CODEWITHSUNDEEP
javaandroidandroid-intent
triple50
triple50

Reputation: 33

How to pass strings in multiple activities

I want to pass the string from activity to other activities. For example, tell that I have 5 activities I get a text from the second to the third to the forth to the fifth but when I click a button to go to the third the text is not saved how can I save the string when I pass it?

i try to pass the text that i get from second activity to all the others with Intent:

 //While on MainActivity
 Intent Second = new Intent(MainActivity.this, SecondActivity.class);
 startActivity(Second);

 //While on SecondActivity
 Intent Third = new Intent(SecondActivity.this, ThirdActivity.class);
 Third.putExtra("Third", String);
 startActivity(Third);

 //While on ThirdActivity
 TextView String;
 String = findViewByID(R.id.TextView1);
 String.setText(string);
 String string = getIntent().getStringExtra("Third");

 Intent Forth = new Intent(ThirdActivity.this, ForthActivity.class);
 Forth.putExtra("Forth", string);
 startActivity(Forth);

And i passing strings like that until Activity 5 that has a button that goes to the third and the textview text is not saved

I expected when I click the button from activity 5 that goes to the third activity the text view on third activity to be the text from the second activity that I pass it.

Upvotes: 1

Views: 432

Answers (1)

charles-allen
charles-allen

Reputation: 4081

Forward all Extras

You can "forward" all extras using putExtras(intent):

Intent third = new Intent(this, ThirdActivity.class);
third.putExtras(getIntent());
third.putExtra("THIRD", myString);

This will maintain the same key at every step, so if you backtrack (Activity 5 => Activity 3) you can still extract the relevant values for that activity.

Bonus: Use constants to avoid typos

Since your extras might be read in multiple Activities, I would define constants in the final Activity in your flow (I assume a summary or confirmation activity):

public class LastActivity extends AppCompatActivity {

    public static final String EXTRA_NAME = "EXTRA_NAME"
    public static final String EXTRA_EMAIL = "EXTRA_EMAIL"
    public static final String EXTRA_BOOKING_ID = "EXTRA_BOOKING_ID"

    // rest of class
}

Then you don't risk typos when you putExtra or getXxxExtra:

String name = intent.getStringExtra(LastActivity.EXTRA_NAME);

Upvotes: 1

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