How to send string from one activity to another

Question

I have a string in activity2  String message   String format   Current Location  n Longitude   1 s  n Latitude   2 s   lat  lng      I want to insert this string into text field in activity1  How can I do that

User · Answer

Intents are intense   Intents are useful for passing data around the android framework   You can communicate with your own Activities and even other processes   Check the developer guide and if you have specific questions  it s a lot to digest up front  come back

User · Answer

TWO CASES  There are two situations possible when we talk about passing data between activities         Let s say there are two activities A and B and there is a String X                 and you are in Activity A       Now let s see the two cases       A-------- B A lt --------B      CASE 1    String X is in A and you want to get it in Activity B    It is very straightforward     In Activity A      1  Create Intent 2  Put Extra value 3  startActivity      Intent i   new Intent A this  B class   i putExtra  Your KEY  X   startActivity i    In Activity B      Inside onCreate   method retrieve string X using the key which you used while storing X  Your KEY            Intent i   getIntent    String s   i getStringExtra  Your KEY         Case 2      This case is little tricky if u are new to Android   development Because you are in Activity A  you move to Activity B    collect the string  move back to Activity A and retrieve the   collected String or data  Let s see how to deal with this situation           In Activity A 1  Create Intent 2  start an activity with a request code           Intent i   new Intent A this  B class   startActivityForResult i your req code     In Activity B 1  Put string X in intent 2  Set result 3  Finish activity          Intent returnIntent   new Intent    returnIntent  putString  KEY  X   setResult resCode returnIntent        for the first argument  you could set Activity RESULT OK or your custom rescode too finish      Again in Activity A 1  Override onActivityResult method        onActivityResult int req code  int res code  Intent data           if req code  your req code                     String X   data getStringExtra  KEY                Further understanding of Case 2  You might wonder what is the reqCode  resCode in the onActivityResult int reqCode  resCode  Intent data          reqCode is useful when you have to identify from which activity you are getting the result from          Let s say you have two buttons  one button starts Camera  you click a photo and get the bitmap of that image in your Activity as a result   another button starts GoogleMap  you get back the current coordinates of your location as a result   So to distinguish between the results of both activities you start CameraActivty and MapActivity with different request codes      resCode  is useful when you have to distinguish between how results are coming back to requesting activity      For eg  You start Camera Activity  When the camera activity starts  you could either take a photo or just move back to requesting activity without taking a photo with the back button press  So in these two situations  your camera activity sends result with different resCode ACTIVITY RESULT OK and ACTIVITY RESULT CANCEL respectively                Relevant Links     Read more on Getting result

User · Answer

For those people who use Kotlin do this instead   Create a method with a parameter containing String Object  Navigate to another Activity  For Example        The Method I Mentioned Above  private fun parseTheValue  NonNull valueYouWantToParse  String         val intent   Intent this  AnotherActivity  class java       intent putExtra  quot value quot   valueYouWantToParse       intent addFlags Intent FLAG ACTIVITY REORDER TO FRONT        startActivity intent       this finish       Then just call  parseTheValue  quot the String that you want to parse quot   e g  val theValue  String  parseTheValue theValue   then in the other activity  val value  Bundle   intent extras        enter the  name  from the   param  val str  String   value getString  quot value quot   toString         For testing println str   Hope This Help  Happy Coding    Kotlin Code Added By John Melody

User · Answer

You can use intents  which are messages sent between activities  In a intent you can put all sort of data  String  int  etc   In your case  in activity2  before going to activity1  you will store a String message this way    Intent intent   new Intent activity2 this  activity1 class   intent putExtra  message   message   startActivity intent     In activity1  in onCreate    you can get the String message by retrieving a Bundle  which contains all the messages sent by the calling activity  and call getString   on it    Bundle bundle   getIntent   getExtras    String message   bundle getString  message      Then you can set the text in the TextView   TextView txtView    TextView  findViewById R id your resource textview       txtView setText message     Hope this helps

User · Answer

Intent intent   new Intent activity1 this  activity2 class    intent putExtra  message   message    startActivity intent     In activity2  in onCreate    you can get the String message by retrieving a Bundle  which contains all the messages sent by the calling activity  and call getString   on it      Bundle bundle   getIntent   getExtras      String message   bundle getString  message

User · Answer

You can use the GNLauncher  which is part of a utility library I wrote in cases where a lot of interaction with the Activity is required  With the library  it is almost as simple as calling a function on the Activity object with the required parameters  https   github com noxiouswinter gnlib android wiki gnlauncher

User · Answer

In order to insert the text from activity2 to activity1  you first need to create a visit function in activity2   public void visitactivity1         Intent i   new Intent this  activity1 class       i putExtra  key   message       startActivity i       After creating this function  you need to call it from your onCreate   function of activity2   visitactivity1      Next  go on to the activity1 Java file  In its onCreate   function  create a Bundle object  fetch the earlier message via its key through this object  and store it in a String       Bundle b   getIntent   getExtras        String message   b getString  key           the blank String in the second parameter is the default value of this variable  In case the value from previous activity fails to be obtained  the app won t crash  instead  it ll go with the default value of an empty string   Now put this element in a TextView or EditText  or whichever layout element you prefer using the setText   function

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Say there is EditText et1 in ur MainActivity and u wanna pass this to SecondActivity  String s et1 getText   toString    Bundle basket  new Bundle    basket putString  abc   s   Intent a new Intent MainActivity this SecondActivity class   a putExtras basket   startActivity a     now in Second Activity  say u wanna put the string passed from EditText et1 to TextView txt1 of SecondActivity  Bundle gt getIntent   getExtras    str gt getString  abc    txt1 setText str

User · Answer

You can send data from one actvity to another with an Intent  Intent sendStuff   new Intent this  TargetActivity class   sendStuff putExtra key  stringvalue   startActivity sendStuff     You then can retrieve this information in the second activity by getting the intent and extracting the string extra  Do this in your onCreate   method   Intent startingIntent   getIntent    String whatYouSent   startingIntent getStringExtra key  value     Then all you have to do is call setText on your TextView and use that string

[android] How to send string from one activity to another?

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