How to pass data from 2nd activity to 1st activity when pressed back - android

Question

I ve 2 activities  Activity1 and Activity2   In Activity1 I ve a Button and TextView  When the button is clicked Activity2 is started   In Activity2 I ve an EditText   I want to display the data retrieved from EditText in Activity2 in the TextView in Activity1 when back is pressed from Activity2   can someone help me with the code to make this work

User · Answer

TL DR Use Activity startActivityForResult  Long answer   You should start by reading the Android developer documentation  Specifically the topic of your question is covered in the Starting Activities and Getting Results section of the Activity documentation   As for example code  the Android SDK provides good examples  Also  other answers here give you short snippets of sample code to use   However  if you are looking for alternatives  read this SO question  This is a good discussion on how to use startActivityForResults with fragments  as well as couple othe approaches for passing data between activities

User · Answer

Activity1 should start Activity2 with startActivityForResult     Activity2 should use setResult   to send data back to Activity1    In Activity2    Override public void onBackPressed         String data   mEditText getText        Intent intent   new Intent        intent putExtra  MyData   data       setResult resultcode  intent       In Activity1   onActivityResult int requestCode  int resultCode  Intent data        if  requestCode    1            if resultCode    RESULT OK                String myStr data getStringExtra  MyData                mTextView setText myStr

User · Answer

Start Activity2 with startActivityForResult and use setResult method for sending data back from Activity2 to Activity1  In Activity1 you will need to override onActivityResult for updating TextView with EditText data from Activity2   For example   In Activity1  start Activity2 as   Intent i   new Intent this  Activity2 class   startActivityForResult i  1     In Activity2  use setResult for sending data back   Intent intent   new Intent    intent putExtra  editTextValue    value here   setResult RESULT OK  intent           finish      And in Activity1  receive data with onActivityResult   public void onActivityResult int requestCode  int resultCode  Intent data        super onActivityResult requestCode  resultCode  data       if  requestCode    1             if resultCode    RESULT OK                 String strEditText   data getStringExtra  editTextValue                               If you can  also use SharedPreferences for sharing data between Activities

User · Answer

From your FirstActivity call the SecondActivity using  startActivityForResult   method   For example   Intent i   new Intent this  SecondActivity class   startActivityForResult i  1     In your SecondActivity set the data which you want to return back to FirstActivity  If you don t want to return back  don t set any   For example  In secondActivity if you want to send back data   Intent returnIntent   new Intent    returnIntent putExtra  result  result   setResult Activity RESULT OK returnIntent   finish      If you don t want to return data   Intent returnIntent   new Intent    setResult Activity RESULT CANCELED  returnIntent   finish      Now in your FirstActivity class write following code for the onActivityResult   method    Override protected void onActivityResult int requestCode  int resultCode  Intent data        if  requestCode    1            if resultCode    Activity RESULT OK               String result data getStringExtra  result                      if  resultCode    Activity RESULT CANCELED                  Write your code if there s no result

User · Answer

Read these    Return result to onActivityResult   Fetching Result from a called activity - Android Tutorial for Beginners   These articles will help you understand how to pass data between two activities in Android

User · Answer

this is your first Activity1   public class Activity1 extends Activity  private int mRequestCode   100    Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState        Intent intent   new Intent this  Activity2 class       startActivityForResult intent  mRequestCode       Override protected void onActivityResult int requestCode  int resultCode  Intent data        super onActivityResult requestCode  resultCode  data       if requestCode    mRequestCode  amp  amp  resultCode    RESULT OK           String editTextString   data getStringExtra  editText                From here you are starting your Activity2 class by using startActivityForResult mRequestCode  Activity2 class    Now this is your second Activity  name is Activity2  public class Activity2 extends Activity   private EditText mEditText    Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState          mEditText    EditText findViewById R id edit text        Intent intent   new Intent        intent putExtra  editText   mEditText getText   toString         setResult RESULT OK  intent          Now when you done with your second Activity then you call setResult   method  from onBackPress   or from any button click when your Activity2 will destroy then your Activity1 s call back method onActivityResult   will call from there you can get your data from intent    Hope it will help to you

User · Answer

and I Have an issue which I wanted to do this sending data type in a Soft Button which I d made and the softKey which is the default in every Android Device  so I ve done this  first I ve made an Intent in my  A  Activity               Intent intent   new Intent                intent setClass context   AddNewEmployee class               intent setFlags Intent FLAG ACTIVITY REORDER TO FRONT               startActivityForResult intent  6969               setResult 60     Then in my second Activity  I ve declared a Field in my  B  Activity   private static int resultCode   40    then after I made my request successfully or whenever I wanted to tell the  A  Activity that this job is successfully done here change the value of resultCode to the same I ve said in  A  Activity which in my case is  60  and then   private void backToSearchActivityAndRequest         Intent data   new Intent        data putExtra  PhoneNumber   employeePhoneNumber       setResult resultCode  data       finish        Override public void onBackPressed         backToSearchActivityAndRequest        PS  Remember to remove the Super from the onBackPressed Method if you want this to work properly   then I should call the onActivityResult Method in my  A  Activity as well       Override     protected void onActivityResult int requestCode  int resultCode  Intent data            super onActivityResult requestCode  resultCode  data           if  requestCode    6969  amp  amp  resultCode    60                if  data    null                        user mobile   data getStringExtra  PhoneNumber                        numberTextField setText user mobile                       getEmployeeByNumber                                    that s it  hope it helps you out   HappyCoding

User · Answer

Other answers were not working when I put setResult in onBackPressed  Commenting call to super onBackPressed and calling finish manually solves the problem    Override public void onBackPressed           super onBackPressed        Intent i   new Intent        i putExtra EXTRA NON DOWNLOADED PAGES  notDownloaded       setResult RESULT OK  i       finish        And in first activity    Override protected void onActivityResult int requestCode  int resultCode  Intent data        super onActivityResult requestCode  resultCode  data       if  requestCode    QUEUE MSG            if  resultCode    RESULT OK                Serializable tmp   data getSerializableExtra MainActivity EXTRA NON DOWNLOADED PAGES               if  tmp    null                  serializable   tmp

User · Answer

Take This as an alternate to startActivityforResult But keep in mind that for such cases this approach can be expensive in terms of performance but in some cases you might need to use      In Activity2     Override public void onBackPressed     String data   mEditText getText    SharedPreferences sp   getSharedPreferences  LoginInfos   0   Editor editor   sp edit    editor putString  email  data   editor commit        In Activity1      Override public void onResume     SharedPreferences sp   getSharedPreferences  LoginInfos   0   String  dataFromOtherAct  sp getString  email    no email

[android] How to pass data from 2nd activity to 1st activity when pressed back? - android

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