java – How to transfer data from one activity to another in android

In first activity you should put extra argument to intent like this:

// I assume Page.class is your second ativity
Intent intent = new Intent(this, Page.class); 
intent.putExtra("arg", getText()); // getText() SHOULD NOT be static!!!
startActivity(intent);

Then in second activity you retrive argument like this:

String passedArg = getIntent().getExtras().getString("arg");
enteredValue.setText(passedArg);

It’s also good to store “arg” String in MainActivity as constant and always refer to it in other places.

public static final String ARG_FROM_MAIN = "arg";

You need to change

 static TextView textView;
 textView = (TextView) findViewById(R.id.editText1);

to

 EditText ed1; 
 ed1 = (EditText) findViewById(R.id.editText1);

Coz you have

<EditText
android:id="@+id/editText1" // it is edittext not textview

Then

public void transferIT(View view){
String value = ed1.getText().toString()
Intent intent = new Intent(this, Page.class);
intent.putExtra("key",value);
startActivity(intent);
}

Then in onCreate of second activity

String value = getIntent().getExtras().getString("key");

You send the data in the intent when you call the second activity. This is pretty fundamental stuff. I suggest you read up on Intents and Parcelable concepts in Android and Serialization in Java that are all related to your question.

we are sending data from one activity to another where first activity is mainActivity and another is otherActivity
for mainActivity

       `Intent in = new Intent(this, OtherActivity.class);
        in.putExtra("name", etname.getText().toString());
        in.putExtra("job", etjob.getText().toString());
        in.putExtra("sal", etsal.getText().toString());    
        startActivity(in);`

for otherActivity

   `Intent in = getIntent();
    tv.setText(in.getStringExtra("name")+"\n"+in.getStringExtra("job")+" "+in.getStringExtra("sal"));

`

We are sending data from MainActivity to another Activity

MainActivity code that is sending data to another activity

public class MainActivity extends AppCompatActivity
{
    EditText t1, t2, t3;
    Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        t1 = (EditText) findViewById(R.id.edit1);
        t2 = (EditText) findViewById(R.id.edit2);
        t3 = (EditText) findViewById(R.id.edit3);
        button = (Button) findViewById(R.id.move);

        button.setOnClickListener(new View.OnClickListener()
        {
            @Override

            public void onClick(View v)
            {
                String name = t1.getText().toString();
                String email = t2.getText().toString();
                String edu = t3.getText().toString();
                if (name.equals("") || email.equals("") || edu.equals(""))
                {
                    Toast.makeText(getApplicationContext(), "Fill the form", Toast.LENGTH_LONG).show();
                }
                else
                {
                    Intent intent = new Intent(MainActivity.this, Main2Activity.class);
                    intent.putExtra("fname", name);
                    /*putExtra method take two parameter,first is key  and second is value. By using key, we retrieve data
                     */

                    intent.putExtra("femail", email);
                    intent.putExtra("fedu", edu);
                    startActivity(intent);
                    finish();
                }
            }
        });
    }
}

Receiving activity code whose name is Main2Activity.java

public class Main2Activity extends AppCompatActivity
{
    TextView textView1, textView2, textView3;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        textView1 = (TextView) findViewById(R.id.textView1);
        textView2 = (TextView) findViewById(R.id.textView2);
        textView3 = (TextView) findViewById(R.id.textView3);

        //We create  object of Bundle class that help to get data from MainActivity and used its  getString method

        Bundle bn = getIntent().getExtras();
        String name = bn.getString("fname");
        String email = bn.getString("femail");
        String edu = bn.getString("fedu");
        textView1.setText(String.valueOf(name));
        textView2.setText(String.valueOf(email));
        textView3.setText(String.valueOf(edu));
    }
}

We can implement this using the beneath possible ways,

1. SharedPrefrence
2. Instance (getter , setter method)
3. Constant method

1. SharedPrefrence

    public static final String MyPREFERENCES = "MyPrefs"; 

    // set the sharedprefrence
    SharedPreferences sharedpreferences = getActivity().getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedpreferences.edit();
    editor.putString("MasterAgilData", RestoreMasterData);
    editor.commit();

    // restore the sharedprefrence
    String RestoreMasterData1 = sharedpreferences.getString("MasterAgilData", "");

2. Instance

public class instance {

public static AgilDataList StoreAgilDataList;

public static AgilDataList getStoremasterDataList() {
    return StoreAgilDataList;
}

public static void setStoremasterDataList(AgilDataList storemasterDataList) 
{
    StoreAgilDataList = storemasterDataList;
}
}

3. Constant method (static variable)

public class First_Activity extends Activity {
 public static String USER_FORMATED_NUMBER = null;

 USER_FORMATED_NUMBER="Data you want to pass"; 
}

public class Second_Activity extends Activity {
 String data=First_Activity.USER_FORMATED_NUMBER; 
}