CODEWITHSUNDEEP
javaandroidandroid-activity
DontCodeAtAll
DontCodeAtAll

Reputation: 1

Android: display passed data to second activity

I send an arraylist to from my main activity to my second activity with the following code

ArrayList<String> RecipeNames = new ArrayList<>();
RecipeNames.add("Cake");

intentLoadNewActivity.putExtra("names",RecipeNames);
startActivity(intentLoadNewActivity);

And here in my second activity i get the arraylist.

ArrayList<String> names = (ArrayList<String>) getIntent().getStringArrayListExtra("names");
TextView Tname = findViewById(R.id.RecName);

// here I set a textView to be the string that arraylist contains.
Tname.setText(String.valueOf(names));

My problem is when I display the array I get "[Cake]" instead of "Cake"

How do I remove "[]"?

Upvotes: 0

Views: 33

Answers (3)

Reaz Murshed
Reaz Murshed

Reputation: 24231

If you just want to remove the braces, I think the following should serve your purpose. 

Tname.setText(String.valueOf(names)
    .replaceAll("\\[", "").replaceAll("\\]",""));

Upvotes: 0

Arrowsome
Arrowsome

Reputation: 2859

If you need to format the text before showing it on the screen you can use StringBuilder

Example:

StringBuilder stringBuilder = new StringBuilder();
for (String name : names) {
  stringBuilder.append(name);
  stringBuilder.append(" ");
}
textView.setText(stringBuilder.toString());

Upvotes: 0

Jason
Jason

Reputation: 5246

You have a List of String objects but you're trying to display a single one when you're actually displaying multiple. If you want to display a single one, don't pass a List of String, just a String.

If you want to simply get a single String from the List of String objects you can do so with the following.

String anyName = names.stream().findAny().orElse(null);

if (anyName != null) {
    // call setText
}

Upvotes: 1

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