How to pass a value from one Activity to another in Android

Question

I have created an Activity with a AutuCompleteTextView ACTV  and button  I enter some text in the ACTV then press the button  After I press the button I want the Activity to go to another Activity  In the second Activity I just want to display the text entered in ACTV of the first actvity  as a TextView     I know how to start the second activity which is as below   Intent i   new Intent this  ActivityTwo class   startActivity i     I have coded this to obtain the text entered from the ACTV   AutoCompleteTextView textView    AutoCompleteTextView  findViewById R id autocomplete   CharSequence getrec textView getText      My question here is how to pass  getrec   after I press the button  from the first Activity to the second  And later recieve  getrec  in the second activity   Please assume that I have created the event handler class for the button by using  onClick View v

User · Answer

Its simple If you are passing String X from A to B.
A--> B

In Activity A
1) Create Intent
2) Put data in intent using putExtra method of intent
3) Start activity

Intent i = new Intent(A.this, B.class);
i.putExtra("MY_kEY",X);

In Activity B
inside onCreate method
1) Get intent object
2) Get stored value using key(MY_KEY)

Intent intent = getIntent();
String result = intent.getStringExtra("MY_KEY");

This is the standard way to send data from A to B. you can send any data type, it could be int, boolean, ArrayList, String[]. Based on the datatype you stored in Activity as key, value pair retrieving method might differ like if you are passing int value then you will call

intent.getIntExtra("KEY");

You can even send Class objects too but for that, you have to make your class object implement the Serializable or Parceable interface.

TransactionTooLargeException

How much data you can send across size. If data exceeds a certain amount in size then you might get TransactionTooLargeException. Suppose you are trying to send bitmap across the activity and if the size exceeds certain data size then you might see this exception.

User · Answer

Thats trivial  use Intent putExtra to pass data to activity you start   Use then Bundle getExtra to retrieve it   There are lots of such questions already https   stackoverflow com search q How to pass a value from one Activity to another in Android  be sure to use search first next time

User · Answer

Standard way of passing data from one activity to another   If you want to send large number of data from one activity to another activity then you can put data in a bundle and then pass it using putExtra   method     Create the  intent   Intent i   new Intent this  ActivityTwo class   String one  xxxxxxxxxxxxxxx   String two  xxxxxxxxxxxxxxxxxxxxx     Create the bundle Bundle bundle   new Bundle      Add your data to bundle bundle putString    ONE     one   bundle putString    TWO     two       Add the bundle to the intent i putExtras bundle     Fire that second activity startActivity i     otherwise you can use putExtra   directly with intent to send data and getExtra   to get data   Intent i new Intent this  ActivityTwo class   i putExtra  One  one   i putExtra  Two  two   startActivity i

User · Answer

Implement in this way  String i  hi   Intent i   new Intent this  ActivityTwo class     Create the bundle Bundle b   new Bundle      Add your data to bundle b putString    stuff     i   i putExtras b   startActivity i     Begin that second activity  inside this class to utilize the Bundle values use this code  Bundle bundle   getIntent   getExtras    String text  bundle getString  stuff

User · Answer

You can use Bundle to do the same in Android  Create the intent   Intent i   new Intent this  ActivityTwo class   AutoCompleteTextView textView    AutoCompleteTextView  findViewById R id autocomplete   String getrec textView getText   toString       Create the bundle Bundle bundle   new Bundle       Add your data to bundle bundle putString    stuff     getrec      Add the bundle to the intent i putExtras bundle      Fire that second activity startActivity i     Now in your second activity retrieve your data from the bundle     Get the bundle Bundle bundle   getIntent   getExtras       Extract the data    String stuff   bundle getString    stuff

User · Answer

in the first Activity   Intent i new Intent getApplicationContext secondActivity class    i putExtra  key  value    startActivity i     and in the SecondActivity   String value getIntent getStringExtra  Key

User · Answer

Sample Kotlin code as below -  Page 1  val i   Intent this  Page2  class java              val getrec   list position  promotion id             val bundle   Bundle               bundle putString  stuff   getrec              i putExtras bundle              startActivity i    Page 2          var bundle   getIntent   getExtras           var stuff   bundle getString  stuff

[android] How to pass a value from one Activity to another in Android?

TransactionTooLargeException

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