How to use putExtra and getExtra for string data

Question

Can someone please tell me how exactly to use getExtra   and putExtra   for intents  Actually I have a string variable  say str  which stores some string data  Now  I want to send this data from one activity to another activity      Intent i   new Intent FirstScreen this  SecondScreen class        String keyIdentifer    null    i putExtra strName  keyIdentifer      and then in the SecondScreen java   public void onCreate Bundle savedInstanceState                 super onCreate savedInstanceState           setContentView R layout table           TextView userName    TextView findViewById R id userName           Bundle bundle   getIntent   getExtras             if bundle getString  strName     null                          TODO here get the string stored in the string variable and do                 setText   on userName                     I know it is very basic question but unfortunately I am stuck here   Please help   Thanks   Edit  Here the string which I am trying to pass from one screen to the other is dynamic  That is I have an editText where I am getting string whatever user types  Then with the help of myEditText getText   toString     I am getting the entered value as a string then I have to pass this data

User · Answer

Update in Intent class   Use hasExtra   for checking if intent has data on key  You can use now getStringExtra   directly   Pass Data intent putExtra PutExtraConstants USER NAME   quot user quot     Get Data String userName  if  getIntent   hasExtra PutExtraConstants USER NAME         userName   getIntent   getStringExtra PutExtraConstants USER NAME      Always put keys in constants as best practice  public interface PutExtraConstants       String USER NAME    quot USER NAME quot

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first Screen java  text  TextView findViewById R id tv1   edit  EditText findViewById R id edit   button  Button findViewById R id bt1    button setOnClickListener new OnClickListener         public void onClick View arg0            String s edit getText   toString             Intent ii new Intent MainActivity this  newclass class           ii putExtra  name   s           startActivity ii               Second Screen java  public class newclass extends Activity       private TextView Textv        Override     protected void onCreate Bundle savedInstanceState             super onCreate savedInstanceState           setContentView R layout intent           Textv    TextView findViewById R id tv2           Intent iin  getIntent            Bundle b   iin getExtras             if b  null                        String j   String  b get  name                Textv setText j

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It is very easy to implement intent in Android   It takes you to move from one activity to another activity we have to two method putExtra    and getExtra   Now I am showing you the example        Intent intent   new Intent activity registration this  activity Login class                   intent putExtra  AnyKeyName   Email getText   toString         pass your values and retrieve them in the other Activity using AnyKeyName                         startActivity intent     Now we have to get the value from AnyKeyName parameter the below mentioned code will help in doing this         String data   getIntent   getExtras   getString  AnyKeyName            textview setText data     We can easily set the receiving value from Intent wherever we required

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put string first  Intent secondIntent   new Intent this  typeof SecondActivity                secondIntent PutExtra  message    Greetings from MainActivity      retrieve it after that   var message   this Intent GetStringExtra  message      thats All

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A small addendum  you do not have to create your own name for the key  android provides these  f ex  Intent EXTRA TEXT  Modifying the accepted answer    Intent i   new Intent FirstScreen this  SecondScreen class      String strName   null  i putExtra Intent EXTRA TEXT  strName         Then  to retrieve the value try something like   String newString  Bundle extras   getIntent   getExtras    if extras    null        newString  null    else       newString  extras getString Intent EXTRA TEXT

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A single inlined code would be enough for this task  This worked for me effortlessly  For  android devlopers out there  String strValue Objects requireNonNull getIntent   getExtras    getString  quot string Key quot

User · Answer

You can Simply use static variable to store the string of your edittext and then use that variable in the other class  Hope this will solve your problem

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At FirstScreen java      Intent intent   new Intent FirstScreen this  SecondScreen class       String keyIdentifier   null      intent putExtra strName  keyIdentifier     At SecondScreen java      String keyIdentifier      if  savedInstanceState    null          keyIdentifier   String  savedInstanceState getSerializable strName       else         keyIdentifier   getIntent   getExtras   getString strName

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Intent intent   new Intent view getContext    ApplicationActivity class                           intent putExtra  int   intValue                           intent putExtra  Serializable   object                           intent putExtra  String   stringValue                           intent putExtra  parcelable   parObject                           startActivity intent     ApplicationActivity  Intent intent   getIntent    Bundle bundle   intent getExtras     if bundle    null      int mealId   bundle getInt  int       Object object   bundle getSerializable  Serializable       String string   bundle getString  String       T string    lt T gt bundle getString  parcelable

