Develop Reference

Include Intent extra when using recreate()

I'm trying to recreate() and activity on Android. I need additional data to be passed via an Intent to the recreated activity. How can this be done?
The following code does not work.
getIntent().putExtra("flag",true);
recreate();

You can call recreate() and save your date into SharedPreferences. In this way you are free to do many things and also the previous activity is completely destroyed before NewActivity begin. Take a look at this deep StackOverflow answer.

Why don't you restart activity via Intent :
Intent intent = getIntent();
intent.putExtra("your","params");
finish();
startActivity(intent);

How to send data from one activity to another by using getIntent() instead of usinf new Intent();

usually we send data from one activity to another by using:-
Intent i=new Intent("<action name>");
i.putExtras("name",data);
startActivity(i);
My question is can we send data from one activity to another by using:-
Intent i=this.getIntent();
i.putExtras("name",data);
setResult(Activity.RESULT_OK,i);
finish();
If yes please explain the concept.
Also,these two classes are in the different projects in Eclipse.My another question is, is it possible to send data through intent to another activity situated in another project??

So you're starting from Activity A and going to Activity B using startActivityForResult()
Now we're in Activity B and want to go back to Activity A:
Intent i = new Intent();
if(getIntent().getExtras() != null) i.putExtras(getIntent().getExtras());
setResult(Activity.RESULT_OK, i);
finish();
Doing something like that will allow you to pass back the extras from the calling Intent (if they exist), which would then be reachable from Activity A's onActivityResult() method.

Yes. You can do so, when you call another intent for a result. ie startActivityForResult(Intent,Request_Code);

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;
};

Android 2.3.3 | Differentiating Intents That Start an Activity

In Android 2.3.3, how does one differentiate Intents that start a particular Activity. For example, if both Activity_A and Activity_B have intents that call startActivityForResult( intent, requestCode), how does Activity_C differentiate between which Activity has started it? Also, I know that one passes a requestCode to the starting Activity, but how does this Activity handle the requestCode? There is no method in Intent that says getRequestCode(). Is the only way to do this to place the requestCode in a Bundle in addition to the method startActivityForResult? Thanks!

Intent API:
http://developer.android.com/reference/android/content/Intent.html
One solution would be to pass along an extra piece of identifying data. For example:
intent.putExtra("activity", "com.whatever.MyActivity");
Then the receiving Activity can read it:
Bundle extras = getIntent().getExtras();
String activityName = extras.getString("activity");
It seems like there should be an easy method call to tell what the sending Intent was, but if so, I'm not aware of it.

Get the intent from onCreate in Android

I launch an activity from my widget using an Intent with some extra, anyway I can only get the Intent when the activity is in background.. How can I get the Intent when activity is created? Tried with this.getIntent() but extras are null.
Thanks in advance

How can I get the Intent when activity is created?
Call getIntent() on the Activity.
Tried with this.getIntent() but extras are null.
One possibility is that you are arranging for an existing instance of the activity to return to the foreground (e.g., including FLAG_ACTIVITY_REORDER_TO_FRONT), in which case you will need to override onNewIntent() and collect the Intent there.
Another possibility is that you originally created a PendingIntent for the Intent with no extras, then later tried to create a new PendingIntent on an equivalent Intent (e.g., identifying the same activity) and included extras. In that case, you need to include FLAG_UPDATE_CURRENT or FLAG_CANCEL_CURRENT when creating the PendingIntent, so your new/changed extras are taken into account.