received by your Activity doesn't have an action set using setAction, the system still delivers the Intent to its destination, but doesn't transmit the extras you have set while creating the Intent.
TL;DR:
If you encounter this problem with an Intent with no action, calling setAction to set an arbitrary action value before sending the Intent might fix it.

Extract from the docs
This is called for activities that set launchMode to "singleTop" in
their package, or if a client used the FLAG_ACTIVITY_SINGLE_TOP flag
when calling startActivity(Intent). In either case, when the activity
is re-launched while at the top of the activity stack instead of a new
instance of the activity being started, onNewIntent() will be called
on the existing instance with the Intent that was used to re-launch
it.
An activity will always be paused before receiving a new intent, so
you can count on onResume() being called after this method.
Note that getIntent() still returns the original Intent. You can use
setIntent(Intent) to update it to this new Intent.
I think the last paragraph explains your problem.

You have to set the flag FLAG_ACTIVITY_SINGLE_TOP or set launchMode singleTop in the manifest file.
Of course when onNewIntent is called you do not use getIntent but the Intent received as argument.
onNewIntent will be called when the activity instance already exists. For example, if last time you pressed the Home Screen button.
I wrote a solution that worked for me here: Intent with old extra in onCreate() for singleTask Activity

You can store the last received intent in a member variable (mLastIntent).
Then you can use this member in your onResume() method to query for your extra data.
private Intent mLastIntent;
#Override
protected void onNewIntent(Intent intent) {
mLastIntent = intent;
};

difference between intent and intenfilter in android

Hi friends
can anybody tell what is the use of intent filter and what is difference between intent and intent filter
Thanks

An Intent is an object passed to Context.startActivity(),Context.startService() or Activity.startActivityForResult() etc. to launch an activity or get an existing activity to do something new.
While an Intent filter describes a capability of the component(like activities, services, and broadcast receivers )
For more details see this

Intent's are used to start new activity from the current activity. With two ways
1) Activity.startActivity(intent);
2) Activity.startActivityForResult(intent,rqwuestCode);
//The above thing's you need to put in .java file
Intent-filter you need to mention on manifeast file.
// Intent filter are used for broadcast receiver. Whenever the intent filter condition is match the android OS will launch that activity.

An intent is an object that can hold the os or other app activity and its data in uri form.It is started using startActivity(intent-obj)..\n whereas IntentFilter can fetch activity information on os or other app activities.