Trying to transfer data from one activity to another in android but it show null value on another activity

Question

I am trying to transfer data from one activity to another activity in android but it show null value on another activity.

My Intent Code at first activity

 Intent  intent = new Intent(QuizActivity.this, WinnerActivity.class);
            intent.putExtra("correctAnswer", score);
            intent.putExtra("incorrectAnswer", incorrectAnswer);
            startActivity(intent);
            finish();

Then in second activity i retrive argument like this:

  correctAnswers = getIntent().getExtras().getString("correctAnswer");
        incorrectAnswers = getIntent().getExtras().getString("incorrectAnswer");

        Toast.makeText(this, "Correct answer is " + "\n" + correctAnswers +
                "\n" + "Incorrect answers is " + incorrectAnswers, Toast.LENGTH_SHORT).show();

But toast is print both variables value null i don't know why.

Answer 1

The values are null in the resultant activity because you are not setting the values in intent.getExtras ().

Use this method instead to get the values in WinnerActivity:

correctAnswers = getIntent().getStringExtra("correctAnswer");
incorrectAnswers = getIntent().getStringExtra("incorrectAnswer");

In QuizActivity: If the values you are passing on to the next activity is still null check the values using log before passing to the next activity.

Intent intent = new Intent();
Log.d("score",""+score);
Log.d("incorresct",""+incorrectAnswer);

intent.putString("correctAnswer", score); 
intent.putString("incorrectAnswer", incorrectAnswer); 
startActivity(intent);