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This is what i have been using  hopfully it helps someone   simple and affective   send data      intent   new Intent getActivity    CheckinActivity class       intent putExtra  mealID   meal Meald       startActivity intent     get data      int mealId       Intent intent   getIntent        Bundle bundle   intent getExtras         if bundle    null           mealId   bundle getInt  mealID            cheers

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Simple  In first Activity-      EditText name   EditText  findViewById R id editTextName       Button button   Button  findViewById R id buttonGo       button setOnClickListener new View OnClickListener              Override         public void onClick View v                Intent i   new Intent MainActivity this Main2Activity class               i putExtra  name  name getText   toString                startActivity i                         In second Activity-       Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main2       TextView t    TextView  findViewById R id textView       Bundle bundle getIntent   getExtras        String s bundle getString  name        t setText s          You can add if else conditions if you want

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Push Data  import android content Intent                Intent intent            new Intent               this               MyActivity class        intent putExtra   paramName    paramValue         startActivity  intent      The above code might be inside the main activity   MyActivity class  is the second Activity we want to launch  it must be explicitly included in your AndroidManifest xml file    lt activity android name   MyActivity    gt    Pull Data  import android os Bundle                Bundle extras   getIntent   getExtras        if  extras    null                String myParam   extras getString  paramName              else                   oops          In this example  the above code would be inside your MyActivity java file   Gotchas  This method can only pass strings  So let s say you need to pass an ArrayList to your ListActivity  a possible workaround is to pass a comma-separated-string and then split it on the other side   Alternative Solutions  Use SharedPreferences

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Best Method     SendingActivity    Intent intent   new Intent SendingActivity this  RecievingActivity class   intent putExtra  keyName   value       pass your values and retrieve them in the other Activity using keyName startActivity intent     RecievingActivity   Bundle extras   intent getExtras        if extras    null      String data   extras getString  keyName       retrieve the data using keyName        shortest way to recieve data    String data   getIntent   getExtras   getString  keyName   defaultKey        This requires api 12                the second parameter is optional   If keyName is null then use the defaultkey as data

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More simple   sender side  Intent i   new Intent SourceActiviti this TargetActivity class   i putExtra  id   string data    startActivity i    receiver side  Intent i   new Intent SourceActiviti this TargetActivity class   String strData   i getStringExtra  id

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put function  etname  EditText findViewById R id Name           tvname  TextView findViewById R id tvName            b1   ImageButton  findViewById R id Submit            b1 setOnClickListener new OnClickListener                 public void onClick View arg0                    String s etname getText   toString                     Intent ii new Intent getApplicationContext    MainActivity2 class                   ii putExtra  name   s                   Toast makeText getApplicationContext    Page 222   Toast LENGTH LONG  show                    startActivity ii                                getfunction   public class MainActivity2 extends Activity       TextView tvname      EditText etname        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main activity2           tvname    TextView findViewById R id tvName           etname  EditText findViewById R id Name           Intent iin  getIntent            Bundle b   iin getExtras             if b  null                       String j2   String  b get  name     etname setText j2               Toast makeText getApplicationContext    ok  Toast LENGTH LONG  show

User · Answer

send  startActivity new Intent First this  Secend class  putExtra  key  edit getText tostring      get  String myData   getIntent getStringExtra  key

User · Answer

Put String in Intent Object    Intent intent   new Intent FirstActivity this NextAcitivity class     intent putExtra  key  your String     StartActivity intent     NextAcitvity in onCreate method get String  String my string getIntent   getStringExtra  key      that is easy and short method

User · Answer

Use this to  put  the file     Intent i   new Intent FirstScreen this  SecondScreen class      String strName   null  i putExtra  STRING I NEED   strName     Then  to retrieve the value try something like   String newString  if  savedInstanceState    null        Bundle extras   getIntent   getExtras        if extras    null            newString  null        else           newString  extras getString  STRING I NEED            else       newString   String  savedInstanceState getSerializable  STRING I NEED

[android] How to use putExtra() and getExtra() for string data

Update in Intent class.

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